摘要
目的:探讨恒牙列早期安氏类1分类错患者矫治前拔牙与否的形态学影响因素。方法:对临床获得满意疗效的81例恒牙列早期安氏类1分类错患者,其中39例未拔牙,42例拔除4个双尖牙,采用华西医科大学X线头影测量综合分析法和牙颌模型分析法进行回顾性比较研究。结果:拔牙组表现为下颌平面角(FMA)、下切牙交角(FMIA)较大,下面高较大,上切牙更前倾,牙列拥挤量和下颌矢状曲线曲度较大,与未拔牙组比较差异有显著性;而上下颌骨的矢状不调程度及颜面软组织外形,拔牙组和未拔牙组无显著性差异。结论:Tweed三角的稳定协调程度、牙列拥挤度。
Objective: To compare the dentofacial characteristics of persons with Class Ⅱ, Division 1 malocclusion treated with either an extraction or a nonextraction approach. Such comparison might help identify which parameters influence the extraction decision. Methods: Lateral cephalograms were available on 81 cases of Class Ⅱ, Division 1 malocclusion, 42 were treated with 4 premolar extractions and 39 were treated with non extraction. The cephalometric analysis of West China University of Medical Sciences and Model Analysis were used, Results: Patients in the extraction group had larger FMA, FMIA and lower anterior facial height. In the group of extraction, the upper anterior teeth tipped more anteriorly, and the tooth size arch length discrepancy and the depth of Spee curve were greater significantly. But the sagital discrepancy and soft tissue's profiles had no significant difference between two groups. Conclusion: The stability of the triangle of Tweed, the tooth size arch discrepancy and the depth of Spee curve were the keys to decide weather extraction or not.\;
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
1999年第4期341-343,共3页
West China Journal of Stomatology
关键词
拔牙
错HE
矫治术
形态学
extraction\ \ nonextraction\ \ Class Ⅱ, Division 1 malocclusion
