颌间牙量的协调性常用Bolton’s分析法来预测,主要根据上下牙齿的宽度分析上下牙弓是否协调。然而,牙齿的厚度不同对牙齿排列影响较大,使得Bolton’s分析法不尽准确。本文选取44例正畸完成病历模型,其选择标准为:一类尖牙关系;上下颌前牙咬合正常;覆(牙合)2.5mm;无倾斜和扭转。测量每一个前牙 The coordination of intermaxillary teeth is commonly used Bolton's analysis to predict, mainly based on the width of the upper and lower teeth analysis of the upper and lower dental arch is coordinated. However, different tooth thicknesses have a greater effect on tooth alignment, making Bolton's analysis less accurate. In this paper, 44 cases of orthodontic completed medical records model, the selection criteria are: a class of canine relationship; maxillary mandibular anastomosis normal; occlusal 2.5mm; no tilt and torsion. Measure each front tooth