Estudo do papel dos incisivos superiores permanentes na análise da dentição mista: relação entre incisivos inferiores e superiores

Abstract

The assessment of the discrepancy between the available space in the dental arch and the space required for the alignment of permanent teeth is an important aspect for early diagnosis and orthodontic planning. Several studies have already been conducted to predict the mesiodistal size of unerupted teeth using radiographs, equations, and tables. This study aimed to analyze the relationship between lower and upper incisors to predict the measurements of these teeth through this relationship. For this purpose, 200 plaster models of both sexes were used, in which the incisors were measured at their greatest mesiodistal width with the help of a centesimal digital caliper. A linear regression analysis was conducted to investigate the relationship between the size of the upper and lower permanent incisors. The data obtained were analyzed in the R software (R Core Team, 2022), and the graphs were created using the ggplot2 package (Wickham, 2009). The linear regression equation resulted in the predictive formula UIP = 6.535 + 1.068 × PLI. It was concluded that there is a relationship between the lower and upper permanent incisors, with no significant difference between the gender.