ABSTRACT
The main aim of advancement genioplasty is soft tissue and hard tissue stability which is important in improvement of the patients' aesthetics. The evaluation of the soft and hard tissue stability in advancement genioplsty was the aim of this study. The subjects in this study were 15 patients who presented with retrognathia. All of the 15 patients underwent advancement genioplasty alone to correct retrognathia. The soft and hard tissue pogonion in pre-operation, immediately post-operation, and 18 months after operation in tow groups of 9 patients with genial advancement equal or greater than 7 mm [means 7.16 mm] were assessed. After operation, no patient had infection or dehiscence and bone instability. In group 1 with advancement less than 7mm, hard tissue pogonion relapse was 0.60 +/- 0.66mm and soft tissue pogonion relapse was 1.55 +/- 0.46mm. I group 2 with advancement equal or more than 7mm, hard tissue pogonion relapse of 1.6 +/- 0.46mm and soft tissue pogonion relapse of 1.8 +/- 0.68mm were observed. Advancement genioplasty is a predictable operation specially when using rigid fixation. In this study, the result of operation in an 18 month period was stable