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Dissertations / Theses on the topic 'Dentistry Orthodontics'
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1
Suliman, Shameela Haroon. "The soft-tissue profile preferences of a group of lay persons and professionals." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8182_1267657357.
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Although facial aesthetics has always been a part of orthodontic diagnosis and treatment planning, the criteria for facial evaluation have been somewhat arbitrary. They are often based on parameters from the field of art or from evaluating faces chosen by orthodontists or other professionals. The aims and objectives of the study were to determine the soft-tissue profile preference of a group of lay persons and professionals
to compare the preferences of the male and female assessors (lay persons group) with regard to the preferred profiles for the maleand female patient respectively
to test similarities and differences in the professional's perceptions of the various profiles. This qualitative study was undertaken at the orthodontic clinic at UWC using post-treatment soft tissue profile photographs of patients who had attended the orthodontic clinic..."
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Cavalancia, James. "EFFECTS OF A LINGUAL ARCH AS MAXIMUM ANCHORAGE IN ORTHODONTICS." Master's thesis, Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/456182.
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Oral BiologyM.S.
Lingual arches are frequently used in orthodontic extraction treatment, with the intended purpose of achieving maximum anchorage in the mandibular arch; however, little evidence exists in the literature that supports this anchorage approach. The lingual arch is widely supported in the literature for space maintenance and sagittal correction. It has been proven effective at minimizing any decreases in arch depth and perimeter when there is early loss of primary teeth. Theoretically, the lingual arch as a passive maintenance appliance should exert no forces on the teeth, yet studies have shown both the molars and incisors to move. To examine its anchorage efficiency further, we compared incisor and molar position in extraction treatment with and without the use of a lingual arch. Pre and post-treatment cephalograms that included lower premolar extractions were recruited from a depository of images. Canine retraction with power chain or NiTi closing coils with or without the use of a lingual arch for maximum anchorage were compared for incisor and molar position. Angular and millimetric measurements for IMPA, L1-NB, L1-APog and molar mesialization were measured and compared using a t-test. The greatest difference between pre and post-treatment was the IMPA with 5.19° more uprighting of the incisors in the group with no lingual arch, followed by 4.38° more uprighting in the L1-APog measurement. However, none of the differences between the groups were significant: IMPA (p=0.129), L1-NB (angular p=0.161, millimetric p=0.205), L1-APog (angular p=0.197, millimetric p=0.196) and mesialization of the molar (p=0.308). The change in incisor and molar position does not significantly differ with or without the use of a lingual arch in extraction treatment. Clinically, this suggests that the lingual arch does not provide maximum anchorage. Another modality, such as TADs, may provide a better source of anchorage for space closure.
Temple University--Theses
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Sandretti, Matthew A., Bhavna Shroff, Steven J. Lindauer, and Al M. Best. "Restoring Lateral Incisors and Orthodontic Treatment: Perceptions among General Dentists and Othodontists." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3727.
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The purpose of this study was to identify and compare preferences and perceptions of orthodontists and general dentists when restoring peg-shaped lateral incisors. The investigation sought to summarize these preferences with regard to treatment planning, tooth preparation and interdisciplinary communication. A pair of mailed and electronic surveys was distributed to 1,500 general dentists and orthodontists, respectively. The results indicated that general dentists perceived that general dentists held the primary decision-making responsibility, while orthodontists disagreed (P<0.0001). Orthodontists prioritized the treatment goals of Class I canine relationship and overbite/overjet more significantly than general dentists, whom valued tooth proportions more highly (P<0.0001). General dentists reported receiving significantly less input than orthodontists report seeking (P<0.0001).The consensus of both groups showed that the tooth should be positioned centered mesiodistally and guided by the gingival margins incisogingivally. Both groups agree that orthodontists must improve communication to improve treatment results.
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La, Rochelle Natalie R. "Work-Related Musculoskeletal Disorders Among Dentists and Orthodontists." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4765.
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WORK-RELATED MUSCULOSKELETAL DISORDERS AMONG DENTISTS AND ORTHODONTISTS
A thesis submitted in partial fulfillment of the requirements for the degree of
Master of Science in Dentistry at Virginia Commonwealth University.
by
Natalie R. La Rochelle
Thesis Director: Dr. Eser Tüfekçi, D.D.S., M.S., Ph.D., M.S.H.A.
Professor, Department of Orthodontics
Virginia Commonwealth University
Richmond, Virginia
May 2017
The practice of dentistry is physically demanding due to static and dynamic postures sustained daily throughout careers. Previous literature suggests that work-related musculoskeletal disorders (WMSD) are not solely the result of work habits, but also due to the individual, his or her physical makeup, genetics, and personal lifestyle. A 33-question survey was distributed to 1000 general dentists and 2300 orthodontists. The overall prevalence of work-related musculoskeletal disorders was greater among dentists and most often reported as self-limiting. Dentists were three times more likely than orthodontists to report WMSD; females were twice as likely to report WMSD than males; those who sought alternative medical remedies were two times more likely to have WMSD; and practitioners 6-10 years in practice were least likely to report WMSD. Dentists reported sitting in static positions longer than orthodontists; and those with WMSD indicated exercising, stretching, and seeking alternative health remedies more than dentists without WMSD.
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Ker, Alan Joseph. "Esthetics and smile characteristics from the layperson's perspective a computer based survey study, part I /." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1208057546.
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Potts, Brittany Leigh Weaver. "Dental and skeletal outcomes for class II surgical-orthodontic treatment a comparison between experienced and novice clinicians /." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1236704017.
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Chang, Anna Wai-Yee. "Similarity analysis in pattern matching morphological occlusograms /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16745.pdf.
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Terrana, Nicholas Ralph. "Orthodontist and General Practitioner Perceptions of Invisalign Treatment Outcomes." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/578670.
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Oral BiologyM.S.
Objectives: Little is known about the treatment standards and expectations of Invisalign treatment outcomes between orthodontists and general practitioners (GP). The objective of this qualitative research project was to explore how orthodontists and GPs perceive Invisalign treatment outcomes, and to determine which criteria they use to judge successful treatment. Methods: Open-ended interviews were conducted with three orthodontists and two GPs. These interviews were recorded, transcribed, coded and analyzed by the conventional phenomenological qualitative research protocol. Each clinician selected four Invisalign cases that they treated and perceived as successful outcomes. To augment qualitative methods, quantitative data were generated to determine pre-treatment Discrepancy Index (DI) and post-treatment Objective Grading System (OGS) scores as calculated by OrthoCAD software. Results: Independent sample T-tests showed no significant difference in total DI score (p=0.287) and total OGS score (p=0.840) between the orthodontist (n=12) and GP (n=7) cases. Orthodontists perceive incisor torque and smile esthetics as important criteria for successful Invisalign outcomes. In contrast, GPs do not. Orthodontists and GPs unanimously perceive that Class I occlusion is an important criterion for successful treatment. GPs perceive extraction cases as a challenge to obtain successful outcome with Invisalign whereas, orthodontists do not. Conclusions: Differences exist between orthodontist and GP perceptions of what constitutes successful Invisalign treatment. Currently employed standards of excellence can be found in a wide spectrum of finishes; however, they are incapable of defining the excellence of finish. Selective standards differentiate the GPs from orthodontists, but agreement exists for ambition to finish in Class I occlusion. Esthetics and torque are valued higher by the orthodontists than are by the GPs. The utility of current standards- of-care need to be questioned and redefined.
Temple University--Theses
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Rossouw, Paul Emile. "A longitudinal study of the stability of the dentition following orthodontic treatment." Thesis, Stellenbosch : Stellenbosch University, 1992. http://hdl.handle.net/10019.1/70107.
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Thesis (PhD) -- Stellenbosch University , 1992.ENGLISH ABSTRACT: The maintenance of dental alignment following orthodontic treatment has been, and continues to be, a challenge for the orthodontist (McReynolds and Little, 1991). Orthodontists should endeavour to establish normal occlusions and function to the end that physiologic balance and retentive stability may be achieved (Goldstein, 1953). Many philosophies and theories have been formulated in response to this challenge, but few have successfully withstood the test of rigorous post-orthodontic evaluation. The present study comprises longitudinal assessments of dentofacial changes which occurred in South African Caucasian subjects during their orthodontic treatment as well as a mean of 7 years following active treatnent. The sample consists of 88 Caucasian subjects; 33 males and 55 female sUbjects who have undergone conventional edgewise orthodontic treatment (Lindquist; 1985). The treatment includes extraction (56%) and nonextraction (44%) therapy. Due to the intricate structure of the craniofacial complex, it is deemed important to discuss the major components of this complex separately and then to compare the variables describing the area with post-orthodontic lower incisor crowding. Lower incisor crowding or irregularity, most often referred to as relapse when occurring in the post-orthodontic dentition, is a phenom~non that is clinically visible and easily assessed using the Little Irregularity Index (Little, 1975). A variety of orthodontic study cast and cephalometric variables represent the changes which occur at the three time intervals selected for this study, namely pre-treatment (T1), post-treatment (T2) and following active treatment (T3). statistical analysis of th~ data was undertaken by the Institute for Biostatistics of the Medical Research Council, Tygerberg, RSA utilising the SAS (1985). The significance level of the results of this study is set at p = 0.05. x No previous study has documented the evaluated and described the various craniofacial skeleton in this format. literature parts or has of the The thesis is divided into thirteen chapters.
AFRIKAANSE OPSOMMING: Die instandhouding van tandbelyning na voltooiing van ortodontiese behandeling was en sal nag steeds in die toekoms 'n uitdaging bied vir ortodontiste (McReynolds en Little, 1991). Die ortodontis se strewe moet wees am 'n normale okkli'lsie in die ortodontiese pasient te veE)tig, waartydens die funksie van die kake herstel word, asook fisiologiese harmonie en stabiliteit van die okklusie gevestig ~lOrd (Goldstein, 1953) • Menige filosofiee en teoriee is al voorgestel om hierdie doelwitte te kan bereik, maar baie min het nag daarin geslaag. Tydens die huidige longitudinale studie is gepoog om In ondersoek te doen van die veranderinge wat plaasvind in die dentofasiale omgewing van agt-en-tagtig Suid-Afrikaanse Kaukasiese pasiente tydens hulle ortodontiese behandeling, asook na die verloop van 'n gemiddeld van sewe jaar sedert die behandeling voltooi was. Die monster het uit 33 manlike en 55 vroulike pasiente bestaan wat met 'n konvensionele vierkantsdraad ("edg~wise") ortodontiese tegniek behandel was (Lindquist, 1985). Die behandeling het 56% ekstraksie en 44% ni~-ekstraksie behandelingsbeplannings ingesluit. Weens die baie komplekse kraniofasiale omgewing is dit besluit am elke deel waaruit hierdie omgewing bestaan, afsonderlik te beskryf en te bespreek. Die veranderlikes wat elke deel beskryf is vervolgens gekorreleer met die na-behandelings ondersnytand-bondeling. Ondersnytandbondeling is 'n verskynsel wat klinies sigbaar is en meestal na verwys word as terugval indien dit voorkom in die na-behandelings resultaat. Dit kan maklik gemeet word met behulp van die "Little Irregularity Index" (Little, 1975). 'n Verskeidenheid van ortodontiese studiemodelle en kefalometrie~Je verander.likes is tydens die voor-behandelings (T1), na-behandelings (T2) asook na verloop van 'n gemidd.eld van sewe jaar na afhandeling van die behandeling (T3) gemeet. Die statistiese verwerkinge is deuI' die Institu,ut vir Biostatistiek van die Mediese Navorsingsraad, Tygerberg, R.S.A. gedoen deur middel van die SAS (1985). Die betekenisvolheidsperk van die studie is op P = 0.05 gestel. Geen studie het al voorheen die literatuur gedefineerde areas van die kranio-fasiale skelet formaat ondersoek of be~kryf nie. Die proefskrif bestaan uit dertien hoofstukke.
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Pawlak, Caroline E. "Orthodontic Informed Consent Considering Information Load and Serial Position Effect." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1395964866.
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Burke, Brandon. "Perception of soft tissue laser use in orthodontic practice: a survey of orthodontists, periodontists, and general dentists." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2199.
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Recently, soft tissue lasers have been introduced into orthodontic practice to perform procedures that were traditionally referred to other dental professionals. The purpose of this study was to compare the attitudes of orthodontists, periodontists, and general dentists regarding the use of soft tissue lasers by orthodontists. The ultimate goal was to facilitate communication among dental professionals and improve the care of orthodontic patients requiring management of soft tissues. A survey was developed to evaluate and compare the current opinions of orthodontists (n=330), periodontists (n=171), and general dentists (n=77) regarding orthodontists’ use of soft tissue lasers. When compared to orthodontists and general dentists, a lower percentage of periodontists indicated that soft tissue laser use by orthodontists was appropriate (P = 0.001). Also, for each of the 8 specific soft tissue laser procedures investigated, periodontists reported a significantly lower level (P = 0.001) of appropriateness than did orthodontists and general dentists.
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Hamilton, Jennifer. "Individual preferences for profile attractiveness comparing two diagnostic techniques." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5045.
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Thesis (M.S.)--West Virginia University, 2007.Title from document title page. Document formatted into pages; contains viii, 173 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 82-86).
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Kalanzi, Dunstan. "Prevalence of signs and symptoms of temporomandibular joint dysfunction in subjects with different occlusions using the Helkimo Index." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&.
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The controversy surrounding the role of malocclusion and orthodontic treatment in temporomandibular joint (TMJ) dysfunction led to this study. The purpose of this study was to establish the prevalence and compare the status of signs and symptoms of TMJ dysfunction in four groups of adolescents and young adults. The groups consisted of 14 persons with normal occlusions, 23 with untreated malocclusions, 20 with malocclusions currently undergoing treatment, and 18 with treated malocclusions. The Helkimo index was used to collect the TMJ dysfunction data. The results showed that the untreated malocclusion group had the most number of persons with signs and symptoms of dysfunction, but the differences between the groups in the distribution of persons according to the anamnestic and clinical dysfunction indices were not statistically significant. There were also no statistically significant differences in the distribution of signs and symptoms between boys and girls. According to anamnesis, the most frequently reported symptoms were joint sounds and headaches or neckaches occurring more than twice a week. Amongst the clinical signs and symptoms, themost commonly occurring were joint sounds on auscultation and muscle tenderness on palpation. In light of the small study sample and the absence of any substantial differences between the four groups, the role of malocclusion and orthodontic treatment in the aetiology of TMJ dysfunction remains obscure.
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Trockel, Christopher. "Assessment of the role that second molars play in bite-opening during orthodontic treatment in adolescents : a retrospective, cephalometric study." Thesis, NSUWorks, 2013. https://nsuworks.nova.edu/hpd_cdm_stuetd/46.
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A thesis submitted to the College of Dental Medicine of Nova Southeastern University of the degree of Master of Science in Dentistry.
Abstract ASSESSMENT OF THE ROLE THAT SECOND MOLARS PLAY IN BITE-OPENING DURING ORTHODONTIC TREATMENT IN ADOLESCENTS: A RETROSPECTIVE, CEPHALOMETRIC STUDY DEGREE DATE: DECEMBER 6, 2013 Christopher B. Trockel, D.D.S. COLLEGE OF DENTAL MEDICINE NOVA SOUTHEASTERN UNIVERSITY Thesis Directed By: Shiva Khatami D.D.S., Ph.D, Committee Chair Mark Hall, D.D.S., Committee Member Abraham Lifshitz, Committee Member Objectives: This study aimed to investigate the role that second molars play in increasing the facial vertical dimension by comparing vertical changes experienced in growing patients, who had their second molars incorporated into the orthodontic appliance, with those that did not. The study investigated associations between the vertical changes experienced through treatment and the initial vertical classification of the patients (normo-, hypo-, and hyperdivergent). Background: Many studies have investigated the changes in the vertical dimensions that occur in orthodontic treatment. It has been shown that almost all orthodontic appliances produce extrusion whether desired or not. In theory, this extrusion may lead to an increase of the skeletal vertical dimension. Conventional wisdom says that second molars play a significant role in vertical control during treatment. Therefore, some practitioners advocate viii incorporating the second molars as soon as possible in treatment to help open the bite. It is also thought that it may be wise to not incorporate the second molars during treatment at all in cases with an open bite tendency. Methods: Eighty de-identified pre-treatment cephalometric radiographs (40 with second molars bonded and 40 without second molars bonded) from growing patients treated at the orthodontic clinic at Nova Southeastern University were analyzed and compared to their post-treatment analogs. Twelve linear and angular measurements were made (overbite, maxillary molar to palatal plane, mandibular molar to mandibular plane, upper anterior dentoalveolar height, lower anterior dentoalveolar height, upper anterior facial height, lower anterior facial height, total posterior facial height, lower posterior facial height, UAFH/LAFH ratio, mandibular plane angle, and Y-axis). Results: The results indicated that the vertical dimension was not significantly altered based solely on whether or not the second molars were incorporated into the orthodontic appliance. Changes experienced by both groups (bonded and non bonded) and all three subgroups (hypo-, normo-, and hyperdivergent) were consistent with what would be expected for growth alone. Conclusion: Bonding second molars in a growing population during orthodontic treatment does not significantly affect the vertical dimension, regardless of the patient's initial skeletal vertical classification.
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Feldon, Paul. "Diode laser debonding of ceramic brackets." Thesis, NSUWorks, 2008. https://nsuworks.nova.edu/hpd_cdm_stuetd/39.
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McHenry, Kory. "Comparison of human and bovine teeth for enamel adhesion testing." Thesis, NSUWorks, 2008. https://nsuworks.nova.edu/hpd_cdm_stuetd/38.
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Adusumilli, Prathima. "Analysis of intermolar, intercuspid ratios and facial heights in different malocclusions." Thesis, NSUWorks, 2010. https://nsuworks.nova.edu/hpd_cdm_stuetd/36.
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Phillips, Joseph, and James Chen. "PATIENT AND PARENT PERCEPTIONS ON OUTCOMES IN EARLY ORTHODONTIC TREATMENT." Scholarly Commons, 2020. https://scholarlycommons.pacific.edu/dugoni_etd/3.
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Introduction: Orthodontics has clinical benefits, however, the psychosocial outcomes are not well understood. These soft benefits are often classified as aesthetic, functional, and psychosocial, however, there is limited work understanding these outcomes as reported directly from the patient. By better understanding the patient’s perspectives, we can continually refine our clinical model to be patient-centric and more appropriately manage the patient’s expectations and experiences. Materials and Methods: This is a cross-sectional qualitative study of 20 parents of 24 children ages 8-11 years. Participants were remotely interviewed using a semi-structured chronologically based line of questioning to elucidate their perceived outcomes of early orthodontic treatment or phase one. A content thematic analysis using a framework approach was used to analyze the resulting data. Results: The thematic analysis uncovered four major themes and associated subthemes as follows (1) dental health including functional changes, aesthetic improvement, and improved cleansability; (2) opportunity cost: meaning harnessing growth for lasting change, avoidance of future orthodontic treatment, avoidance of future dental treatment, and supervision of growth; (3) social outcomes: encompassing external perception and acceptance, self-perception, parental perception, and reduced dental anxiety; and (4) behavioral changes: including the correction of bad habits, development of good oral hygiene, and an increase in responsibility of the patient. Conclusions:This study highlights the depth of psychosocial benefit perceived by patients undergoing early orthodontic treatment, with the main outcome being functional improvement, followed by an advantage to treatment at a young age, and an improvement in aesthetics. Patients did not recognize an increase in self-perception which is contrary to outcomes previously found in other age groups.
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Franks, David. "Occurrence and Evaluation of White Spot Lesions in Orthodontic Patients: A Pilot Study." Master's thesis, Temple University Libraries, 2014. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/286676.
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Oral BiologyM.S.
Orthodontic treatment may cause an increase in the rate of enamel decalcification on tooth surfaces, producing White Spot Lesions (WSL). Orthodontic patients are at a higher risk for decalcification because orthodontic appliances retain food debris which leads to increased plaque formation. Dental plaque, an oral biofilm formed by factors including genetics, diet, hygiene, and environment, contains acid producing bacterial strains with a predominance of Mutans Streptococcus (MS). MS and others metabolize oral carbohydrates during ingestion, the byproducts of which acidify the biofilm to begin a process of enamel decalcification and formation of WSL. This study tests if patients in orthodontic treatment at Temple University can be used as subjects for further longitudinal study of WSL risk factors. Twenty patients between the ages of ten to eighteen after three months or greater of treatment were enrolled to determine if duration of treatment, hygiene, sense of coherence, obesity, diet frequencies, age and gender correlated with development of WSL. Of these, age is positively correlated with the number of untreated decayed surfaces. WSL and plaque levels may negatively correlate with increased brushing frequency and duration, while flossing frequency demonstrated a statistically significant negative correlation. This population may be suitable for further study because of its high incidence of WSL (75%), however difficulty in enrollment and patient attrition necessitates that future studies be modified.
Temple University--Theses
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Hou, Jack. "Changes in integumental dimensions of the face following orthodontic treatment." View the abstract Download the full-text PDF version, 2006. http://etd.utmem.edu/WORLD-ACCESS/hou/2006-006-hou.pdf.
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Thesis (M.S. )--University of Tennessee Health Science Center, 2006.Title from title page screen (viewed on April 24, 2008). Research advisor: Edward Harris, Ph.D.. Document formatted into pages (xi, 130 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 116-130).
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Best, Alexandra D. "Comparison of treatment management between orthodontists and general practitioners performing clear aligner therapy." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4158.
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The purpose of this study was to investigate differences in case confidence, treatment management, and Invisalign® expertise between orthodontists and general dentists. A survey was mailed to 1,000 randomly selected orthodontists and general dentists, respectively, who are Invisalign® providers, and results were analyzed. The results indicated that orthodontists treated significantly more Invisalign® cases and received more Invisalign® training than general dentists (P
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Elgin, Craig Ross. "Factors Affecting Patient Selection of an Orthodontic Practice." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1330704747.
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Tuchman, Marni. "COMPARISON OF INSERTION ANGULATIONS MEASURED VIA BONE-TO-IMPLANT CONTACT OF MINI-SCREWS USING MICRO-CT." Master's thesis, Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/520294.
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Oral BiologyM.S.
Bone-to-implant contact of orthodontic mini-screws has been determined via Micro-CT to be a strong predictor of primary stability. Various insertion angulations, including both 900 and 500, have been reported as ideal for providing optimum primary stability. The aim of this investigation was to determine if a statistically significant difference exists in the bone-to-implant contact of mini-screws placed with an insertion angulation of 900 compared to those placed at 500 as determined via Micro-CT. Ten self-drilling, self-tapping orthodontic mini-screws (Aarhus,1.5mmx6mm) (n=5) were inserted into the posterior ramus of an adult pig mandible, an analog to an adult human mandible. A custom stent with ten holes, five at 900 and five at 500, was fitted to the bone surface to control insertion angulation. The bone was cut to 1.5x1.5x1cm segments and scanned using SkyScan 1127 with ideal specifications (8mm pixel size, medium camera, 80Kv, 100mA, 10W, 1800 rotation, and 0.5Al+0.25Cu filter). The raw scans were reconstructed using NReconV1.6.10 and these datasets were then reoriented using DataviewerV1.5.2 along the Z-axis to standardize the peri-implant bone for analysis. A custom task-list was used with CT-AnalyzerV1.14.41 to determine the percent of bone-to-implant contact per mini-screw. A Mann-Whitney U test indicated that the bone-to-implant contact was not statistically significantly different for the mini-screws placed at 900 (Mdn= 72.34) compared to the mini-screws placed at 500 (Mdn= 53.25), U=5, p=.1443. Therefore, the results do not significantly differ at p<.05. There is no statistically significant difference in the bone-to-implant contact between the Aarhus 1.5mmx6mm orthodontic mini-screws placed at 900 compared to those placed at 500 as measured by Micro-CT. This may lead to the conclusion that there is no significant difference in the primary stability of Aarhus mini-screws placed at 900 and 500.
Temple University--Theses
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Carroll, Keldon Michael. "Investigation into the significance of daily Invisalign tray wear duration." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1522789295620812.
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Buelow, Dwight Van. "Measurement of Forces and Moments in Three-Dimensional Archwires." VCU Scholars Compass, 2003. http://scholarscompass.vcu.edu/etd/783.
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AbstractMEASUREMENT OF FORCES AND MOMENTS IN THREE-DIMENSIONAL ARCHWIRESBy Dwight V. Buelow, D.D.S.A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science at Virginia Commonwealth University.Virginia Commonwealth University, 2003Major Director: Steven J. Lindauer, D.M.D., M.D.Sc.Chairman and Professor, Department of OrthodonticsOrthodontic tooth movement occurs in response to the application of controlled mechanical force systems. The purpose of this study was to improve understanding of those force systems by evaluating differences between the resultants of two-dimensional and three-dimensional orthodontic appliance activations. An in-vitro model was constructed and three force-moment gauges were used to measure the forces and moments produced. Comparisons were made between two-dimensional and three-dimensional v-bend activations. Measurements were made with both edgewise and ribbonwise wire orientations. Locations of v-bends resulting in zero moment at the incisor were found to be closer to the molar than the anticipated 1/3 of the distance from molar to incisor, for both two-dimensional and three-dimensional wires. For two-dimensional wires, this v-bend location was found to be approximately ¼, while for three-dimensional wires it was even closer to the molar. Ribbonwise wires, both two-dimensional and three-dimensional, produced forces and moments of greater magnitude than their edgewise counterparts. Further research is required to explain the differences between anticipated and actual results, and to develop more accurate means of modeling orthodontic force systems.
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Ghaffari, Ashkan. "Treatment Outcomes and Retention in Medicaid and non-Medicaid Orthodontic Patients." VCU Scholars Compass, 2008. http://scholarscompass.vcu.edu/etd/1520.
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Medicaid orthodontic patients have been shown to miss more appointments and break more appliances than self-pay patients, indicating a greater tendency toward non-compliance. Lack of compliance during the post-treatment phase can be detrimental to retention. The purpose of this study was to determine whether there is a difference in PAR score changes between Medicaid and non-Medicaid patients during and after orthodontic treatment. PAR scores were determined using study models of 43 Medicaid and 39 non-Medicaid patients before and at the end of active treatment, and 24 Medicaid and 42 non-Medicaid patients at the end of treatment and at an average of 13 months post-treatment. PAR scores generally reduce during treatment and will increase if relapse occurs. Rates of PAR score change during and after treatment were compared between Medicaid and non-Medicaid patients using the Mann-Whitney U-test. The mean initial PAR score was greater in the Medicaid group (31.95 versus 23.28; p=0.003) while there was no significant difference found between the two groups for the end of treatment PAR scores (3.22 versus 2.93; p=0.451). The rates of PAR score improvement during treatment (14.07/year versus 12.14/year; p=0.203) and worsening after the removal of orthodontic appliances (2.04/year versus 2.91/year; p=0.872) were found not to differ between the two groups. It was found that the rate of PAR score improvement during treatment did not differ between Medicaid and non-Medicaid patients. During the post-treatment period, the rate of PAR score worsening was also found not to differ.
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Bomeli, Philip Daniel. "Orthodontics and quality of life : a 24-month report /." Connect to resource, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1181061831.
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Mountain, Keith John. "Temporomandibular joint dysfunction syndrome : relationship of fixed appliance orthodontic treatment as a possible aetiological factor." University of Sydney, 1988. http://hdl.handle.net/2123/4724.
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Master of Dental SurgeryThis work was digitised and made available on open access by the University of Sydney, Faculty of Dentistry and Sydney eScholarship . It may only be used for the purposes of research and study. Where possible, the Faculty will try to notify the author of this work. If you have any inquiries or issues regarding this work being made available please contact the Sydney eScholarship Repository Coordinator - ses@library.usyd.edu.au
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Schrader, Michelle. "Assessing the Diagnostic Value of Lateral Cephalometric Radiographs in Class I Dental Malocclusions." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/583754.
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Oral BiologyM.S.
Introduction: Controversy exists over the value of a lateral cephalogram for treatment planning in different malocclusion types. Discord has been found in the literature, and no studies on the matter have focused solely on Class I dental malocclusions. The aim of this study was to elucidate whether treatment decisions of extraction or non-extraction and the perceived need for a lateral cephalogram would change depending on whether a lateral cephalogram was provided or eliminated in the patient record set. Methods: A survey was distributed to a random sample of AAO members. The survey consisted of four different patient record sets, each with a Class I dental malocclusion. Each record set had two versions—one with the lateral cephalogram and one without. The survey had randomization of each version of the record sets so that each record set would be viewed an equal number of times with and without its corresponding cephalogram. Subjects were then asked a series of four questions pertaining to each case: was a cephalogram necessary for treatment planning, treatment of extraction versus non-extraction, retention method, and if records were adequate to treatment plan. Results: In total, 79 orthodontists completed the survey. For all cases combined, record sets viewed with the lateral cephalogram had an increase in the: perceived need for a lateral cephalogram, decision of extraction, and opinion of the records being adequate to treatment plan. All were statistically significant at P ≤ 0.001. For each record set, the difference in perceived need for a lateral cephalogram was statically significant. Conclusions: The use of a lateral cephalogram for diagnosing and treatment planning seems to hold value in Class I dental malocclusions, justifying radiation exposure for this diagnostic record. Additionally, the perceived need for a lateral cephalogram is greater when it is presented with the record sets, demonstrating the diagnostic value this radiograph holds.
Temple University--Theses
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Carr, Kelly Marie. "The Impact of Verbal Explanation and Modified Consent Materials on Orthodontic Informed Consent." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1298904481.
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Karlsson, Ingela. "Distal movement of maxillary molars. Studies of efficiency and timing of treatment." Licentiate thesis, Malmö högskola, Odontologiska fakulteten (OD), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-7764.
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Den vanligaste bettavvikelsen som behandlas bland barn och ungdomar är trångställning. När funktionellt och estetiskt störande trångställning i överkäken ska behandlas kan man vanligtvis ta bort tänder eller flytta de första stora kindtänderna (sexårständerna) bakåt för att sedan göra tandraden jämn. Det finns flera vetenskapliga studier som beskriver behandlingseffekterna av olika tandställningar för att flytta de stora kindtänderna bakåt. Det är oklart vilken typ av tandställning som är effektivast och i allmänhet saknas ett evidensbaserat perspektiv. Det är också oklart vid vilken tidpunkt som det är mest effektivt att flytta sexårständerna bakåt, dvs. före eller efter det att de andra stora kindtänderna kommit på plats i tandbågen. Licentiatavhandlingen är baserad på följande studier: Med randomiserad kontrollerad studiedesign var syftet i Studie I att utvärdera behandlingseffekterna av två olika tandställningar för att flytta överkäkens sexårständer bakåt i tandbågen. Fyrtio patienter randomiserades, 20 till en avtagbar tandställning (extraoralt drag) och 20 patienter till en fast tandställning. Studie II hade syftet att analysera när behandlingen var effektivast, dvs. att tandreglera sexårstanden bakåt innan eller efter att den bakomvarande stora kindtanden kommit på plats i tandbågen. I ramberättelsen utfördes dessutom en systematisk litteraturöversikt med syfte att på ett evidensbaserat sätt utvärdera olika metoders effektivitet i att tandreglera de stora kindtänderna bakåt i tandbågen och att göra en kvalitetsbedömning av de utvalda studierna. Översikten omfattade tidsperioden från januari 1966 t o m april 2008 vilket innebar att bedömningen även inkluderade studierna I och II. Konklusioner: • Fast tandställning var effektivare än avtagbar för att flytta de första stora kindtänderna bakåt i tandbågen. • Sidoeffekter i form av 1-2 mm ökat överbett (förankringsförlust) uppstod vid behandling med fast tandställning medan avtagbar tandställning bidrog till minskat överbett. • Det var mest effektivt att tandreglera sexårstanden bakåt innan den bakomvarande stora kindtanden kommit på plats i tandbågen. • I litteraturen fanns det begränsat bevisvärde för att fast tandställning är mer effektiv än avtagbar för bakåtförflyttning av första stora kindtanden i överkäken och att sidoeffekter (1-2 mm ökat överbett) blir följden av den fastsittande apparaturen. • Det är fortfarande svårt att via litteraturen dra några slutsatser om vilken typ av fast tandställning som är mest effektiv och därför behövs det ännu mer forskning om detta.Maxillary molar distalization is a frequently used treatment method in cases with crowding associated with dental Class II molar relationship or Class I skeletal relationship. Despite the fact that several studies have been published concerning the treatment outcome of different appliances for distal movement of maxillary molars, it is still difficult to interpret the results and evidence presented in these studies because a variety of study designs, sample sizes and research approaches exists. In view of this, well-designed randomized clinical trials comparing patient compliant and non patient compliant extra- and intraoral appliance as methods of distalizing maxillary first molars is desirable as well as a systematic review of the present knowledge. Furthermore, there is a need for further evaluations and knowledge about the most appropriate time to move maxillary molars distally, i.e. evaluation of movement efficiency including anchorage loss before and after eruption of second maxillary molars. The overall aim of this thesis was to evaluate the outcome measures by distalizing maxillary molars with either the conventional extraoral traction (EOA) or a intraoral fixed appliance (IOA) and also to evaluate the optimal timing of distalizing treatment – either before or after the eruption of the second maxillary molars. This thesis was based on two studies and a systematic review included in the frame story: Paper I was a randomized controlled trial involving 40 patients in orthodontic treatment. The study evaluated and compared the treatment effects of an EOA and an IOA for distal molar movement of maxillary first molars. Paper II was a retrospective study involving 40 patients evaluating the maxillary molar distalization and anchorage loss in two groups, one before (MD 1 group) and one after eruption of second maxillary molars (MD 2 group). The systematic literature search was made in 4 different databases to determine what appliances for distal molar movement of maxillary molars have been evaluated in an evidence based manner and with focus on the most efficient method and outcome of molar movement and anchorage loss. Also, the evidence-based standard of Paper I and II was evaluated. These conclusions were drawn: • The IOA was more effective than the EOA to create distal movement of maxillary first molars, and thus, for the clinician the IOA is the most favourable method. • Moderate and acceptable anchorage loss was produced with the IOA implying increased overjet whereas the EOA created decreased overjet. • The two appliances did not have any considerable corrective effect on Class II skeletal relationships and these appliances shall therefore only be used in cases of moderate dental sagittal discrepancies and arch-length deficiencies. • The most opportune time to move maxillary first molars distally is before eruption of the second molars, since molar movement is then most effective and the anchorage loss lesser. • There is limited level of evidence that intraoral appliance is more efficient than extraoral to create distal movement of maxillary molars and that anchorage loss was produced with the intraoral appliance. • It is still difficult to draw any conclusions as to which of the intraoral appliances that were the most effective, and therefore, more RCTs are desireable.
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Barbieri, Damon. "A Reproducible Method to Assess Aligner Thickness Effect on Force Output." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/108572.
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Oral BiologyM.S.
The relationship between applied force and aligner thickness is poorly understood. Therefore, the aims of the present study were to: 1) Evaluate the effect of initial material thickness on force output of clear aligners; and 2) Recommend a consistent, repeatable method for measuring aligner cross-section and distribution. A total of 40 clear aligners were fabricated over stereolithographic (SLA) models with ideal dentition, using proprietary gRxh material in four different thicknesses: (10) Rx15 [0.015h], (10) Rx20 [0.020h], (10) Rx30 [0.030h], (10) Rx40 [0.040h]. For measuring initial force output when tipping a tooth, a custom-made force measurement apparatus (FMA) was used with the upper right central incisor translated facially 0.25 mm. All six components of force and torque were measured (Fx, Fy, Fz, Tx, Ty, Tz) over a 16 second period of time upon seating each aligner. After gathering FMA data, cross-section and distribution of aligner material thickness was then measured using three methods for comparison: hall effect transduction, computed tomography (CT) scanning, and cross-sectional analysis under a stereomicroscope. All measurements were taken along the mid-sagittal plane of the facial surface of the upper right central incisor. Force output and variability both generally increased with an increase in material thickness. The range of measured forces were 3.5 to 28 times higher than ideal tipping forces reported by Proffit. The results for lingual force correlated well with those of total force (ã(Fx)2 + (Fy)2 + (Fz)2). As for the thickness measurement results, the hall effect transducer (HET) data correlated well with that of the CT scan. The stereomicroscope produced values that were relatively elevated. Mean measurements taken with both HET and CT consistently got smaller when moving from occlusal to middle to gingival points. The same trend was noted with the stereomicroscope, but with less consistency. The thinner Rx15 material appeared best suited for lingual tipping of a maxillary central incisor in vitro. The hall effect transducer produced simple measurements that were extremely similar to those from the CT scan, and appears to be a suitable stand-in for the more expensive and labor intensive CT scanning process.
Temple University--Theses
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Stewart, Daniel. "Bonding Orthodontic Brackets to Stainless Steel Crowns." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1695.
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The purpose of this study was to compare shear bond strengths of brackets bonded to stainless steel crowns using various orthodontic adhesives and surface conditioning techniques. One hundred and twenty mandibular first molar stainless steel crowns were randomly divided into groups: (1): Aluminablasting + Metal Primer + Assure; (2): Aluminablasting + Silane Coupling Agent + Transbond; (3): Diamond Bur Abrasion + Metal Primer + Assure; (4): Diamond Bur Abrasion + Silane Coupling Agent + Transbond; (5: control): Acid Etching + Metal Primer + Assure; (6: control): Acid Etching + Silane Coupling Agent + Transbond. Bond strength was tested using a universal testing machine. Both aluminablasting and diamond bur abrasion surface preparation techniques, when used in conjunction with metal primer and Assure bonding resin, reached clinically acceptable bond strength values (9.05 and 9.30 MPa, respectively). These techniques seem to offer viable options to bond orthodontic brackets to stainless steel crowns.
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Mirman, Jennifer Lauren. "AN ASSESSMENT OF CURRENT CLINICAL ORTHODONTICS: CLINICIAN KNOWLEDGE, IDENTIFICATION AND TREATMENT PLANNING OF RESTRICTED AIRWAY." Master's thesis, Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/580484.
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Oral BiologyM.S.
Objectives: The naso- and oropharyngeal airways are influenced by a myriad of factors: jaw shape and position, tongue shape and position, lymphoid tissue, sleep apnea, chronic mouth breathing, and swallowing patterns. It is unknown if the relationships of these factors are recognized and routinely assessed in clinical orthodontics. This cross-sectional study sought to determine the proportion of participating orthodontists whom: 1) Are knowledgeable about airway restriction and its etiology, 2) Learned about these topics in post-graduate orthodontic education, 3) Consider airway restrictions in orthodontic treatment planning. Methods: A survey was administered through an online survey management platform, and sent to the email listings of 2,084 active American Association of Orthodontists (AAO) members. Survey questions are evidence-based and developed from findings in current literature. The questionnaire results were analyzed by coding and cleaning data through SAS 9.3 software. Univariate and bivariate analyses were performed to assess responses. Results: The survey received responses from 117 orthodontists. Most received their orthodontic certification from a two-year program (71.82%). The majority were knowledgeable about tongue adaptations, swallowing mechanisms, mouth breathing, and sleep apnea. Respondents were less confident about the relationship airway patency has with lymphoid tissue and with jaw position. Only half (50.51%) were taught about restricted naso- and oropharyngeal airway in post-graduate orthodontic education. A low majority, 66.32%, reported that they refer for medical consultation to the appropriate clinician before they begin treatment if a patient presents with restricted airway. Conclusions: Although the majority of respondents are knowledgeable about factors that influence airway patency, the survey identified areas in which understanding of and education in certain topics (lymphoid tissue, jaw position) may be lacking. Further emphasis should be placed on these topics to improve patient care. Orthodontics nationwide would benefit from more thorough post graduate orthodontic residency curriculum and general guidelines for clinical management of patients that present with airway obstruction.
Temple University--Theses
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Gladwell, Jason Thomas. "Concurrent Whitening and Orthodontic Treatment." VCU Scholars Compass, 2007. http://scholarscompass.vcu.edu/etd/1469.
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The aim was to evaluate whether a whitening system, when used during the final stages of orthodontics, would yield results comparable to whitening alone. Patients were assigned to either the control (n=20) or experimental (n=26) groups. At T1, patients were given a ten day supply of Trèswhite⢠by Opalescence®, instructions on use, and initial shade determination was made and photographs were taken. At T2 and T3, shade determination was accomplished and updated photographs were taken. Whitening of the teeth occurred in both groups on average, but significantly more whitening was experienced in the experimental group (p < 0.004). An average of 87% of teeth whitened during orthodontic treatment compared to 97% of control teeth (p < 0.01) were judged to be uniform in appearance. In conclusion, the data do not contraindicate the concurrent accomplishment of teeth whitening during orthodontic treatment.
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Horsley, Bryan P. "Appointment Keeping Behavior of Medicaid vs. Non-Medicaid Orthodontic Patients." VCU Scholars Compass, 2004. http://scholarscompass.vcu.edu/etd/1521.
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State Medicaid programs were established to care for the poor by eliminating financial barriers and increasing their ability to be treated within the mainstream of the heath care system. The number of children eligible for Medicaid services is increasing, yet the number of Medicaid providers remains low. Health care providers cite failed appointments as being a major problem with Medicaid patients and one of the largest deterrents to participating. The purpose of this study was to determine whether a difference in appointment keeping behavior exists between Medicaid and non-Medicaid orthodontic patients. During a twelve-month period, a tally of appointments was kept for 707 active patients at Virginia Commonwealth University's Department of Orthodontics. Patients were categorized as either Medicaid or non-Medicaid and their appointment keeping behavior was evaluated. The results revealed that a significant difference does exist in the number of failed appointments between the groups (P<0.0001). The Medicaid patients failed 247(15.4%) of 1609 appointments and non-Medicaid patients failed 367(8.3%) of 4438 appointments. Additionally, these data show that although Medicaid patients accounted for only 26.6% of all appointments, they were responsible for about 40% of all appointment failures. The findings from this study support the concern among dental practitioners that Medicaid patients have higher rate of appointment failures than non-Medicaid patients.
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Lu, Hung Quoc. "Lip profile preferences of Asian Americans." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2179.
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The aim of this study was to evaluate how Asians, non-Asians, and orthodontists in America view esthetic soft tissue Asian lip profiles. The null hypothesis was that there was no difference in the perception of lip profile esthetics of Asian patients between Asian laypersons, non-Asians laypersons, and orthodontists. A survey was constructed using the profile photographs of one adult male and one adult female Asian American patient taken from the VCU Orthodontics Clinic records. Using Dolphin Imaging 3D, the original photographs were digitally altered. The lips in each photograph were moved in increments forward and backwards to produce 5 images (-4mm, -2mm, 0mm, 4mm, 8mm). Only the lips were modified. Each evaluator was asked to rank, from 1 to 5, each collection of photographs where 1 was most preferable and 5 was least preferable. There were a total of 10 survey questions. The survey was administered to 111 Asian Americans, 115 Caucasians, and 389 Orthodontists. Results suggested that all three groups were similar in their assessment. A retrusive lip profile for the Asian male was preferred, and a slightly protrusive lip profile for the Asian female was preferred across all groups. Generally, orthodontists preferred slightly more retrusive lips compared to the other two groups. The groups of evaluators that showed statistical differences were Chinese and Filipino laypersons. Cluster analysis also revealed tremendous variation in the results, giving credence to the belief that individual patient preference should be assessed in addition to understanding social norms.
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Miettunen, Katie Elizabeth. "Multidisciplinary assessment of orthodontic treatment outcome for the adult mutilated dentition." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/202771.
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Oral BiologyM.S.
Orthodontic treatment in the adult is not new. Until lately, the challenges of treating the adult patient kept their numbers low. Over the last thirty years, however, there has been a steady increase in the prevalence of adults seeking orthodontic treatment. Many adults present with a mutilated dentition that often require a multidisciplinary approach for optimal treatment outcomes. Currently, guidelines for the evaluation of adult orthodontic treatment outcomes do not exist. The purpose of this study was to determine which factors are considered most important for the evaluation of the quality of adult orthodontic treatment outcome of patients with a mutilated dentition by practicing orthodontists, periodontists, and restorative dentists. In this study, orthodontists, periodontists, and restorative dentists examined the records of ten adult patients in the mutilated dentition who received orthodontic treatment at Temple University in the Department of Orthodontics. This study was approached from both a quantitative and qualitative perspective. Two surveys were used to collect the data. One survey used a visual analogue scale to measure the overall result, occlusion, buccal bone height, periodontal health, restorability, case difficulty, and the amount of influence of the American Board of Orthodontics (ABO) standards when judging the cases. A second survey was used to determine if the examiner was ABO certified and asked a series of open-ended questions related to orthodontic treatment outcome. Based on the data collected, the following conclusions were drawn: 1. Orthodontists, periodontists, and restorative dentists are consistent in their rating of orthodontic treatment outcome. 2. Periodontists and restorative dentists rate overall case finish and posttreatment occlusion higher than orthodontists. 3. When evaluating case finish, orthodontists tend to blend what is optimal as described by the guidelines of the American Board of Orthodontics with what is reasonably achievable for the patient. 4. Orthodontists, periodontists, and restorative dentists rate the following five factors to be most important when evaluating orthodontic treatment outcome: esthetics, occlusion, restorability, periodontal health, and stability. 5. Orthodontists, periodontists, and restorative dentists rate esthetics as the most important factor to use for evaluating orthodontic treatment outcome. The data suggest that adult patients with mutilated dentitions can pursue orthodontic treatment and achieve an excellent result. Teamwork among all dental specialists providing treatment is essential for multidisciplinary treatment. Treatment goals among all providers must be aligned to reach the ultimate treatment goals.
Temple University--Theses
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Real, Figueroa Sergio Enrique. "Accuracy of Slot Dimension within Sets of Orthodontic Buccal Tubes." Thesis, NSUWorks, 2017. https://nsuworks.nova.edu/hpd_cdm_stuetd/73.
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Objective: This study aims to evaluate the dimensional precision of orthodontic buccal tubes slots from different orthodontic companies using the Scanning Electron Microscope (SEM). Methods: Four of the most popular orthodontic companies within the US who manufacture and distribute molar tubes to orthodontists were selected for this study including Opal (Ultradent), Ormco(Damon), American Orthodontics and 3M Unitek. Each company was asked to send 20 molar tubes, 022 slot (.0225 x .0285 inches), which have been manufactured within the past 2 months to be used in this study. We measured the accuracy of individual tube dimensions in relation to their respective company catalogs, as well as document any defects observed within these tubes. Descriptive statistics, means and standard deviations were calculated for all buccal tubes from the four companies and for each wall of the respective tubes. In the first analysis, a 1-way ANOVA with Bonferroni pairwise comparisons was conducted, using a level of significance of 0.05. A box-plot was included to illustrate these variables. In the second analysis, the measurements relating to dimensions of tubes were compared with the acceptable parameters of the .0225 x .0285 inches slot. This comparison was conducted using Fisher's exact test and Cramer's V test (Correlation), using a level of significance of 0.05. Pie charts were used to illustrate the percentiles of tubes with dimensions that fall within the acceptable parameters of .0225 x .0285 slot. Results: All four companies produced slots that were on average over-sized. There was no consistency in meeting the standards of dimensions when comparing each of the four walls for each company. However, a higher percentage of American orthodontics and 3M tubes met the standards of measurement of the occlusal and gingival walls. All tubes were convergent from mesial to distal and lingual to buccal direction. Conclusions: All companies manufactured over-sized tubes.There was no consistency in dimensional accuracy of tubes produced by any of the four companies. All tubes were convergent from mesial to distal and lingual to buccal dimension.
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Nordstrom, Barrett Kyle. "Comparison of Niti and TiNbTaZr Archwires During Initial Orthodontic Alignment." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1489752104804558.
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Poole, Morris. "Efficacy of Orthodontic Bonding Agents in Preventing Demineralization Around Brackets." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2178.
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Enamel demineralization is a concern in orthodontic patients with poor oral hygiene. To curtail this problem, amorphous calcium phosphate (ACP) containing adhesives have been developed. The purpose of this in vitro study was to evaluate the cariostatic potential of an ACP containing orthodontic bonding agent adjacent to brackets. Sixty human molars were randomly distributed into: ACP adhesive, resin modified glass ionomer cement (RMGIC), and conventional composite resin groups (N=20 each). Brackets were bonded following the manufacturer’s instructions. Tooth enamel through a 2mm window around the brackets was cycled in demineralization (6 hrs) and remineralization (18 hrs) solutions. After 14 days, teeth embedded in resin and were sectioned. Knoop indentations were performed to determine enamel hardness. There were no statistically significant differences between the control and experimental groups. However, both Fuji Ortho LC (RMGIC), and Aegis Ortho (ACP) showed a trend toward a reduction in demineralization. In addition, it was also shown that the initial acid etching of the enamel significantly reduces enamel hardness.
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Shipley, Thomas S. "The effect of argon laser irradiation on reducing enamel decalcification during orthodontic treatment an in vitro and in vivo study /." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3883.
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Thesis (M.S.)--West Virginia University, 2005.Title from document title page. Document formatted into pages; contains x, 243 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 128-139).
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Ivanov, Pavel. "Investigation of diode laser debonding of ceramic orthodontic brackets." Thesis, NSUWorks, 2012. https://nsuworks.nova.edu/hpd_cdm_stuetd/52.
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A thesis submitted to the College of Dental Medicine of Nova Southeastern University of the degree of Master of Science in Dentistry.
ABSTRACT The significance of this research was to identify the optimal techniques to remove ceramic orthodontic appliances in order to prevent tooth-enamel fracture, pain, and esthetic complications. Discomfort and pain are common occurrences during orthodontic appliance removal. In debonding (bracket removal) appointments, less force, measured as reduced shear bond strength (SBS) is preferable because greater force creates more discomfort and pain. In a previous study, 24.3% of patients reported pain when metallic brackets were removed using a ligature-cutting plier, compared to 12.8% of patients reporting pain when a lift-off instrument was employed. These previous findings demonstrate the need to investigate new debonding removal methods which have less SBS to help reduce the pain experienced by orthodontic patients. Some recent studies have reported that orthodontic bracket debonding causes inevitable damage to the enamel surface. The debonding of ceramic orthodontic brackets can increase the risk of enamel damage. The application of heat to help debond a bracket can increase the temperature of the pulp chamber; this could injure pulp cells and threaten the long term vitality of the affected tooth. The purpose of this in-vitro study was to evaluate the safety and effectiveness of using a diode laser for the debonding of ceramic brackets in relation to the amount of debonding force required, the risk of direct force impact on enamel, and the risk of causing an adverse temperature increase inside the pulp chamber. The central hypothesis I investigated was that using a diode laser would facilitate the debonding of ceramic brackets by decreasing the SBS, increase the adhesive remnant index (ARI), and avoid causing an adverse temperature increase in the pulp chamber. I investigated these parameters with the goal of establishing an effective and safe protocol for debonding ceramic brackets. At present no guidelines exist, I recognized that guidelines are needed for using a diode laser to debond brackets in relation to the power level and duration of lasing. This study tested two types of ceramic brackets; a monocrystalline bracket called Radiance and polycrystalline ceramic bracket called Clarity. These brackets were selected because they are widely available and in common use. The experimental brackets were monocrystalline and polycrystalline: the laser power settings and lasing times were; negative control (not lased), lased at 2.5 watts for 3 and 6 seconds, and lased at 5.0 watts for 3 and 6 seconds. The diode laser treatments had little effect on the debonding SBSs for the removal of the Radiance monocrystalline brackets. Alternatively, the debonding of the Clarity polycrystalline brackets with laser treatment using 2.5 watts for 6 seconds, 5.0 watts for either 3 seconds or 6 seconds reduced the SBS. The debonding of the Radiance monocrystalline brackets with laser treatment using 2.5 watts for 3 seconds, and 5.0 watts for 6 seconds increased the ARI. The debonding of the Clarity polycrystalline brackets with laser treatment using 2.5 watts for 6 seconds, 5.0 watts for 3 seconds and 6 seconds increased the ARI. The increase in pulp chamber temperature likely to cause thermal injury to the pulp cells was measured against Zack and Cohen¡¯s in vivo standards (2.2¢ªC and, 5.5¢ªC).30 When compared to the 2.2¢ªC standard; the debonding of Radiance monocrystalline brackets with laser treatment using 2.5 watts for 3 seconds were within the standard, and the debonding of Clarity polycrystalline brackets using 2.5 watts for 3 seconds was cooler. When compared to the 5.5¢ªC standard, the debonding of Clarity polycrystalline brackets using 2.5 watts for 6 seconds was cooler. The research results showed that using a diode laser for debonding at 2.5 watts for 6 seconds decreased the SBS for Clarity polycrystalline brackets (reduced the force needed for debonding), increased ARI for Clarity polycrystalline brackets (increased adhesive on enamel), and did not increase the pulp chamber temperature by an injurious amount. The difference in the debonding SBS, ARI and pulp chamber temperatures of the two bracket types probably arose because of the difference in the designs of the two bracket pads. My research results demonstrate the long-term need to design brackets with pads which can be removed easily with a diode laser, leave more adhesive on enamel, and that do not cause injurious temperature increases within the pulp chamber. My research results also demonstrate why guidelines for bracket debonding using diode lasers are needed, which limit the power setting and lasing times. The debonding of brackets using diode lasers could benefit orthodontic patients and become more common if it can reduce the risk of tooth fracture, lower the sensation of pain, reduce the amount of enamel damage, and maintain the vitality of teeth in future studies.
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Lill, Daniel J. "Importance of Pumice Prophylaxis for Orthodontic Bonding with Self-etch Primer: An in vivo Study." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1220.
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Self-etching primers (SEP) have recently simplified the orthodontic bonding process and questions have arisen regarding their reliability and efficiency. The goal of this study was to assess the importance of a pumice prophylaxis prior to bonding with SEP (Transbond Plus, 3M Unitek, Monrovia, CA) in reducing bond failures. Thirty orthodontic patients volunteered to participate in this split-mouth prospective clinical trial. A pumice prophylaxis experimental group and a non-pumice control group of teeth were randomly assigned in a contralateral quadrant pattern within each patient. A total of 508 teeth were bonded and monitored over 3 months for bond failures. There were 35 total failures (6.9%) with 6 (2.4%) in the pumice group and 29 (11.4%) in the non-pumice group. Bond failures were compared as a total number between groups and also as the number of patients who experienced bond failures with each method using Chi-square analysis. There were statistically significant differences both in the total number of bond failures (P < .001) and in the number of patients with bond failures between groups (P < .01). A significantly lower and clinically acceptable bond failure rate was demonstrated when using Transbond Plus SEP after pumice prophylaxis. This study produced strong evidence to suggest the need for pumice prophylaxis in orthodontic bonding when using SEP.
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Griffith, Mary M. "Comparison of two Invisalign tray generations using the Peer Assessment Rating (PAR) Index." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1583413744283131.
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Podray, Brad Andrew. "An Ethical Critique of the AAO Principles of Ethics and Code of Professional Conduct." Master's thesis, Temple University Libraries, 2010. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/110206.
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Oral BiologyM.S.
The American Association of Orthodontists(AAO) adopted its Code of Ethics and Code of Professional Conduct in May of 1994. This document is meant to provide guidelines for ethical behavior amongst orthodontic professionals. Its main purpose is to protect the public from ethically unsound actions that could be committed by members of the AAO. All members of the AAO agree to abide by the Code, as stated within its preamble: "By accepting membership, all members assume an obligation of self-discipline above and beyond the requirements of laws and regulations, in accordance with these Principles." This study represents a critique of the AAO Code. As the field of medical ethics evolves, so must the documents that govern ethical behavior. The last revision took place in May of 2009 and the wording of the current document can be misinterpreted or abused. The current code leans heavily towards an Agent/Commercial model of practice, where the Orthodontist's role is influenced greatly by patient request and business ambitions. The purpose of this study was to utilize accepted schools of thought in ethical literature to do the following: (1) Point out ethical flaws and weak points in the AAO Code. (2) Present corrections for the Code in order to clarify potential points of contention. These corrections will articulate rules that promote a partnership between practitioner and patient. To accomplish these goals, the Code will be analyzed, line by line, for redundancies, faults, or potential misinterpretations. Principles and Advisory Opinions which can be improved upon will be labeled as "weak." All weak statements will be reformed in a manner where the weak aspects no longer play a role in the Code. The reformed statements will promote the Partnership model of practice in favor of Agent and Commercial models. The Conclusions of the study are as follows: (1) Principle I can be improved by changing it to the following phrase: Members shall be dedicated to providing the highest possible quality orthodontic care to his/her patients within standards commensurate with the accepted science and techniques of orthodontics, the clinical aspects of the patient's condition, and with due consideration being given to the needs and desires of the doctor and patient within a relationship based on partnership. (2)Advisory Opinion IE. should be changed to the following: A second opinion should include a diagnosis and treatment plan recommended to the patient. It must be honest and focus on the facts presented. It is unethical to propound a specific technique, philosophy, training or ability as superior without presenting scientific literature, at least summarized or simplified, to the patient to support claims made. A second opinion must disclose to the patient any conflict of interest of the member providing the opinion. (3) The phrasing of Advisory Opinion IF. is made stronger with the following wording: Patients should be informed of their oral health status without disparaging comments about the patient's prior treatment.(4) The phrasing of Advisory Opinion IG. is made stronger with the following wording: Members should inform their patients of their prognosis, any proposed treatment, and any reasonable alternatives, so that the patient understands their treatment decisions.
Temple University--Theses
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Nelson, Kristin. "Orthodontic Marketing Through Social Media Networks: The Patient and Practitioners' Perspective." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3335.
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Objective: The aim of this study was to (1) assess the orthodontic patient and practitioner use and preferences of social media, and (2) to investigate the potential benefit of social media in marketing and communication strategies in orthodontic practices. Material and Methods: A survey was distributed to all participants, which included orthodontists from the American Association of Orthodontists (AAO) and patients/parents from the VCU Orthodontic Clinic and Private Practices throughout the United States. The participants were asked to answer questions related to their use of social media as well as their perceptions of usage of social media in the orthodontic practice. Results: 76% of orthodontists, 71% of the VCU Practice participants and 89% of the Private Practice participants used social media, with the highest preference for Facebook among all of the participants. Orthodontist’s posed information more often in the morning and afternoon (40% and 56%, respectively) and patients used social media mainly in the evening (76%). The most commonly used marketing strategies in the orthodontic practice were social media and a practice website (76% and 59%, respectively). Social media and practice websites were positively related to new patient starts (P=0.0376, P=0.0035, respectively). Newspapers were negatively related to new patient starts (P=0.0003). Conclusions: Social media use was more common in females and younger adults and facebook was the most commonly used social media site among all of the participants. Orthodontists posted information on social media websites mainly in the morning and afternoon, while patients spend more time on social media sites in the evening. Newspaper advertisements were negatively related to new patient starts. Facebook and Twitter were positively related to new patient starts when used as a marketing and communication tool in the orthodontic practice.
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Payne, Michael D. "Factors Influencing Applicant Ranking of Orthodontic Programs." VCU Scholars Compass, 2004. http://scholarscompass.vcu.edu/etd/1422.
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Orthodontic programs spend considerable amounts of time and energy to attract, recruit, and interview the best and brightest applicants. Applicants and programs submit ranked preferences, and resident positions are filled by a computerized matching system (Match). The specific aims of this study were to determine the relative importance of certain factors in applicants' Match ranking of orthodontic programs and to determine differences between orthodontic Program Directors perceptions and actual factors cited by applicants influencing their ranking of orthodontic programs.Surveys were mailed to 55 orthodontic Program Directors and 478 applicants participating in the 2002 orthodontic Match. Forty-nine Program Director (89%) and 224 applicant (47%) surveys were returned. Rankings and importance of factors cited by applicants in their decision-making process and perceptions of those factors cited by Program Directors were compared.Applicants' top three factors were: "satisfied current residents," "multiple techniques taught," and "good quality of clinical facility." Program Directors' perceived top three factors were: "satisfied current residents," "good program reputation," and "good impression of current residents at interview." Comparing Program Directors perceptions versus applicants' factors overall, the two groups were statistically different (P Despite these differences, there was generally a high level of overall agreement between Program Directors perceptions and factors actually influencing applicants' ranking of orthodontic programs.
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Prettyman, Chase. "Self-Ligating vs. Conventional Brackets as Perceived by Orthodontists." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2183.
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Introduction: Within the past decade, significant developments, new designs, and numerous proposed advantages of self-ligating (SL) brackets have caused them to gain great popularity among practicing orthodontists. The purpose of this study was to determine if there are significant clinical differences between SL and conventional brackets on orthodontic treatment as perceived by practicing orthodontists, and more specifically, if the proposed advantages of SL brackets are evident in clinical practice. Methods: A survey was developed to evaluate how SL brackets compare to conventional brackets when perceived by practicing orthodontists (n=430). The initial series of questions focused on individual practitioner characteristics and the clinician’s experience with SL brackets, while the second part of the survey allowed the orthodontists to indicate a preference for either SL or conventional brackets in regard to a variety of treatment factors. Results: Most of the responding orthodontists (90%) had experience using SL brackets in clinical practice. SL brackets were preferred for the majority of orthodontic treatment factors, and were most significantly indicated as having shorter adjustment appointments (P <0.0001), providing faster initial treatment progress (P <0.0001), and were the most preferred bracket during the initial alignment stage of treatment (P <0.0001). On the other hand, practitioners reported a stronger preference for conventional brackets during the finishing and detailing stages of treatment (P <0.0001), and regarded conventional brackets as being significantly more cost effective than SL brackets (P <0.0001). Less emergency appointments were also reported with conventional brackets compared to SL brackets (P <0.0001). Despite the perceived overall preference for SL brackets, more than one-third of practitioners no longer use or are planning on discontinuing use of SL brackets. In many circumstances, the orthodontists’ bracket preference was significantly influenced by the proportion of patients they treated with SL brackets (P <0.0001), the number of cases it took them to become accustomed to SL brackets (P <0.0001), and their average appointment intervals for both SL brackets (P <0.0001) and conventional brackets (P = 0.0002). Conclusion: Overall, the orthodontists participating in this study reported a perceived difference between SL brackets and conventional brackets on orthodontic treatment. SL brackets were found to be preferred for the majority of the treatment factors, while there were a few situations in which conventional brackets were preferred. Ultimately, due to the lack of high-quality evidence supporting SL brackets, more objective, evidence-based research is essential in order to evaluate definitively the clinical differences of SL and conventional brackets on orthodontic treatment.
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Peck, Sheldon L. "Orthodontic Faculty Recruitment and Retention: Goals and Perceptions." VCU Scholars Compass, 2003. http://hdl.handle.net/10156/1406.
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