Estudo comparativo de três métodos radiográficos para avaliação da maturidade esquelética

• Ano de defesa: 2006
• Autor(a) principal: Paiva, Guilherme Assumpção Neves de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Cidade de São Paulo; Brasil; Pós-Graduação; Programa de Pós-Graduação Mestrado em Ortodontia; UNICID
• Palavras-chave em Português: Ortodontia; Indicadores biológicos; Desenvolvimento ósseo I; ODONTOLOGIA
• Link de acesso: https://repositorio.cruzeirodosul.edu.br/handle/123456789/1251

The aim of this research was to evaluate the correlation among skeletal maturation stages, estimated on the basis of hand and wrist ossification events, interpreted by the Martins method, as well as maturational changes in cervical vertebrae, specifically C2, C3, and C4, by means of the methods developed by Hassel and Farman and Baccetti, Franchi and McNamara Jr. Additionally, differences between genders, with respect to the skeletal maturation stages were investigated. The sample consisted of 220 hand-wrist and 220 lateral cephalometric radiographs of subjects aged 9 to 16 years, who underwent orthodontic treatment. Images were assessed by two orthodontists separately. Reproducibility was analyzed using the Spearman’s correlation tests and Kappa statistics. Linear regression models were used to test the correlation between categorical variables relative to the skeletal maturation stages, obtained by the interpretations of hand-wrist radiographs and cervical vertebrae evaluations, and chronological age. Categorical variables were also correlated and compared according to age group and gender using the Spearman’s correlation and the Chi-Square tests. The level of significance was set at 5%. All three methods, mainly Martins’ method, presented good reproducibility. The highest correlation ranks were obtained between the methods described by Baccetti, Franchi and McNamara Jr and Hassel and Farman (Rs≥0.70). On the other hand, when these were correlated to the Martins method, correlations in general were considered weak. Based on the linear regression models, a tendency for early skeletal maturation in girls was graphically demonstrated. Statistically significant differences were recorded between genders at the ages of 10, 11, 12, 13, 14 and 16 years, when the Martins method was applied. In accordance with the findings obtained by Hassel and Farman’s method, statistically significant differences were demonstrated at the ages of 11, 12 and 13 years. For the Baccetti, Franchi and McNamara Jr. method, statistical difference was found only at the age of 11 years. It can be concluded that, whenever a more accurate diagnosis is required, the orthodontist must complement the exams with a hand and wrist radiograph.