Comparison between manual and software surgical planning predictions in orthognathic surgery / Comparação entre os prognósticos do planejamento cirúrgico manual ou porSoftware em cirurgia ortognótica

RESUMO

Objetivo: Avaliar comparativamente o prognostico do planejamento cirurgico por software com o metodo manual. Metodo: Radiografias laterais cefalometricas e modelos de estudo pre e pos-cirurgia de vinte pacientes Classe III (12 mulheres e 8 homens, media de idade 22,5 ñ 2,3) que tinham se submetidos a cirurgia no Departamento de Ortodontia. Para o planejamento manual, com combinacao de oclusogramas pre e pos-cirurgia com radiografias cefalometricas laterais de cada paciente, foram feitas analises tridimensionais. Prognosticos da movimentacao esqueletica foram elaborados. Em seguida, mensurou-se tridimensionalmente a movimentacao esqueletica. Quinze variaveis angulares e lineares foram avaliadas e os resultados analisados estatisticamente. Para cada paciente, o prognostico manual e por software antes e apos a cirurgia foram comparados entre si. O teste t pareado foi usado para verificar possiveis diferencas (p<0,05). Resultados: Nao foram observadas diferencas entre os metodos. Conclusao: O Software Dolphin Imaging (versao 10) tem boa acuracia para a predicao do resultado pre e pos-cirurgico de cirurgias ortognaticas.

ABSTRACT

Objective: To evaluate the proximity of computer imaging soft ware surgical planning prediction methods, with standard manual methods. Method: Lateral cephalometry radiographs and study cast records of pre and post surgery of twenty longface Cl III patients (12 Females and 8 Males, mean age 22.5 ñ 2.3), that had been undergone surgery in Department of Orthodontics. For manual prediction, with combination of pre and post surgical occlusograms with lateral cephalometric radiograph tracings of each samples, three dimensional analysis was done. Predictions of skeletal movement with tacing overlay method, has prepared. Finally, measured the rate of skeletal movements at in three dimensional of spaces. Fifteen angular and linear variables were measured, and the results, analyzed using the statistical soft ware statistics. For each patient, the manual and computer soft ware prediction before and after surgery were compared with each other. The paired t-test was used to evaluate possible differences between manual and computer soft ware prediction (p<0.05). Results: The difference of the variables of the soft ware prediction in the pre and postsurgical stages in comparison with standard manual prediction method was insignificant. Conclusion: Dolphin Imaging software (version 10.0) has a good accuracy for prediction of pre and postsurgical outcome of orthognathic samples.