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Fergus, Kelly-Gwynne Mason. "Esthetic evaluation of edgewise orthodontic treatment in matched class II, division 1 subjects, with and without a MARA." View the abstract Download the full-text PDF version, 2008. http://etd.utmem.edu/ABSTRACTS/2008-022-Fergus-index.html.
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Thesis (M.S. )--University of Tennessee Health Science Center, 2008.Title from title page screen (viewed on July 30, 2008). Research advisor: Edward F. Harris, Ph.D. Document formatted into pages (xi, 174 p. : ill.). Vita. Abstract. Includes bibliographical references (p. 103-112).
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Vargas, Deborah Bayer Ferraz. "Estudo comparativo da retenção das bandas ortodônticas Grip Tite, convencional e convencional com a superfície interna microjateada por óxido de alumínio /." Araraquara : [s.n.], 2007. http://hdl.handle.net/11449/95778.
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Orientador: Lídia Parsekian MartinsBanca: Dirceu Barnabé Raveli
Banca: Ana Cláudia de Mello
Resumo: O objetivo do presente trabalho foi avaliar in vitro, por meio de um ensaio mecânico, a força necessária para a remoção das bandas ortodônticas Grip Tite (C), Convencional (A) e banda Convencional com a superfície interna microjateada por óxido de alumínio (B). Também analisar visualmente a quantidade de cimento residual, e classificar usando uma escala de incrementos a 25%. Após, verificar, por meio de MEV, a superfície com melhores características para a retenção. Os resultados obtidos mostraram que a média de carga do Grupo B, bandas microjateadas internamente por óxido de alumínio, foi significantemente maior que as médias dos Grupos A, bandas Convencionais, e C, bandas Grip Tite. Quanto a quantidade de cimento remanescente nas bandas, o Grupo B apresentou 100% das bandas com índice 4, indicando a presença de mais de 75% de cimento residual nas bandas, enquanto que nos Grupos A e C, houve a predominância do índice 1, indicativo de menos de 25% de cimento residual nas bandas, sem diferença significativa entre esses dois grupos. Os resultados foram confirmados pela MEV, onde observou-se uma superfície com melhores características para a retenção do cimento nas bandas onde foi realizado o processo de microjateamento. Conclui-se que o processo de microjateamento por óxido de alumínio, na superfície interna das bandas convencionais, aumenta a força necessária para a remoção das bandas e aumenta a quantidade de cimento residual preso à superfície da banda. Quando analisada pela MEV, essa superfície apresenta-se como a mais áspera e rugosa, com a maior quantidade de cimento de ionômero de vidro aderido à banda.
Abstract: The purpose of this study was to evaluate in vitro, the necessary force for the removal of Grip Tite, Conventional and Sandblasted orthodontics molar bands, as well as, to analyze and to classify the amount of residual cement in the internal surface of these bands. After that, checking through scanning electron microscopy, the surface with better characteristics for the retention. The obtained results showed that the load average of the group B, Sandblasted bands, was significantly higher than the group A, Conventional bands, and C, Grip Tite bands. Observing the amount of remaining cement in the bands, group B presented 100% of the bands with index 4, indicating the presence of more than 75% of residual cement in the bands, while in the groups A and C, had the predominance of index 1, indicative of less than 25% of residual cement in the bands, without significant difference between these two groups. The results were confirmed by the scanning electronic microscopy, where the surface with better characteristics for the retention of the cement was observed, in the bands where the sandblasted process was carried through. It was concluded that the process of sandblasted, in the internal surface of the conventional bands, increases the necessary force for the removal of the bands and increases the amount of residual cement in the internal surface of the band. When analyzed by the scanning electronic microscopy, this surface appeared rougher and corrugated, with great amount of glass ionomer cement adhered to the band.
Mestre
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Porter, Jason L. "Comparison of intraoral and extraoral scanners on the accuracy of digital model articulation." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4881.
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Introduction: Orthodontists increasingly rely on digital models in clinical practice. The ability of modern scanners to articulate digital models must be scientifically evaluated. Methods:Twenty five digital articulated models were produced from four digital scanners in five experimental groups. The resulting inter-arch measurements were compared to the gold standard. An acceptable range of 0.5mm more or less than the gold standard was used for evaluation. Results: iTero® and iTero® Element yielded all acceptable inter-arch measurements. The 3M™ True Definition and Ortho Insight 3D® with Regisil® bite registration produced four of six acceptable inter-arch measurements. The Ortho Insight 3D® with Coprwax ™ bite registration yielded three of six acceptable inter-ach measurements. Conclusions: The iTero® and iTero® Element produced the most accurately articulated models. The 3M™ True Definition and Ortho Insight 3D® with Regisil® were the next most accurate. The Ortho Insight 3D® scanner with Coprwax ™ was the least accurate method tested.
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Du, Raan Frederick Johannes. "Influence of orthodontic caregiver behaviour on the perceived satisfaction of patients during orthodontic treatment." Thesis, University of the Western Cape, 2014. http://hdl.handle.net/11394/4247.
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Magister Scientiae Dentium - MSc(Dent)Influence of orthodontic caregiver behaviour on the perceived satisfaction of patients during orthodontic treatment. Dr. F.J. du Raan M.Sc. (Orthodontics) thesis, Department of Orthodontics, University of the Western Cape. In this thesis I interviewed patients that are busy with orthodontic treatment, as well as those that have undergone orthodontic treatment at the department of Orthodontics at the University of the Western Cape, with the aid of four questionnaires. Patients completed questionnaires to provide general and demographic information, quantify their satisfaction with the orthodontic treatment process, their perception of the orthodontic clinician's behavioural traits and lastly they completed the NEO-FFI personality questionnaire to determine their own personality profile. All these questionnaires were used in previous studies, or they were slightly modified to be applicable to orthodontics. The information gained was used to determine if there are correlations between the patient’s perceived satisfaction of the treatment process with patient specific treatment variables (as acquired from the General information and Demographics Questionnaire ), demographic factors, clinician's behavioural traits and patient specific personality traits and any combination of the above mentioned. We wanted to determine which behavioural traits of the orthodontic caregiver influences the perceived satisfaction with the treatment to the greatest extent. Furthermore, we wanted to determine if certain personality traits of the patients would influence their perceived satisfaction with the treatment process or their perception of the clinician's behavioural traits. The only aspect from the General Information and Demographics Questionnaire that had any correlation to satisfaction with the treatment process or the perception of the clinician's behavioural traits, was whether the patient was treated by a single registrar or multiple registrars. Patients treated by multiple clinicians had a lower average score for satisfaction and orthodontist behaviour. Results from the study shows that all the clinician's behavioural traits do have statistically significant influence on the perceived satisfaction with the treatment process, but certain behavioural traits have a greater influence. Result showed Empathy and Care to have the strongest influence on perceived satisfaction, whereas Motivation has the lowest influence. The NEO-FFI personality questionnaire was used to register each patient's personality profile. Scoring for the following personality traits created the personality profile: Neuroticism, Extraversion, and Openness to Experience, Conscientiousness and Agreeableness. Patient personality profiles were shown to have no significant influence on the patient's perceived satisfaction with the treatment process.Neuroticism was shown to have a weak negative correlation with the Professionalism sub-category of the Orthodontic Clinician Behaviour Questionnaire. Conscientiousness has been shown to have a weak positive correlation with all categories of the Orthodontic Clinician Behaviour Questionnaire It is put forth by the researcher that more time and effort has to be put into improving all aspects of the clinician's behaviour, as it will positively influence the perceived satisfaction of the orthodontic treatment process.Even though there are no significant correlations, patients needs to be screened to determine their personality profiles, as this may lead to slight improved scoring on certain behavioural aspects which may in turn lead to greater patient satisfaction. It may be especially worthwhile to recognise the neurotic patient and treat them on a more personal level, as this may improve their overall satisfaction.
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Tse, Lap Kee Edmond. "A comparative study of the skeletal and dental effects of a modified herbst and the traditional herbst appliances in Southern Chinese a prospective cephalometric study /." Click to view the E-thesis via HKUTO, 1994. http://sunzi.lib.hku.hk/HKUTO/record/B38628454.
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Almandaey, Abdulhakim Ahmad Q. A. "Surgical exposure, bonding and orthodontic traction of impacted maxillary anterior teeth a retrospective study /." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39766135.
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Almandaey, Abdulhakim Ahmad Q. A. "Surgical exposure, bonding and orthodontic traction of impacted maxillary anterior teeth: a retrospectivestudy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39766135.
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Vaughan, Peter Powell. "Evaluation Of Orthodontic Positioners." Thesis, Faculty of Dentistry, 1986. https://hdl.handle.net/2123/4614.2.
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Tooth positioners are held in high regard by many prominent orthodontists. The literature has many references to the excellent results produced by tooth positioners. For the Begg 'lightwire technique, tooth positioners are considered the best form of retention (Begg 8 Kesling, 1977). However, there has been no clinical evaluation of the tooth positioner in comparison to conventional retainers.
The aim of this thesis is to present a method of evaluating post orthodontic treatment occlusal changes in patients who wore either a tooth positioner or a conventional retainer. The conventional retainer used in this study is of the form recommended by Begg and has come to be known in Australia as the “Begg retainer". l have therefore used the term “Begg retainer" in this thesis. Post orthodontic treatment changes were evaluated by assessing the number of inter-occlusal contacts when the jaws where clenched together in maximum intercuspation. I considered that if the Begg retainer and tooth positioner had differing effects, then it would be reflected in assessing the change in the number of occlusal contacts.
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謝立祺 and Lap Kee Edmond Tse. "A comparative study of the skeletal and dental effects of a modified herbst and the traditional herbst appliances in Southern Chinese: a prospective cephalometric study." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B38628454.
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Trohatos, Emily. "An evaluation of changes to the referral base of one orthodontic specialist over a 24-year period." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0005/MQ41641.pdf.
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Vargas, Deborah Bayer Ferraz [UNESP]. "Estudo comparativo da retenção das bandas ortodônticas Grip Tite, convencional e convencional com a superfície interna microjateada por óxido de alumínio." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/95778.
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O objetivo do presente trabalho foi avaliar in vitro, por meio de um ensaio mecânico, a força necessária para a remoção das bandas ortodônticas Grip Tite (C), Convencional (A) e banda Convencional com a superfície interna microjateada por óxido de alumínio (B). Também analisar visualmente a quantidade de cimento residual, e classificar usando uma escala de incrementos a 25%. Após, verificar, por meio de MEV, a superfície com melhores características para a retenção. Os resultados obtidos mostraram que a média de carga do Grupo B, bandas microjateadas internamente por óxido de alumínio, foi significantemente maior que as médias dos Grupos A, bandas Convencionais, e C, bandas Grip Tite. Quanto a quantidade de cimento remanescente nas bandas, o Grupo B apresentou 100% das bandas com índice 4, indicando a presença de mais de 75% de cimento residual nas bandas, enquanto que nos Grupos A e C, houve a predominância do índice 1, indicativo de menos de 25% de cimento residual nas bandas, sem diferença significativa entre esses dois grupos. Os resultados foram confirmados pela MEV, onde observou-se uma superfície com melhores características para a retenção do cimento nas bandas onde foi realizado o processo de microjateamento. Conclui-se que o processo de microjateamento por óxido de alumínio, na superfície interna das bandas convencionais, aumenta a força necessária para a remoção das bandas e aumenta a quantidade de cimento residual preso à superfície da banda. Quando analisada pela MEV, essa superfície apresenta-se como a mais áspera e rugosa, com a maior quantidade de cimento de ionômero de vidro aderido à banda.
The purpose of this study was to evaluate in vitro, the necessary force for the removal of Grip Tite, Conventional and Sandblasted orthodontics molar bands, as well as, to analyze and to classify the amount of residual cement in the internal surface of these bands. After that, checking through scanning electron microscopy, the surface with better characteristics for the retention. The obtained results showed that the load average of the group B, Sandblasted bands, was significantly higher than the group A, Conventional bands, and C, Grip Tite bands. Observing the amount of remaining cement in the bands, group B presented 100% of the bands with index 4, indicating the presence of more than 75% of residual cement in the bands, while in the groups A and C, had the predominance of index 1, indicative of less than 25% of residual cement in the bands, without significant difference between these two groups. The results were confirmed by the scanning electronic microscopy, where the surface with better characteristics for the retention of the cement was observed, in the bands where the sandblasted process was carried through. It was concluded that the process of sandblasted, in the internal surface of the conventional bands, increases the necessary force for the removal of the bands and increases the amount of residual cement in the internal surface of the band. When analyzed by the scanning electronic microscopy, this surface appeared rougher and corrugated, with great amount of glass ionomer cement adhered to the band.
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Sousa, Meire Alves de. "Analise eletromiografica dos musculos masseter, temporal e orbicular da boca em jovens com maloclusão classe II, 1ª divisão dentaria, apos o uso de aparelho extrabucal de tração occipital." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290212.
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Orientador: Vania Celia Vieira de SiqueiraTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: A eletromiografia de superfície representa um importante instrumento de avaliação da função muscular. No entanto, apresenta limitações, devido à grande variabilidade que ocorre na amplitude do sinal eletromiográfico obtido. Com o intuito de diminuir essa variabilidade, sugere-se a normalização dos dados coletados, que consiste na divisão do sinal eletromiográfico bruto registrado por um valor de referência, expresso em porcentagem, derivado da própria medida do sinal eletromiográfico. Objetivou-se neste estudo avaliar, por meio da eletromiografia, a ocorrência de alterações na atividade eletromiográfica da porção superficial do músculo masséter, da porção anterior do músculo temporal e dos segmentos superior e inferior do músculo orbicular da boca, bilateralmente, em 25 jovens, entre 8 e 10 anos de idade, com maloclusão Classe II, 1ª divisão dentária, após se submeterem ao tratamento ortodôntico com o aparelho extrabucal, comparando-os com um grupo de 25 jovens com oclusão normal, com idade similar. Além de avaliar se o procedimento de normalização dos dados obtidos influencia no resultado final. Para a captação dos sinais eletromiográficos dos músculos masséter e temporal utilizou-se eletrodos de superfície ativos diferenciais simples, e para o músculo orbicular da boca, eletrodos de superfície passivos de Ag/AgCl. Realizou-se a coleta do sinal na situação de repouso, na contração isométrica e na contração isotônica, antes e após o tratamento ortodôntico no grupo com maloclusão e em períodos similares no grupo com oclusão normal. Por meio de software específico, determinou-se o valor da Root Mean Square (RMS) de cada movimento realizado. Submeteu-se os dados iniciais coletados à normalização, comparando-os com os dados iniciais originais, por meio da análise de variância (ANOVA) para parcelas subdivididas Os resultados demonstraram que o procedimento de normalização influenciou a interpretação dos dados ao suprimir as diferenças existentes entre os grupos, reforçando a idéia de que os resultados originais permitiram conclusões mais adequadas do que os dados normalizados. Com base nesses resultados, optou-se pela utilização dos dados originais para avaliar o efeito do tratamento ortodôntico no grupo com maloclusão. Nesta etapa utilizou-se a ANOVA para medidas repetidas com modelos mistos e o teste de Tukey (a=0,05). Observou-se que ocorreu uma diminuição na atividade eletromiográfica de todos os músculos do grupo com maloclusão e com oclusão normal, entretanto esta diferença não apresentou-se estatisticamente significante para o músculo temporal direito e orbicular da boca, segmento superior. Na fase inicial do estudo o grupo com maloclusão apresentou maior atividade elétrica em todos os músculos do que o com oclusão normal, no entanto, essa diferença não apresentou-se significante para o músculo masséter. Não ocorreram diferenças significativas entre os grupos na fase final do experimento. Concluiu-se que o tratamento com o aparelho extrabucal possibilitou a melhora do padrão muscular das jovens com maloclusão Classe II, 1ª divisão dentária.
Abstract: The surface electromyography is an excellent way to evaluate the muscle function. However, it presents limitations, because the great variability in the amplitude of the electromyographic signal obtained. To reduce this variability, has been proposed the normalization of the electromyographic signal. The process consist of dividing the raw electromyographic recorder signal by a reference value expressed as a percentage, derived from measure of the electromyographic signal itself. The purpose of this study was to evaluate electromyographically the action potential of the superficial masseter muscle, the anterior temporal muscle, the orbicularis oris muscle, upper and lower segment, bilaterally, in 25 young females, aged ranging from 8 to 10 years old, with Class II division 1 malocclusion after the treatment with extraoral appliances and to compare them with 25 young females with normal occlusion, with similar aged. And to evaluate if the experiment final results can be influenced by the normalization of electromyographic data. The electromyographic signals of the masseter and temporal muscles were adquired by active single differential surface electrodes, and of the orbicularis oris muscle by passive surface electrodes of the Ag/AgCl. Muscle activity was recorded in resting position, in isometric contraction and in isotonic contraction, before and after orthodontic treatment in the malocclusion group and similar periods in the normal occlusion group. Through of specific software was determined the Root Mean Square (RMS) values of each movement. The initial data collected were submitted to the normalization procedure and were compared with the initial raw data, through of statistical analyses of variance. The results showed that the normalization procedure was able to affect the electromyographic data, suppressing the difference between the groups. This support the idea that the raw data were able to produce better conclusions than normalized data. Thus, the orthodontic treatment of the malocclusion group was evaluated using the raw data, through of statistical analyses of variance and Tukey test (a=0,05). The results showed that there was decrease of the electromyographic activity in all the muscles, in both groups difference between the groups, but that difference was not statistically significant for the right temporal muscle and the orbicularis oris muscle upper segment The muscle activity was higher in the malocclusion group than normal occlusion group in the initial phase, but that difference was not statistically significant for the masseter muscle. In the final phase there was not significant difference between the groups. It was concluding that the treatment with extraoral appliances was able to improve the muscular pattern of the young females with Class II division 1 malocclusion.
Doutorado
Ortodontia
Doutor em Radiologia Odontológica
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Wong, Pamela. "A comprehensive survey of retention procedures /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17941.pdf.
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Miller, Kevin Blaine. "A comparison of treatment impacts between invisalign and fixed appliance therapy during the first seven days of treatment." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010291.
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Thesis (Ph.D.)--University of Florida, 2005.Typescript. Title from title page of source document. Document formatted into pages; contains 36 pages. Includes Vita. Includes bibliographical references.
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Armstrong, David. "The development of an adjustable orthodontic bracket." Thesis, The University of Sydney, 2007. http://hdl.handle.net/2123/4755.
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Phelan, Angie. "MAGNETIC FORCES IN ORTHODONTICS." Thesis, Faculty of Dentistry, 2011. http://hdl.handle.net/2123/7206.
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Durrett, Sharon Jeane. "Efficacy of composite tooth attachments in conjunction with the invisalign tm system using three-dimensional digital technology." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0004566.
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Thesis (M.S.)--University of Florida, 2004.Typescript. Title from title page of source document. Document formatted into pages; contains 35 pages. Includes Vita. Includes bibliographical references.
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Coetzee, Cobus Emelius. "Development of an index for preventive and interceptive orthodontic needs (IPION)." Diss., Pretoria : [s.n.], 1999. http://upetd.up.ac.za/thesis/available/etd-01052007-125001/.
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Peerlings, Robertus Henricus Josephus. "Orthodontie en dento-faciale esthetiek het effect van orthodontische behandeling op het uiterlijk /." [S.l. : s.n.], 1992. http://catalog.hathitrust.org/api/volumes/oclc/26944835.html.
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Junior, Jose Hermenergildo dos Santos. "Avaliação do esmalte dentário antes e após a colagem e descolagem de braquetes ortodônticos." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/23/23151/tde-08042009-114516/.
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O objetivo deste trabalho foi avaliar a quantidade de resina residual após a descolagem de braquetes e a perda e/ou desgaste de esmalte ocorrido durante as fases de: colagem, descolagem e remoção dos remanescentes resinosos, na área do braquete e adjacente. A amostra foi constituída de 150 pré-molares, dividida em dois grupos de acordo com o tipo de material do braquete utilizado: metálico (n=75) e cerâmico (n=75), nas duas primeiras fases do estudo, colagem e descolagem. Os procedimentos de colagem foram realizados de acordo com a International Organization for Standardization (2003), e a descolagem segundo a orientação preconizada pelo fabricante. Na fase de remoção dos remanescentes resinosos foram considerados cinco grupos de acordo com o protocolo de acabamento/polimento e prescrição dos respectivos fabricantes: FF diamantada + Soflex; Pedra Shofu; Dentaurum Carbide; Komet Carbide e Jet Carbide, com auxilio de lupas telescópicas sob a magnificação 3x. A avaliação qualitativa (ARIm e ESI) foi realizada por meio de fotografias digitais (lupa estereoscópica - Olympus SZ61). A avalição quantitativa foi realizada pelo método de medição por Coordenada - Coordinate Measuring Machines (Mitutoyo), mod. Legex CNC 9106 - Perfil de linha. As possíveis diferenças entre os protocolos de acabamento/polimento foram avaliadas pela análise de variância (ANOVA) e pelo teste de comparações múltiplas de Tukey. As quantidades médias de resina residual encontrada na área sob a base do braquete, após acabamento/polimento foram: Diamantada FF + Soflex (10,4 m ±10,5), Pedra Shofu (18,5 m ± 12,1), Dentaurum Carbide (11,2 m ± 11,9), Komet Carbide (9,5 m ± 10,8) e Jet Carbide (22,8 m ± 24,0). E na área adjacente: Diamantada FF + Soflex (14,9 m ± 13,0), Pedra Shofu (22,8 m ±19,5), Dentaurum Carbide (21,4 m ±18,5), Komet Carbide (9,6 m ± 7,7), Jet Carbide (27,8 m ± 24,5). Desta forma, constatou-se que, em geral, os protocolos de acabamento/polimento deixaram maior quantidade de resina residual sobre a área adjacente que na área do braquete, com exceção do protocolo Komet Carbide, que teve desempenho semelhante em ambas as áreas. E as quantidades médias de perda e/ou desgaste do esmalte na área do braquete foram: Diamantada FF + Soflex (-134,9 m ± 56,4), Pedra Shofu ( 39,2 m ± 12,8), Dentaurum Carbide ( 70,5 m ± 27,9), Komet Carbide (-44,8 m ± 14,3) e Jet Carbide ( 68,2 m ± 35,7) na área do braquete, enquanto na área adjacente: Diamantada FF + Soflex (-124,7 m ± 133,1), Pedra Shofu (- 37,9 m ± 25,1), Dentaurum Carbide (- 60,1 m ±32,4), Komet Carbide (-36,6 m ± 19,5) e (Jet Carbide 65,4 m ± 65,0) (Tabela 5.9). Ressalta-se que em ambas as áreas de avaliação, o protocolo (Diamantada FF + Soflex) foi responsável pela maior quantidade de perda e/ou desgaste, diferenciando-se com significância estatística dos demais protocolos. Com base nestes resultados podemos concluir que os protocolos de acabamento/polimento avaliados demonstraram excelente desempenho na remoção dos remanescentes resinosos embora nenhum deles tenha sido capaz de remover totalmente o material de colagem, todos danificaram o esmalte, sendo o protocolo Komet carbide o mais diferenciado.The objective of this study was to evaluate the quantity of residual resin after removal of brackets and the loss and//or wear-and-tear of enamel occurring during the phases of fixing, detaching and removal of remnant resin in the bracket area and its adjacent. The sample was made up of 150 premolars, divided into two groups in accordance with the type of bracket material used: metal (n=75) and ceramic (n=75), in the two initial phases of study, fixing and removal. Fixing procedures were carried out in accordance with the International Organization for Standardization, (2003), and removal according to orientation advocated by the manufacturer. In the removal of remnant resin phase five groups were considered, all in agreement with the finishing/polishing protocol and prescription of the respective manufacturers: FF diamantada + Soflex; Pedra Shofu; Dentaurum Carbide; Komet Carbide and Jet Carbide, and with the aid of telescopic magnifying glass of three-fold magnification Qualitative evaluation (ARIm and ESI) was done by means of digital photographs(stereoscopic magnifying glass Olympus SZ61). Quantitative evaluation was conducted using the coordinate medication method - Coordinate Measuring Machines (Mitutoyo), mod. Legex CNC 9106 - line profile. Possible differences between finishing/polishing protocols were evaluated via variance analysis (ANOVA), and by Tukey Multiple Comparison test. Median quantities of residual resin found in the region below the base of the bracket, following finishing/polishing were: Diamantada FF + Soflex (10,4 m ±10,5), Pedra Shofu (18,5m ± 12,1), Dentaurum Carbide (11,2 m ± 11,9), Komet Carbide (9,5 m ± 10,8) and Jet Carbide (22,8 m ± 24,0). In this way, it was confirmed that finishing/polishing protocols, in general, left the major part of residual resin below the adjacent area than in the bracket area, with the exception of Komet Carbide protocol, displaying similar performance in both areas Median quantities of loss and/or wearand- tear of enamel in the bracket area were: Diamantada FF + Soflex (-134,9 m ± 56,4), Pedra Shofu ( 39,2 m ± 12,8), Dentaurum Carbide ( 70,5 m ± 27,9), Komet Carbide (-44,8 m ± 14,3) and Jet Carbide ( 68,2 m ± 35,7) in bracket area, while in adjacent area: Diamantada FF + Soflex (-124,7 m ± 133,1), Pedra Shofu (- 37,9 m ± 25,1), Dentaurum Carbide (- 60,1 m ±32,4), Komet Carbide (-36,6 m ± 19,5) and (Jet Carbide 65,4 m ± 65,0) (Table 5.9) Standing out in both areas of evaluation, protocol (Diamantada FF + Soflex) was responsible for the major quantity of loss and /or wear and tear, differentiating itself from the other protocols by significant statistics. Based on these results, we can conclude that the finishing/polishing protocols evaluated, displayed excellent performance in the removal of remnant resin, although none have totally been capable of removing fixing material, and all damaged the enamel, with Komet protocol being the most differentiated.
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Ribeiro, Alexandre Antonio [UNESP]. "Avaliação mecânica tridimensional de molas T compostas de NiTi e Aço." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/145504.
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000874741.pdf: 2115276 bytes, checksum: 22aa654fa4b88145cca778bd61f794f9 (MD5)O fechamento de espaços por meio de molas T com a liga de Níquel-Titânio (NiTi) para a retração em massa ainda não foi estudada. A superelasticidade e memória de forma são propriedades desta liga interessantes para a movimentação dentária. Sendo assim, o objetivo foi determinar, por meio da avaliação tridimensional as melhores variações do design de molas T compostas para o fechamento de espaços em massa. Foram utilizadas cem molas compostas por alças T de NiTi e fios base de aço inoxidável, unidos por tubos cruzados. As molas foram divididas em grupos de 10 molas de acordo com o calibre do fio de NiTi, altura da mola, ativação horizontal ou ainda variações no raio de pré-ativação ou espessura do fio base. As molas foram testadas na máquina de ensaios OFT (Orthodontic Force Tester). Foram medidos força, momento e relação momento força (M:F) nos eixos de interesse. A análise multivariada de perfis foi aplicada para comparação dos grupos. Observou-se que as molas com médias de força horizontal adequadas para retração tem espessuras de 0,017 x 0,025 e 0,018 x 0,025 de NiTi. As variáveis altura da mola e ativação horizontal demonstraram interação durante a desativação para a variável força, entretanto, não demonstraram esta relação para momento e M:F. Observou-se que o melhor design das molas foi a altura de 7mm, ativação horizontal de 7mm e raio de pré-ativação de 6mm. Concluiu se que as molas compostas de NiTi compostas apresentaram propriedades adequadas para retração em massa, especialmente com pré-ativação 6mm de raio de curvatura.
The space closure with Nickel-Titanium alloy (NiTi) T-loop springs for en masse retraction has not been studied. Superelasticity and shape memory are NiTi properties interesting to tooth movement. The aim was to determine by assessing three dimensionally the best T-loop spring design to the en masse space. Were tested one hundred T-loop composed springs by handles of rectangular NiTi wires and stainless steel horizontal rods, joined by criss-cross tubes. The T-loop composed springs were divided in groups of ten springs according to the caliber of the NiTi wire, handles height, horizontal activation or variations of preactivation radius or thickness of the wire rods. The springs were tested in the OFT device (Orthodontic Force Tester) for measuring orthodontic force system. Mmultivariate analysis profiles was used to compare the groups along the deactivation and possible interaction between the variables under study. It was observed that composed T-loop springs showed adequate horizontal force average for en mass retraction 0.017 x 0.025 and 0.018 x 0.025 NiTi wires. The height handles and horizontal activation variables demonstrated interaction during off to the force variable, however, have not shown this relationship to moment and M:F. It was considered that the best design of T-loop was 7mm height, 7mm horizontal activation and pre-activation radius 6mm. It was concluded that composite NiTi T-loop springs showed adequate properties for en masse retraction...(Complete abstract electronic access below)
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Ribeiro, Alexandre Antonio. "Avaliação mecânica tridimensional de molas T compostas de NiTi e Aço /." Araraquara, 2015. http://hdl.handle.net/11449/145504.
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Orientador: Lidia Parsekian MartinsCo-orientador: Renato Parsekian Martins
Banca: Laurindo Zanco Furquim
Banca: José Nelson Mucha
Banca: Luis Geraldo Vaz
Banca: Ary dos Santos Pinto
Resumo: O fechamento de espaços por meio de molas T com a liga de Níquel-Titânio (NiTi) para a retração em massa ainda não foi estudada. A superelasticidade e memória de forma são propriedades desta liga interessantes para a movimentação dentária. Sendo assim, o objetivo foi determinar, por meio da avaliação tridimensional as melhores variações do design de molas T compostas para o fechamento de espaços em massa. Foram utilizadas cem molas compostas por alças T de NiTi e fios base de aço inoxidável, unidos por tubos cruzados. As molas foram divididas em grupos de 10 molas de acordo com o calibre do fio de NiTi, altura da mola, ativação horizontal ou ainda variações no raio de pré-ativação ou espessura do fio base. As molas foram testadas na máquina de ensaios OFT (Orthodontic Force Tester). Foram medidos força, momento e relação momento força (M:F) nos eixos de interesse. A análise multivariada de perfis foi aplicada para comparação dos grupos. Observou-se que as molas com médias de força horizontal adequadas para retração tem espessuras de 0,017" x 0,025" e 0,018" x 0,025" de NiTi. As variáveis altura da mola e ativação horizontal demonstraram interação durante a desativação para a variável força, entretanto, não demonstraram esta relação para momento e M:F. Observou-se que o melhor design das molas foi a altura de 7mm, ativação horizontal de 7mm e raio de pré-ativação de 6mm. Concluiu se que as molas compostas de NiTi compostas apresentaram propriedades adequadas para retração em massa, especialmente com pré-ativação 6mm de raio de curvatura.
Abstract: The space closure with Nickel-Titanium alloy (NiTi) T-loop springs for en masse retraction has not been studied. Superelasticity and shape memory are NiTi properties interesting to tooth movement. The aim was to determine by assessing three dimensionally the best T-loop spring design to the en masse space. Were tested one hundred T-loop composed springs by handles of rectangular NiTi wires and stainless steel horizontal rods, joined by criss-cross tubes. The T-loop composed springs were divided in groups of ten springs according to the caliber of the NiTi wire, handles height, horizontal activation or variations of preactivation radius or thickness of the wire rods. The springs were tested in the OFT device (Orthodontic Force Tester) for measuring orthodontic force system. Mmultivariate analysis profiles was used to compare the groups along the deactivation and possible interaction between the variables under study. It was observed that composed T-loop springs showed adequate horizontal force average for en mass retraction 0.017 "x 0.025" and 0.018 "x 0.025" NiTi wires. The height handles and horizontal activation variables demonstrated interaction during off to the force variable, however, have not shown this relationship to moment and M:F. It was considered that the best design of T-loop was 7mm height, 7mm horizontal activation and pre-activation radius 6mm. It was concluded that composite NiTi T-loop springs showed adequate properties for en masse retraction...(Complete abstract electronic access below)
Doutor
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Soegiharto, Benny Mulyono. "Skeletal maturation assessment in orthodontics." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1445101/.
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Aims: (1) To assess skeletal maturation in orthodontics using hand-wrist and cervical vertebrae methods and (2) To characterise the morphological differences of the craniofacial and cervical vertebrae morphologies at different growth stages in two different populations.;Subjects and Methods for the main study: The study included 2,167 subjects with hand-wrist and lateral cephalometric radiographs. Of these, there were 648 Indonesian males, 303 Caucasian males (age range 10-17 years), 774 Indonesian females and 442 Caucasian females (age range 8-15 years). Each hand-wrist radiograph was observed and classified according to the Skeletal Maturation Index (SMI) (Fishman, 1982). Similarly, cervical vertebrae maturation was assessed using lateral cephalometric radiographs. The outlines of the cervical vertebrae were traced and classified according to the Cervical Vertebrae Maturation (CVM) Index (Baccetti et al., 2002). Craniofacial and cervical vertebrae morphologies were evaluated from the lateral cephalograms. Each radiograph was initially traced and then digitised using a customised computer program.;Results: 1. Repeatability study (Chapter 2) Kappa values showed substantial to good intra-operator repeatability for the Skeletal Maturation Index (SMI) and Cervical Vertebrae Maturation (CVM Index) for both ethnic groups and these two methods were used in the main study. For the cephalometric data, the Bland and Altaian method and the Lin's Concordance Correlations showed acceptable agreement and the methods were considered appropriate for use in the main study. 2. Main study: Chapter 3: Skeletal maturation stages were described using the SMI and CVM Index. On average, the Caucasian children attained each maturational stage at an earlier age than their Indonesian peers although the differences were less obvious in females than in males. Multiple regression analysis showed that, on average at any given age, the Caucasian males were 1 SMI stage ahead of the Indonesians, whilst the Caucasian females were around 0.5 SMI stage ahead of their Indonesian peers. Chapter 4: Ages of attainment of peak pubertal growth for the selected craniofacial parameters were determined. Growth curves and growth velocity curves were constructed for each of these parameters. The results for the craniofacial parameters showed that the Caucasian males attained peak pubertal growth slightly earlier than their Indonesian peers for the majority of parameters. However, in contrast to the SMI and CVM Index results, the Indonesian female, on average, reached peak pubertal growth earlier than the Caucasians for the majority of parameters. In both Indonesians and Caucasians, on average, the females reached peak pubertal growth of the craniofacial parameters earlier than the males. Chapter 5: Receiver Operating Characteristic (ROC) analysis was performed to assess, and compare, the ability of the SMI and CVM Index to discriminate between subjects who had yet to attain peak pubertal growth and those who had reached, or passed it. This analysis was based on the velocity growth curves produced for Chapter 4. Areas Under the ROC Curve analysis (AUC) for the SMI (AUC > 0.9) were greater than those for the CVM Index (AUC > 0.8) and the differences between the two methods were statistically significant (P<0.05 for all parameters investigated). Nevertheless, the curves for both SMI and CVM approached the top left comer of the ROC graphs, indicating that both tests have good discriminatory ability. The differences between the two methods ranged between only 1 and 7%. Chapter 6: Differences in the craniofacial and cervical vertebrae structures at different growth stages in both ethnic and gender groups were investigated.;Conclusions: Differences in the age of attainment of each skeletal maturation stage, as well as the age of attainment of the peak pubertal growth of selected craniofacial parameters, exist between the two ethnic and gender groups. These differences need to be taken into account in orthodontic diagnosis and treatment planning. This study also confirmed the validity of both the SMI and CVM Index to discriminate individuals into those who have yet to attain peak pubertal growth and those who have reached/passed peak pubertal growth. However, as the differences in the discriminatory ability were low, this study questions the benefit of taking additional hand-wrist radiographs when the use of lateral cephalograms can be optimised. There were differences in craniofacial and cervical vertebrae morphologies between the two ethnic and gender groups, although they were usually not statistically significant. A small number of parameters showed statistically significant differences, however, these differences were small and unlikely to be clinically relevant. Therefore this study suggests that orthodontic modalities commonly used in Caucasians, may also be applied in Indonesian subjects and that the use of the CVM Index is justified in Indonesians.
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Conocimiento, Dirección de Gestión del. "Journal of Clinical Orthodontics: JCO." JCO, Inc, 2004. http://hdl.handle.net/10757/655333.
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Conocimiento, Dirección de Gestión del. "The European Journal of Orthodontics." Oxford Academic, 2004. http://hdl.handle.net/10757/655389.
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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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Reddick, Chad R. "A comparative study of nonextraction treatment efficiency using conventional edgewise brackets and self-ligating brackets." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2009r/reddick.pdf.
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Harris, Angela Manbre Poulter. "Assessment of tooth movement in the maxilla during orthodontic treatment using digital recording of orthodontic study model surface contours." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_2231_1254312268.
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The aim of this project was to measure changes in dimension of the first three primary rugae and to evaluate tooth movement in the maxilla during orthodontic treatment in patients treated with and without premolar extractions.
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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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Blackburn, James. "IN-VITRO ASSESSMENT OF A NOVEL BRACKET'S EFFECT ON RESISTANCE TO SLIDING." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3722.
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Friction, binding and notching are the factors that contribute to resistance to sliding during orthodontic tooth movement. However, most attempts at reducing resistance aim only to reduce the archwire/ligature friction. In this study, a novel bracket with a unique design aimed to reduce all three components of resistance to sliding. Four types of brackets (passive and active self-ligating, traditionally ligated and the novel bracket, (n=5, each) were tested at 0, 2, 4, 6, and 8ᵒ of tip on a 0.019 x 0.025”archwire. The resistance to sliding values were recorded. At 0ᵒ, the passive self-ligating and novel bracket showed reduced resistance when compared to the traditionally ligated bracket (P< 0.05). At the other angles of tip, no differences were observed among the brackets. These data suggest that the novel bracket could potentially decrease the resistance to sliding during orthodontic treatment and further studies are indicated to test the improved bracket design.
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Gordon, Janet. "An analysis of the acceptance of results of orthognathic surgery using a personality profile assessment." Title page, contents and summary only, 1999. http://web4.library.adelaide.edu.au/theses/09DM/09dmg6635.pdf.
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"February 1999" Bibliography: leaves 119-138. The results of the study concluded that the identification of the patient's personality profile was unable to predict those patients who would not have a successful perception of the outcome of surgery, mirroring the findings of Pogrel and Scott (1994) who found that it was impossible to identify the 'psychologically bad-risk' orthognathic patient.
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Roos, Bryan K. "A comparison of soft tissue prediction tracings using the Andrews and Ricketts diagnostic techniques." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2819.
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Thesis (M.S.)--West Virginia University, 2003.Title from document title page. Document formatted into pages; contains ix, 77 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 58-61).
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Makinson, Mary. "Preventive and interceptive orthodontics : in relationship to the School Dental Service and the State Orthodontic Service in N.S.W." Thesis, The University of Sydney, 1990. http://hdl.handle.net/2123/4660.
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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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Cox, Stan C. "A comparative study of extraction treatment efficiency using conventional edgewise brackets and self-ligating brackets." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/cox.pdf.
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Mota, Júnior Sergio Luiz. "Desenvolvimento de um dispositivo posicionador de acessórios ortodônticos com precisão vertical." Universidade Federal de Juiz de Fora, 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/2227.
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FAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
O correto posicionamento dos bráquetes é importante para garantir o alinhamento e nivelamento dos dentes durante o tratamento ortodôntico. Há instrumentos posicionadores que são utilizados para determinar a posição vertical adequada dos acessórios na superfície dentária. Mesmo estes instrumentos são passíveis de erros durante sua utilização, por permitirem a inclinação vestíbulo-lingual, levando os bráquetes a uma posição inadequada. Prejudicam todo o tratamento, e causam problemas dentários individuais como: alteração do comprimento do arco dentário; provocam intrusões, extrusões, contatos pré-maturos e; consequentemente comprometem todo o sistema mastigatório. Baseado nesta limitação dos instrumentos posicionadores verticais atualmente disponíveis no mercado, o objetivo deste estudo foi descrever o desenvolvimento, apresentar e testar um posicionador do tipo estrela que impeça a inclinação vestíbulo-lingual durante o seu uso. O instrumento foi criado, modelado, patenteado e prototipado para os testes laboratoriais. Para os testes, foram formados quatro grupos com diferentes tempos de experiência clínica em Ortodontia, composto por seis participantes em cada grupo. Cada indivíduo colou bráquetes edgewise 0,022”x0,028” em um manequim typodont com maloclusão Classe I em incisivos, caninos e pré-molares superiores e inferiores. Eles utilizaram primeiramente a estrela de Boone e posteriormente a Estrela UFJF (houve pelo menos 30 dias de diferença entre as colagens). Os estudos mostraram que o uso da Estrela UFJF propiciou médias de colagem mais próximas à considerada ideal no presente estudo (4mm) nos grupos que apresentavam alguma experiência em Ortodontia. Nos grupos de dentes avaliados, o desvio padrão em relação 4mm foi menor quando utilizada a Estrela UFJF se comparado ao uso da estrela de Boone. Todos experimentos apresentaram menores variâncias quando utilizada a Estrela UFJF. Conclui-se, desta forma, que o instrumento desenvolvido apresentou menores variações no posicionamento vertical dos bráquetes ortodônticos quando associado à experiência clínica, sendo esta necessária para seu uso.
The bracket placement is important for the appropriate teeth alignment and leveling during orthodontic treatment. Instruments can be used to determine the position of vertical attachments at dental surface. They are prone to fail during their use because they allow buccolingual inclination and take wrong position of attachments. It may jeopardize a treatment, causing to individuals severe dental problems, such as change the length of the dental arch, intrusions, extrusions, premature contacts and even commit all estomatognatic system. Based on the vertical limitation of some instruments positioners, the aim of this study was to develop and test a star-like positioner that prevents a buccolingual inclination during its use. The instrument was created, modeled, patented and prototyped for laboratory tests. For analysis, 4 groups were defined with different clinical experience in orthodontics, with 6 participants in each group. Each individual bonded edgewise 0.022x0,028in brackets in a typodont with Class I malocclusion in maxillary and mandibular incisors, canines and premolars, first with a Boone gauge and at least 30-days after, with Estrela UFJF. Studies showed that Estrela UFJF had averages closer to the ideal (4mm) in groups with some experience in orthodontics than Boone gauge. In all groups available, the standard deviation was lower with the Estrela UFJF than with Boone gauge. Specific groups of teeth, which variances were lower with Estrela UFJF than with Boone gauge. It is concluded that the developed instrument presented less variations in bracket vertical positioning and some clinical orthodontic experience is necessary to its use.
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Minor, Valerie Jean Vonnoh. "Effects of preoperative ibuprofen, anxiety, and gender on post-separator placement pain." [Gainesville, Fla.] : University of Florida, 2004. http://etd.fcla.edu/UF/UFE0014296/minor_v.pdf.
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Thesis (M.S.)--University of Florida, 2006.Typescript. Title from title page of source document. Document formatted into pages; contains 34 pages. Includes Vita. Includes bibliographical references.
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Marris, Curtice Kary. "Effects of preoperative ibuprofen, anxiety and gender on post separator placement pain." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0004879.
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Thesis (M.S.)--University of Florida, 2004.Typescript. Title from title page of source document. Document formatted into pages; contains 31 pages. Includes Vita. Includes bibliographical references.
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Hedrén, Pontus, and Agnes Ecorcheville. "Orthodontic treatments in general practice in cooperation with orthodontists -A survey of the recommended appliances among orthodontists in Sweden." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19638.
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SammanfattningSyfte: Studiens mål var att uppnå kunskap angående olika interceptiva ortodontiska behandlingar, undersöka vilka ortodontiska behandlingar som är vanligast förekommande hos allmäntandläkare och rekommenderade av svenska ortodontister samt att undersöka om de vanligaste behandlingarna är de som lärs ut vid odontologiska fakulteten i Malmö. Potentiella skillnader mellan grupperna undersöktes också. Material och metod: En PubMed-sökning gjordes för att undersöka litteratur för de apparaturer som används mest frekvent. Ett frågeformulär utformades och skickades till 169 ortodontister med konsultationsverksamhet för att undersöka användningen av olika apparaturer som sker i samarbete med allmäntandläkare. Resultat: Totalt inkluderades 153 artiklar i litteraturstudien och frekventa behandlingar presenterades. Den mest använda apparaturen för behandling av:- Korsbett var Quad Helix- Frontal invertering var klammerplåt med Z-fjäder - Klass II malocklussion var van Beek aktivator.En signifikant skillnad mellan grupperna hittades; kvinnliga ortodontister rekommenderade allmäntandläkare aktivator med extra oralt drag vid behandling av Klass II malocklussion i större utsträckning än manliga ortodontister. Slutsats: Valet av apparatur överensstämde till största delen med vad som anses vara det mest effektiva enligt de artiklar som inkluderats i studien. Det var även dessa apparaturer som används i studentundervisningen vid odontologiska fakulteten i Malmö.Skillnaderna i valet av apparatur mellan de manliga och de kvinnliga ortodontisterna beror troligtvis på den ojämna könsfördelningen av nyutexaminerade ortodontister de senaste 50 åren.AbstractObjective: The aim of the present study was to obtain knowledge about different interceptive orthodontic treatments, investigate which orthodontic treatments are most frequently used by general practitioners and recommended by Swedish orthodontists and to see if the most common treatments corresponded to the educational dental program in orthodontics at Malmö University. Potential differences among groups were also investigated. Materials and methods: A PubMed search was made to investigate the literature of the most frequently used appliances in orthodontic treatment concerning the diagnoses and the appliances used in general practices. A questionnaire was sent to 169 consulting orthodontists to investigate the use of different appliances in cooperation with general practitioners.Results: A total of 153 articles were included in the literature study and frequently used treatments were presented.The most common appliance for correction of: - Posterior crossbite was the Quad Helix.- Anterior crossbite was a plate with Z-springs.- Class II malocclusion was the headgear activator, according to van Beek.A significant difference between genders was found, i.e. that female orthodontists recommended headgear activator more often than males for Class II in general practise. Conclusions: The choice of appliances mostly corresponded to what is most effective according to the literature included in the study and these are used in the educational program for dental students in Malmö.The differences between the genders of the orthodontists in choice of treatment are most likely due to the gender distribution of becoming orthodontists during the last five decades.
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Olson, Jeffrey C. "Comparison of Patient Factors Influencing the Selection of an Orthodontist, General Dentist, or Direct-To-Consumer Aligners for Orthodontic Treatment." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5766.
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Purpose: To evaluate the factors that influence potential orthodontic patients choosing between an orthodontist, general dentist, and direct-to-consumer (DTC) aligners for their treatment, and to determine the demand for each provider type.
Methods: An electronic survey was administered to 250 individuals among the general population of adults in the United States. Questions were designed to determine the respondent’s level of interest in pursuing orthodontic treatment with each provider type, evaluate their current level of knowledge concerning provider options, and identify factors influencing their selection. Pearson’s chi-squared test and ANOVA were used to evaluate the factors influencing patients in their selection.
Results: When asked their preference in provider type, 43.8% of respondents selected orthodontist, 34.1% selected DTC aligners, and 22.1% selected general dentist. Among respondents with the highest level of interest in pursuing orthodontic treatment, 50% selected an orthodontist and 27% selected DTC aligners. For respondents with moderate levels of interest in pursuing treatment, only 21% selected an orthodontist and 48% selected DTC aligners. The biggest perceived advantage of treatment with an orthodontist was quality of treatment, and the biggest disadvantage was cost. For DTC aligners, the biggest perceived advantage was convenience, followed by cost, and the biggest disadvantage was quality of treatment. Among adults with children, 34% selected DTC aligners for themselves and only 16% selected DTC aligners when selecting for their children.
Conclusion: Adults in the United States have similar levels of interest in pursuing orthodontic treatment with orthodontists and DTC aligners and, to a lesser degree, general dentists. A significant portion of those who select DTC aligners for their treatment are patients who would not have otherwise undergone treatment with an orthodontist. Patients tend to select orthodontists due to quality of treatment, whereas DTC aligners are selected due to convenience, followed by cost. Even among parents who prefer DTC aligners for their own treatment, parents tend to select an orthodontist for their child’s treatment.
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Maumela, Patricia Mutsinda. "Application of the dental aesthetic index in the prioritization of orthodontic service needs." Thesis, University of Limpopo (Medunsa Campus), 2010. http://hdl.handle.net/10386/444.
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Thesis (M.Med. (Orthodontics))--University of Limpopo, 2010Introduction: Orthodontic services in South Africa are mainly offered by the private sector and to a lesser extent by the four government funded training institutions which are plagued by limited resources. The majority of patients cannot afford private fees and seek treatment at these training institutions. The growing number of patients on waiting lists is a problem. Prioritization of orthodontic services would assist to ensure that these services are preferentially provided to those patients most likely to derive the greatest benefit. The Dental Aesthetic Index (DAI) is used to estimate orthodontic treatment need and can also be used as a screening tool to determine treatment priority (Cons, Jenny & Kohout, 1986). The DAI focuses on aesthetics and therefore omits other malocclusion traits thereby limiting its comprehensiveness as an assessment tool. To date no published study has been found that identified other malocclusion traits not included in the DAI and examined the influence that these malocclusion traits have in the prioritization of orthodontic service needs whilst using the DAI. Thus the aim of this research was to assess the application of the DAI to prioritize orthodontic services needs within a government funded institution. The objectives were: 1) To identify other malocclusion traits not included in the DAI. 2) To evaluate how much influence other malocclusion traits not included in DAI have in the prioritization of orthodontic service needs. 3) To compare the mean DAI scores according to age and gender. Materials and methods: One hundred and twenty (120) pre-treatment study models of patients in the permanent dentition stage were collected from the records archive of the Department of Orthodontics, University of Limpopo (Medunsa campus) using a systematic sampling method. The study models were assessed using the DAI by two calibrated examiners. Other malocclusion traits were identified and recorded according to the basic method for recording occlusal traits (Bezroukov et al., 1979). Specific codes were assigned to each identified malocclusion trait from code 01 to 09. The traits were recorded once, by marking the respective code/malocclusion trait with an x when present on each study model. Descriptive statistics, Pearson correlation coefficient, Chi-square values and t-tests were employed to analyze the data and p values of less than or equal to 0.05 (p < 0.05) were considered statistical significant. Results: The sample consisted of 58 females and 62 males, aged 10-45 years with a mean age of 17.9 years and a SD of 6.2 years. The DAI scores showed that 19.1% had normal or minor malocclusion, 17.5% had definitive malocclusion, 21.7% had severe malocclusion and 41.7% had handicapping malocclusion. The mean DAI score was 35.2 with a SD of 10.3. A statistical significant difference was found between mean DAI score of adults and adolescence (p < 0.05), while no statistical significant difference was found between males and females (p > 0.05). The study identified the following other malocclusion traits: crowded and rotated posterior teeth (27.5%), posterior crossbite (22.8%), retained primary teeth (13.4%), missing molars (10.7%), partially erupted teeth (9.4%), deep overbite (8.1%), transposition (3.4%), peg lateral (3.4%) and supernumerary teeth (1.3%). These malocclusion traits accounted for 21.1% of the total malocclusion traits of the sample whilst the DAI accounted for 78.9%. About 47.6% of these other malocclusion traits were found in handicapping category of the DAI, 19.5% in the severe category, 18.1% in the definitive category and 14.8% in the normal or minor category. The distribution of subjects over the four DAI categories and the distribution of subjects with other malocclusion traits over the same DAI categories did not differ significantly (Chi-square test, p = 0.917). The intra and inter examiner reliability was tested using the Pearson correlation coefficient and found to be highly correlated (r = 0.9). Conclusions: The study showed that the DAI is a valid and reliable index that can be applied to prioritize orthodontic service needs in a financially constrained situations without any modification as two thirds of other malocclusion traits were found in categories which the DAI had already prioritized for treatment.
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Ferreira, Marcelo do Amaral. "Efeito da distância interbraquetes sobre o sistema de forças em alças de retração ortodôntica com geometria delta: estudo numérico experimental." Universidade Tecnológica Federal do Paraná, 2010. http://repositorio.utfpr.edu.br/jspui/handle/1/1055.
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CAPESO presente trabalho estudou por meio do Método dos Elementos Finitos e por testes experimentais o efeito da distância interbraquetes, ativação e geometria (variáveis independentes) sobre o sistema de forças (Fx, Fy e Mz) produzidos por alças delta após ativação. As amostras foram produzidas com titânio-molibdênio, com secção transversal 0.017 x 0.025 polegadas (0,43mm x 0,64mm) e separadas em dois grupos (G1 e G2), com dez alças cada um. O grupo de alças G1 apresenta hastes com inclinação em suas extremidades. O Grupo G2 hastes com extremidades arredondadas. Visando identificar diferenças entre as médias populacionais devidas a três possíveis causas ou fontes de variação (variáveis independentes) e as interações entre as mesmas (geometria, distância interbraquetes e ativação), utilizou-se a método de análise de variância a três critérios de classificação, modelo fatorial completo (ANOVA). O método de análise de variância aceita ou rejeita a(s) hipótese(s) H0 de igualdade das médias populacionais. Se H0 for rejeitada, admite-se que pelo menos uma das médias é diferente das demais. Nestas condições utilizou-se o teste proposto por Games-Howell para variâncias heterogêneas, visando estabelecer comparações entre os diferentes tratamentos. Para estimar a constante elástica para os dois tratamentos (G1 e G2), utilizou-se a análise de regressão para verificar o grau de relacionamento entre os valores da variável resposta (força Fx) e a variável independente (ativação da alça). Os Grupos G1 e G2 apresentaram magnitudes de força compatíveis com as descritas pela literatura (houve variação de 81,65gf até125gf para o grupo G1 e de 92,45gf até 133,10gf para G2, aos 3.0mm e 4.0mm de ativação, respectivamente para Fx). As forças verticais Fy foram de 50gf e 16gf para G1 e G2, aos 4.0mm, respectivamente, e 52,15gf e 26,95gf para G1 e G2 aos 3.0mm de ativação, respectivamente. A constante de mola encontrada para os grupos estudados mostrou estar dentro de limites apropriados para uso clínico, resultando 27,95gf/mm para G1 e 32,09 para G2. A relação M/F aumentou à medida que as alças desativavam. As alças mostraram ser adequadas para a retração de caninos desde que ativadas até aos 4,0mm e reativadas após 2,0mm de desativação. A relação M/F média foi de 9,2mm aos 4,0 mm de ativação e de 13mm aos 3,0mm para G1 enquanto que para G2 os valores médios foram de 9,3mm aos 4,0mm de ativação e13mm aos 3,0mm. Não houve diferença significativa entre os grupos. A variável independente ativação causou diferença estatística significativa nos resultados das variáveis dependentes (Fx, Fy e Mz). As diferentes distâncias interbraquetes não influenciaram de maneira significativa o sistema de forças. A variável grupo influenciou de maneira significativa os valores de Fy e Mz.
The present study tested experimentally and by Finite Element Method the effect of inter-bracket distance (IBD), activation and geometry (independent variables) on the force system (Fx, Fy, Mz) produced by delta springs after activation. The springs were produced with titanium-molybdenum 0.017 x 0.025 in (0,43mm x 0,64mm), and separated in two groups (G1 and G2) with ten springs each one. The springs in group G1 presented angulated legs and in the group G2 rounded legs. Analysis of factorial variance averages caused by three possible variation (inter brackets distance, geometry and activation) sources and the interactions between them. Regression analysis was also performed to obtain the spring rate. Groups G1 and G2 presented force magnitudes which are compatible with the ones mentioned in the literature related to the subject (varying from 81,65gf to 125gf for G1 and from 92,45gf to 133,10gf for G2, at 3.0mm and 4.0mm of activation, respectively for Fx). The vertical Fy forces were 50 gf and 16gf for G1 and G2, at 4.0mm, respectively, and 52,15gf and 16,95 gf for G1 and G2 at 3.0mm of activation, respectively. The spring constants have proved to be within the levels which are appropriate for clinical use, resulting 27,95gf/mm for G1 and 32,09 for G2 groups. The mean moment-to-force ratio (M/F) was M/F=9,2mm at 4,0 mm of activation and 13mm at 3,0mm of activation for G1 group, whereas for G2 the mean values were M/F=9,3mm at 4,0mm of activation and M/F=13mm at 3,0mm. The M/F ratio incresead as the springs deactivated. There was no statistical differences between groups. IBD and geometry does not cause significative influence on force systems resulting from activations, but activation that produced statistical difference on force system (Fx, Fy and Mz).
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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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Williams, C. Lesley. "A computer-based decision support system for orthodontic diagnosis and treatment planning." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21223.pdf.
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McCusker, Neil. "Light curing in orthodontics : should we be worried?" Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551289.
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There were four aims to this study; to assess the profile of orthodontists, their light curing processes and knowledge of the appliances they use. To calculate the maximum permissible daily exposure times for a number of different types of currently available light curing units. To evaluate the effect of orthodontic brackets to the blue light hazard. To test the hypothesis that routine use of dental curing units may lead to problems with colour discrimination in clinicians, namely orthodontists, when compared with a non- dental control. A self administered questionnaire was designed to assess the profile of orthodontists and the procedures used for light curing. This was completed by 104 orthodontists. The maximum permissible daily exposure times of a variety of curing lights (8 LED, 2 Quartz Tungsten Halogen, and 1 plasma) were calculated at distances of 2cm, 10cm, 20cm, 30cm, 40 cm, 5Ocm and 60 using a spectroradiometer. A phantom head unit with acrylic teeth was used to assess the effect of different bracket materials (metal and aesthetic) on reflected light and the maximum daily exposure limits. The Farnsworth Munsell l00 hue test was used to assess the colour discrimination and deficiency of 15 orthodontists and 15 controls. The results demonstrate that Orthodontists knowledge about the properties of light curing units that are important for orthodontic bonding and safety is low. Blue light hazard decreases as distance from the eye increases. Current light curing units a-re unlikely to reach maximal daily exposure for blue light at normal working distances . • Orthodontic bracket materials do affect reflected light but the differences are unlikely to be of clinical significance. Continued use of current dental light curing units does not lead to problems with colour discrimination.
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Ödman, Jan. "Implants in orthodontics an experimental and clinical study /." [Göteborg] : Dept. of Orthodontics, Faculty of Odontology, University of Göteborg, 1994. http://books.google.com/books?id=fn1qAAAAMAAJ.
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Thunya-Udom, Teera. "An Analytical Study Of The Undergraduate Orthodontics Curriculum." Thesis, Faculty of Dentistry, 1989. http://hdl.handle.net/2123/4274.
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Goldade, Kent Douglas. "Physical properties of the upper lip measured during simulated tooth movement." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq23317.pdf.
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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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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