PASS矫治器对AngleⅡ类2分类错牙合矫治前后面部软硬组织侧貌变化的临床研究

THE CLINICAL RESEARCH OF PASS APPLIANCE ON FACIAL HARD AND SOFT TISSUE PROFILE CHANGES FOR ANGLE Ⅱ TYPE 2 CLASSIFICATION OF MALOCCLUSION BEFORE AND AFTER TREATMENT

目的通过矫治前后的一些软硬组织侧貌指标变化来评价临床正畸治疗效果。方法选择2012—2014年就诊于唐山市协和医院的10例前牙闭锁性深覆牙合的患者,男6例,女4例,年龄12~21岁,平均15.8岁。均为非拔牙矫治,运用PASS矫治器完成矫治,拍摄治疗前后X线头颅定位侧位片,进行治疗前后的X线头影测量研究。分析比较治疗前后软硬组织发生的数值指标变化。结果 （1）治疗前后硬组织的变化为：∠SNA,∠ANB,∠U1-L1明显减小,∠SNB,U1-NA（mm）,∠U1-NA,L1-NB（mm）,∠L1-NB,∠U1-SN,∠L1-MP,下颌平面角MP-FH,L6-Ptm（mm）,明显增大。（2）矫治前后软组织侧貌指标比较分析,鼻唇角Cmsnls变小,∠S-N＇-B＇,下唇H线距L1-H,下唇长Stmi-Mes的距离均增大。（3）矫治前后颏唇沟角LiB＇Pg＇未发生明显变化（P〉0.05）,差异无统计学意义。结论 PASS矫正器矫治后硬组织侧貌及软组织侧貌有所改善,而AngleⅡ类2分类错牙合的矫治以牙性改变为主,并在一定程度上引起软组织侧貌改变。

Objective To evaluate clinical effect of orthodontic treatment by the changes of hard and soft tissue profile before and after orthodontic treatment.Methods Ten patients with orthodontic treatment of front tooth atresia were chosen in Tangshan Stomatological Hospital from2012 to 2014,including 6 male patients and 4 female patients from12~21 years old with the average age of 15.8.PASS appliance was used to the orthodontic treatment of front tooth atresia,and head profile X-ray was performed for all patients,then the changes of sofe and hard tissue profile were compared before and after orthodontic treatment.Results After treatment for hard-tissue changes：∠SNA,∠ANB,∠U1-L1 significantly reduced;but∠SNB,U1-NA（mm）,∠U1-NA,L1-NB（mm）,∠L1-NB,∠U1-SN,∠L1-MP,mandibular plane angle MP-FH,L6-Ptm（mm）were significantly increased.The soft tissue profile changes after the orthodontic treatment were：CmSnLs was lessening while S-N＇-B＇was enlarged and the there was increasing distance in L1-H and Stmi-Me.There was no exchange in LiB＇Pg＇index before and after therapy,and no statistically significant（P〉0.05）.Conclusion PASS appliance can improve hard tissue profile and soft tissue profile,while the orthodontic treatment of Angle class II Division2 malocclusion was the changes of teeth,and it also can induce soft tissue profile changes.