Bachmann J, Wisth P J
J Oral Maxillofac Surg. 1983 Jan;41(1):17-23. doi: 10.1016/s0278-2391(83)80025-1.
Two methods for prediction of the soft tissue profile subsequent to oblique subcondylar osteotomy for correction of mandibular protrusion were evaluated. The first one included distalization of the mandible into an Angle Class I relationship. The amount of distalization and any vertical changes were transferred to the tracing, and the anticipated new profile was drawn. The second method was based on the profile means of a group of "normal" persons and was aimed at correction of both sagittal and vertical discrepancies. Fifty patients were studied. A double set of prediction tracings was made according to both methods; and the results were compared with the actual postoperative results and with a "normal" control group. Both methods were usable, as the predictions were considered satisfactory if they were within one standard deviation from the mean of the control group. The sagittal changes were somewhat exaggerated by both analyses. The vertical changes were much better expressed by the profile prediction. Such changes are difficult to create by the vertical subcondylar osteotomy. Consequently, the model prediction seems most suitable for planning profile changes in surgical techniques that include mobilization of one main mandibular fragment.
对两种用于预测髁突下斜行截骨术矫正下颌前突后软组织侧貌的方法进行了评估。第一种方法包括将下颌远中移动至安氏Ⅰ类关系。远中移动量及任何垂直变化被转移至描图上，并绘制出预期的新侧貌。第二种方法基于一组“正常”人的侧貌均值，旨在矫正矢状和垂直差异。对50例患者进行了研究。根据两种方法制作了两组预测描图；并将结果与实际术后结果以及“正常”对照组进行比较。两种方法均可用，因为如果预测值在对照组均值的一个标准差范围内，则认为预测结果令人满意。两种分析对矢状变化均有一定程度的夸大。垂直变化通过侧貌预测能更好地体现。通过髁突下垂直截骨术很难产生这样的变化。因此，模型预测似乎最适合规划包括一个主要下颌骨块移动的手术技术中的侧貌变化。
