Comparação entre dois métodos de cirurgia de modelos utilizados para cirurgia ortognática com seqüência invertida

• Autor(a) principal: Parente, Eduardo Varela
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/14161
• topic: Orthognathic surgery; Model surgery; Cirurgia Ortognática; Cirurgia de modelos; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::CIRURGIA BUCO-MAXILO-FACIAL

Bimaxillary orthognathic surgery represents a challenge for surgeons, especially, to reproduce the treatment plan in the actual surgery. Using a surgical splint is possible to obtain better reproduction of the surgical plan, however, to reach this, an accurate model surgery is essential. The aim of this study was to compare the accuracy of mandibular repositioning between two methods of model surgery used for planning orthognathic surgery with an altered surgical sequence. In this study, a resin skull was used to simulate the patient s hard tissue. Dental impressions were taken and models were constructed and mounted on a semi-adjustable articulator using a facebow transfer and wax bite registration. Predict tracings of 10 different treatment plans were made using Dolphin Imaging® software and then reproduced with both standard and modified methods of model surgery (T1). To improve the accuracy of mandibular repositioning evaluation, the model surgeries were repeated after one month (T2). The mandibular models were measured in Erickson Platform before and after the repositioning to contrast the results. The differences in laboratory time were also recorded. Descriptive statistics and t test were used to analyze the data and compare the results. This study suggested that vertical and mediolateral repositioning of the mandibular models were similar in both the methods, however, there was greater imprecision in the anteroposterior direction when the standard method was used for planning orthognathic surgery with altered surgical sequence. The time taken to reposition the mandibular model on a semi-adjustable articulator with the modified approach was significantly less than to reposition the maxillary model on the Erickson Platform.