C形截骨术治疗颧骨颧弓过突

目的 探讨C形截骨术矫正颧骨颧弓过突的手术方法.方法 根据颧骨颧弓肥大的程度和特点,全身麻醉下经口内入路自颧牙槽嵴外侧经眶外下缘到颧弓与眶骨外缘交接处做两条平行C形截骨线,两截骨线间距由颧弓需缩短程度而定,以来复锯截断截除中间骨块,骨凿凿断残余骨连接.耳屏前颞部发际内做长1.5～2.0 cm切口,切开皮肤及皮下,顺面神经走向钝性分离至骨膜,切开骨膜显露颧弓根部,在关节结节前方由后向前斜行截断颧弓.将颧骨颧弓向内上方移动靠拢后以钛板固定.结果 共完成12例,均取得良好效果.结论 C形截骨术矫正颧骨颧弓过突,不损伤上颌窦,面部软组织无下垂,术后效果明显,特别是对颧弓肥大者效果更佳.

Prominent zygomatic complex reduction by C-type osteotomy

Objective To explore the operation of C-type osteotomy for reduction of prominent zygomatic complex. Methods Based on the severity and characteristics of prominent zygomaitc complex, Ctype osteotomy was designed for the malar complex reduction by using oral and minor pre-auricular approaches under general anaesthesia. Two paralleled osteotomic lines of C-type were marked from zygomatic alveola to the conjunction of lateral orbital margin and zygomatic arch through the inferio-lateral edge of orbit. The extension of zygomatic arch reduction was determined the width of two osteotomic lines. The bone which marked lines was removed by reciprocating saw and osteotome. The zygomatic arch root was osteotomiced by pre-auricular approaches. Then, the zygomatic complex could move freely towards superior-medial position. Finally, the zygoma was fixed with titanium mini-plates. Results 12 patients with prominent zygomatic complex had been successfully operated by C-type osteotomy from July 2006 to April 2009. Of them, six cases were symmetrical and six cases were unsymmetrical. Postoperative follow-up for 4-24 months, infection was not occurred, and the scar of pre-auricular incision was not obvious. All the patients obtained positive results. Conclusion C-type osteotomy for correction of prominent zygomtic complex through intra-oral and minor pre-auricular approach is an effective surgical method and gives superior results. It preserves the intactness of maxillary sinus, prevents facial slack, and is especially effective for patients with prominent zygomatic arch.