Predicting lower lip and chin response to mandibular advancement and genioplasty
Predicting lower lip and chin response to mandibular advancement and genioplasty
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DOI：
10.1067/mod.2002.128864
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发表时间：
2002-12-01
影响因子：
3
通讯作者：
Schow, SR
中科院分区：
文献类型：
--
作者：
Veltkamp, T;Buschang, PH;Schow, SR
这项回顾性研究的目的是检查与下颌前移和颏成形术相关的软组织变化的多方面性质，并建立预测模型。术前4周内和术后至少6个月（平均术后时间为11个月），对62例（男27例，女35例）非生长期患者在嘴唇静止状态下拍摄了中心位置的纵向头颅侧位片。下颌切牙和颏突分别手术前移约6 mm和11 mm。下唇轻微延长（2.5 +/- 3.8 mm），由于下唇变薄（-2.8 +/- 2.0 mm），其表面轮廓变直;唇颏褶轻微增厚（1.0 +/- 2.3 mm），软组织颏点轻微变薄（-0.8 +/- 2.2 mm）。多元回归模型（分别解释水平和垂直运动变化的80%至94%和66%至82%）表明，软组织对前移手术的反应取决于治疗前组织厚度、水平骨骼运动、垂直骨骼运动和上颌切牙的位置。当模型应用于15个受试者的独立验证样本时，解释了类似的变化量。结论是下唇和下巴对下颌前移和颏成形术的反应是多因素的，但可以准确可靠地预测。
The purposes of this retrospective study were to examine the multidimensional nature of soft tissue changes associated with mandibular advancement and genioplasty and to develop predictive models. Longitudinal lateral cephalograms of 62 nongrowing patients (27 men and 35 women) were taken in centric relation with the lips in repose within 4 weeks before surgery and at least 6 months postoperatively (median postsurgical duration was 11 months). The mandibular incisor and pogonion were advanced surgically approximately 6 mm and 11 mm, respectively. The lower lip lengthened slightly (2.5 +/- 3.8 mm), and its surface contour straightened because of thinning at labrale inferior (-2.8 +/- 2.0 mm); there was a slight thickening at the labiomental fold (1.0 +/- 2.3 mm) and a slight thinning at soft tissue pogonion (-0.8 +/- 2.2 mm). Multiple regression models (explaining from 80% to 94% and 66% to 82% of the variation for horizontal and vertical movements, respectively) showed that soft tissue response to advancement surgery depended on pretreatment tissue thickness, horizontal skeletal movement, vertical skeletal movement, and the position of the maxillary incisors. Similar amounts of variation were explained when the models were applied to an independent validation sample of 15 subjects. It was concluded that lower lip and chin response to mandibular advancement and genioplasty is multifactorial but can be accurately and reliably predicted.