[摘要]目的:通過X線頭影測量探討方絲弓技術拔牙矯治恒牙期骨性安氏II類1分類錯牙合的臨床療效。方法:對10名前牙深覆蓋達到8~11mm且ANB平均為7.4°伴Ⅲ°深覆牙合的恒牙期患者,采用方絲弓技術進行矯治,均拔除4個第一雙尖牙,并對所有患者正畸治療前后進行頭影測量分析。結果:10例患者治療后覆蓋、覆牙合均達到正常, NA-PA平均減少4.4°,ANB減小2.3°,SNA減小1.9°。下頜Spee氏曲線與上頜補償曲線明顯整平。結論:應用方絲弓矯治技術拔牙治療方法可以有效矯治恒牙期骨性安氏II類1分類錯牙合,其改善的關鍵在于上切牙內收前深覆牙合的矯治。
[關鍵詞]骨性安氏II類1分類;深覆牙合;方絲弓技術
[中圖分類號]R783.5[文獻標識碼]A [文章編號]1008-6455(2007)11-1554-03
Extraction treatment of skeletal Class II division I malocclusion
MA Yu-xia,GUO Wei,LIU Ya-jun
(Department of Stomatology,Navy General Hospital,Beijing 100037,China)
Abstract:ObjectiveTo investigate the effects of Edgewise technique with extraction treatmentin skeletal Class II division I malocclusion of permanent dentition. MethodsTen skeletal Class II division I malocclusion patients in permanent dentition with ANB 7.4° and overjet 8-11mm were treated by Edgewise technique with extract 4 first bicuspids, cephalometric measurements before and after treatment were done. ResultsAfter treatment, overjet and overbite of all patients were corrected to normal range.SNA,ANB,UI-NA,NA-PA were reduced by 1.9°(P<0.05),2.3°(P<0.01),3.3mm(P<0.01),4.4°(P<0.05)respectively,Conclusion Skeletal Class II division I malocclusion in permanent dentition can be treated successfully by Edgewise technique with extraction 4 bicuspids
Key words:skeletal classII1 division malocclusion;edgewise technique;extraction treatment;deep overbite
骨性安氏II類1分類是一種常見的嚴重錯牙合畸形,成因復雜,伴隨上下頜骨、牙列關系的異常,往往影響患者容貌及心理健康。隨著人們對容貌的日益重視以及對手術的畏懼心理,越來越多的該類患者尋求采用正畸的方法進行矯治,其矯治方法也得到廣泛深入的探討[1-5]。不過有學者尖銳地指出,“在正畸美學研究中,只注重牙列的矯正和咬合關系的調整,但怎樣通過正畸治療手段改善容貌等,則很少涉及”[6]。越來越多的學者認識到,在正畸治療中,面部美觀與咬合是同樣重要的治療目標[7]。我們在臨床實踐中,遇到許多不愿意做手術的骨性安氏II類1分類患者,他們對容貌的改善比一般的錯牙合患者有更高的期待,正畸治療在改善他們牙列的同時,對他們的容貌能有多大的影響呢?……