Made available in DSpace on 2014-12-17T15:43:53Z (GMT). No. of bitstreams: 1 ArthurCRF_DISSERT.pdf: 1992209 bytes, checksum: 6f8fd50e3b94c7cbf749e92d1049a08b (MD5) Previous issue date: 2013-03-22 / The calculation of tooth mass discrepancy, essential for good planning and a proper orthodontic finishing, when performed manually, besides being laborious, requires considerable time consumption. The aim of this study was to develop and test Bolton Freeware, a software for analysis of the tooth mass discrepancy of Bolton, aiming to minimize the consumption of time in a less onerous way. The digital analysis of the software was done by means of two-dimensional scanning of plaster study models and compared to manual evaluation (gold standard), using 75 pairs of stone plaster study models divided into two groups according to the magnitude of the Curve of Spee (group I from 0 to 2 mm, group II greater than 2 to 3mm). All the models had permanent dentition and were in perfect condition. The manual evaluation was performed with a digital caliper and a calculator, and the time required to perform the analysis for both methods was recorded and compared. In addition, the software was evaluated by orthodontists regarding its use, by means of questionnaires developed specifically for this purpose. Calibration was performed prior to manual analysis, and excellent levels of inter-rater agreement were achieved, with ICC > 0.75 and r > 0.9 for total and anterior proportion. It was observed in the evaluation of error of the digital method that some teeth showed a significant systematic error, being the highest measured at 0.08 mm. The analysis of total tooth mass discrepancy performed by Bolton Freeware, for those cases in which the curve of Spee is mild and moderate, differ from manual analysis, on average, 0.09 mm and 0.07 mm respectively, for each tooth evaluated, with r> 0, 8 for total and anterior proportion. According to the specificity and sensitivity test, Bolton Freeware has an improved ability to detect true negatives, i.e. the presence of discrepancy. The Bolton analysis digitally performed was faster, with an average difference of time consumed to perform the analysis of Bolton between the two methods of approximately 6 minutes. Most experts interviewed (93%) approved the usability of the software / O c?lculo da discrep?ncia de massa dent?ria, efetivo recurso para um bom planejamento e uma adequada finaliza??o ortod?ntica, quando realizado manualmente, al?m de trabalhoso, exige um consider?vel consumo de tempo. O objetivo desse estudo foi o desenvolvimento e teste do Bolton Freeware, um programa de computador para an?lise de discrep?ncia de massa dent?ria de Bolton, visando minimizar o consumo de tempo de forma menos onerosa. A an?lise digital no software foi feita por meio da digitaliza??o bidimensional de modelos de estudos de gesso e comparada com a avalia??o manual (padr?o-ouro), utilizando 75 pares de modelos de estudo em gesso pedra, divididos em dois grupos conforme a magnitude da curva de Spee (0 a 2mm e de 2 a 3mm). Todos os modelos possuiam dentadura permanente e se encontravam em perfeito estado de conserva??o. A avalia??o manual foi realizada com paqu?metro digital e calculadora e o tempo requerido para realiza??o da an?lise nos dois m?todos foi cronometrado e comparado. Al?m disso o programa foi avaliado por 30 ortodontistas quanto ao seu uso, por meio de question?rios desenvolvidos especialmente para essa finalidade. Foi realizada calibra??o pr?via para an?lise manual e se obtiveram ?timos n?veis de concord?ncia interexaminador, com CCI>0,75 e r>0,9 para a discrep?ncia total e anterior. Observou-se, na avalia??o do erro do m?todo digital, que alguns dentes apresentaram um erro sistem?tico significante, sendo o maior quantificado em 0,08mm. A an?lise da discrep?ncia de massa dent?ria total realizada pelo Bolton Freeware, para aquele casos de curva de Spee leve e moderada, diferiu da an?lise manual, em m?dia, de 0,09mm e 0,07mm respectivamente, para cada dente avaliado, com r>0,8 para propor??o total e anterior. De acordo com os testes de especificidade e sensibilidade, o Bolton Freeware possui uma melhor capacidade de detectar os verdadeiros negativos, ou seja, a presen?a da discrep?ncia. A an?lise de Bolton realizada digitalmente foi mais r?pida, com a m?dia das diferen?as dos tempos consumidos para realiza??o da an?lise de Bolton entre os dois m?todos de aproximadamente 6 minutos. A maioria dos especialistas entrevistados (93%) aprovou a usabilidade do programa

Made available in DSpace on 2014-12-17T14:13:57Z (GMT). No. of bitstreams: 1 KarlaPCA.pdf: 417680 bytes, checksum: 45816114a785f665c7781391afa90d18 (MD5) Previous issue date: 2005-12-05 / The present research carried out from three national dentistry magazines published in the period between 1990 and 2004, has as a goal to analyze how bioethics has been approached in this area, not only identifying the main concerns and tendencies, but also aiming to learn how this knowledge is produced and divulged in the dentistry circuit. We have articulated a quantitative-qualitative approach, studying 2995 articles. The articles were selected and assorted in twenty thematic categories, through their titles and key words. The analysis of the empiric material shows that, although there is a growth tendency of this discussion, little has been published about this theme (1,9%). Besides, it seems that there is an arrhythmia between the present bioethic approach in dentistry and the present life demands, where the deontology and legalist focuses are predominant, seeming to correspond to the inner aspects of the profession alone. In spite of this, through the qualitative approach it was possible to identify ways to build a more complex and integral odontological formation and practice. Within the conclusions, we still point out, that, this investigation, even face to its limitations, seems to offer subsidies for reflection and further studies about the theme, working as a parameter to keep up with the evolution of the bioethic thinking in the Odontology / A presente pesquisa realizada a partir de tr?s revistas nacionais de odontologia publicadas no per?odo de 1990 a 2004, tem como objetivo analisar como a (bio)?tica vem sendo abordada nesta ?rea, n?o s? identificando as principais preocupa??es e tend?ncias, mas tamb?m visando apreender como esse conhecimento ? produzido e divulgado no ?mbito odontol?gico. Articulamos uma abordagem quantitativa/qualitativa, estudando 2995 artigos. A an?lise do material emp?rico revela que, apesar de existir uma tend?ncia de crescimento dessa discuss?o, pouco tem sido publicado sobre o tema (1,9%). Al?m do mais, parece haver um descompasso entre a atual abordagem da (bio)?tica em odontologia e as atuais exig?ncias da vida, onde predominam os enfoques deontol?gico e legalista, parecendo corresponder apenas aos aspectos internos da profiss?o. Apesar disso, atrav?s da abordagem qualitativa foi poss?vel identificar caminhos para a constru??o de uma forma??o e pr?tica odontol?gicas mais complexas e integrais. Dentre as conclus?es, apontamos, ainda, que, esta investiga??o, mesmo diante de suas limita??es, parece oferecer subs?dios para reflex?o e posteriores estudos sobre o tema, servindo de par?metro para acompanhar a evolu??o do pensar (bio)?tico na odontologia