骨性Ⅲ类错患者牙弓形态特征分析  

The characteristics of the arch form of skeletal Class Ⅲ malocclusion

作　　者：孙留振[1] 范向飞[2] 肖丹娜[2] 高辉[2] 

机构地区：[1]天津医科大学研究生院,天津300070 [2]天津市口腔医院正畸科,天津300041

出　　处：《华西口腔医学杂志》2012年第3期275-277,共3页West China Journal of Stomatology

摘　　要：目的探讨骨性Ⅲ类错患者的牙弓形态特征,为临床诊断和治疗提供理论依据。方法选择骨性Ⅲ类错患者47例为实验组,个别正常50例为对照组,在石膏模型上测量与牙弓形态特征相关的7个项目,计算上下颌相应测量项目之差,采用SPSS 17.0软件对数据进行独立样本t检验。结果实验组的上颌牙弓前段长度小于对照组,上颌尖牙角大于对照组(P<0.05);男性实验组的上下颌第一前磨牙间宽度之差大于对照组,牙弓前段长度之差小于对照组(P<0.05)。结论骨性Ⅲ类错患者的牙弓宽度基本正常,但牙弓前段长度不足,且前段弓形较为平直。Objective To study the characteristics of the arch form of skeletal Class Ⅲ malocclusion and provide references for diagnosis and treatment plan.Methods 7 indexes in dental casts of 47 patients with skeletal Class Ⅲ malocclusion and 50 individuals with normal occlusion were measured respectively.And differences between corres-ponding upper and lower measurements were calculated.Independent samples t-test was employed for comparing bet-ween the two groups by SPSS 17.0.Results Compared with normal occlusion sample,Class Ⅲ malocclusion group had smaller anterior segment lengths and larger canine angles（P0.05）.Differences between upper and lower first premolar widths were larger in males with skeletal Class Ⅲ malocclusion.And differences between upper and lower an-terior segment lengths were smaller in males with skeletal Class Ⅲ malocclusion（P0.05）.Conclusion Arch widths of patients with skeletal Class Ⅲ malocclusion are basically normal.The lengths of anterior segment are smaller and the anterior arch forms are straighter.

关 键 词：牙弓形态 骨性错[牙合]牙弓宽度 牙弓长度 

分 类 号：R783.5[医药卫生—口腔医学]