安氏Ⅱ~1与安氏Ⅱ~2错牙冠宽度与Bolton指数的对比研究  

Comparison of the tooth width and Bolton index between Angle class Ⅱ~1 and Ⅱ~2 malocclusion

作　　者：马宁[1] 汤玉真 

机构地区：[1]北京大学第三医院口腔科,100191 [2]内蒙古赤峰市宁城县中盟医院口腔科

出　　处：《实用口腔医学杂志》2011年第1期99-102,共4页Journal of Practical Stomatology

摘　　要：目的:通过比较安氏Ⅱ1与安氏Ⅱ2错上下颌牙冠宽度和Bolton指数,探讨两类错在牙特征上的差异。方法:以安氏Ⅱ1错54例,安氏Ⅱ2错35例为研究对象,分别对其模型进行牙冠宽度测量并计算Bolton指数。比较两类错的牙冠宽度、Bolton指数的大小以及Bolton指数不调的分布率。结果:①两类错患者的Bolton指数均无显著的性别差异(P>0.05)。②两类错间男性患者的牙冠宽度未表现出统计学差异(P>0.05),而女性患者安氏Ⅱ1错其上颌中切牙、侧切牙、尖牙、第一磨牙,下颌中切牙、尖牙的牙冠宽度显著大于安氏Ⅱ2错,差异有统计学意义(P<0.05)。③两类错间Bolton指数比值及Bolton指数不调率未表现出统计学差异(P>0.05)。结论:女性患者牙冠宽度间的显著差异为两类错在牙特征上较为明显的差异之一,在治疗时应该加以重视。Objective：To compare the tooth width and Bolton index between Angle class Ⅱ1 and Ⅱ2 malocclusion.Methods：54 casts of Class Ⅱ1 malocclusion and 35 of Class Ⅱ2 were selected.Mesiodistal width of the teeth were measured and Bolton index was calculated.The tooth width,and the Bolton index and the incidence of abnormal Bolton index were compared.Results：1.There was no sexual difference of the Bolton index in the two classes of malocclusion（P0.05）.2.There was no significant difference of the tooth width in the males between the two classes of malocclusion（P0.05）.But in the females,the tooth width of the maxillary central incisor,lateral incisor,canine,the first molar and the mandibular central incisor and canine in the class Ⅱ1 were significantly larger than in class Ⅱ2（P0.05）.3.There was no significant difference of the Bolton index and the incidence of abnormal Bolton index between the two classes（P0.05）.Conclusion：The significant difference of the tooth width in the females between class Ⅱ1 and class Ⅱ2 is one of the differences of the teeth and occlusion between the two classes of malocclusion.

关 键 词：安氏Ⅱ^1错[牙合] 安氏Ⅱ^2错[牙合] 牙冠宽度 BOLTON指数 

分 类 号：R783.5[医药卫生—口腔医学]