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目的:探讨采用前方牵引方案治疗安氏Ⅲ类错的临床疗效及美学效果,为今后临床此类患者的矫正提供更科学的指导和参考。方法:选择2014年1月-2014年12月在笔者科室治疗的26例安氏Ⅲ类错牙合患者作为观察对象,对所有病例进行SNA、SNB、ANB、上中-NA、下中-NB、上下中切牙角、SN-MP、FH-MP、Y轴角的测量,对比矫正前后的数据。同时测量上气道项目,包括PNS-UPW、PNS-Ad2、OAW1、OAW2、OAW3、SPP-SPPW、U-MPW、V-LPW;对面部美容指标(ALs-FH、BLi-FH、ALs-BLi、Li-b-Pos、Ls-REP、Li-REP、Z角、Pg B-FH、Ns Pg-FH、G-Sn-Pg)进行观察。结果:在通过矫正前方牵引矫正治疗后,患者的SNA角、ANB角、SNB角、上中-NA角、下中-NB角、SN-MP角、FH-MP角要明显优于矫正前,差异具有显著性(P<0.05);鼻咽段PNS-UPW、PNS-Ad2治疗后变化明显,较治疗前差异显著,具有统计学意义(P<0.05);治疗后ALSFH、BLi-FH、ALs-BLi、Ls-REP、Li-REP、Z角、Pg B-FH和G-Sn-Pg相比与治疗前存在显著的统计学差异(P<0.05)。结论:前方牵引方案治疗安氏Ⅲ类错疗效确切,患者满意,保证了患者上颌骨、下颌骨正常的生长状态,操作简单,起效快,值得推广。
OBJECTIVE: To investigate the clinical efficacy and aesthetics of the treatment of Angle Class Ⅲ malocclusion with anterior traction in order to provide more scientific guidance and reference for the clinical correction of such patients in the future. Methods: Twenty-six patients with Class III malocclusion treated in our department from January 2014 to December 2014 were selected as the observation subjects. All cases were selected for SNA, SNB, ANB, upper middle-NA, lower middle-NB , Upper and lower incisors angle, SN-MP, FH-MP, Y axis angle measurement, before and after correction of the data. The upper airway items including PNS-UPW, PNS-Ad2, OAW1, OAW2, OAW3, SPP-SPPW, U-MPW and V-LPW were also measured. The facial cosmetic indexes (ALs-FH, BLi-FH, ALs-BLi , Li-b-Pos, Ls-REP, Li-REP, Z angle, Pg B-FH, Ns Pg-FH, G-Sn-Pg). Results: SNA angle, ANB angle, SNB angle, upper mid-NA angle, lower mid-NB angle, SN-MP angle and FH-MP angle were significantly better than those before orthodontic treatment after straightening orthodontic treatment. The difference was significant (P <0.05). The changes of PNS-UPW and PNS-Ad2 in nasopharyngeal pharynx were significantly different after treatment compared with those before treatment (P <0.05). The ALSFH, BLi-FH and ALs There was a significant difference (P <0.05) between pretreatment and BLI, Ls-REP, Li-REP, Z angle, Pg B-FH and G-Sn-Pg. Conclusion: The treatment of Class Ⅲ malocclusion with frontal traction is effective and satisfactory. It ensures the normal growth of maxilla and mandible in patients with simple operation and rapid onset of action. It is worth popularizing.