快速扩弓+前方牵引矫治骨性Ⅲ类错  

Skeletal Ⅲ malocclusion orthopedics after PAR index evaluation

作　　者：冉屹东 张红[1] 

机构地区：[1]保定市第二医院口腔科,河北保定071000

出　　处：《医学研究与教育》2010年第4期35-37,共3页Medical Research and Education

摘　　要：目的探讨应用快速扩弓+前方牵引矫治骨性Ⅲ类错的临床效果。方法选择26例生长发育期的骨性Ⅲ类错应用快速扩弓+前方牵引的方法进行矫治,对矫治前后的X线头颅侧位片和石膏模型进行测量,比较治疗前后软硬组织的变化及PAR指数评价。结果 A点前移2.26mm,SNA角、ANB角、ANS-Ptm、Wits值均增大,SNB角减小,且差异有统计学意义(P<0.05)。PAR指数评分:治疗前后总分减少19.59分,减少百分率为83.12%,治疗后覆盖、覆、后牙咬合改善程度较大,所有患者前牙反解除,但牙齿排列及中线改善程度不明显。结论前方牵引治疗生长发育期骨性Ⅲ类错是十分有效的,有利于Ⅲ类骨骼的调整,但还需固定矫治器进一步调整后牙咬合、牙齿排列及中线。Objective To explore the effects of treatment method for skeletal call Ⅲ malocclusion cases treatad with rapid palatal expansion,maxillary protraction.Methods Twenty-six patients whose skeletal class Ⅲ malocclusion were in growth spurt of puberty were selected,their cephalometry radiographs and plaster model were measured and analyzed among pre-treatment and post-treatment to compare the changes of bone tissue and soft tissue and evaluate PAR inder.Results Point A moved forwards 2.26mm.The SNA、ANBNAPA,ANS-Ptm and Wits increased,SNB decreased.There was significant difference.PAR index： the total score of weighted PAR decreased to 19.59 value,the decreased percentage was 83.12%.OJ、OB and the backteeth holcling-on midline improved significantiy after treatment.All cases of front teeth anteriorcrossbite were treated well obviously,but the teeth array midline have the poor improvement after treatment.Conclusion Marillary protraction is effective to the correction of skeletal class Ⅲ malocclusion and the adjustment of a skeletal class Ⅲ,but the backteeh,the teeth array and midline must be improved by fixed appliance.

关 键 词：骨性Ⅲ类错 快速扩弓 前方牵引 头影测量分析 PAR指数 

分 类 号：R78[医药卫生—口腔医学]