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Dissertations / Theses on the topic 'Dental technology'
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1
Cameron, Donald Alexander. "Teaching dental technology to dental students : a comparison." Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441887.
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Santini, Michele <1993>. "A Novel Approach for Dental Implant Technology." Master's Degree Thesis, Università Ca' Foscari Venezia, 2020. http://hdl.handle.net/10579/16995.
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Al giorno d’oggi la zirconia è un materiale molto utilizzato nelle applicazioni mediche in particolare nel campo della implantologia dentale grazie alle sue proprietà di biocompatibilità, resistenza a frattura e resistenza alla degradazione. In questo contesto si è riscontrato un problema sempre più frequente, l’utilizzo di superfici rugose che velocizzano l’osteointegrazione dell’impianto dentale ma allo stesso tempo aumentano la possibilità di perimplantiti ovvero dell’adesione di batteri sulla superficie. Date queste premesse abbiamo cercato un’alternativa che riducesse il problema sopra esposto tramite l’utilizzo di un materiale ceramico attivo: il nitruro di silicio. Nello specifico, si è valutata l’idea di un coating alla zirconia mantenendone così le sue proprietà caratteristiche ma riducendo il problema grazie alla bioattività del nitruro di silicio. Sono stati introdotti in primo luogo i concetti quali materiali ceramici avanzati, biomateriale e fornita un’analisi delle proprietà di Si3N4 e ZrO2; è stato poi introdotto il concetto di tessuto osseo per dare una visione dettagliata sul processo di osteointegrazione cellulare e definita l’azione dei batteri su protesi dentali. All’interno del paper vengono descritti i batteri stafilococco epidermidi e le linee cellulari osteosarcoma SaOS-2 che sono stati utilizzati per questo lavoro. I diversi campioni di zirconia e zirconia coated nitruro di silicio sono stati testati in ambienti biologici utilizzando linee cellulari: osteosarcoma (SaOS-2). Dapprima è stata fatta la caratterizzazione di ceramiche ZrO2 trattate in superficie e rivestite con diversi strati di Si(3+x)N(4-y) non stechiometrico per indurre un effetto antibatterico e stimolare la proliferazione cellulare. Si sono studiate quattro tipologie di substrati: zirconia polished; zirconia rough; zirconia coated di nitruro di silicio e nitruro di silicio come positive control. Per valutare la morfologia e proprietà superficiali, i campioni sono stati pre-caratterizzati con tecniche spettroscopiche e microscopiche quali: Laser microscopie, Raman, FT-IR, XPS e SEM. I risultati hanno mostrato una scarsa concentrazione di nitruro di silicio nel coating con zirconia. Successivamente i campioni sono stati caratterizzati utilizzando test in vivo con vari marcatori biologici e batterici e tecniche di imaging. La spettroscopia Raman, il microscopio a fluorescenza e SEM sono stati gli strumenti che hanno consentito la caratterizzazione dell’efficacia antibatterica, ovvero l’adesione di batteri sulla superficie dei campioni e il processo di osteointegrazione, ovvero la formazione e la crescita di idrossiapatite (HA). I risultati hanno evidenziato una scarsa attività antibatterica per tutti i campioni, caratteristica prevedibile nella zirconia la quale non presenta per natura attività antibatterica, un altro discorso va invece fatto per il coating di nitruro di silicio che presenta questa caratteristica per una scarsa concentrazione di nitruro sulla superficie. Successivamente si è evidenziata la presenza di composti biologici e HA in diverse quantità in tutti i campioni confermando le buone proprietà di biocompatibilità e osteointegrazione di nitruro di silicio e zirconia. Il campione di coating di nitruro di silicio ha invece dimostrato la migliore osteointegrazione, Data la bassa attività di nitruro di silicio emersa al termine dell’esperimento, si è compreso che è possibile migliorare la superficie delle protesi dentarie attraverso un coating sulla zirconia dal punto di vista antibatterico e osteointegrativo.
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Salih, Mayson. "Disinfection Procedures: Effects on the dimensional accuracy of Gypsum casts." Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3067_1257931628.
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The aim of the study was to assess the dimensional accuracy of Gypsum models following chemical disinfection of the impressions and to compare it with the accuracy of gypsum models exposed to microwave irradiation disinfection. Results indicated that the dimensional accuracy of the gypsum models disinfected in a microwave oven did not differ significantly from models in the control group. Except for models produced from SS white (SS White group, England) impressions where models irradiated in microwave exhibit significant improvement in the dimensional accuracy when compared with control group...
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Suansuwan, Napa. "Application Of Strain Energy Release Rate To Characterise The Adhesion At Ceramic-Metal Interfaces." Thesis, The University of Sydney, 2001. http://hdl.handle.net/2123/4865.
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Evans, Jane Lesleigh. "An Evaluation of Interprofessional Education in the Teaching of Dental Technology." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/366494.
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It is now fifteen years since Australia’s National Health and Medical
Research Council called for a collaborative approach to the education of dental
health professionals. In spite of this, challenges remain in improving the
cohesiveness of the oral health team. While the potential value of
interprofessional education is strongly asserted by various stakeholders, in
reality a paradigm shift still needs to occur at educational, professional and
organisational levels. To contribute to the limited knowledge in the field of
dental technology education, this research compares the attitudes and
perceptions of dental technology students and graduates from two different
curricula about collaborative working as a member of an oral health team.
Differences in curriculum structure and content between the Technical and
Further Education (TAFE) and University sectors were analysed in relation to
the extant literature on interprofessional education. A mixed method approach
then explored attitudes and readiness of students and graduates for
collaborative professional practice. Both quantitative and qualitative
approaches were used. Cross-sectional data were collected from participants
during and after the completion of the Bachelor of Oral Health in Dental
Technology at Griffith University, Gold Coast, and Diploma of Dental
Technology at Southbank Institute of Technology, Brisbane. Third and fifth
year dental students at Griffith University were also included, as exemplars of
other members of the oral health team who learn alongside dental technology
students.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Dentistry and Oral Health
Griffith Health
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Reyes, Silveyra Lupita Jocelin. "Investigations on automated methods for dental plaque detection." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3230/.
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This thesis investigated different quantitative methods for dental plaque detection using digital imaging. Firstly, based on a commercially available two-tone disclosing, the concentration of the dyes in the blue disclosing solution was calculated. This blue dye was used to disclose dental plaque accumulated on natural teeth and complete upper dentures (on two different backgrounds). Digital images were acquired under visible light, in the n-IR spectrum and with a narrow band-pass interference (NIB) filter tuned to the absorption spectrum of the blue dye. The results showed that disclosing dyes and disclosed dental plaque are transparent in the n-IR spectrum whilst the NIB filter maximised the contrast of dental plaque in the images when using the blue stain. A number of computerised segmentation methods were applied to these images showed automation of dental plaque detection to identify reliable methods to quantify plaque coverage. Although minor human intervention was still required in the segmentation process, the continuous development of new software promises that full automation in plaque quantification is almost a reality. Finally, analysis of the inter- and intra-examiner reliability of the commonly used Quigley and Hein index showed moderate reliability, highlighting the need for automated, quantitative and more reproducible methodology.
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Pow, Ho-nang Edmond. "Linear dimensional change of heat-cured acrylic resin complete dentures after reline and rebase." Click to view the E-thesis via HKUTO, 1995. http://sunzi.lib.hku.hk/HKUTO/record/B38628132.
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Pow, Ho-nang Edmond, and 鮑浩能. "Linear dimensional change of heat-cured acrylic resin complete dentures after reline and rebase." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B38628132.
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Esfandiari, Mahsa. "Can oral health technology assessment promote evidence-based decision making in undergraduate dental faculties?" Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114518.
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Objectives: To investigate the effect of Oral Health Technology Assessment (OHTA) on Evidence-Based Decision Making (EBDM) in the undergraduate dental curriculum. Methods: This study was performed at two levels; 1) the literature review where electronic data bases including PUBMED, MEDLINE, EMBASE, COCHRANE LIBRARY, and CINHAL were searched, and 2) A need assessment by means of interviewing a few faculty members and graduating trainees for systematic evaluation of dental technologies was performed at the McGill University, faculty of Dentistry. Results: Our preliminary evaluation of assessing dental technologies in Canadian faculties reveals a random decision making pattern with no regards to adoption and utilisation of EBDM in undergraduate curriculum. There is also no evidence of either integrating EBDM or systematic evaluation of dental technologies in dental faculties. Conclusion: Within the limitation of this study our findings suggest that the systematic assessment of dental technologies may help faculties to integrate EBDM in their curriculum and that technology assessment committees could provide faculty members and students with the latest developments in dental technologies that are suitable for university dental clinics.Objectifs: Pour étudier l'effet de Oral Health Technology Assessment (OHTA) sur Evidence-Based Decision Making (EBDM) dans le programme de premier cycle de médecine dentaire. Méthodes: Cette étude a été réalisée à deux niveaux: 1) la revue de la littérature où les bases de données électroniques, y compris PubMed, MEDLINE, EMBASE, Cochrane Library, et CINHAL ont été fouillés, et 2) Une évaluation des besoins au moyen des entrevues avec des membres du corps professoral et diplômés stagiaires pour une évaluation systématique des technologies dentaires a été réalisée à l'Université McGill, faculté de médecine dentaire. Résultats: Notre évaluation préliminaire de l'évaluation des technologies dentaires dans les facultés canadiennes révèle un modèle de décisions prises au hasard, sans concerne envers l'adoption et l'utilisation de EBDM dans les programmes de premier cycle des facultés médecine dentaire. En plus, il n'y a aucune preuve de intégration de EBDM ou l'évaluation systématique des technologies dentaires dans les facultés dentaires. Conclusion: Dans la limite de cette étude, nos résultats suggèrent que l'évaluation systématique des technologies dentaires peuvent aider les facultés de médecine dentaire à intégrer EBDM dans leur curriculum et que les comités d'évaluation des technologies pourrait fournir aux membres du corps professoral et les étudiants les derniers développements dans les technologies dentaires qui peuvent être adaptés dans les curriculum dentaires.
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Manton, Jesse West. "Medical Emergency Management in the Dental Office: A Simulation-Based Training Curriculum for Dental Residents." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1565360422025093.
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Viswanath, Aiswarya. "Dental stem cell delivery through new injectable matrices for spinal cord regeneration." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/47606/.
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Traumatic spinal cord injury (SCI) is a global health problem involving complex pathophysiological cascade and afflicts both developing and developed countries. Transplantation of Mesenchymal stem cell population such as dental stem cells (DSC) have demonstrated preclinical potential for central nervous system (CNS) repair. The work presented in this thesis has evaluated the potential of dental stem cells from apical papillae (SCAP) in combination with different biomaterials for SCI repair. ECM scaffolds were produced from different mammalian tissues including spinal cord, bone and dental hard tissue using different decellularisation processes. Scaffolds were then digested with pepsin to allow solubilisation and hydrogel formation. The ECM hydrogels were characterised and embedded with SCAP to investigate the effect of morphological and biochemical properties upon cell characteristics. All the hydrogels maintained high cell viability and an increase in the cell number with a satisfactory metabolic activity. However, only ECM hydrogels from decellularised spinal cord and bone tissue supported the expression of neural lineage and pro angiogenic markers with stronger responses observed with spinal cord ECM hydrogels. Biodegradable PLGA-Triblock (PLGA-TB) microparticles were fabricated to provide controlled release of glial cell derived neurotrophic factor (GDNF) and may facilitate SCAP attachment. An optimal PLGA-TB microparticle formulation was selected based on the size, surface morphology and release profile achieved. All commercial preparation of GDNF being stabilised in salt, a modified protocol was required to prepare microparticles. The formulation was modified with 10mM sodium acetate which led to a successful encapsulation and sustained release of bioactive GDNF. To support SCAP attachment and survival, PLGA-TB microparticles surfaces were coated with different ECM pre-gel solutions (spinal cord and bone tissue ECM) and laminin. Assessment of surface coating with ToF-SIMS showed protein adsorption on all the coated microparticles, with a higher adsorption on ECM pre-gel coated microparticles. All the surface modified PLGA-TB microparticles supported prolonged SCAP attachment and survival. Laminin and bone ECM pre-gel coated microparticles promoted a significant increase in SCAP number after 7 days. Over all, the result in this thesis have shown that SCAP combined with decellularised mammalian tissue derived ECM hydrogels or GDNF loaded PLGA-TB microparticles may facilitate delivery of autologous stem cells to promote spinal cord repair.
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Yavner, Susan. "Managing professionals in health care organizations : implications from a study of dental franchises." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/17266.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1991.Title as it appears in the Feb. 1991 M.I.T. Graudate List: Managing health care professionals.
Includes bibliographical references.
by Susan Yavner.
Ph.D.
13
Shelh, Malaz. "Usability evaluation of electronic dental record systems in Sweden : A survey among dentists and dental hygienists." Thesis, Linnéuniversitetet, Institutionen för medicin och optometri (MEO), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104224.
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Electronic Dental Records (EDR) are an important part of dental care in Sweden. The usability of these records can affect the workflow in dental care organizations. This study aims to measure the System usability scale (SUS) score of EDRs that are used in dental clinics in Sweden. The study will also investigate the relationship between the SUS score of EDRs and participants’ age, gender, interest in technology, number of patients per workday, professional experience, possible special training to use the EDR, and the period of the training. The study will also rank the most common usability problem in EDRs among the seven possible usability problems included in the questionnaire. The study will present how the participants describe experienced usability problems in the EDRs. The quantitative method constitutes the largest part of this study, while the open-ended questions were used to get a deeper knowledge about some of the usability problems. A digital questionnaire was used in this study to gather data from 115 dentists and 77 dental hygienists who work at various dental clinics around Sweden to get a statistical anchored description about the usability of various EDRs. SUS indicates a low usability level in the EDRs included in the study and a significant negative correlation between the frequency of using EDRs and usability. The males showed better experience with the usability of the EDRs compared to females. The highest-ranked usability problem was the need for users to spend a long time to document patient cases. The usability problems were summarized into three categories which are: an inefficient user interface, lack of semantic interoperability, and users relying on paper.Elektroniska journalsystem är en viktig del av tandvården i Sverige, då användbarheten av dessa system kan påverka arbetsflödet i tandvårdsorganisationer. Denna studie syftar till att mäta System usability scale (SUS) poäng för olika elektroniska journalsystem som används i olika tandkliniker i Sverige. Studien kommer också att undersöka sambandet mellan SUS-poäng för elektroniska journalsystem och deltagarnas ålder, kön, intresse av teknologi, antal patienter per arbetsdag, yrkeserfarenhet, möjlig specialutbildning för att använda elektroniska journalsystem och perioden för denna utbildning. Studien kommer också att rangordna det vanligaste användbarhetsproblemet i journalsystem bland de sju möjliga användbarhetsproblemen som ingår i frågeformuläret. Studien kommer att presentera hur deltagarna beskriver upplevda användbarhetsproblem i journalsystem. Den kvantitativa metoden utgör den största delen av denna studie, medan de öppna frågorna användes för att få en djupare kunskap om några av användbarhetsproblemen. Ett digitalt frågeformulär användes i denna studie för att samla in data från 115 tandläkare och 77 tandhygienister som arbetar vid olika tandkliniker runt om i Sverige för att få en statistisk förankrad beskrivning om användbarheten av olika elektroniska journalsystem. SUS indikerar en låg användbarhetsnivå i de systemen som ingår i studien. Vi upptäckte också en signifikant negativ korrelation mellan frekvensen av att använda systemen och användbarhetsnivån. Män visade en bättre upplevelse för användbarhet av systemen jämfört med kvinnor. Det högst rankade användbarhetsproblemet var användarnas behov av lång tid för att dokumentera patientfall. Vi sammanfattade hur deltagarna beskriver upplevda användbarhetsproblem i journalsystem under tre kategorier som är: ett ineffektivt användargränssnitt, brist på semantisk interoperabilitet och användare som skriver på en lapp.
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Esfandiari, Shahrokh. "Oral health technology assessment : study of mandibular 2-implant overdentures." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115892.
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There is little evidence that Health Technology Assessment (HTA) is much used in dentistry. Dental implant technology is an example of innovative oral health technology. The objectives of this research were to gather the evidence needed for the assessment of overdenture implant treatment so that both patients and dental practitioners can make informed decisions about this technology. These objectives included 1) investigating what types of dental clinicians adopt and provide dental implants 2) determining the effect of the clinicians' experience in the provision of implant supported prostheses and 3) measuring the patients' preference in provision of mandibular 2-implants overdenture technology.For the first part, a cross-sectional survey was sent to all licensed Canadian Dentists to measure the adoption and provision of implant technology. For the second part, we used the data on the first 140 edentulous elders who were enrolled in a randomized controlled clinical trial to compare the effects of mandibular conventional (CD) and 2-implant overdentures (IOD) on nutrition. The change in patient ratings of satisfaction after treatment, laboratory costs and the number of unscheduled visits were compared. For the last part, edentulous elders (N=36) who were wearing maxillary dentures and either a mandibular conventional denture (CD, n=13) or a two-implant overdenture (IOD, n=23) participated in this study. Participants' preference was measured during a 20-minute interview.
Multivariate regression analysis on the data from the first part of the study shows that the Dentist's gender, province of practice, specialty, and whether they practice alone or in association with other practitioners, are significantly associated with the adoption of implant technology (p<0.05). It is also shown that there was no difference in satisfaction scores for either prosthesis between the groups treated by experienced specialists or new dentists. Furthermore, it is shown that IOD wearers were willing to pay three times more than the current cost of conventional dentures for implant prostheses (p<0.05).
Overall, the results of this study 1) inform decision makers on what types of clinicians provide implant technology and 2) suggest that, with minimal training, all dental clinicians irrespective of their specialty, can provide successful implant overdenture prostheses that edentulous patients are willing to pay for.
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Sell, Janet A. "Traditional and Hybrid Dental Assisting Program| An Exploration of Design and Optimal Outcomes for Community College Students." Thesis, Lindenwood University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10123635.
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This study was designed to investigate an accredited dental assisting educational program at a Midwest community college. The Bureau of Labor of Statistics (2015) claimed the profession of dental assisting is one of the fastest growing occupation, along with ongoing research that good oral health is linked to overall general health, thereby increasing the need for more dental assistants in the workforce. The aim of this study was to determine if dental assisting students taking courses in a face-to-face traditional format performed differently from students taking courses in a hybrid (a combination of face-to-face and online) format. The researcher invited a total of 92 students from cohorts in 2012, 2013, and 2014 to participate. Of the students who elected to participate, 62% were from the traditional cohort, and 39% were from the hybrid cohort. Data collected from a cross-sectional survey focused on the tenets of the theory of Communities of Practice. De-identified data were collected to compare students’ progress between the traditional and hybrid cohorts with retention rates and national examination scores using a t-test for data analysis. The results confirmed no statistically significant performance differences were apparent between the two groups of students. The hybrid delivery format was as effective in educating dental assisting students as the traditional educational format.
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O'Beirne, Joanne L. "Development and characterisation of a Portland cement-based dental root filling material." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1528/.
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Mineral trioxide aggregate (MTA) is a Portland cement (PC)-based endodontic material used for sealing root canals. This study investigated the effect of calcium sulphate additions for improving the undesirably-long setting time of MTA-like dental materials, whilst maintaining the mechanical, biological and sealing properties. 10wt%PoP accelerated initial setting times of grey and white model cements and MTA from >6h to <40min, and did not significantly change compressive strengths and relative porosities with long-term storage in media. Cement pastes containing PoP may „false‟ set or stiffen through gypsum precipitation, seen in scanning electron photomicrographs of MTA-like cements with 30wt%PoP. Similar in vitro responses of adult and neonatal BMSC, periosteal and osteoblastic cultures were noted with PoP-modified and unmodified cements. Inhibition of cell growth was seen with 3day-cultures containing modified model cements and MTA, the possible result of calcium hydroxide release from cements. Sealing properties were characterised using dye leakage studies and concluded that the sealing abilities of model cements and MTA were not compromised by PoP addition. In summary, 10wt%PoP has shown potential as a modification to MTA by reducing the setting time whilst maintaining mechanical stability, solubility, in vitro responses to and the sealing properties of MTA, therefore, warrants further investigation.
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Liberman, Leila Helene. "A Phenomenology Study on Dental Faculty Preparedness for Using Technology in Face-to-Face, Hybrid Courses, and Online Course to Reach Digital Native Learners." Thesis, Northcentral University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10745305.
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The exponential growth of online and hybrid education is most pressing and rapidly changing, increasing the need for faculty development programs for the traditional and online educator (Herman, 2012; Quinn & Kennedy-Clark, 2015). The students of today are referred to as the digital native student (DNS; Akcayir, Dundar, & Akcayir, 2016). Teaching faculty at dental schools are from the baby boomer and traditionalists’ generation (ADEA Snapshot, 2017). Additionally, there are many institutions where the teaching faculty are trained in a specific trade or skill and do not understand the need for a teaching pedagogy related to the DNS needs (Behar-Horenstein, Garvan, Catalanotto, Yu, & Xiaoying, 2016).
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Rungnava, Punyanit. "Learning for dental practice: Ethnographic case study of pre-clinical embodied practice in a technology-enhanced simulation laboratory setting." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/28857.
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Dental education combines theories and practice regarding preparing students for clinical practice. Presently, dental education has implemented technological simulators in teaching pre-clinical embodied practice. Many studies of simulation technologies have revealed they have some advantages over simpler techniques. However, there is still little evidence to support knowledge of how to design pre-clinical courses integrating technology in simulation-based teaching and learning. This challenge also affects the Prosthodontic department in designing pre-clinical simulation laboratory courses, as dental educators encounter difficulties in teaching with the new technological simulator – the DentSim system.
An ethnographic case study was used to obtain detailed information about students’ practice. The knowledge from in-depth investigation may help professional educators and educational designers decide which technologies and instructional approaches are suitable for the courses. The Activity-Centred Analysis and Design (ACAD) framework was used for capturing and understanding detailed information about the course. Thirteen third-year dental students, who had no experience practising on the pre-clinical course and with the DentSim system, volunteered to participate in the study. The data were gathered by using two approaches: participant observations and interviews.
In summary, this thesis identified some principles for improving the design of an effective pre-clinical laboratory course regarding balancing and integrating the DentSim system and other aspects of practice. The thesis should also be of value to other professional educators and educational designers who would like to implement similar technologies and approaches in their courses and/or to undertake similar research in this field.
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Howell, Kent Jon. "Accuracy of the Biomet 3i Encode® Robocast™ Technology Versus Conventional Implant Impression Techniques." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306772544.
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Lindström, Therese, and Elizabeth Tapia. "Marginal discoloration in dental veneers - Depending on type of cement and removal technique of excess cement." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19637.
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Syfte: Syftet med denna studie var att undersöka resistens mot marginala missfärgningar av en adhesivt cementerad keram till emalj beroende på typ av cement, teknik för avlägsnande av överskottscement och kombinationen av de två faktorerna.Metod: 60 extraherade tänder preparerades i emalj med en slipmaskin till en 90° vinkel. Sintrat IPS E-max CAD preparerades till 60 bitar med måtten 3x3x1mm. Glaskerambitarna cementerades med Variolink®Veneer, Variolink®II och Panavia™F 2.0 enligt bruksanvisning med en kraft på 5kg. Varje cementgrupp bestod av 20 provkroppar där cementöverskottet avlägsnades med putsning eller konventionell teknik. Detta ledde till totalt 6 grupper med 10 provkroppar i varje grupp. Provkropparna termocyklades i 5000 cyklar i destillerat vatten med temperaturen 5° C till 55° C, därefter placerades provkropparna 4 dagar i kaffe och 4 dagar i rött vin. Missfärgningsgraden av det marginala cementet avlästes i en blindad studie under mikroskop av två observatörer med signifikant klinisk erfarenhet inom dentala keramer. Resultat: Variolink®Veneer var det minst missfärgande cementet oberoende av avlägsningsteknik, men resultatet var inte statistiskt signifikant. Putsning visade bättre motstånd gällande missfärgning jämfört med konventionell teknik och detta resultat var statistiskt signifikant. Variolink®II tillsammans med putstekniken var det minst missfärgande kombinationerna.Signifikans: Inom de begränsningar en in vitro studie medför kan följande slutsats dras; den viktigaste parametern gällande resistens av marginal missfärgning är ej val av cement utan tekniken för avlägsning av överskottscement.Purpose: The aim of this study was to investigate the resistance to marginal discoloration of an adhesively cemented bondable ceramic to enamel depending on choice of cement, the technique used for removing excess cement and a combination of the two factors. Method: 60 extracted teeth were prepared in the enamel with a grinding machine to an approximately 90° angle. A block of IPS E-max CAD was sintered and thereafter sliced into 60 pieces with the measurement 3x3x1mm. The ceramic pieces were cemented with Variolink®Veneer, Variolink®II and Panavia™F 2.0 following the manufacturer’s instructions with a force of 5kg (20 specimens in each group). The excess cement was removed by either polishing technique or conventional technique leading to 6 groups with 10 specimens in each group. The specimens were thermocycled for 5000 cycles in 5° C and 55° C distilled water baths and after placed in coffee for 4 days and red wine for 4 days. The discoloration degree of the cement margin was analysed blindly under microscope by two observers with significant clinical experience in dental ceramics.Results: Variolink®Veneer was the least discolored cement but the result was not statistical significant. When comparing polishing and conventional technique, polishing showed least discoloration independent of choice of cement. Variolink®II together with the polishing technique showed least discoloring mean and median value of the 6 groups.Significance: Within the restrictions an in vitro study has, the following conclusion can be made; the most important parameter regarding resistance to marginal discoloration is not the choice of cement but how the excess cement is removed.
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Kramer, Kathryn Daugherty. "The role of behavioral technology in the promotion of oral health behavior." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90933.
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This study implemented two behavior management strategies, self-monitoring and monetary incentives, in a dental clinic and a private periodontal practice to explore the effects of these intervention strategies on subjects' dental flossing frequencies and to compare these strategies to standard educational procedures. Group analysis of four dependent variables generally showed minimal impact of the intervention strategies on flossing frequency. However, when the percentages of subjects within groups who improved on the dependent measures were evaluated, differential effects for some dependent variables were noted between settings and among intervention strategies. Based on those findings, the behavioral strategies of self-monitoring and monetary incentives did appear to enhance the effectiveness of education.
Multimodal measures were used to assess changes in the target behavior. The general lack of covariance found among the dependent measures used in this study demonstrated that the interpretation varied with the choice of dependent variable. This finding suggested that past researchers, who used only physiological dependent measures to assess changes in the frequencies of dental flossing and brushing behaviors, should have selected more direct measures of the targeted behaviors (e.g. unobtrusive measures or direct observations).M.S.
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Dragan, Irina F. "The Impact of the Evidence-Based Clinical Decision Support Resource "UpToDate" on the Speed and Accuracy of Determining Drug-Drug-Interactions in a Dental Setting| A Randomized Crossover Controlled Pilot Trial." Thesis, Tufts University School of Dental Medicine, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10839656.
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Aim & Hypothesis: The aim of the study was to compare the time dental students need to answer questions about drug-drug interactions (DDI) when using the Evidence-Based Clinical Decision Support Resource (EBCDSR) UpToDate® to retrieve patient-critical information versus general internet access, during a preclinical session. We hypothesized that the dental students utilizing the UpToDate® would take less time to identify the correct DDIs and obtain higher examination scores, compared with the group with only internet access.
Materials & Methods: The proposed study design was a randomized blinded crossover controlled pilot and each subject examined four computer-based virtual cases, during two study visits. In the first visit, one group assessed two cases presented in axiUm (Tufts University School of Dental Medicine’s electronic health record system), using UpToDate ® access and the other group, using their own electronic resources assessed other two cases with no UpToDate® access, and determined the DDI. At the second visit, after the ten days wash-out period, the cross-over took place. Each case was followed by three questions regarding the drug-drug interactions, focusing on the use of antibiotics, analgesics and local anesthetics. The mean time duration of the sessions conducted by each subject was captured and calculated. Chi-square tests were used for the statistical analysis of the examination scores. All statistical analyses were performed using SAS Version 9.2 (SAS Institute, Cary, NC).
Results: A total of 50 dental students presented for the first study visit and 44 dental students for the second study visit. The third year dental students utilizing the UpToDate® took a similar amount of time to identify the correct DDIs compared with the third year dental students with no UpToDate® access and only internet access (p-value = 0.429). Both groups obtained similar examination scores for all the questions related to antibiotics (p-value = 0.797), analgesics (p-value = 0.850) and local anesthetics (p-value = 0.850).
Conclusions: The current study has shown that UpToDate ® can provide answers to clinical questions at the point of care in a timely manner, with a high level of student satisfaction. Future studies might involve a more seamless entry into EBCDSR’s using “Infobutton” in the Electronic Health Record (EHR).
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Alenezi, Hanadi. "Evaluation of faculty perceptions of online dental education in the Kuwait University Faculty of Dentistry." Thesis, University of the Pacific, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1588024.
Full textAbstract:
In recent years, online learning has become a recognized method for delivering educational content in numerous institutions of higher education. Despite the prevalence of this new method of education and training, few studies have been performed regarding online learning in the field of dental education. This research describes and analyzes faculty perceptions in the Kuwait University-Faculty of Dentistry regarding online dental education. Out of sixty-six full-time faculty members thirty-three of them have responded to questionnaires regarding their perceptions. The data were analyzed for themes and patterns. There was a general positive perception toward online learning as a good tool to enhance dental education. When replying to questions about the challenges and obstructions of online learning, faculty members’ answers indicated that a lack of time and administrative support created barriers to teaching online learning courses.
Viewpoints of the faculty members were further analyzed by age, gender, education level, and teaching experiences. The results showed some variation in the levels of agreement toward online learning based on various components of identity. Females were slightly more positive about online teaching and learning. However, there were no noticeable differences between faculty members of different ages. The academic positions did correlate with perceptions: those who hold the highest academic position (professors) had the least favorable perceptions of online teaching. Further, participants who had 6 to 10 teaching experience years had a stronger positive attitude than those who had been teaching for fewer than 5 years or more than 16 years.
Keywords: online education, dental education, web-based learning, distance learning, e-learning, faculty perception.
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Bernatavicius, Sergio Tadeu. "Utilização de microesferas de poli (L-acido-latico) contendo medicamento no tratamento de perda do tecido dental." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263896.
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Orientador : Eliana Aparecida de Rezende DuekDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-04T01:54:38Z (GMT). No. of bitstreams: 1 Bernatavicius_SergioTadeu_M.pdf: 9386061 bytes, checksum: 9e736c52e1042de3187574f10e183c68 (MD5) Previous issue date: 2004
Resumo: Um dos pontos que deve ser considerado de difícil solução no Brasil, é a perda dentinária. Vários materiais tem sido estudados para minimizar o problema, mas nenhum atende às necessidades de tal aplicação. Nesse sentido, o objetivo do presente avaliar a biocompatibilidade do Poli (L-ácido-Iático), PLLA, contendo vancomicina e piroxicam no tratamento de grandes perdas de dentina onde pode ou não ocorrer a exposição da polpa dental, casos onde a exposição leva ao tratamento endodontico ou exodontia. Para tanto, foram realizados estudos in vivo em coelhos e humanos, ambos aprovados pelo Comitê de Ética em Pesquisa da Universidade Estadual de Campinas parecer número 490/2003.Os estudos em coelhos foram realizados utilizando-se de um modelo experimental onde foi implantado as microesferas contendo medicamento nos incisivos centrais e após 20, 40, e 60 dias os dentes foram cortados e submetidos à análise histológica. Após 20 dias de implante, verificou-se regiões centrais de hipocalcificações em relação ao implante e formação de pontos de dentina. Não foi localizado processo inflamatório em função da utilização dos medicamentos. Após 40 dias verificou-se a que a calcificação começa por áreas globulosas que crescem e se fundem, porém o processo muitas vezes é imperfeito, resultando áreas de matriz orgânica não calcificada; são as áreas interglobulares. Após 60 dias, verificou-se a formação de tecido de normalidade o que demonstra a eficácia das microesferas com medicamento como material reparador. A análise in vivo em humanos se fez necessária para avaliar a resposta frente à aplicação do material, seu efeito antiinflamatório e analgésico em casos de exposição pulpar e grande perda dentinária, além da avaliação do retomo da função ao elemento dental, ou seja, controle da dor e possibilidade de mastigação normal. Observou-se após 60 dias que todos os pacientes implantados não apresentaram dor a nenhum dos testes realizados e mantinham a vitalidade pulpar, as microesferas com medicamento aqui também se mostraram eficazes no controle antiinflamatório e infeccioso. O estudo in vivo indicou que as microesferas de PLLA contendo vancomicina e piroxicam apresentam grande potencial para serem utilizadas para aplicação em questão, já que o material favorece a formação de uma neodentina e controla os processos inflamatório e infeccioso
Abstract: One of the points that it should be considered of difficult solution in Brazil, is the loss dentine. Several materials have been studied to minimize the problem, but none assists to the needs of such application. In that sense, the objective of the present to evaluate the biocompatibility of the Poly (L-lactide acid), PLLA, contends vancomicina and piroxicam in the treatment of great dentin losses where cannot or not to happen the exhibition of the dental pulp, cases where the exhibition takes to the treatment endodontic or exodontia. For so much, studies in was accomplished In vivo in rabbits and humans, both approved by the Comitê de Ética em Pesquisa da Universidade Estadual de Campinas to seem number 490/2003. The studies in rabbits were accomplished being used of an experimental model where it was implanted the microesferas contends medication in the incisive central and after 20, 40, and 60 days the teeth were cut and submitted to the analysis histological. After 20 days of it implants, it was verified central areas of hipocalcification in relation to the it implants and formation of dentin points. Inflammatory process was not located in function of the use of the medications. After 40 days the one was verified that the calcification begins for areas interglobules that grow and they are founded, even so the process a lot of times it is imperfect, not resulting areas of organic matrix not calcified; they are the areas interglobules. After 60 days, the formation of normality tissue was verified that demonstrates the effectiveness of the microspheres with medication as reparative material. The analysis in vivo in humans if made necessary to evaluate the answer front to the application of the material, its effect antiinflammatory and analgesic in cases of exhibition pulp and great loss dentine, besides the evaluation of the return of the function to the dental element, that is to say, control ofthe pain and possibility of normal mastication. It was observed after 60 days that ali the implanted patients didn't present pain to none of the accomplished tests and they maintained the vitality pulpar, the microspheres with medication here was shown also effective in the control antiinflammatory and infectious. The study in vivo it indicated that the microspheres of PLLA contends vancomicina and piroxicam they present great potential for they be used for application in subject, since the material favors the formation of a neodentine and it controls the inflammatory and infectious processes
Mestrado
Materiais e Processos de Fabricação
Mestre em Engenharia Mecânica
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Havertz, Matthew S. "A Narrative Approach to Educational Video Training." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7596.
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Teachers often use videos to teach their students, but stories are not used as often in educational videos as they could be. Experts tell us that stories are an important part of teaching and learning. Unfortunately, there is only a small amount of research and no definitive expert agreement about stories used in educational videos. This is especially true for videos used with technical education students, like mechanic students or dental assisting students. In this study, dental assisting students learned how to assist a dentist with a standard cavity procedure after watching a video with or without a story. The study measured which video helped students get better quiz scores, feel more motivated, and which videos they preferred better. The students were randomly assigned to watch either video. The results demonstrated no significant difference in quiz scores or motivation, part of this was due to the low number of participants in this section of the study. Another group of students were shown both videos and then interviewed to determine additional insights. Overall, students preferred the video without the story as a reference for the dental cavity procedure. Students also seemed to like the video without the story because it was short and simple. In contrast, students reported the video with the story was more emotionally engaging, especially in regards to developing empathy for patients. Students also reported the video with the story better helped prepared them to work with patients.
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Brzoska, Patrick, Fabian Erdsiek, and Dorothee Waury. "Enabling and Predisposing Factors for the Utilization of Preventive Dental Health Care in Migrants and Non-Migrants in Germany." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-230188.
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Background: In many European countries including Germany, migrants utilize preventive services less frequently than the majority population. This is also true for the utilization of dental checkups. Little is known about which demographic, social, behavioral, and health-related factors influence the decision of migrants to seek preventive dental health care and how these factors differ from those in non-migrants. The aim of the present study was to examine the role of these factors among migrants and non-migrants residing in Germany.
Methods: Data from cross-sectional national health surveys are used, providing information on preventive dental health behavior from n = 41,220 individuals, of which 15.0% are migrants. Andersen’s Behavioral Model of Health Services Use is the conceptual framework of the investigation. Multiple logistic regression models were applied to examine the role of different predisposing and enabling factors. Interaction terms were included in order to examine whether determinants differ between migrants and non-migrants. Average marginal effects (AMEs) are reported in addition to odds ratios (ORs) as measures of effect size which are robust against bias arising from unobserved heterogeneity.
Results: Migrants are at an about 36% lower chance of utilizing regular dental checkups than non-migrants [OR = 0.64 (95% confidence interval, 95% CI: 0.61, 0.68); AME = −0.081 (95% CI = −0.093, −0.069)]. Differences are partly explained by the influence of demographic, social, behavioral, and health-related factors [adjusted OR = 0.69 (95% CI: 0.64, 0.73); AME = −0.065 (95% CI = −0.076, −0.053)]. Younger age, being male, lower socioeconomic status, a non-statutory health insurance, not living in a relationship, living in the Western part of Germany and in an urban setting, and poor limited social support were associated with a lower chance of utilizing regular dental checkups. Interaction effects could be observed for age and for the type of health insurance.
Discussion: The study identifies different enabling and predisposing factors that are relevant for the utilization of dental checkups among the population in Germany, some of which differ between migrants and non-migrants. Differences are particularly pronounced for younger ages. This differs from findings on other preventive services where older migrants tend to be more disadvantaged. Additional explanatory factors such as barriers that migrants experience in the dental health care system need to be considered in order to implement patient-oriented services and to reduce disparities in access to dental prevention.
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Erdsiek, Fabian, Dorothee Waury, and Patrick Brzoska. "Oral health behaviour in migrant and non-migrant adults in Germany: the utilization of regular dental check-ups." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-226518.
Full textAbstract:
Background
Migrants in many European countries including Germany tend to utilize preventive measures less frequently than the majority population. Little is known about the dental health of migrants as well as about their oral health behaviour, particularly in the adult population. The aim of this study was to examine differences in the uptake of annual dental check-ups in adult migrants and non-migrants in Germany.
Methods
We used data from the cross-sectional survey ‘German Health Update 2010’ conducted by the Robert Koch Institute (n = 22,050). Data from 21,741 German-speaking respondents with information on the use of dental check-ups was available, of which 3404 (15.7%) were migrants. Multiple logistic regression models were applied to adjust for demographic and socioeconomic confounders, including the place of residence as well as type of health insurance.
Results
Migrants were generally younger, had a lower socioeconomic status and showed a lower utilization of dental check-ups. The unadjusted odds ratio (OR) for utilization was 0.67 (95%-CI = 0.61–0.73). After adjusting for demographic and socioeconomic confounders the chance only increased slightly (adjusted OR = 0.71; 95%-CI = 0.65–0.77).
Conclusions
The analysis shows that migration status is associated with a reduced chance of attending dental check-ups, independently of demographic and socioeconomic factors. The influence of other factors, such as type of health insurance and place of residence had also no influence on the association. Migrants are exposed to different barriers in the health care system, comprising the patient, provider and system level. Further studies need to examine the relevant barriers for the uptake of preventive dental services in order to devise appropriate migrant- sensitive measures of dental prevention.
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Payne, Debbie Louise. "Creating community through collaboration and technology, a study of the collaborative process created to produce a provincial curriculum guide for the education of certified dental assisstants in British Columbia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0017/MQ49211.pdf.
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Moreira, Fernando César. "Utilização da tecnologia CAD/CAM no planejamento e tratamento ortodôntico de pacientes com má-oclusão de Classe I /." Araraquara, 2020. http://hdl.handle.net/11449/192046.
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Orientador: Luis Geraldo VazResumo: Os sistemas CAD/CAM têm auxiliado ortodontistas no planejamento e posicionamento de braquetes com o objetivo de minimizar os erros e melhorar a qualidade do tratamento. Este estudo teve como objetivo validar as mensurações realizadas no software do sistema eXceed™, avaliar a previsibilidade e as alterações dento-alveolares. A amostra foi composta por 24 adultos jovens, portadores de má-oclusão Classe I de Angle. Foram obtidas Tomografia Computadorizada de Feixe Cônico (TCFC) antes e após o tratamento para avaliar as alterações dento-alveolares. Modelos de gesso foram obtidos por moldagens das arcadas com alginato e posteriormente digitalizados por meio de um escâner de mesa 3Shape R700 (3Shape Dental System™, Copenhague, Dinamarca). Os modelos 3D foram convertidos em estereolitografia (.stl) pelo OrthoAnalyser™ e exportados para a plataforma eXceed™ para o planejamento e criação do setup virtual. Dispositivos de colagem indireta foram fabricados a partir dos modelos 3D com as informações da posição idealizada dos braquetes sobre o modelo virtual. Os pacientes foram submetidos ao tratamento ortodôntico com aparelho fixo e braquetes autoligados. Os modelos 3D dos setups digitais iniciais foram comparados com os modelos digitais dos casos tratados (após o completo alinhamento e nivelamento das arcadas com o fio de aço .019”x.025”). As mensurações lineares realizadas em ambos os grupos pelo software Geomagic® foram avaliadas empregando-se o sistema de classificação do American Bo... (Resumo completo, clicar acesso eletrônico abaixo)
Doutor
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Kenny, Catherine J. "Meta-Analysis of Entrance Standards for Undergraduate Nursing and Selected Allied Health Programs." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1284583045.
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Лахтін, Юрій Володимирович, Юрий Владимирович Лахтин, Yurii Volodymyrovych Lakhtin, Павло Олександрович Москаленко, Павел Александрович Москаленко, Pavlo Oleksandrovych Moskalenko, Людмила Вікторівна Галич, et al. "Використання сучасних технологій візуального навчання при викладанні стоматологічних дисциплін." Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/64725.
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Особливістю підготовки майбутнього лікаря-стоматолога є готовність до самостійної професійної діяльності в амбулаторно-поліклінічних установах безпосередньо після закінчення вузу. При реалізації компетентнісного підходу в освітньому процесі необхідно використовувати різні методи при вивченні дисциплін професійного циклу. Одна з вимог до умов реалізації основних освітніх програм на основі освітніх стандартів є широке використання в навчальному процесі активних та інтерактивних форм проведення занять з метою формування і розвитку професійних навичок і компетенцій студентів. Серед таких форм проведення занять є використання аудіовізуальних засобів. Ці засоби призначені для подання зорової та слухової інформації.
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Ondrová, Martina. "Design dentálního panoramatického rentgenu s 3D zobrazením." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444989.
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The topic of this thesis is the design of dental X-ray. User problems were identified based on the design and technical analysis for which solutions are presented in the work. The innovative shape and design solution shows a new approach to dental X-rays. The main benefit of the design is the solution to real ergonomic problems that can occur during the interaction of the operator or patient and the device. The design corresponds to current trends in the evolving design field of medical design.
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Hanson, Kami M. "The Utilization of Mixed-Reality Technologies to Teach Techniques for Administering Local Anesthesia." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/850.
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The ability to perform local anesthesia on dental patients is an important clinical skill for a dental hygienist. When learning this procedure in an academic situation, students often practice on their peers to build their skills. There are multiple reasons why the peer practice is not ideal; consequently, educators have sought the means to simulate the practice of local anesthetic procedures without endangering others. Mixed-reality technologies offer a potential solution to the simulated procedure problem. The purpose of this research was to determine if students could learn the techniques for providing local anesthesia using a mixed-reality system that allows them to manipulate 3D objects in virtual space. Guiding research questions were: In what ways do using 3D objects allow for a greater understanding of anatomical, spatial, and dimensional acuity? Will students develop conceptual understandings regarding the application of anatomical and technical concepts through iteration? Will students demonstrate the proper technique and verbalize a level of confidence for administering local anesthesia after using the mixed-reality system? Design-based research methods allowed for multiple iterations of design, enactment, analysis, and redesign. The first iteration focused on building a knowledge base for designing and developing virtual reality technologies for use in dental hygiene education. The second phase of research increased in technical sophistication and involved a virtual system that allowed for student interaction and manipulation of 3D objects. The interactions supported students' learning through the association of anatomical, spatial, and dimensional acuity. Built-in learner prompts promoted the understanding and identification of anatomical landmarks for performing an injection for the lower jaw. Further, the system promoted self-controlled practice and iterative learning processes. Redesign and development in the final iteration focused on design improvements of the system that included an output metric for assessing student performance, a data glove, and a marker to assist in following student interactions. Results support that students learned "while doing" in a specific immersive environment designed for dental hygiene education and they increased their level of confidence for performing a specific procedure.
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Reed, Alexander Ryan. "The role of technology denial in nuclear nonproliferation." Connect to Electronic Thesis (CONTENTdm), 2010. http://worldcat.org/oclc/643295978/viewonline.
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Zanin, Alice Aquino. "Análise da aplicação das tecnologias digitais de informação e comunicação à Disciplina Odontologia Forense." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/23/23153/tde-24082017-135144/.
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O uso de tecnologias digitais de informação e comunicação tem alterado a sociedade e seu emprego tem estimulado o debate na esfera pedagógica. A incorporação de tecnologias na educação pode ser considerada uma ferramenta facilitadora para transmissão de conhecimento ao aluno. O objetivo deste estudo de caso é identificar os desafios encontrados e as propostas de superação apresentadas. Buscou-se ainda analisar a satisfação e a usabilidade do ambiente virtual de aprendizagem (AVA) e dos materiais didáticos nele disponíveis, experimentados pelos alunos da graduação na Disciplina Odontologia Forense, na Faculdade de Odontologia da Universidade de São Paulo (FOUSP), dos cursos integral e noturno, no primeiro semestre de 2016. A tecnologia utilizada foi o software Moodle (\"Modular Object-Oriented Dynamic Learning Environment\"), onde foram depositados os objetos de aprendizagem: apostilas, vídeos, questionários e jogos. Participaram da pesquisa 113 estudantes. Como fonte de dados foram utilizados o grupo-focal, o questionário online semi-estruturado e os relatórios de logs do Moodle. Os dados foram analisados quantitativamente (análise descritiva) e qualitativamente (análise de conteúdo) e os resultados foram triangulados. Os desafios encontrados pelos alunos foram: dificuldade em acessar o AVA pelo celular; sobrecarga da estrutura curricular; não haver cobrança e lembretes para realizar as atividades online; desconexão entre a aula presencial e o ambiente virtual; haver mais de um site utilizado pelas disciplinas da faculdade. Em relação ao material didático, as atividades foram as mais visualizadas, com 1309 visualizações em média, seguida das apostilas (n=230), e dos vídeos (n=122). Os alunos sugeriram que tivesse mais atividades práticas no ambiente virtual. Para eles a realização de atividades no AVA foi importante para a fixação do conteúdo e para identificar eventuais dificuldades na aprendizagem (n=98%). As melhorias propostas, e concretizadas, foram no sentido de superar os desafios citados, ou seja, utilização da versão mobile do Moodle, diminuição da carga horária presencial e notificação de prazos e de atividades via redes sociais e correio eletrônico. Esta pesquisa demonstra a importância de ouvir os alunos durante o processo de ensinoaprendizagem para ajuda-los nas dificuldades encontradas e para que sejam estimulados a buscar o conhecimento. Demonstra também que o uso da tecnologia na educação é uma ferramenta facilitadora da aprendizagem, com alto nível de satisfação dos alunos.The use of digital information and communication technologies has changed society and its employment has stimulated the debate in the pedagogical area. The incorporation of technologies in education can be considered a facilitating tool for transmitting knowledge to the student. The aim of this case study is to identify the challenges founded and the overcoming proposals presented, and to analyze the satisfaction and usability of the virtual learning environment (VLE) and of the teaching materials available there, in the University of São Paulo, School of Dentistry, of the integral and nocturnal courses, in the first semester of 2016. The technology used was Moodle (Modular Object-Oriented Dynamic Learning Environment), where the learning objects, such as workbooks, videos, questionnaires and games. 113 students participated in the study. The focus group, the online semi-estructured questionnaire, and the Moodle\'s log reports were used as data sources. Data were analyzed quantitatively (descriptive analysis) and qualitatively (content analysis), and the results were triangulated. The challenges encountered by the students were: difficulty in accessing the VLE through the cell phone; overload of the curricular structure; there are no charges and reminders for online activities; disconnection between the classroom and the virtual environment; more than one site used by college subjects. Regarding teaching material, activities were the most visualized, with 1309 views on average, followed by workbook (n = 230), and videos (n = 122). The students suggested that they had more practical activities in the virtual environment. For them, the VLE activities were important for determining the content and for identifying difficulties in learning (n = 98%). The proposed and implemented improvements were aimed at overcoming the aforementioned challenges, namely, the use of the mobile version of Moodle, the reduction of classroom hours and the notification of deadlines and activities via social networks and electronic mail. This research demonstrates the importance of listening to students during the teachinglearning process to help them in the difficulties encountered and to be stimulated to seek knowledge. It also demonstrates that the use of technology in education is a facilitating tool for learning, with a high level of student satisfaction.
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Banerjee, Anirban. "Development of an automated electrogustometer." Thesis, University of Sussex, 2011. http://sro.sussex.ac.uk/id/eprint/6957/.
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In spite of electrogustometry having been in existence since the 1930s, there is no state of the art instrument to assess the electrogustometric threshold. A state of the art electrogustometer has been designed and constructed and tested for reliability and repeatability. This is based on embedded digital technology and is a semi-automatic, battery-powered portable instrument. Physical factors such as electrode area and stimulus duration affect the taste threshold but there are no recommended standards for these factors. Studies have been conducted to ascertain a recommended standard – a circular stainless steel electrode area of 28.5 mm2 and a stimulus duration of 2 seconds. While performing the test-retest assessment of the Sussex Electrogustometer, the new instrument, an anomaly was observed. Upon further investigation it was concluded that it was caused by alcohol consumed by a subject prior to the retest. Elaborate experiments were designed with the help of a neurologist and psychologist to understand the immediate effect of alcohol on taste for non-alcoholics. The results indicated an immediate improvement of taste for lower concentrations of alcohol and a delayed improvement for higher concentration. The studies were extended to understand the immediate effect of anaesthetics and smoking on taste which showed that taste deteriorated as expected. The new machine was used successfully in the clinical environment by local doctors and a report on their findings has also been included within this thesis.
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Rathi, Nakul H. "Comparing the Accuracy of Intra-Oral Scanners for Implant Level Impressions Using Different Scanable Abutments." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407200647.
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Ali, Khaled Abedela Mahdi. "Application of zirconium-coated titanium wires as restorative orthodontic materials." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/1532.
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Thesis submitted in fulfillment of the requirements for the degree
Magister of Technology: Dental Technology
In the Faculty of Health & Wellness Sciences
At the Cape Peninsula University of Technology
2013Orthodontic archwires are made from different alloys. It is now possible to match phases of treatment with orthodontic archwires according to its mechanical properties. On this basis, the titanium molybdenum alloys (TMA) in its beta phase have an excellent combination of strength and flexibility when used as archwires to apply biomechanical forces that affect tooth movement. It has recently gained increased popularity in orthodontic treatment. There are, however, disadvantages associated with the use of orthodontic archwires, such as high surface roughness, which increases friction at the archwire-brackets interface during the sliding process. The surface roughness of dental materials is of utmost importance. Properties such as desirable tensile strengths, load deflection, hardness and low modulus of elasticity and resistance against corrosion & wear determine the area of the contact surface, thereby influencing the friction. The main object of this study was to improve the strength and surface roughness of the beta-titanium orthodontic archwires (β-Ti III) and timolium archwires (TIM), taking into account of retention of the archwires strength. The following tasks were performed. Layers of Zr were deposited on the β-Ti archwires and compared with the archwire strength before and after Zr deposition. The structure of selected archwires and its composition and surface roughness was investigated before and after Zr deposition, using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The force of selected archwires before and after deposition with layers of Zr by Hounsfield deflection testing was studied. Two commercially available orthodontic archwires were used in this study, namely, β-Ti III and TIM orthodontic archwires. The archwires were cut into 25 mm long specimens. In this study, the electron beam-physical vapour deposition (EB-PVD) technique was applied to deposit pure Zr (thicknesses of 5, 10, 25 and 50 nm) on selected archwires and the effects thereof were investigated using AFM, SEM and the Hounsfield deflection test. Results of SEM and AFM analysis and deflection tests showed significant differences between Zr-coated archwires compared with uncoated archwires. Zr-coated archwires (5, 10, 25 and 50 nm depositions) had reduced surface roughness compared with uncoated archwires. A high load deflection rate was exhibited by the coated β-Ti III archwires and a low load deflection rate was exhibited by the coated TIM archwires. There was a difference in load deflection rate between the coated and uncoated archwires. Deposition of 5, 10, 25 and 50 nm Zr on both types of β-Ti orthodontic archwires is recommended for even sliding mechanics due to resulting reduced surface roughness with a good load deflection rate compared with uncoated β-Ti orthodontic archwires. KEYWORDS Surface roughness Zirconium Titanium Deflection test Beta titanium orthodontic archwires Orthodontic archwires alloys Coated materials Electron beam-physical vapour deposition Scanning electron microscopy Atomic force microscopy
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Skea, Denise Angela. "Perceptions of the professionalization of dental technology." Thesis, 2010. http://hdl.handle.net/10321/598.
Full textAbstract:
Submitted in fulfilment of the requirements of the Degree of Master of Technology: Dental Technology, Durban University of Technology, 2010.This study investigates the perceptions of dentists, dental technicians and dental patients with regard to the professionalization of dental technology as it is currently constituted in South Africa. The origin of dental technology worldwide lies in a trade and has historically been performed by craftsmen under the instruction of dentists. In South Africa during the early 1900s dental technology was practised in much the same way but the need for formalization of this field had been recognised. By 1945 dental technology was regulated by the Dental Mechanicians Board, which enabled only registered technicians to practise dental technology within South Africa. This field continues to be practised similarly at present. In order to establish the professional development of dental technology it is necessary to consider this field within a framework of desired professional attributes. This framework is provided by Greenwood (1957), who defines a profession by the following five attributes: systematic theory, professional authority, community sanction, ethical codes and a professional culture. Owing to the varied implementation and regulation of dental technology worldwide, little research into the professionalization of this field has been conducted to date. For the purpose of this study, dentists, dental technicians and dental patients in KwaZulu-Natal were interviewed in semi-structured interviews. The main themes emerging from this study were identified and considered with reference to the framework within which this study has been positioned. This study concludes that dental technology, as it is currently constituted in South Africa is perceived to be a profession by dentists, dental technicians and dental patients. .The term profession, however, is poorly understood by all three sample groups. Despite being considered a profession, dental technology is not considered to encompass all the attributes of a profession. Dental technology is therefore identified as a developing profession that positions this field somewhere along the professionalization continuum between a profession and a business.
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Fan, Chen-Hung, and 范振洪. "Dental Medical Service Innovation with Digital Technology." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/33p2xy.
Full textAbstract:
碩士國立臺灣大學
工業工程學研究所
106
Dental service was totally transformed since the Millennium. Not only through the progress of bio-materials and apparatus, more drill into oral-biology, but also that patient has look for modern methods of precise medicine in dental therapy, which accelerate the revolutionary trend while the digital techniques were introduced into high end dental therapy system. Taiwan is known for her excellent medical and high-tech professionals. Clinical researches and the quality of treatment were rated the top of the world. From 1995 the National Health Insurance set a nation-wide foundation of data collection to develop custom-made medical treatment. If we could combine our leading techniques in semiconductor and 3C manufacturing with dental and medical industries, these would be the best way to conduct digital dental medicine ahead of the world. This study aims to examine longitudinal development of dental treatment that follow advanced medical systems, and the digitized evolution of dental medicine therapy and business model. Literature reviews and interview with leading professionals reveal that digital evolution has already applied onto various hierarchy of dental services. We could cross-link various field of industries and alter the economic trend, thus transforming dental healthcare industry into international business. The findings were summarized as the following statements, the core ability of dental service combines digitization and alliance business strategy would enhance industrial link and attract people from nearby countries to search for high quality dental service. The key determinants are (a) digital enhancement of dental service; (b) medical and dental delivery system reform; (c) updated legislation; and (d) hospitals and basic dental services strategic alliance.
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呂宗岳. "A Study of in Dental Technology Firm Stoff Training." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/3y4r57.
Full textAbstract:
碩士逢甲大學
經營管理碩士在職專班
102
With the advent of the 21st century, the world economic environment constantly changes, people&;#39;s diet from the early simple, plain into a rich, sophisticated, resulting in people&;#39;s teeth shorten the life ahead, the government in 1998 began to apply for Professional and Technical Special Examination System , will become increasingly specialized division of oral health, so early tooth mold being able to work as: dental technician, dental laboratory legally established, in addition to operating dental technology with professional skills and certification, businesses still have practical experience dental technician tie, the team to maintain the growth and competitive advantage. This study suggests that effective staff development to improve work processes must be developed before the implementation of education and training, and mentoring to build cognitive function in social situations, so that experience, technology can be passed, with the institutionalization of job preparation can reduce training costs, in education and training process to promote learners, senior diagnosing the problem, reflect errors in order to enhance their competitiveness. Also expect the future to engage the relevant staff of dental medicine, when entering this field to adapt to the characteristics of its industry in a timely manner in line with the business; you can make dental technology and sustainable development.
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Hoang, Sean Long, and 黃天龍. "Dental Implant Technology Clustering and Technology Life-span Analysis Using Ontology-based Patent Intelligence." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/96687484376744104158.
Full textAbstract:
碩士國立交通大學
管理科學系所
100
ABSTRACT Rapid technology development shorter product life cycle, fierce competition in the marketplace, establishes patent analyses are an important strategic tool for R&D management. This thesis develops a technology clustering and life-span analysis framework based on data mining techniques to help companies effectively and rapidly gain domain-specific knowledge and technology insight. In addition, patent documents contain complex terminologies which require experts to perform patent analysis. This research applies patent analysis methodologies to create domain-specific ontologies. The advantage of using an ontology is that it contains specific domain concepts and helps researchers to understand the relationships between concepts. In addition, ontologies are used to effectively extract domain knowledge, cluster patents and create graphs for tend recognition. Life-span analysis of technology clusters helps companies to gain a quick snapshot of their own patent portfolio and identify potential technology clusters for investment. This thesis proposes the process of knowledge extraction for domain-specific patents using patent analysis methodologies which improve domain-knowledge understanding. The methodologies proposed in this research include key phrase analysis, patent technology clustering, patent document clustering, domain-specific ontology, and life-span analysis. With these methodologies, companies quickly derive domain-specific ontologies to help R&D engineers relate data and increase understanding of a specific domain and the relationship between concepts. Life-span analysis helps companies’ direct strategic R&D plans and evaluates the timing of investments using the methodologies proposed in this research. The validity and reliability of the methodology are tested by studying the application of a set of dental implant patents. Keywords: Dental implant, ontology, key phrase analysis, clustering, life-span analysis
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Dlamini, Philiswa Charity. "The factors associated with student recruitment and student profiles in Dental Technology at a University of Technology." Thesis, 2017. http://hdl.handle.net/10321/2902.
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Submitted in full compliance with the requirements for the Master of Health Sciences in Dental Technology, Durban University of Technology, Durban, South Africa, 2017.With the transformation in Higher Education (HE), the number of Black African students entering South African universities increased significantly (72%). Black African students accounted for 77.38% of the total student population at Durban University of Technology (DUT). It has been noted that the majority Black African students in HE are first-generation students, many are under-prepared, and come from low-socioeconomic backgrounds. Students from this racial group tend to make incorrect career choices due to a lack of knowledge, experience, and adequate vocational guidance and career counselling. To add to this, many University of Technology programmes, such as Dental Technology, are vocational in nature and prepare students for unfamiliar industries. The aim of this study is to determine the factors associated with student recruitment practices and student profiles in the Dental Technology programme at the DUT. This cross-sectional study employed a mixed method approach. An online survey recruited Dental Technology students who entered the programme from 2008 to 2012. The students’ demographic information was retrieved from the Management Information System (MIS) Department. The survey generated categorical data, which was analysed using the SPSS (Statistical Package for the Social Sciences) which included frequencies, cross-tabulation, Chi-Square test, and Spearman's Rank Order Correlation. Semi-structured interviews with Dental Technology lecturers and the staff involved in student recruitment practices generated qualitative data which was analysed using QSR NVIVO 10. Common themes were classified and discussed. The findings showed that 75% of Dental Technology students were Black African. Only 28% came from urban areas and 81.4% of students attended government schools. Furthermore, 60% relied on financial aid for the payment of their tuition fees. Two categories of necessary attributes emerged i.e. general attributes for an HE student (intrinsic qualities e.g. passion, positive attitude) and the practice specific attributes for Dental Technology (e.g. good eye-hand coordination, manual dexterity). However, the academic staff indicated that the programme is not attracting its desired students. Added to this, is the fact that from the 2008 – 2012 initial intake of 157 students, 41% dropped out of the programme. According to Dental Technology staff, there are no programme-specific student recruitment practices, and they rely on the institutional recruitment practices. However, qualitative findings showed that the DUT employs a generic approach which includes branding and direct promotion with academic departments only minimally involved, reducing the likelihood of effectively recruiting desired students for specific academic programmes such as Dental Technology. About 83% of students indicated that they had not been exposed to any of the DUT’s recruitment practices while they were still in high school. With these findings, it can be concluded that the association between the profiles of the student participants and the current student recruitment practices in the Dental Technology programme is incongruent and weak. In essence when students are recruited to enrol in academic programmes in an institution there needs to be a strong relationship between academic departments and the staff members responsible for recruiting students as the academic staff members are better able to clearly explain the intricacies of their respective programmes and they have an accurate understanding of their desired students. The student recruitment personnel are equipped to sell or market the institution and its offerings to prospective students, but there is clearly a need for the Dental Technology programme to pay more attention to the manner in which their students are recruited and retained. This will help to improve the programme's pass rates and dropout rates while addressing the issues of access, equity, diversity.
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Mukena, Martha Mutinta. "Perceptions of Zambian dentists and dental technicians in respect of dental technical services." Thesis, 2010. http://hdl.handle.net/10321/597.
Full textAbstract:
Thesis submitted in full compliance with the requirements for a Master's Degree in Technology: Dental Technology, Durban University of Technology, 2010.This study is an evaluation of the perceptions of Zambian dental technicians and dentists of the dental technological services offered in Zambia. Zambia is a small nation (land size of 752,614km²) with a population of approximately 11,000,000. Patients needing oral restorative treatment have two options available to them; they seek treatment in state hospitals or through private practices. Access to prosthetic treatment is difficult due to the difficulties associated with obtaining treatment from the state as well as there being very few privately owned dental laboratories. Dental technology in Zambia dates back to 1964 and since its inception there has been no evaluation as to whether the services offered are adequate and satisfactory. The aim of this study was to; Provide insights into the understanding of dentists and technicians regarding dental technical services. Provide insights into available dental technical services with the aim of assisting in developing future guidelines for provision of such services in Zambia. Identify national oral health objectives and make suggestions for the improvement and development of the services in Zambia. This aims of the research are relevant as the research was conducted at a time when the nation is undergoing a general introspection of service delivery. Data was collected through the medium of semi-structured personal interviews with registered and practicing dentists and technicians in the main cities of Zambia that include Lusaka, Ndola and Kitwe. Their views were transcribed and coded according to significant themes that emerged for data analysis. ii The results indicate that there is reason to be concerned about the general quality of service delivery. In addition, the study showed that the working relationships between technicians and dentists require improvement. Moreover, the study established that Zambia has a critical shortage of skilled technicians and particularly ceramic technicians and ceramic dental laboratories. The data also revealed concerns that little attention by government policymakers is being afforded to dental technical services whilst attention is paid rather to clinical dental services. As a result, state owned laboratories suffer from a lack of adequate and functioning equipment as well as a lack of quality dental materials. Finally, the study showed that Zambia has no clear direct oral health policies that govern the dental technical services.
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Huang, Kuan-Chieh, and 黃冠傑. "A Study of International Marketing Strategy in Dental Technology Industry." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/regeac.
Full textAbstract:
碩士國立臺北科技大學
管理學院經營管理EMBA專班
100
In recent years, dental technology has received more attention. Amid intense competition, it has become increasingly important for biomedical companies to find their niche in the industry. To develop effective marketing strategies, the present study sets out to investigate the demand of the industry. In Taiwan, dental technology is operated by small or medium enterprises and the market is limited. Since there is a lack of knowledge in global marketing strategies, Taiwanese companies tend to promote their products by slacking prices. Through the analysis of the market and case study, the present study intends to raise the awareness of those enterprises involved in the dental technology industry and to facilitate their understanding of their strengths and the demand of the market. It is hoped that a new business model may be constructed and the goal of sustainable operation and internationalization may be realized.
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Tseng, Chung-chih, and 曾崇智. "A research of information technology import into dental practice management." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/52622918342537220160.
Full textAbstract:
碩士國立中山大學
高階經營碩士班
103
With the advent of the digital era, it has become a global trend for medical institutions to incorporate information technology into their practices. Not only can information technology improve the efficiency and quality of health care, it also helps the institutions control health care costs and make it more convenient for them to manage the mass quantity of medical-related data. Taiwan has a sound and world-renowned health care system. Under the protection of this system, patients in Taiwan can enjoy high-quality medical care without spending huge medical expenses. However, the situation is changing. In response to the adjustment of government’s health care policies and the changing needs of patients, medical institutions continually upgrade and expand. What follow is the increasing cost of health care and the increasing complexity of the operating environment in medical institutions. Based on these premises, this thesis analyses how information technology is incorporated into dental treatments. It discusses how the medical institutions digitalize all the information and medical records, or further introduce cloud service into their institutions, so that the medical personnel can gain access to necessary information without the limitation of time and space. In addition to accelerate decision-making process, this new technology greatly reduces human error and the waste of medical resources. This thesis looks into how the information technology helps improve the efficiency of a medical institution and how it influences the medical personnel in dentistry from three different aspects: Medical Personnel, Medical Equipment, and Patient. Respectively, it compares and analyzes current digital dental products for clinical practice, such as: Interactive Multimedia Learning Network for Dentists, Dental Surgery Simulation System, Digital Impression Cloud System for Dental Technicians, Digital Dental Image Management System, Digital Dental Correction System, Digital Periodontal Probe, Dental CAD / CAM Systems, Digital 3D Dental Implant Guidance Systems, Digital Oral Pathology Testing, Interactive Sing-in APP for Patients, and so on. This thesis concludes that the dental industry has been improved with the introduction of new digital technology. It also points out that the customers in Taiwan pay more and more attention to their dental health in recent years. The customers care not only the traditional dental treatments, but also the dental care for cosmetic reasons. Under these circumstances, there are more and more cases in dental institutions that need the assistance of high technology. The traditional, manual way of management will no longer meet the expectations of the new generation of customers today. Therefore, it becomes extremely important to introduce information technology into the management of dental industry in order keep up with its future progress.
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Huang, Chun Shih, and 黃俊士. "Applications of RFID Technology in Information Systems for Dental Laboratories." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/45415126151859972625.
Full textAbstract:
碩士長庚大學
管理學院碩士學位學程在職專班資訊管理組
100
The Radio Frequency Identification (RFID) technology provides capabilities for automation of object identification. The technology has a wide range of application in not only the monitoring of logistics transportation, but also in integration of manufacturing processes. This study focuses on the possibility and benefits of applying the RFID technology to process reengineering for dental laboratories, where dental impressions and artificial teeth are manufactured according to order from dentists. This study first reviews the operational processes from user’s perspectives and analyzes the mutual effects between order management, production of dental impressions and artificial teeth, and distribution of the manufactured objects, i.e. the dental impression and the artificial teeth shipped to the dentist clinic. . The Rational Unified Process (RUP) is the formal methodology conducted in this stage. Next, Unified Modeling Language (UML) , a common approach to information systems analysis and design, is adopted to devise reengineered processes using RFID tags and equipment. The result of this UML step provides a basis for prototyping an information system with the capability of object identification automation using RFID. This study further accumulates data on manufacturing and distribution times for some selected steps after the new system was implemented. The time used in recording a dental impression manufactured according to an order was reduced 97 %, while the time used in preparation for shipping to the dentist clinic is reduced 87 %. In the aspect of order receiving and recording, the improvement on time efficiency is less significant. In summary, this study describes an example that demonstrates the use of RFID in object identification automation for dental laboratories; as a result, the burdens on workforce and human-induced errors are also substantially reduced.
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Le, Roux Andre Rayne. "The performance of base metal ceramic alloy restorations with reference to variances in thickness in metal and porcelain in order to establish optimal thickness ratios to maxize strength and aesthetic characteristics." Thesis, 2000. http://hdl.handle.net/10321/1909.
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Dissertation submitted in compliance with the requirements for the Master's Degree in Technology: Dental Technology, Technikon Natal, 2000.The greatest problem in maximizing strength and aesthetic characteristics of metal ceramic restorations arises when there is a lack of available space to allow sufficient thickness of metal alloy and porcelain. This generally results in the metal alloy being reduced to its minimum to allow adequate porcelain thickness. The minimum thickness to which noble metal alloys can safely be reduced, is generally accepted to be 0.3 mm due to previous clinical time-dependent trial and error. Agreement regarding the minimum thickness to which base metal alloys can safely be reduced is still under dispute possibly because base metal alloys have not had the same duration of clinical exposure. The objectives of the present study were: 1. To determine the influence thickness variations of the base metal alloy would have on strength characteristics of metal ceramic restorations and thereby establishing the minimum thickness to which base metal alloys can safely be reduced. 2. To determine the influence thickness variations of porcelain would have on strength and aesthetic characteristics of metal ceramic restorations and thereby establish the minimum thickness to which the porcelain thickness can safely be reduced. 3. To determine which base metal alloy to porcelain thickness ratios would be most suited in order to maximize strength and aesthetic characteristics in metal ceramic restorations where the amounts of available space for the alloy and porcelain are varied. For objective (1) Tensile strength tests to determine and compare the ability of various alloy thickness to resist porcelain fracture were performed in Newtons. For objective (2) Tensile tests to determine and compare the ability of various porcelain thickness to resist porcelain fracture were performed in Newtons.
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Somers, Grant Brandon. "An evaluation of the colours of base metal alloy oxide layers, and its effects on the shade of base metal alloy metal-ceramic restorations." Thesis, 1997. http://hdl.handle.net/10321/1979.
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Dissertation submitted in compliance with the requirements for the Master's Degree in Technology: Dental Technology, Technikon Natal, 1997.Globally, difficulties are being experienced by the dental world to match manufactured prosthetic restorations with natural tooth colour. The primary objective of this study was therefore to evaluate the colour of five different metalceramic base metal alloy oxide layers, and the effects of each oxide layer on the shade of the porcelain applied to its surface. The increase in the cost of gold alloys in the dental industry has influenced manufacturers to provide alloys which are cost effective and have adequate mechanical properties for the manufacture of metal ceramic restorations. Five base metal alloys used in the fabrication of metal-ceramic restorations were selected. The selection of the base metal alloys was based on popularity in the industry, availability and cost. The following five base metal alloys were selected for the investigation: Wiron 99 (nickel-chrome) Ceradium V (nickel-chrome-beryllium) Remanium CD (nickel-chrome) \x95 Wirobond (cobalt-chrome) Heranium (nickel-chrome) Bond-on-4 (low noble content alloy {control group; which was gilded}) II Thirty specimens for each alloy group (180 in all) were cast, using the lost wax technique. Three ceramic layers (notably the opaque, dentine and a glaze layer) were applied to the 20mm in diameter surface of each specimen. .\xB7t Finally both sample groups were tested against a custom shade guide the colour being compared specifically with the Vita A 1 shade. The reason for the inclusion of the shade guide was that, clinically, most shade selections are made by comparing the patient's tooth shade with a manufactured shade guide. A wide selection of shades are available to the ceramist. A certain school of thought that recommends that the metal surfaces of semi-precious metals be gilded with a gold gilding paste before the application of ceramics. in order to block out the dark oxide colour and enhance the colour of the ceramic to a more aesthetic and warmer colour. Therefore, prior to the opaque firing of the control group (Bond-on-4), a gilding layer of Spectra Seal Paste was applied to the surface of each specimen. Following each application of ceramic, the appropriate firing cycles were used to fire the ceramic. The following factors affected the selection of the shade of ceramic used in this study: the shade which is most influenced by the dark oxide layer the more popular shades of ceramic ( the A class of shades). It was established, through a review of the literature (Crispen, 1991), that the most objective form of testing colour at the time of the study, was the use of a reflectance spectrophotometer. This form of testing had been proved to be cost effective and was consequently used in this investigation. III Thesurve
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Mqadi, Nonhlanhla Precious. "Perceptions on the addition of clinical practice to the dental technology curriculum." Thesis, 2009. http://hdl.handle.net/10321/447.
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Submitted in full compliance with the requirements for a Master’s degree in Technology: Dental Technology at the Durban University of Technology, 2009.The Dental Technology profession in South Africa is currently undergoing a possible role transformation. In the past, Dental Technicians were restricted to laboratory work only and were not permitted to have direct contact with patients. Due to a demand for oral care, and a gap that is perceived to exist in service delivery, Clinical Dental Technology has emerged as a possible new profession in South Africa. The 1997 amendment to the Dental Technicians Act allows Dental Technicians to broaden their scope of practice through further education into the clinical aspects of the profession. South Africa is one of few countries that have an enabling legislation in terms of the recognition of Clinical Dental Technology. However, there is to date no training programme or curriculum for people who would like to practise as Clinical Dental Technicians. The three institutions in South Africa that provide training for Dental Technicians do not provide training to those technicians who would like to pursue a clinical career path. Internationally, Dentists have argued that Dental Technicians have insufficient clinical capabilities. They feel that technicians do not have sufficient knowledge and experience in dealing directly with patients, and consequently have identified a need for further training of Dental Technicians before they are recognised as Clinical Dental Technicians. The aim of this study was to evaluate educational institutions’ readiness in terms of the role transformation of Dental Technicians and to establish perceptions about the introduction of this new profession by Dentists, Dental Technicians and Dental Technology lecturers. The views of these three stakeholders have implications not only in terms of the development of a new curriculum, but were also found to raise serious concerns about the implementation of this profession in South Africa. Data was collected by means of questionnaires and personal interviews with Dentists, Dental Technicians and Dental Technology lecturers in South Africa. The responses were transcribed and then coded according to pertinent themes for interpretation purposes. The data revealed major differences in the perceptions of the proposed profession by the three sectors. This has important implications for the likely success of Clinical Dental Technology, given the need for these sectors to work together as members of the dental team. The data also reveals concerns about the type of training that would need to be incorporated into the curriculum and who would be able to provide such training. By using an overview of curriculum theory, this study also raises concerns that clinical aspects might be infused into the curriculum as simply the acquisition of additional technical skills, rather than as a significant shift in professional identity to incorporate patient care.