颏部是颜面结构的重要组成部分之一，颏部发育不足破坏容貌的整体美。我科采用预成的羟基磷灰石义颏作为颏成形术的植入物矫正小颏畸形４例，临床操作简单，远期效果良好。典型病例患者，女，２４岁，自觉颏部过小，要求手术。临床检查：正面观面部左右基本对称，面下１／... The chin is one of the most important parts of the facial structure. The chin is not enough to undermine the overall appearance of the face. In our department, preformed hydroxyapatite chin was used as an implants for genioplasty to correct 4 chinchillas deformities. The clinical operation is simple and the long-term effect is good. A typical case of patients, female, 24 years old, conscious chin is too small, requiring surgery. Clinical examination: Front view Basic facial symmetry, under the face 1 / ...