超声骨刀辅助颏成形术

Piezosurgery-assisted sliding genioplasty

目的探讨超声骨刀辅助颁水平截骨术矫治小颏畸形的临床应用价值。方法经口内下唇V形切口．于颏前区骨膜下剥离．注意妥善保护颏神经，在直视下采用电动骨锯行须部外板水平截骨，再用超声骨刀辅助颏内板水平截骨。将颏截骨段向前移动至矫治位后用钛板钛钉同定。共完成9例．女7例，男2例．年龄19～40岁。均为小颖畸形颏成形术者。结果超声骨刀完全可以截断颁部骨组织．比电动来复锯操作更加精确和容易。无发生口底软组织出血、血肿及感染之弊，伤口愈合良好。随访3～6个月，最迥颏的外形稳定，形态改善满意，无颏神经永久性损伤及下前牙髓坏死等并发症发牛。结论超声骨刀辅助颏截骨成形术有助于防止医源性意外损伤和获得良好的下术效果。

Objective To evaluate the value of the clinical application of piezosurgery-assisted sliding genioplasty. Methods A total of 9 patients （7 women, 2 man, aged 19-40 years） with micro- genia were performed operation by intraoral V incision with subperiosteal exposure of the mandibular memum area. Note relaxlionand preservation of the mental nerves. A horizontal osteotomy of cortical bone on anterior mandible was underwent by the conventional electric bone saw and internal plate bone was sectioned with the piezoelectric device. The segment was divided with preservation of the lingual soft tissue attachment and was adwmced in the mandibular mentumarea. These was fixed in the repo sition by titanium plate and screw for preventing displacement. Results The piezoelectric device pro- duced selective sectioning of the mineralized bone structures, bone was cut precisely without damage to vital anatomic structures and dental pulp, and was much easier to control and less aggressive, creating only minimal damage to soft tissues. The operative effects were satisfactory during 3-6 months of fol- low-up. Stable chin contours were created and became nature, latrogenic problems with bleeding, in feclion, mental nerve injury had been avoided. Conclusions Piezosurgery is a safe and precise technique to reduce the complication rate and to improve the treatment outcomes of genioplasties.