McDonnell J P, McNeill R W, West R A
J Oral Surg. 1977 Aug;35(8):640-7.
Serial cephalometric evaluations were made of 15 patients a year after advancement genioplasty to assess skeletal changes, to relate these changes to net soft tissue profile change, and to develop predictive criteria for treatment planning. Coefficients of variance of regression equations, which incorporated selected independent variables, indicated that the variables, interval of time until follow-up records, and the extent of postsurgical horizontal resorption contributed only slightly to the observed variance in prominence of the soft tissue chin. For purposes of prediction, a ratio of 4:3 is recommended for the surgical horizontal advancement of the symphysis versus the net horizontal change in soft tissue chin point.
对15例患者在颏成形术推进一年后进行了系列头影测量评估，以评估骨骼变化，将这些变化与软组织侧貌的净变化相关联，并制定治疗计划的预测标准。纳入选定自变量的回归方程的方差系数表明，变量、随访记录前的时间间隔以及术后水平吸收程度对软组织颏部突出度的观察方差贡献甚微。为了进行预测，建议联合处手术水平推进与软组织颏点净水平变化的比例为4:3。
