摘要
目的探讨女性下颌角轮廓特点,量化下颌骨截骨范围,寻找适合手术方法的途径。方法术前X线测量正常女性面部下颌角的间距比值,得到下颌角与下面部和颧部协调的比例关系;针对下颌角肥大特点,分别采用耳后切口、口内切口、口内外联合切口和咬肌注射肉毒毒素的方法,矫正下颌角肥大。结果测得正常女性下颌角度为(120.0±5.9)°、升支髁突垂线夹角为(10±2)°、乳突下颌角高度与下面高度比值为1∶(2.00±0.30)。硬组织正位片测量,双下颌角间距与双颧间距比值为1∶(1.30±0.14);软组织侧位测量,耳垂下颌角高度与下面高度比值为1∶(2.00±0.20);软组织正位片测量,双下颌角间距与双颧间距比值为1∶(1.20±0.12)。32例患者中,7例行耳后切口,5例行口内外联合切口,10例行口内切口,3例行耳后切口附加口内切口,7例行咬肌注射肉毒毒素。术后均取得了满意的手术效果。结论术前量化截骨范围,不仅有利于手术方法的选择,而且可以使下颌角与下面部和颧部的比例更协调。
Objective To explore the character of PMA outline, estimate the extent of osteotomy and select operative approach. Methods The ratio of the distance of the normal mandibular angle with the PMA length of lower face and position of zygometic arch were obtained by preoperative by X - ray. Intra - oral incision, postauricular incision and Botox injection in the masseter muscle approaches were 3 approches used for correcting PMA. Resells The normal mandibular angle was 120.0 ± 5.9°, the angle between the vertical line of condylar process and mandibular ramus was 10 ± 2°, the ratio between mandibular angle and height of mastoid process was 1 ： 2.0 -＋ 0.3. According to measurement of the sclerous and soft tissues, the distance ratio between both mandibular angle and both zygomatic process was 1 ： 1.30±0.14 and 1 ： 1.20 ± 0.12 respectively. Tirtytwo female patients with PMA were treated by osteotomy or Botox injection. Conclusion Estimate of the intended extent of osteotomy was not only beneficial for selection of the operative approachs but also for better harmonizing the proportion of lower face with zygomatic processes and mandibular angle. This is a good method which will result in excellent outcomes and avoid complications.
出处
《中国美容整形外科杂志》
CAS
2007年第1期6-8,共3页
Chinese Journal of Aesthetic and Plastic Surgery
关键词
下颌角
截骨
量化
Mandibular angle
Osteotomy
Measure
