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目的 建立中国人正常牙弓形态的平均值及其变异范围并分析其特点。方法 从成都高校在校大学生中选取年龄为 18～ 2 3岁的 78名正常人 ,灌制上、下颌石膏模型 ,在临床牙冠中心点连线的基础上 ,分别测量上、下颌牙弓的深度和宽度。结果 本研究确立了以临床牙冠中心点为参考点的中国人正常尖牙、前磨牙及磨牙的宽度和深度的正常范围 ,并绘出其原大弓形图 ;发现尖牙宽度与第一磨牙宽度 ,第一前磨牙宽度与第一磨牙宽度 ,尖牙深度与第一磨牙深度 ,第一前磨牙深度与第一磨牙深度呈显著性相关。结论 中国人正常的牙弓形态略显尖圆 ,尖牙段相对窄而磨牙段相对宽。提示在正畸临床工作中弯制直丝弓形时 ,应重视尖牙、第一前磨牙与第一磨牙的宽度和深度的匹配性
Objective To establish the average value of Chinese dental arch morphology and its variation range and analyze its characteristics. Methods From the college students in Chengdu, 78 normal people aged 18 ~ 23 years old were selected to model the upper and lower jaw gypsum models. Based on the connection of the central points of the clinical crowns, the mandibular arch Depth and width. Results The study established the normal range of the width and depth of normal ridges, premolar and molars with the clinical center of the crown as the reference point and plotted the original arch map. The molar width, the first premolar width and the first molar width, the canine depth and the first molar depth, the first premolar depth and the first molar depth were significantly correlated. Conclusions The shape of the arch of Chinese normal jaws is slightly sharp, the canine segments are relatively narrow and the molar segments are relatively wide. Prompt clinical work in the orthodontic bending straight arch, we should pay attention to fangs, the first premolars and first molar width and depth of the match