摘要目的 探究容貌美人群下颌骨美学特点和下颌角点美学定位,建立容貌美人群下颌骨三维测量数据库.方法 选取整形医师和普通人员普遍认同的下颌骨漂亮志愿者14例,行头颅CT检查,利用Mimics18.0软件行颅面骨三维重建,测量能够体现下颌骨三维美学各参考点间距离、角度和比例,将测量数据导入SPSS22.0统计软件进行统计学分析.采用配对t检验对左右侧下颌骨的对称性进行分析.建立容貌美下颌骨动态资料库,数据经统计处理得出均数、标准差、标准误和95％置信区间.结果 容貌美人群下颌角角度为123.91°,下颌骨倾度平均值为27.03°,下颌骨体部长度和升支高度之比接近于2∶1,颏孑孔下颌角间距与升支高度之比接近1.4∶1.0.结论 下颌骨美学特征有助于下颌角肥大整形和下颌角修复重建患者新的下颌角点的精准定位,为手术的设计、模拟和实施提供帮助.

abstractsObjective To aesthetically evaluate the mandible,to position the gonion landmark of the aesthetic female with digital techniques and to establish three-dimensional mandibular measurements database of the aesthetic female.Methods 14 aesthetic volunteers were chosen by plastic surgeons and ordinary people based on the identical view of esthetic mandible.The heads were scanned by a spiral CT scanner,and the data were imported into Mimics 18.0 to generate the 3D skull images.Distance,angle and ratio measurements,which could represented the aesthetic characters of the mandible,were made on the images.All the data were transferred into the SPSS 22.0 software to perform statistical analysis.A two-tailed t test was used to compare the symmetry of bilateral mandibles.Dynamic database of aesthetic mandibles was established.The mean,standard deviation,standard error and 95％ confidence interval of data were calculated by statistical software automatically.Results The results suggested that the mean of aesthetic mandibular angle was 123.91°,and the mean of mandibular plane angle was 27.03°.The ratio between the mandibular body and ramus approximated to 2 ∶ 1,and the ratio of the distance between gonion and mental foramen to ramus was close to 1.4.Conclusions The study of mandibular esthetics contributes to positioning the new gonion accurately for patients with prominent mandibular angle and gonion reconstruction,and it can assist surgeons in surgical designing,simulating and performing.