反复扩缩式快速扩弓联合前方牵引矫治安氏Ⅲ类错的效果评价

Evaluation of the correction effect of rapid repetitive expansion and constriction combined with maxillary protraction on classⅢ malocclusion

目的探讨反复扩缩式快速扩弓矫治联合前方牵引矫治安氏Ⅲ类错的治疗效果。方法选取安氏Ⅲ类错患者81例,其中男性41例,女性40例,平均年龄为(11.3±1.26)岁,对患者进行反复扩缩式快速扩弓矫治联合前方牵引矫治,并在实验前后分别检测患者的颊侧情况、牙齿排列、覆、覆盖及中线等指标,并采用PAR指数进行加权分析。结果矫治前PAR分值为(23.16±8.66)分,矫治后PAR分值为(1.84±2.44),减少了(21.32±9.18)分,矫治前后比较具有显著性差异(P<0.01)。PAR指标颊侧情况、牙齿排列、覆、覆盖及中线等矫治前后比较均具有显著性差异(P<0.05),所有患者未见有牙无改善或者恶化,改善患者占26.3%,极大改善患者占74.7%。结论反复扩缩式快速扩弓矫治联合前方牵引矫治能够有效治疗安氏Ⅲ类错。

Objective To evaluate the correction effect of rapid repetitive expansion and constriction combined with maxillary protraction on classⅢ malocclusion. Methods 81 patients （40 women and 41 men） with classⅢ maloc- clusion were selected and their average age was（16.12±3.26） years old. They were treated with rapid repetitive ex- pansion and constriction combined with maxillary protraction. Indicators concerning Buccal situation, teeth arrange- ment,draping,covering and centreline of patients were tested before and after the experiment and they also analysed according to the PAR indexes. Results Before treatment, the PAR score was （23. 16 ±8.66）. After treatment the PAR score was（1.84±2.44）, which had reduced by （21.32±9.18）. There was statistical significance in difference of PAR scores before and after treatment（ P 〈0.01）. The PAR indexes on buccal side, teeth arrangement, draping, cov- ering and center line before and after treatment were significantly different（ P 〈0.05）. Each patient was alleviated and none of them were deteriorated. The rate of improvement was 26.3% and patients with great improvement ac- counted for 74.7%. Conclusion Rapid repetitive expansion and constriction combined with maxillary protraction could cure ClassⅢ malocclusion effectively.