Quast D C, Biggerstaff R H, Haley J V
Am J Orthod. 1983 Jul;84(1):29-36. doi: 10.1016/0002-9416(83)90145-8.
To provide an improved data base for predicting the soft-tissue changes that accompany mandibular advancement surgery, short- and long-term serial cephalograms from the records of eighteen patients were analyzed. Hard- and soft-tissue landmarks were located on serial tracings and later were reduced to rectangular X-Y coordinates for computer-generated measurement data and statistical analyses. The interpretation of mean value, ratio, and regression equation data showed that the lower lip, inferior labial sulcus, and chin tissues moved forward and downward. The mandibular short-term (mean = 3.7 months postsurgery) horizontal change means were greater than the long-term (mean = 18 months postsurgery) horizontal change means. The posteriorly directed long-term means may result from functional adaptations that follow the short-term surgery-related spatial changes. These data also show the need for long-term prediction data to supplement the short-term data base.
为了提供一个更好的数据库，用于预测下颌前徙手术伴随的软组织变化，分析了18例患者记录中的短期和长期系列头颅侧位片。在系列描图上确定硬组织和软组织标志点，随后将其转换为矩形X-Y坐标，以生成计算机测量数据并进行统计分析。对均值、比率和回归方程数据的解释表明，下唇、唇龈沟和颏部组织向前下方移动。下颌短期（平均术后3.7个月）水平变化均值大于长期（平均术后18个月）水平变化均值。长期向后的均值可能是短期手术相关空间变化后功能适应的结果。这些数据还表明需要长期预测数据来补充短期数据库。
