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论文摘要

不同垂直骨面型个别正常下颌骨形态及牙列特征研究

Characteristics of mandible and mandibular dentition in patients with near-normal occlusion and different vertical facial skeletal types

作者:涂景秋, 樊佳倩, 雷勇华

Author:Jingqiu Tu, Jiaqian Fan, Yonghua Lei

收稿日期:2017-02-10          年卷(期)页码:2017,35(4):403-403-407

期刊名称:华西口腔医学杂志

Journal Name:West China Journal of Stomatology

关键字:垂直骨面型,个别正常,下颌骨,下牙列,三维测量,锥形束CT,

Key words:vertical facial skeletal type,individual-normal occlusion,mandible,mandibular dentition,three-dimen-sional measurement,cone beam computed tomography,

基金项目:中南大学自由探索计划项目(zy2016725)

中文摘要

目的 比较不同垂直骨面型个别正常牙合的差异,为临床上不同垂直骨面型人群正畸治疗目标的确定提供指导。方法 采集30例个别正常牙合成人为研究对象,根据下颌平面角FH/MP的大小分为高角组(8例)、均角组(12例)和低角组(10例)。使用DICOM数据导入Invivo5软件测量∠L1/MP、∠L6/MP、L6牙长轴交角、牙合平面角、Balkwill角、Bonwill三角高与底之比。结果 高角组和均角组∠L6/MP小于低角组,牙合平面角大于低角组,差异具有统计学意义(P<0.05);其余测量项目组间差异均无统计学意义(P>0.05)。结论 高角组、均角组个别正常牙合人群牙合平面较低角组前倾,下颌第一磨牙牙长轴在近远中方向上较低角组直立,而高角组与均角组之间无明显差异。在正畸治疗中,与高角及均角患者相比,低角患者的牙合平面相对于眼耳平面位置更接近水平,下颌磨牙位置相对于下颌平面更向近中倾斜。

英文摘要

ObjectiveThe aim of our work is to characterize individual normal occlusions to establish appropriate treat-ment standards for different vertical facial types.MethodsA total of 30 patients with near-normal occlusion were grouped into high-angle group (eight cases), medium-angle group (12 cases), and low-angle group (10 cases) according to vertical facial skeletal type. Invivo5 software was used and digital imaging and communications in medicine data were rebuilt to measure the ∠L1/MP, ∠L6/MP, axis corner of L6, cant of occlusion plane, Balkwill angle, and Bonwill triangle of each group.ResultsAmong the groups, the low-angle group had the smallest ∠L6/MP (P<0 .05) and largest cant of occlusion. no significant difference was observed among the three groups with regard to the other parameters (P>0.05).ConclusionPatients with low-angle vertical facial skeletal type requires a modified treatment standard. In this group, the treatment standard must ensure that the cant of occlusion plane is more parallel to the Frankfurt horizontal plane compared with those of the other groups, and the axis of L6 is tilted distally relative to the mandibular plane.

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