目的 :探讨功能矫治器矫治安氏 类 I分类错的软组织变化。方法 :对 2 9例安氏 类 I分类错患者用功能矫治器 (FR- 2 )矫治前后的 X线头影测量片进行分析。对比治疗前后 5项软组织指标的变化。结果 :早期的功能矫形治疗 ,患者多数指标接近正常值范围 ,但也有部分指标改善不明显。结论 :功能矫治器能使软组织侧貌得到明显改善 ,但存在个体差异 ,部分病例仍需要二期治疗 Objective: To investigate the soft tissue changes of Class A malocclusion treated with functional appliance. Methods: 29 patients with Class Ⅰ malocclusion were treated with functional appliance (FR-2) before and after treatment of X-cephalometry analysis. The changes of 5 soft tissue indexes before and after treatment were compared. Results: Early orthopedic treatment, most of the patients close to the normal range of indicators, but there are some indicators did not improve significantly. Conclusion: Functional appliance can significantly improve the soft tissue profile, but there are individual differences, some cases still need two treatment