PURPOSE: To Explore the application of orthognathic surgery to treat malunioned fracture of maxillofacial bone, and the methods in reconstructing facial shape and occlusion.

• 摘要目的：探讨正颌外科技术在颌面部陈旧性骨折中的临床应用，以寻找恢复面部外形和正常咬合关系的方法。