Comparação das razões lineares das vértebras cervicais por tomografia computadorizada de feixe cônico (TCFC)
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Data
2012-07-16
Autores
Mendonça, Tássia Mara Fernandes [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Este estudo teve como objetivo avaliar possíveis diferenças das razões lineares da segunda e da terceira vértebras cervicais em cinco estágios do surto de crescimento puberal (SCP) avaliadas por tomografia computadorizada de feixe cônico (TCFC). Foram selecionados 26 exames de TCFC e as respectivas radiografias de mão e punho, de pacientes do sexo masculino e do feminino, com idades entre 8 e 18 anos e 11 meses. A amostra selecionada foi dividida em cinco grupos de acordo com os eventos de ossificação presentes nas radiografias de mão e punho, seguindo a curva de crescimento proposta por Martins e Sakima (1977), modificada por Mercadante (1996). Os exames tomográficos foram analisados por meio do próprio software do equipamento I-Cat® sob a extensão de arquivo “xstd”. De posse do plano sagital ajustado ao protocolo de imagem foram realizadas, de forma objetiva, as mensurações das vértebras C2 e C3, por meio de onze pontos, a partir dos quais oito distâncias lineares foram obtidas. Baseados nestas, foram calculadas quatro razões, sendo uma de C2 e o restante de C3. Para verificar a existência de diferenças entre as razões obtidas para os cinco grupos da curva de crescimento, foi realizado o teste estatístico de análise de variância (Anova), fator único, associado ao teste de homogeneidade de Tukey para caracterizar cada fase do SCP. O nível de significância adotado foi de 95% para todas as análises. Verificou-se que o método é reprodutível (r2=0,994), sendo crescente as razões C2R, C3R e AL conforme as fases do SCP. Já para ASAP, observou-se aumento apenas nas fases 1, 3 e 5. De acordo com os resultados obtidos foi possível concluir que houve diferenças estatisticamente...
This study aimed to evaluate possible differences of linear ratios of the second and third cervical vertebrae in five stages of pubertal growth spurt (PGS) evaluated by cone beam computed tomography (CBCT). A total of 26 CBCT scans and their hand and wrist radiographs of males and females, aged between 8 and 18 years and 11 months. The sample was divided into five groups according to the events of ossification present in the hand and wrist radiographs, following the curve of growth proposed by Martins and Sakima (1977), modified by Mercadante (1996). CT scans were analyzed using the software itself I-Cat ® equipment under the file extension xstd. Having the sagittal image adjusted to the protocol were performed in an objective way, measurements of C2 and C3, by eleven points, from which eight linear distances were obtained. Based on these, four were calculated reasons, one of C2 and C3 of rest. To check for differences between the ratios obtained for the five groups of the growth curve was performed to test statistical analysis of variance (ANOVA) single factor associated with the Tukey’s test of homogeneity to characterize each phase of the PGS. It was found that the method is reproducible (r2 = 0.994), with increasing ratios C2R, and AL C3R as phases of SCP. As for ASAP, growth observed only stages 1, 3 and 5. According to the results we conclude that statistically significant differences between the... (Complete abstract click electronic access below)
This study aimed to evaluate possible differences of linear ratios of the second and third cervical vertebrae in five stages of pubertal growth spurt (PGS) evaluated by cone beam computed tomography (CBCT). A total of 26 CBCT scans and their hand and wrist radiographs of males and females, aged between 8 and 18 years and 11 months. The sample was divided into five groups according to the events of ossification present in the hand and wrist radiographs, following the curve of growth proposed by Martins and Sakima (1977), modified by Mercadante (1996). CT scans were analyzed using the software itself I-Cat ® equipment under the file extension xstd. Having the sagittal image adjusted to the protocol were performed in an objective way, measurements of C2 and C3, by eleven points, from which eight linear distances were obtained. Based on these, four were calculated reasons, one of C2 and C3 of rest. To check for differences between the ratios obtained for the five groups of the growth curve was performed to test statistical analysis of variance (ANOVA) single factor associated with the Tukey’s test of homogeneity to characterize each phase of the PGS. It was found that the method is reproducible (r2 = 0.994), with increasing ratios C2R, and AL C3R as phases of SCP. As for ASAP, growth observed only stages 1, 3 and 5. According to the results we conclude that statistically significant differences between the... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Tomografia, Radiografia - Qualidade da imagem, Ortodontia preventiva
Como citar
MENDONÇA, Tássia Mara Fernandes. Comparação das razões lineares das vértebras cervicais por tomografia computadorizada de feixe cônico (TCFC). 2012. 72 f. Dissertação (mestrado) – Universidade Estadual Paulista, Faculdade de Odontologia de São José dos Campos, 2012.