目的探讨三维数字化在颏部水平截骨术中的应用效果。方法通过对颏部畸形患者的术前三维影像学测量,精确判断三维方向上畸形的程度,利用颏部水平截骨的手术方法,并将术前设计和手术导板进行统一,对截骨块进行移动,改善颏部畸形。结果本组20例患者均一期愈合,外形满意,术后均有不同程度的下唇麻木,术后1~6个月均恢复正常。结论精确的手术设计可以更加有效地改善颏部各类畸形。 Objective To explore the application of three-dimensional digitization in horizontal chin osteotomy. Methods By preoperative three-dimensional imaging measurement of chin deformity patients, to accurately determine the degree of deformity in three-dimensional direction, the use of horizontal chin osteotomy surgical methods, and preoperative design and surgical guide unified, the osteotomy Move to improve chin deformity. Results All the 20 patients in this group were cured in one time and the appearance was satisfactory. All patients had lower lip numbness to varying degrees after operation, and returned to normal after 1-6 months. Conclusion Accurate surgical design can be more effective in improving various types of chin deformity.