颏部二级阶梯状截骨术矫正严重小颏畸形

目的探讨治疗严重小颏畸形的手术方法。方法经口腔内黏膜切口,显露下颌骨颏联合区,于颏孔下方作两道平行弧形截骨线,阶梯状前移,以钛板钛钉坚强内固定。结果2004年6月至2005年12月,共收治10例患者,均采用二级阶梯状截骨法。术后半年随访,颏部平均前移1.1cm,颏高平均增加0.7cm。截骨区骨愈合良好,形态满意。结论该方法可使颏部前移达到满意的幅度,并有一个自然的过渡,可有效改善颏部畸形。

Genioplasty with two-step osteotomy for severe microgenia

Objective To investigate a technique for correction of severe microgenia. Methods The mandibular symphysis was exposed through intraoral muscous incision. Two parallel osteotomies were performed under mental foramen. The mobilized segments were advanced like two steps and fixed rigidly with miniplate. Results From June, 2004 to Dec, 2005, 10 cases with severe microgenia were treated with this technique. The duration of follow-up was six months. The mean chin advancement was 1.1 cm and the mean chin vertical increase was 0.7 cm. All the patients healed very well with satisfactory aesthetic result. Conclusions With this two-step genioplasty, the chin can be moved to ideal position with a natural appearance. It is a reliable method for severe microgenia.