Academic literature on the topic 'Extracted teeth'

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Journal articles on the topic "Extracted teeth"

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Lee, Jason Jonghyuk, Anthony Nettey-Marbell, Archie Cook, Luiz A. F. Pimenta, Ralph Leonard, and André V. Ritter. "Using Extracted Teeth for Research." Journal of the American Dental Association 138, no. 12 (December 2007): 1599–603. http://dx.doi.org/10.14219/jada.archive.2007.0110.

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Pantera, EA, and GS Schuster. "Sterilization of extracted human teeth." Journal of Dental Education 54, no. 5 (May 1990): 283–85. http://dx.doi.org/10.1002/j.0022-0337.1990.54.5.tb02421.x.

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Beck, M. "Sterilization of extracted human teeth." Journal of Dental Education 54, no. 8 (August 1990): 498. http://dx.doi.org/10.1002/j.0022-0337.1990.54.8.tb02440.x.

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VerBrugge, K. R. "Sterilization of extracted human teeth." Journal of Oral and Maxillofacial Surgery 49, no. 1 (January 1991): 101. http://dx.doi.org/10.1016/0278-2391(91)90285-t.

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Bhat, Sham S., Nikita V. Lolayekar, and S. Vidya Bhat. "Disinfection Methods of Extracted Human Teeth." Journal of Oral Health and Community Dentistry 1, no. 2 (2007): 27–29. http://dx.doi.org/10.5005/johcd-1-2-27.

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ABSTRACT Extracted human teeth are routinely used for educational purposes in dental institutions. In recent years infection control guidelines have been revised due to the possibility of cross-contamination from these extracted teeth. This study was done to determine the efficacy of some commonly used methods for disinfection/sterilization of extracted human teeth.
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Omoregie, FO, BDO Saheeb, MA Ojo, and O. Odukoya. "Periapical granuloma associated with extracted teeth." Nigerian Journal of Clinical Practice 14, no. 3 (2011): 293. http://dx.doi.org/10.4103/1119-3077.86770.

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Inne, S. Sasmita, Oscandar Fahmi, and H. Effendi Novita. "Blood type determination from extracted deciduous teeth." Journal of Dentistry and Oral Hygiene 6, no. 4 (July 31, 2014): 39–45. http://dx.doi.org/10.5897/jdoh2014.0114.

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Ali, Riaz, Justin Bartholomew, Randolph Coffey, Caroline Carrico, Todd Kitten, and Parthasarathy Madurantakam. "Peracetic Acid: A Practical Alternative to Formalin for Disinfection of Extracted Human Teeth." Bioengineering 8, no. 12 (December 15, 2021): 217. http://dx.doi.org/10.3390/bioengineering8120217.

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Extracted human teeth provide the closest approximation to teeth in situ and play important roles in dental education and materials research. Since extracted teeth are potentially infectious, the Centers for Disease Control recommend their sterilization by autoclaving or disinfection by formalin immersion to ensure safe handling. However, autoclaving is not recommended for teeth with amalgam fillings and formalin is hazardous. The goal of the present study was to investigate the potential of peracetic acid (PA) as an alternative method to achieve reliable disinfection of freshly extracted teeth. A total of 80 extracted teeth were collected for this study. Whole teeth were incubated in one of four solutions for defined periods of time: sterile water (2 weeks), formalin (2 weeks), PA 1000 ppm (2 weeks), and PA 2000 ppm (1 week). After sectioning, the crown and root fragments were transferred into separate tubes containing brain–heart infusion broth and incubated at 37 °C under anaerobic conditions for 72 h. Absence of broth turbidity was used to assess effectiveness of disinfection. No turbidity was observed in any of the formalin-treated or peracetic acid-treated samples, signifying complete disinfection. Our results indicate that PA can effectively disinfect extracted human teeth, providing a reliable alternative to formalin and autoclaving.
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Abdul-Rahman, Ghada, Wiaam Al-Ashou, and Arjwan Shukur. "Disinfection of Extracted Teeth for Den-tal Researches." Al-Rafidain Dental Journal 10, no. 1 (August 1, 2010): 158–61. http://dx.doi.org/10.33899/rden.2010.8979.

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Yamamoto, Tatsuo, Akira Ishikawa, Yutaka Watanabe, Naoya Hirano, Yoshihiro Shibata, and Tatsuo Watanabe. "Prevalence of horizontal attachment loss in extracted teeth." Journal of Clinical Periodontology 31, no. 9 (September 2004): 791–95. http://dx.doi.org/10.1111/j.1600-051x.2004.00556.x.

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Dissertations / Theses on the topic "Extracted teeth"

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Sturgill, Riley B. "Prevalence and Clinical Characteristics of Teeth Extracted with a Diagnosis of Cracked Tooth: A Retrospective Study." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4820.

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The body of knowledge that exists regarding cracked teeth is limited. The purpose of this study was to determine the prevalence of cracks among extracted teeth. This retrospective longitudinal cohort study included patients of the Virginia Commonwealth University School of Dentistry that underwent extraction procedures over a 6 year period. The sample consisted of 20,408 patients and 40,870 teeth. Statistical analysis software was used to identify diagnoses of a crack, fracture, or split tooth prior to extraction of the tooth by analyzing the Electronic Health Record (EHR) (axiUm™, Version 6.03.03.1035, Exan Corporation, Vancouver, BC, Canada). There were 3,228 teeth identified as cracked in the 40,870 extracted teeth—an overall prevalence of 7.90%. The percentage of cracked teeth were compared using a chi-square test of homogeneity. The prevalence of cracked teeth varied according to tooth type (chi-square = 95.5, df = 7, p < .0001). Tukey’s multiple-comparison procedure identified the groups of tooth types with a significantly different cracked prevalence. The mandibular 2nd molar had the highest prevalence (9.72%). Age and gender were also significantly correlated with cracked teeth.
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Dippenaar, Alfred Meyer. "Utilising radiographic incisor crown markers to determine incisor inclination on headfilms an experimental study on extracted teeth /." Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-03022004-085319/.

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Lagerholm, Sara. "Isolation and Characterization of Mesenchymal Stem Cells from the Periodontal Ligament of Healthy Teeth." Thesis, Malmö universitet, Odontologiska fakulteten (OD), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19683.

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ABSTRAKT:Isolering och karaktärisering av mesenkymala stamceller från periodontalligamentet hos friskatänderSYFTE: Att isolera och odla celler från periodontalligamentet samt karaktärisera dem sommesenkymala stamceller.MATERIAL OCH METOD: Friska premolarer gjordes tillgängliga vid ortodontiskaextraktioner. Den mellersta 1/3 av periodontalligamentet skrapades varpå en enzymatiskmetod användes för isolering av individuella celler. Resulterande celler odlades understandardiserade metoder. Karaktärisering av celler skedde genom flödescymetri med 2 olikapaneler av cellyta markörer; en för etablerat positiva uttryck och en för kända negativauttryck hos mesenkymala stamceller. Möjlighet av celler att differentieras in vitro tilladipocyter och osteocyter testades genom tillförsel av specifika substanser till odlingsmediet.RESULTAT: Celler från 11 av 13 tänder isolerades och odlades framgångsrikt adherenta tillodlingsytan i upp till 8 generationer. Celluttryck av de positiva markörerna CD73, CD90 samtCD44 bekräftades genom flödescymetri. Inget uttryck observerades för den negativa panelenCD45, CD34, CD11b, CD19 eller HLA class II. Uttrycket av CD105 kunde inte fastställas pgaofullständigt data. Försök till differentiering av celler till adipocyter och osteocyter visade påfenotypiska förändringar efter 21 dagar.SLUTSATS: Den här studien har bidragit till framgångsrik isolering och delvis karaktäriseringav mesenkymala stamceller från periodontalligamentet hos friska tänder. En icke-invasivmetod av detta slag, resulterande i tillgång till denna cellpopulation utgör ett lovande verktygför framtida studier med goda möjligheter till ytterligare kunskap applicerbart till kliniskasituationer inom tandvården.
ABSTRACT:Isolation and Characterization of Mesenchymal Stem Cells from the Periodontal Ligament ofHealthy TeethAIM: To isolate and culture viable cells from the periodontal ligament and confirming theiridentity as mesenchymal stem cells.METHODS AND MATERIALS: Healthy premolars were collected at the time oforthodontic extractions. The middle 1/3 of the periodontal ligament was scraped andsubsequent cell isolation was performed using an enzymatic method; yielding single cellisolates. Cells were cultured and maintained under standard culture conditions. Cellcharacterization was performed by flow cytometry using two sets of cell surface markers; oneknown to be present and one known to be absent in mesenchymal stem cells. Ability of thecells for in vitro differentiation into adipogenic and osteogenic lineages was tested usingspecifically formulated media supplements.RESULTS: Cells were successfully isolated from 11 of 13 teeth and were maintained asadherent cultures for up to 8 generations. Cellular expression of positive markers; CD73, CD90and CD44 were confirmed by flow cytometry. For the negative marker panel, expression ofCD45, CD34, CD11b, CD19 and HLA class II were not detectable. The expression of CD105was inconclusive. As determined by phenotypic changes, cells appeared to have undergoneadipogenic and osteocytic differentiation at 21 days.CONCLUSION: This study has resulted in successful isolation and partial characterization ofmesenchymal stem cells from the periodontal ligament of healthy teeth. Non-invasive accessto these cells, provides an excellent tool for future studies, potentially leading to beneficialknowledge transferable to the dental clinical situation.
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Easterly, Danielle E. "An Investigation of Surface Characteristics of Enamel Treated with Infiltrative Resin: A Scanning Electron Microscopy Study." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4764.

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AN INVESTIGATION OF SURFACE CHARACTERISTICS OF ENAMEL TREATED WITH INFILTRATIVE RESIN: A SCANNING ELECTRON MICROSCOPY STUDY Danielle E. Easterly, Doctorate of Dental Surgery. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Dentistry at Virginia Commonwealth University. Virginia Commonwealth University. 2017. Director: Dr. Eser Tüfekçi D.D.S., M.S., Ph.D., M.S.H.A. Objective: To evaluate the microstructural changes of a resin infiltrant (ICON®, DMG America LLC, Englewood, NJ) after six months of simulated toothbrushing. Materials and Methods: Ten extracted third molars (n=10) were collected. Artificial white spot lesions were created and resin applied. Environmental SEM images at 250X and 500X were taken after application of Icon® (T1), and after six months of simulated toothbrushing (T2). Micrographs were evaluated for changes in surface characteristics. Results: SEM showed some changes in the surface characteristics of the resin after simulated toothbrushing. However, changes in presence of enamel rods, microcracks, or fractures were not statistically significant (p>0.05). The effects of polymerization shrinkage were noted on most samples in the form of clefts and fissures. Conclusions: Icon® resin seems to withstand challenge by toothbrush abrasion over a six-month period, with some evidence of microstructural wear.
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Lang-Hua, Bich Hue, and 梁許碧蕙. "Decision-making in dental treatment planning: to maintain or to extract compromised teeth." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B50534282.

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Background: A number of systematic reviews provide the basis for decision-making in treatment planning of the reconstruction of mutilated dentitions. This includes identifying teeth difficult to treat/save and decisions on replacement such teeth if extracted. Aims: 1) To assess attitudes of general dental practitioners (GDPs) in a community where provision of dental implants is a widely practiced treatment; and to determine variations in attitudes with respect to dentists’ factors, training factors and implant-provision factors (Study 1): and 2) To determine treatment decision making with respect to maintaining periodontally compromised teeth among dentists with and without postgraduate qualifications in implant dentistry (Study 2). Methods: Study 1:A cross-sectional survey was conducted on a random sample of registered dentists in Hong Kong regarding their attitudes towards implant dentistry with respect to (1) perceived superiority, (2) perceived outcomes, (3) perceived complications and maintenance issues and (4) placement issues. In addition, information was collected on dentists’ factors, training factors and implant provision factors. Variations in attitudes towards implant dentistry were explored. Study 2: A series ofpatient scenarios with varying degrees of periodontal disease levels was presented to selected dentists. Information on their decision-making outcomes, and their intention to retain compromised teeth was analysed in bivariate and regression analyses; accounting for postgraduate implant training, gender, years in dental practice and implant placement experience. Results: Study 1: Among eligible practitioners (n=246), the response rate was 46.3%. Most dentists’perceived implants to be superior to conventional prostheses for the replacement of a single missing posterior tooth (80%) and likewise, for the replacement of a single missing anterior tooth (67%). Variations in attitudes existed with respect to dentists’ factors: years in practice (p<0.05), place of graduation (p<0.05); implant training factors (p<0.05), number of days of training (p<0.05) and implant experience factors (p<0.05). Study 2:This study involved 30 dentists with postgraduate implant qualifications (GDPP), 33 dentists without postgraduate implant qualifications (GDP) and 27 dentists undergoing postgraduate training for implant qualifications (GDPT). Variations in treatment decision-making were evident between the three groups (p<0.05). Differences in treatment approaches to retaining compromised teeth were apparent(p<0.05). Furthermore, variations in rehabilitation of extracted scenarios existed in terms of use of implants and number of implants needed for rehabilitation. Accounting for dentist and practice factors in regression analyses, compared to GDP, GDPP/GDPT were three times as likely to retain periodontally compromised upper molars with painwith pain (OR 3.08, 95%CI 1.09, 8.14 p=0.03), or without pain (OR 3.10, 95%CI 1.04, 10.62 p=0.04). Conclusions: Study 1:In a community where provision of dental implants is widespread the attitudes of GDPs are not wholly in line with evidence-based knowledge. Variations in their attitudes exist with respect to dentist factors, training and experience issues. Study 2: Variations in treatment decision making with respect to retaining periodontally compromised teeth exist between dentists with and dentists without postgraduate training in implant dentistry. Furthermore, there are differences in their management approaches.
published_or_final_version
Dentistry
Master
Master of Philosophy
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Gordon, Ross. "Criteria to Maintain Periodontally-involved Teeth versus Extract and Replace with Implants: A Delphi Study." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1502792951637218.

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Cenicante, João Pedro Alves Valadas de Lima. "The use of autogenous teeth for alveolar ridge preservation : a literature review." Master's thesis, 2021. http://hdl.handle.net/10400.26/38444.

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Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Following a tooth extraction, a cascade of biological events will lead inevitably to a decrease in the height and width of the alveolar ridge, mostly on the buccal side and horizontally. In this sense, given how often this procedure is performed in dental practice, it is pivotal that every clinician is acquainted with these dimensional changes and its possible impact on future oral rehabilitation. Consequently, several treatment modalities, commonly known as Alveolar Ridge Preservation (ARP) are described in the literature and include: socket grafting, with the use of a bone graft material, guided tissue regeneration (GTR), with the use of a barrier membrane and finally guided bone regeneration (GBR) with the use both a bone graft material and a barrier membrane. Currently, there are several options for bone graft materials available to the clinician, comprising autografts, allografts, xenografts and alloplasts, having each its advantages and drawbacks. The biological plausibility regarding the use of these biomaterials is that thanks to biological properties intrinsic to the grafts, the alveolar ridge resorption would decrease. In the past decade, the use of autogenous teeth as a bone graft material has been described with encouraging results, nevertheless, describing distinct preparation protocols prior to the ARP procedure. Therefore, this literature review aims to summarize all the evidence regarding the use of autogenous teeth as a bone graft material in ARP in post-extraction sockets, its several preparation protocols, efficacy and future perspectives.
Após qualquer exodontia, uma série de eventos biológicos conduzem inevitavelmente a uma redução ao nível da altura e largura do rebordo alveolar, principalmente na componente vestibular e horizontalmente. Desta forma, dada a frequência com que este procedimento é realizado na Medicina Dentária, é fulcral que qualquer clínico esteja informado destas alterações dimensionais e possível impacto numa futura reabilitação oral. Consequentemente, diversas opções de tratamento, vulgarmente conhecido como Preservação da Crista Alveolar (PCA) foram descritas incluindo: regeneração óssea, através do uso de um enxerto ósseo, regeneração tecidular guiada (RTG), através do uso de uma membrana barreira e ainda regeneração óssea guida (ROG) com o uso de um enxerto ósseo associado uma membrana barreira. Atualmente, existem diversas opções de enxertos ósseos disponíveis para o clínico, compreendendo autoenxertos, aloenxertos, xenoenxertos e aloplásticos, tendo cada um vantagens e limitações. A plausabilidade biológica destes biomateriais pode ser explicada devido a propriedades biológicas intrínsecas ao enxerto ajudando a minimizar a reabsorção óssea. Na última década, o uso de dente autólogo como substituto ósseo tem sido descrito com resultados encorajadores, contudo, descrevendo protocolos de preparação distintos antes de realizar a PCA. Desta forma, esta revisão de literatura procura resumir a evidência disponível relativamente ao uso de dente autólogo como substituto ósseo na PCA em alvéolos pós-extração, os diversos protocolos de preparação, eficácia e perspetivas futuras.
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Dippenaar, Alfred Meyer. "Utilising radiographic incisor crown markers to determine incisor inclination on lateral headfilms - and experimental study on extracted teeth." Thesis, 2003. http://hdl.handle.net/2263/22912.

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Inaccuracy in landmark identification is regarded as the most important source of error in cephalometry. Better definition of landmarks should therefore contribute to better clinical decisions and research validity. This study primarily comprised of an ex vivo investigation on 50 extracted lower incisor teeth to determine whether radiopaque markers could be utilised to accurately assess lower incisor inclination. Fifty extracted lower incisor teeth were mounted onto a Perspex sheet. Radiopaque markers, manufactured from 1mm wide strips of lead film from used peri-apical radiographs, were attached to the crowns of the mounted teeth. A lateral cephalometric radiograph was taken in accordance to standard radiographic procedures (radiograph A). This showed the true inclination of the teeth. A second radiograph was taken with the roots obscured (radiograph B). Three observers traced the inclinations of the teeth on radiograph B (from incisor edge through the middle of the labio-lingual crown-root junction). The determination was done on two different occasions and the assessments compared with the true inclination. Comparative statistical analysis was applied to the readings and the results indicated that this method compared favourably with other methods to determine incisor inclination. In addition, clinical application of opaque markers to the teeth of patients demonstrated the following: it indicated exactly which tooth was being assessed, provided clear definition of the anatomical crown in the sagittal plane and served as a constant reference point for clinical, study model and cephalometric measurements. decisions and research validity. Opaque radiographic markers on teeth can contribute to more accurate cephalometric measurements in orthodontics, leading to better diagnoses, treatment planning and research validity.
Thesis (MChD (Orthodontics))--University of Pretoria, 2005.
Orthodontics
unrestricted
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Masumbuko, Kahamba Nyota. "Isolation, culture and neurogenic differentiation of human dental stem cells." Thesis, 2016. http://hdl.handle.net/10539/21593.

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A Dissertation submitted to the Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, in fulfillment of the requirements for the degree Of Master of Science in Medicine, 2016.
Dental stem cells (DSCs) have been identified in teeth and their supporting tissues. They represent an exclusive source of adult stem cells, easily isolated and manipulated for tissue repair and regeneration. This research project evaluated the neurogenic potential of the dental pulp stem cells (DPSCs) and stem cells from the pulp of human exfoliated deciduous teeth (SHEDs) in a South African cohort. Sixty non-carious permanent and deciduous teeth were extracted from healthy patients aged between 18 and 30 years and 5 and 10 years, at the University of the Witwatersrand's Oral Health Clinic in Johannesburg Charlotte Maxeke Academic Hospital, South Africa. The cells, isolated from the extracted pulp tissue were cultured, counted and then phenotyped by flow cytometry analysis. The cells were further expanded in a neural induction medium and immunocytochemistry analysis for Ki-67, doublecortin (DCX) and nestin were performed. Large colonies of both DPSCs and SHEDS were harvested from the extracted pulp tissues and positively cultured. Flow cytometry analysis confirmed the presence of CD44+ and CD29+ cells as well as the known mesenchymal stem cell markers CD90 and CD105. Both DPSCs and SHEDs demonstrated successful proliferation and neural differentiation. This study confirmed that DPSCs and SHEDs are highly proliferative human adult stem cells that exhibit a neurogenic potential that may contribute in the treatment of neurological disorders.
AC2017
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Books on the topic "Extracted teeth"

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Artist, the ruler: Essays on art, culture, and values, including extracts from Song of soldier and White teeth make people laugh on earth. Nairobi: Heinemann Kenya, 1986.

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p'Bitek, Okot. Artist, the ruler: Essays on art, culture, and values, including extracts from Song of soldier and White teeth make people laugh on earth. Nairobi: Heinemann Kenya, 1986.

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Book chapters on the topic "Extracted teeth"

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Haque, Nazmul, and Noor Hayaty Abu Kasim. "Pooled Human Serum Increases Regenerative Potential of In Vitro Expanded Stem Cells from Human Extracted Deciduous Teeth." In Stem Cells: Biology and Engineering, 29–44. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/5584_2017_74.

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Haque, Nazmul, Darius Widera, and Noor Hayaty Abu Kasim. "Stem Cells from Human Extracted Deciduous Teeth Expanded in Foetal Bovine and Human Sera Express Different Paracrine Factors After Exposure to Freshly Prepared Human Serum." In Advances in Experimental Medicine and Biology, 175–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/5584_2018_299.

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Pushpalatha, C., N. Sneha, R. Deveswaran, and Latha Anandakrishna. "Assessment of Remineralisation Potential of Cranberry Extract and Grape Seed Extract Dentifrice on Primary Teeth Using Laser Fluorescence Device." In Lecture Notes in Electrical Engineering, 187–93. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3477-5_24.

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Robinson, Max, Keith Hunter, Michael Pemberton, and Philip Sloan. "Diseases of the teeth and supporting structures." In Soames' & Southam's Oral Pathology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199697786.003.0010.

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A wide variety of processes can affect the formation of teeth during development. The number, size, shape, and quality of dental hard tis­sue may be abnormal and teeth may erupt early or be prematurely shed or resorbed. When a child presents with a tooth abnormality, the clin­ical and radiographic features are often distinctive and management depends on diagnosis (Box 5.1). Broadly, developmental abnormal­ities of the teeth can be either genetically determined or acquired as a result of injurious processes affecting the developing teeth. It can be problematic to make a diagnosis, particularly when teeth initially erupt. Sometimes pathological examination of a shed or extracted tooth by ground sectioning (for enamel) or conventional sectioning of a decalci­fied tooth can provide a diagnosis. Research has provided insights into the genetic and structural basis of dental anomalies, and has resulted in a complex and extensive classification of subtypes. Minor abnormal­ities, such as failure of development of a few teeth or enamel erosion in adult life, may be dealt with in general dental practice, but it is advisable to refer younger patients with more complex or extensive dental abnor­malities to a specialist in child dental health, with links to expert diag­nostic facilities and input from orthodontic and restorative colleagues. The publically available Online Mendelian Inheritance in Man (OMIM) database provides an invaluable resource for genetic disorders, including dental abnormalities. Supernumerary teeth are common and may be rudimentary in form or of normal morphology, when they are referred to as supplemental teeth. The most common supernumerary tooth occurs in the mid- line of the maxillary alveolus and is referred to as a mesiodens, which usually has a conical shape. Eruption of adjacent normal successor teeth may be impeded by a mesiodens, which is an indication for its removal. Most supernumerary teeth occur as a sporadic event in devel­opment, but multiple extra teeth can be found in certain developmen­tal disorders. Failure of development of tooth germs results in teeth missing from the dental arch and is referred to as hypodontia. Most often the missing teeth are third molars, second premolars, and upper lateral incisors. Hypodontia is more common in the permanent dentition than in the primary teeth.
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Kusaka, Soichiro. "Use of Stable Isotope Analysis to Reveal Relationships between Diet and Tooth Ablation Types in Jomon Period Japan." In A World View of Bioculturally Modified Teeth. University Press of Florida, 2017. http://dx.doi.org/10.5744/florida/9780813054834.003.0010.

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This chapter discusses the practice of ritual tooth ablation in Japan in relation to diet and migration. Ablation was practiced extensively among hunter-gatherers, and the tradition typically followed one of two patterns, type 4I and type 2C, depending on whether the lower incisors or canines were extracted, respectively. To test the hypothesis that a dependence on marine resources for food differed depending on ablation type during childhood and adulthood, stable isotope ratios of bone collagen and tooth enamel were measured. It was discovered that diets did vary among individuals with different ablation types in the Inariyama population. The findings provide important evidence that biocultural dietary differences were related to ablation type in the Jomon period.
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Peker, Musa, Serkan Ballı, and Ensar Arif Sağbaş. "Predicting Human Actions Using a Hybrid of ReliefF Feature Selection and Kernel-Based Extreme Learning Machine." In Cognitive Analytics, 307–25. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2460-2.ch017.

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Human activity recognition (HAR) is a growing field that provides valuable information about a person. Sensor-equipped smartwatches stand out in these studies in terms of their portability and cost. HAR systems usually preprocess raw signals, decompose signals, and then extract attributes to be used in the classifier. Attribute selection is an important step to reduce data size and provide appropriate parameters. In this chapter, classification of eight different actions (brushing teeth, walking, running, vacuuming, writing on the board, writing on paper, using the keyboard, and stationary) has been performed with smartwatch motion sensor data. Forty-two different features have been extracted from the motion sensor signals and the feature selection has been performed with the ReliefF algorithm. After that, performance evaluation has been performed with four different machine learning methods. With this study in which the best results have been obtained with the kernel-based extreme learning machine (KELM) algorithm, estimation of human action has been performed with high accuracy.
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Peker, Musa, Serkan Ballı, and Ensar Arif Sağbaş. "Predicting Human Actions Using a Hybrid of ReliefF Feature Selection and Kernel-Based Extreme Learning Machine." In Advances in Computational Intelligence and Robotics, 379–97. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4766-2.ch017.

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Human activity recognition (HAR) is a growing field that provides valuable information about a person. Sensor-equipped smartwatches stand out in these studies in terms of their portability and cost. HAR systems usually preprocess raw signals, decompose signals, and then extract attributes to be used in the classifier. Attribute selection is an important step to reduce data size and provide appropriate parameters. In this chapter, classification of eight different actions (brushing teeth, walking, running, vacuuming, writing on the board, writing on paper, using the keyboard, and stationary) has been performed with smartwatch motion sensor data. Forty-two different features have been extracted from the motion sensor signals and the feature selection has been performed with the ReliefF algorithm. After that, performance evaluation has been performed with four different machine learning methods. With this study in which the best results have been obtained with the kernel-based extreme learning machine (KELM) algorithm, estimation of human action has been performed with high accuracy.
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Lira, Pedro H. M., Gilson A. Giraldi, and Luiz A. P. Neves. "Segmentation and Feature Extraction of Panoramic Dental X-Ray Images." In Nature-Inspired Computing Design, Development, and Applications, 306–20. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-1574-8.ch017.

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Automating the process of analysis of Panoramic X-Ray images is important to help dentist procedures and diagnosis. Tooth segmentation from the radiographic images and feature extraction are essential steps. The authors propose a segmentation approach based on mathematical morphology, quadtree decomposition for mask generation, thresholding, and snake models. The feature extraction stage is steered by a shape model based on Principal Component Analysis (PCA). First, the authors take the quadtree decomposition of a low-pass version of the original image and select the smallest blocks to generate a mask. Then, the original image is processed by Otsu’s thresholding. The result is improved by morphological operators and the quadtree mask is applied to address overlapping, a common problem in X-ray images. The obtained regions are searched and the larger ones are selected to find tooth candidates. The boundary of the obtained regions are extracted and aligned with the shape model in order to recognize the target tooth (molar). The selected curve is used in a search method to initialize a snake technique. Finally, morphometric data extraction is performed to obtain tooth measurements for dentist diagnosis. Experiments show the advantages of the proposed method to extract teeth from X-Ray images and discuss its drawbacks.
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Lira, Pedro H. M., Gilson A. Giraldi, and Luiz A. P. Neves. "Segmentation and Feature Extraction of Panoramic Dental X-Ray Images." In Oral Healthcare and Technologies, 470–85. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1903-4.ch011.

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Automating the process of analysis of Panoramic X-Ray images is important to help dentist procedures and diagnosis. Tooth segmentation from the radiographic images and feature extraction are essential steps. The authors propose a segmentation approach based on mathematical morphology, quadtree decomposition for mask generation, thresholding, and snake models. The feature extraction stage is steered by a shape model based on Principal Component Analysis (PCA). First, the authors take the quadtree decomposition of a low-pass version of the original image and select the smallest blocks to generate a mask. Then, the original image is processed by Otsu's thresholding. The result is improved by morphological operators and the quadtree mask is applied to address overlapping, a common problem in X-ray images. The obtained regions are searched and the larger ones are selected to find tooth candidates. The boundary of the obtained regions are extracted and aligned with the shape model in order to recognize the target tooth (molar). The selected curve is used in a search method to initialize a snake technique. Finally, morphometric data extraction is performed to obtain tooth measurements for dentist diagnosis. Experiments show the advantages of the proposed method to extract teeth from X-Ray images and discuss its drawbacks.
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Cohen-Levy, DDS, Julia. "Orthodontic Monitoring and Case Finishing With the T-Scan System." In Advances in Medical Technologies and Clinical Practice, 1057–124. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9254-9.ch015.

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This chapter reviews T-Scan use in orthodontics from diagnosis to case finishing, and then in retention, while defining normal T-Scan recording parameters for orthodontically-treated subjects versus untreated subjects. T-Scan use in the case-finishing process is also described, which compensates for changes in the occlusion that occur during “post-orthodontic settling,” as teeth move freely within the periodontium to find an equilibrium position when the orthodontic appliances have been removed. T-Scan implementation is necessary because, often, despite there being a post treatment, visually “perfect” angle's Class I relationship established with the orthodontic treatment, ideal occlusal contacts do not result solely from tooth movement. Creating simultaneous and equal force occlusal contacts following fixed appliance removal can be accomplished using T-Scan data to optimize the end-result occlusal contact pattern. The T-Scan software's force distribution and timing indicators (the two- and three-dimensional force views, force percentage per tooth and arch half, the center of force trajectory and icon, the occlusion time [OT], and the disclusion time [DT]), all aid the Orthodontist in obtaining an ideal occlusal force distribution during case-finishing. Fortunately, most orthodontic cases remain asymptomatic during and after tooth movement. However, an occlusal force imbalance or patient discomfort may occur along with the malocclusion that needs orthodontic treatment. Symptomatic cases require special documentation at the baseline, and careful monitoring throughout the entire orthodontic process. The clinical use of T-Scan in these “fragile” cases of patient muscle in-coordination, mandibular deviation, atypical pain, and/or TMJ idiopathic arthritis, are illustrated by several case reports. The presented clinical examples highlight combining T-Scan data recorded during case diagnosis, tooth movement, and in case finishing, with patients that underwent lingual orthodontics and orthognathic surgery, orthodontic treatment using clear aligners, or conventional fixed treatment with a camouflage treatment plan, which require special occlusal finishing (when premolars are extracted in only one arch).
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Conference papers on the topic "Extracted teeth"

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Logan, Cooper M., Katrina U. Co, William A. Fried, Jacob C. Simon, Michal Staninec, Daniel Fried, and Cynthia L. Darling. "Multispectral near-infrared imaging of composite restorations in extracted teeth." In SPIE BiOS, edited by Peter Rechmann and Daniel Fried. SPIE, 2014. http://dx.doi.org/10.1117/12.2045687.

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Zhou, Yaxuan, Robert Lee, Sara Finkleman, Alireza Sadr, and Eric J. Seibel. "Near-infrared endoscopic imaging of deep artificial approximal lesions in extracted teeth." In Lasers in Dentistry XXV, edited by Peter Rechmann and Daniel Fried. SPIE, 2019. http://dx.doi.org/10.1117/12.2510310.

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Chang, Nai-Yuan, Marwa Abdelaziz, and Daniel Fried. "The relationship of dehydration rate and transparent surface layer thickness for coronal lesions on extracted teeth." In Lasers in Dentistry XXV, edited by Peter Rechmann and Daniel Fried. SPIE, 2019. http://dx.doi.org/10.1117/12.2512921.

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Tressel, John, Marwa Abdelaziz, and Daniel Fried. "High contrast reflectance imaging at 1950-nm for the assessment of lesion activity on extracted teeth." In Lasers in Dentistry XXVII, edited by Peter Rechmann and Daniel Fried. SPIE, 2021. http://dx.doi.org/10.1117/12.2584909.

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Zhu, L., M. Salloum, S. Feteih, J. Hough, D. Arola, and M. Tolba. "Experimental Study of Temperature Elevations in Extracted Teeth Using a System B Heating Catheter for Bacterial Disinfection." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19125.

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Total bacterial disinfection and elimination from the human root canal system are crucial in clinical endodontic procedures [Card et al., 2002; Kakoli et al., 2009]. The current approaches relying on mechanical instrumentation and root canal irrigation and medicaments have demonstrated that eradication of bacteria occurs when the bacteria are in direct contact with the medicaments. However, persistent infection following routine treatments has suggested that bacteria may harbor in the root canal anatomical irregularities and/or deep dentinal tubules, therefore, surface irrigation of medicaments may not be able to reach those regions. Heat treatment has been used for obturation of the root canal in endodontic practice. In this study we hypothesize that as an alternative, surface heating using a System B heating catheter through the root canal surface would be effective for bacterial elimination in the deep dentin. The heat-induced cytotoxic response kills bacteria in the root dentin via heat conduction from the thermal energy incident on the root canal wall. In principle, a high power setting and/or a long heating duration can always achieve sufficient temperature elevations in deep dentin. Yet, the detailed temperature distribution inside the dentin and possible thermal damage to the supporting periodontium are unknown. Therefore, it is of clinical importance to perform and investigate temperature elevations in dentin to provide clinicians with an optimized and effective treatment protocol to minimize unnecessary thermal damage to the surrounding structure.
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Chang, Nai-Yuan N., Tina Dillas, and Daniel Fried. "Assessing lesion activity of secondary lesions on extracted teeth by thermal dehydration measurement and optical coherence tomography." In Lasers in Dentistry XXVIII, edited by Peter Rechmann and Daniel Fried. SPIE, 2022. http://dx.doi.org/10.1117/12.2608291.

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Nichipor, E. A., V. V. Petrovskaya, V. G. Alpatova, A. Yu Vasilyev, N. N. Potrakhov, V. B. Bessonov, N. E. Staroverov, et al. "Microfocus cone-beam computed tomography in an experimental study of dental filling materials and metal fragments inside the root canals of extracted teeth." In 7TH INTERNATIONAL CONFERENCE ON X-RAY, ELECTROVACUUM AND BIOMEDICAL TECHNIQUE. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0052891.

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Karpat, F., S. Ekwaro-Osire, and M. P. H. Khandaker. "Probabilistic Analysis of MEMS Asymmetric Gear Tooth." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15008.

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Asymmetric gear teeth are used to improve the performance of gears by increasing the load capacity or by reducing vibrations. Recently these types of gears have found application in MEMS devices where the use of gears is on the rise. In this research a probabilistic computer program, in conjunction with a commercially available finite element program, is developed and the reliability of the asymmetric gear tooth is studied. Specifically, the probability of failure of the asymmetric gear is extracted for various parameters. The parameters considered included pressure angle, tooth height, and contact ratio. The efficacy of using asymmetric gear tooth is shown in this study.
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Dwyer-Joyce, R. S., R. Lewis, and M. Goodman. "Ultrasound as a Tool to Measure the Wear of Human Tooth Enamel." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63499.

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A reliable tool for assessing the extent of human enamel wear would be useful to dental practitioners. Current in-vivo methods for determining tooth wear are largely qualitative in nature or depend on measurements taken from tooth impressions, which is very time consuming. The aim of this work was to investigate the feasibility of using ultrasound to measure enamel thickness with a view to developing an in-vivo tool for enamel wear assessment. Three different ultrasonic techniques were used in-vitro to take measurements of enamel on extracted teeth. The first used a focusing immersion transducer (25 MHz) and a time of flight approach to obtain enamel thickness. The other two techniques used planar contact probes (10 MHz), the first with a time of flight approach and the second with a resonance method to determine enamel thickness. The results were compared with direct measurements of sectioned teeth. All three methods showed good correlation with these measurements. The contact probe technique was the easiest measurement to carry out, which would also be the simplest to implement in a measurement tool. While the resonance measurements obtained were good, the time of flight approach was thought to be most likely to obtain accurate repeatable measurements.
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Declerck, D., F. Vinckier, and J. Vermylen. "DURATION OF BLEEDING FOLLOWING DENTAL EXTRACTION IN RABBITS:IN FLUENCE OF PLATELET DYSFUNCTION." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644226.

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Clinical experience suggests that acetylsalicylic acid prolongs bleeding after dental extraction, but objective evidence is lacking. We have studied the influence of platelet dysfunction on haemostasis following dental extraction in rabbits. Platelet defects were induced by oral administration of acetylsalicylic acid (ASA) or ticlopidine (T). Duration of bleeding was measured in following groups of Dutch rabbits:(A) control animals (n = 32),animals who received (B) ASA 100 mg/kg/day (n = 31), (C) ASA 300 mg/kg/day (n = 12)(D) T 60 mg/kg/day (n = 8) and (E) T 125 mg/kg/day (n = 12). Inhibition of thromboxane B2-formation was more than 99% in animals receiving ASA. ADP-induced platelet aggregation was inhibited in animals receiving T. Four front teeth were extracted on day 7 and tooth socket bleeding times were determined by inspecting the wounds at 5 min intervals. Oozing sockets were counted. The figure below shows the results.It is concluded that ASA or T prolong bleeding following dental extraction in rabbits. The effect appears to be dose-dependent for T. This model may be useful for evaluating haemostatic procedures applicable to patients with platelet disorders.
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