Le Fort Ⅰ型截骨术对上颌后缩患者腭咽部结构影响的研究

目的:探讨上颌Le Fort Ⅰ型截骨术对上颌后缩患者腭咽部结构的影响.方法:选择2007-2009年行上颌Le Fort Ⅰ型截骨术的上颌后缩伴随下颌前突患者42例(男20例,女22例,平均年龄21.6岁),所有患者在术前、术后1周、术后1年拍摄静止位头颅定位侧位片,然后对腭咽部软组织结构指标进行测量分析.结果:上颌...

Le FortⅠ Osteotomy on the Velopharyngeal Configuration of Maxillary Retrognathia Patients

Objective： To study the effect of the Le FortⅠ Osteotomy on the velopharyngeal configuration of maxillary retrognathia patients.Methods： A total of 42 patients with maxillary retrognathia and/or mandibular prognathia（20 males and 22 females,average age 21.6 years old） which underwent Le FortⅠ osteotomy and bilateral sagittal split ramus osteotomy between 2007—2009 were retrospectively reviewed.The X-ray examinations consisted of lateral cephalometric radiographs for each patient were undertaken preoperatively（T1）,one week postoperatively（T2）,and one year postoperatively（T3）,and 6 measure indexes of velopharyngeal configuration were collected and analyzed.Results： The average maxillary advancement distance was（5.21±2.33） mm.PNS-PhW,UL and ∠ANS—PNS—U had all significantly increased,and C—PhW T—PhW and UD had significantly decreased post-surgery compared with pre-surgery.No significant linear correlation was found between maxillary advancement distance and velopharyngeal configuration changes.Conclusion： Correction of maxillary hypoplasia by using Le FortⅠ osteotomy will increase the velopharyngeal cavity depth,which may impair velopharyngeal competence.The compensatory effects of velopharyngeal soft tissue may be alleviated this impairment at certain extent.