前方牵引治疗上颌骨发育不足：扩弓组与未扩弓组的疗效比较

目的:比较联合使用前方牵引和上颌快速扩弓与单纯使用前方牵引治疗上颌骨发育不足的临床效果。方法:选择20例9～11岁上颌骨发育不足的儿童,分为2组,A组(10例)在进行前方牵引前快速扩弓1～2周,B组(10例)直接进行前方牵引,两组治疗前及治疗后均拍摄头颅侧位片,以McNamara测量法及传统分析项目进行头影测量分析。结果:(1)两组病例上颌骨及上牙弓前移,前牙反牙合改正,软组织侧貌明显改善。(2)扩弓组下颌骨向后下旋转,侧貌改善更为显著。结论:(1)替牙牙合期进行上颌前方牵引,可有效矫治上颌骨发育不足。(2)上颌前牵引扩弓组产生下颌骨后下旋转,软组织侧貌改善更为显著,对低角病例更为适宜。

Treatment effects of the maxillary protraction in correction of maxillary deficiency:A comparative study between RPE group and no RPE group

PURPOSE: To compare the clinical effects of rapid palatal expansions combined with maxillary protractions to that of maxillary protractions of the maxillary deficiency alone. METHODS: Twenty patients aging from 9 to 11 years were divided into two groups , each group had 10 patients. All patients were diagnosed as having deficient maxillas with anterior crossbite. Group A were treated with rapid palatal expansion before maxillary protraction.Group B were treated with maxillary protraction alone. Lateral cephalometric films were taken at the beginning and the end of the treatment, and analyzed with McNamara analysis(Co-A,Co-Gn,ANS-Me) and traditional analysis. RESULTS: (1)After maxillary protraction,the maxilla and upper dentitions were protracted in both groups,the anterior crossbite had been corrected and obvious profile changes can be observed.(2)The mandible moved backward and downward in the RPE group and more obvious profile changes can be achieved compared with no RPE group. CONCLUSION: (1) It's an effective method to manage the maxillary deficiency with maxillary protraction in the mixed dentition.(2) Applying maxillary protraction combined with RPE is more adaptable to low angle cases.