Analise cefalometrica pre-operatoria de pacientes com deformidades dentofaciais classe III submetidos a avanços maxilares / Preoperative cephalometric analysis of patients with class III dentofacial deformities treated with maxillary advancements

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The main purpose of this study was to evaluate the preoperative cephalometric diagnoses of skeletal Class III patients, who had been clinically diagnosed as maxillary defficient and undergone maxillary advancements with Le Fort I osteotomies in two teaching facilities. The preoperative lateral cephalometric radiographs of 50 patients treated with maxillary advancements, associated or not with genioplasties, were analyzed. Radiographs were hand traced and digitally traced using Dolphin Imaging 10 (Dolphin Imaging and Management Solutions, Chatsworth, CA, EUA), and McNamara, Steiner and Legan &Burstone analyses were used. The same operator performed all tracings three times to insure consistency and reliability. A mean value of the three tracings resulted for each measurement. The values were statistically analyzed using the t test for a mean (p_0.05) to compare them with the norm values. The paired t test was used to compare manual and digital results (p_0.05). Based on the results, three scientific articles were written, focusing on different aspects of the study and presented here in three chapters. Chapter 1 presents the dental-skeletal and soft tissue analyses obtained from hand tracing and confronted with cephalometric norms. Chapter 2 focuses on incisor inclinations, presenting the results and discussing the importance of dental compensations on treatment planning and outcomes of orthognathic surgery. In chapter 3, manual and digital cephalometric analysis are presented and compared statistically. Based on the results, the conclusions are: (1) cephalometric analysis of patients with Class III dentofacial deformities had no significant correlation with clinical diagnosis for most of the analyzed parameters; (2) most of the Class III patients undergoing maxillary advancements presented incomplete decompensation of incisors in the immediate preoperative radiographs; (3) digital cephalometric analysis had no correlation with manual analysis when the described methodology was used.

ASSUNTO(S)

cirurgia ortognatica cefalometria cephalometry orthognathic surgery

ACESSO AO ARTIGO

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