运用3D数字模型观察前牙区牙齿大小的特征

发布时间：2018-08-25 10:40

【摘要】：目的运用3D数字模型观察前牙区牙齿大小的特征。方法选取汉族(蒙古人种)青少年正畸患者66例,其中男32例,女34例,11~14岁,平均12.8岁。制取上下牙牙合印模,通过电子扫描技术获得3D数字模型,对上下前牙区牙齿临床冠的高度、宽度和厚度进行测量,观察大小变化规律及其对正畸治疗效果的影响。结果正畸患者前牙Bolton指数略大于高加索人种均值(P0.05);上颌侧切牙和下颌中切牙对前牙区Bolton指数的变化影响最大;上颌侧切牙舌侧边缘嵴厚度变化最大;同名上颌侧切牙和下颌中切牙临床冠宽度有一定差异;同名上颌尖牙及下颌尖牙临床冠高度有一定差异。结论前牙区牙齿大小有一定变化规律,Bolton指数在不同人种间有一定差异,影响前牙美学及良好咬合关系的建立,从而对正畸疗效稳定产生作用。
[Abstract]:Objective to observe the size of anterior teeth by using 3D digital model. Methods 66 adolescent orthodontic patients (32 males and 34 females) of Han nationality (Mongolian) were selected, with an average age of 12.8 years (1114 years). The upper and lower teeth occlusion impression was made and 3D digital model was obtained by electronic scanning technique. The height, width and thickness of the clinical crown of the upper and lower anterior teeth were measured, and the changes of the size and the effect on orthodontic treatment were observed. Results the Bolton index of anterior teeth in orthodontic patients was slightly higher than that of Caucasian people (P0.05), the changes of Bolton index in maxillary lateral incisor and mandibular central incisor were the most significant, and the thickness of lingual marginal ridge in maxillary lateral incisor was the greatest. The clinical crown width of maxillary lateral incisor and mandibular central incisor was different, and the clinical crown height of maxillary canine and mandibular canine was different. Conclusion there is a certain variation of tooth size in anterior teeth. Bolton index is different among different ethnic groups, which affects the aesthetics of anterior teeth and the establishment of good occlusal relationship, and thus has a stable effect on orthodontic treatment.
【作者单位】：山东大学口腔医院正畸科;山东省口腔生物医学重点实验室;
【分类号】：R783.5

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