Objective The aim of our work is to characterize individual normal occlusions to establish appropriate treat-ment standards for different vertical facial types. Methods A 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. Results Among 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). Conclusion Patients 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.%目的 比较不同垂直骨面型个别正常的差异,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.
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