成人RME矫治后长期稳定性的初步探讨  

Long-term stability of Adult Cases Treated by Rapid Maxillary Expansion

作　　者：王林[1] 

机构地区：[1]南京医科大学口腔医学院正畸科,210029

出　　处：《口腔正畸学》2001年第4期158-160,共3页Chinese Journal of Orthodontics

摘　　要：目的　通过对 2 1例成人经上颌快速扩大 (RME)矫治后的牙关系进行了随访观察 ,旨在对成人RME矫治后的长期稳定性进行初步探讨。材料　本研究对象由 2 1例经RME矫治的成人所构成。均经Hass型扩弓器扩弓和方丝弓矫治器联合矫治。在矫治前 (T1 )和矫治结束时 (T2 )分别制取牙石膏模型 ,并戴用Hawley式保持器进行保持。保持器戴用时间最短 1年 ,最长 5年。在停止戴用保持器后至少 1年 (大部分 5年 ) ,制取随访模 (T3)。方法　对 2 1例保持前后 (T2 ,T3)的模型进行以下测量 :1 上颌第一磨牙间宽度 ;2 上颌第二前磨牙间宽度 ;3 上颌第一前磨牙间宽度 ;4 上颌尖牙间宽度 ;5 第一磨牙颊侧牙槽间宽度。对所测量数据用Sigmastate统计软件进行配对t检验。结果　观察所有样本保持前后的模型 ,未见有样本在保持后 ,其后牙咬合关系为反关系。但测量数据的统计结果显示 :除第一磨牙间宽度外其余指标的变化均有统计学意义。结论　成人经RME矫治保持后 ,虽有轻度复发 ,但未见有复发至后牙反的状况 。Objective To evaluate the long term stability of adult cases treated by Rapid Maxillary Expansion(RME). Material 21 adults who had undergone RME with a Hass palatal expansion followed by edgewise appliance therapy. The pre (T 1) and the post treatment(T 2) models were recorded at the beginning of treatment and at the time of retetion following orthodontic treatment respectively. The post retention model(T 3) was taken after retention for a period of 12 months to 5 years.Method The following transarch widths were made on study models:1.First molars; 2.2 nd premolars; 3.First premolars ; 4.Cuspids; 5.First molar alveolus. Results The decrease in transarch widths in subjects out of retention was moderate but statistically significant. None of the subjects relapsed into posterior cross bite. Conclusion The long term stability of palatal expansion in adults with RME was on the whole achieved.

关 键 词：后牙反HE 成人 上颌快速扩大 错HE矫治 

分 类 号：R783.5[医药卫生—口腔医学]