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Relação das medidas mésio-distais dos dentes com a discrepância de Bolton anterior
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Advisor(s)
Abstract(s)
Objetivos: Investigar se as medidas dos incisivos laterais são determinantes na discrepância da proporção dos dentes anteriores, comparando entre grupos com discrepância de Bolton anterior aumentada, reduzida e dentro da norma, e ainda validar a fórmula de cálculo Simplified Anterior Tooth Ratio (SATR) para a população portuguesa.
Materiais e métodos: Para este estudo observacional e retrospetivo, foram medidos 266 modelos de estudo, obtidos na consulta assistencial de ortodontia da clínica Universitária Egas Moniz, entre novembro de 2010 e outubro de 2023. Realizou-se calibração intra e inter-operador. Dividiu-se a amostra de acordo com a classe de Angle. A análise estatística foi realizada através IBM SPSS Statistics versão 24.0 for Windows (Armonk, NY: IBM Corp.). Foram calculadas estatísticas descritivas como média e desvio padrão para o tamanho dos dentes. As médias populacionais foram estimadas calculando-se 95% de confiança nos intervalos (IC 95%). Utilizou-se uma tabela de dupla entrada no nível de concordância dos valores de Bolton anterior como valor de referência. A análise da área sobre a curva (ROC/AUC), foi utilizado o pacote de pROC para R e os gráficos desenvolvidos a partir do pacote ggplot2.
Resultados: A amostra é composta por 161 mulheres e 105 homens, com uma média de idades de 19.8 ± 7. Obtivemos diferenças estatisticamente significativas para os incisivos laterais superiores e inferiores, comparando entre os diferentes tipos de Bolton anterior, tendo esses dentes sido identificados como dentes-chave. O valor norma de SATR para população portuguesa é de 89.98% ± 8.24%. Este estudo apresentou resultados de especificidade e sensibilidade elevados para a aplicação do SATR na população portuguesa.
Conclusão: Os incisivos laterais superiores e inferiores mostraram que podem ser utilizados para determinar a discrepância da proporção dos dentes anteriores. A aplicação do SATR na população portuguesa é viável e revelou-se eficaz.
Objectives: To investigate whether the measurements of the lateral incisors are a determining factor in the discrepancy of the proportion of anterior teeth, comparing groups with increased, reduced and within the norm anterior Bolton discrepancy, and also to validate the Simplified Anterior Tooth Ratio (SATR) calculation formula for the Portuguese population. Materials and methods: For this observational and retrospective study, 266 study models were measured at the orthodontic clinic of the Egas Moniz University Clinic between November 2010 and October 2023. Intra and inter-operator calibration was carried out. The sample was divided according to Angle class. Statistical analysis was carried out using IBM SPSS Statistics version 24.0 for Windows (Armonk, NY: IBM Corp.). Descriptive statistics such as mean and standard deviation were calculated for tooth size. Population means were estimated by calculating 95% confidence intervals (95% CI). A double-entry table was used for the level of agreement of the anterior Bolton values as a reference value. Analysis of the area over the curve (ROC/AUC), the pROC package for R was used and the graphs developed from the ggplot2 package. Results: The sample consists of 161 women and 105 men, with an average age of 19.8 ± 7. We obtained statistically significant differences for the upper and lower lateral incisors, comparing between the different types of anterior Bolton, and these teeth were identified as key teeth. The standard SATR value for the Portuguese population is 89.98% ± 8.24%. This study showed high specificity and sensitivity results for the application of SATR in the Portuguese population. Conclusion: The upper and lower lateral incisors have shown that they can be used to determine the discrepancy in the proportion of anterior teeth. The application of the SATR in the Portuguese population is feasible and proved to be effective.
Objectives: To investigate whether the measurements of the lateral incisors are a determining factor in the discrepancy of the proportion of anterior teeth, comparing groups with increased, reduced and within the norm anterior Bolton discrepancy, and also to validate the Simplified Anterior Tooth Ratio (SATR) calculation formula for the Portuguese population. Materials and methods: For this observational and retrospective study, 266 study models were measured at the orthodontic clinic of the Egas Moniz University Clinic between November 2010 and October 2023. Intra and inter-operator calibration was carried out. The sample was divided according to Angle class. Statistical analysis was carried out using IBM SPSS Statistics version 24.0 for Windows (Armonk, NY: IBM Corp.). Descriptive statistics such as mean and standard deviation were calculated for tooth size. Population means were estimated by calculating 95% confidence intervals (95% CI). A double-entry table was used for the level of agreement of the anterior Bolton values as a reference value. Analysis of the area over the curve (ROC/AUC), the pROC package for R was used and the graphs developed from the ggplot2 package. Results: The sample consists of 161 women and 105 men, with an average age of 19.8 ± 7. We obtained statistically significant differences for the upper and lower lateral incisors, comparing between the different types of anterior Bolton, and these teeth were identified as key teeth. The standard SATR value for the Portuguese population is 89.98% ± 8.24%. This study showed high specificity and sensitivity results for the application of SATR in the Portuguese population. Conclusion: The upper and lower lateral incisors have shown that they can be used to determine the discrepancy in the proportion of anterior teeth. The application of the SATR in the Portuguese population is feasible and proved to be effective.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Discrepância de Bolton Incisivos laterais