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论文摘要

上颌前牙倾斜角度对种植治疗设计的影响

The influence of angulation of maxillary anterior teeth on treatment design of dental implants

作者:刘金,蒲必双,夏玉兰,王成泽,王罡,兰晶

Author:Liu Jin, Pu Bishuang, Xia Yulan, Wang Chengze, Wang Gang, Lan Jing

收稿日期:2016-05-05          年卷(期)页码:2016,34(6):611-611-616

期刊名称:华西口腔医学杂志

Journal Name:West China Journal of Stomatology

关键字:锥形束CT,牙体长轴,牙槽骨长轴,美学区,牙种植,

Key words:cone beam computed tomography,the long axis of tooth,the long axis of alveolar bone,esthetic zone,dental implant,

基金项目:

中文摘要

目的 利用锥形束CT(CBCT)研究上颌前牙与牙槽骨的相对位置关系。方法 选取上颌恒牙牙列完整的患者150例(年龄19~48岁,男性和女性各75例),按性别和牙位分为6个组。以牙槽骨长轴为基准,在CBCT影像上测量上颌前牙牙体长轴的相对倾斜角度(偏向腭侧为正,偏向唇侧为负)。使用SPSS 19.0软件对数据进行统计分析。结果 所有研究对象的上颌前牙的牙体长轴均偏向牙槽骨长轴的腭侧。男性上颌中切牙、侧切牙、尖牙的牙体长轴与牙槽骨长轴所成角度α的平均值分别为16.22°(2.50°~28.80°)、17.50°(3.80°~29.50°)、16.27°(1.00°~31.50°),而女性的相应测量结果平均值分别为15.20°(2.20°~27.20°)、15.99°(4.10°~33.30°)、15.01°(3.50°~27.40°)。结论上颌前牙与牙槽骨的倾斜方向不一致,所有上颌前牙牙体长轴均偏向于牙槽骨长轴腭侧。通过CBCT观察上颌前牙与牙槽骨的位置关系,可以指导种植时机,种植体植入位置以及骨增量方案的选择。

英文摘要

Objective This study aims to analyze the angulation of the maxillary anterior teeth relative to the alveolus to provide reference data for clinicians on the best conditions for implant placement in the esthetic zone. Methods Numerous cone beam computed tomography (CBCT) images were reviewed and screened. A total of 150 maxillary images were selected by strict adherence to the defined inclusive criteria, with 75 images each from male and female patients (between the ages of 19 and 48 years at the time of CBCT scan). The maxillary anterior teeth were gathered into the following three groups for males and females: upper canines, upper lateral incisors, and upper central incisors. Then, the long axis of each qualified tooth and its corresponding alveolar process were drawn, and the angles formed by these structures were measured. The resultant data were analyzed by SPSS 19.0. Results The long axis of the maxillary anterior teeth all inclined to the palatal side of the alveolar process. The internal angle (α) formed by the long axis of the maxillary central incisors and the long axis of the alveolar bone presented a mean value of 16.22° (range:2.50°-28.80°) for male subjects and 15.20° (range:2.20°-27.20°) for female subjects. The internal angle (α) of the maxillary lateral incisors exhibited a mean value of 17.50° (range:3.80°-29.50°) for male subjects and 15.99° (range:4.10°-33.30°) for female subjects. Finally, the internal angle (α) of the maxillary canines presented a mean value of 16.27° (range:1.00°-31.50°) for male subjects and 15.01° (range:3.50°-27.40°) for female subjects. Conclusion The long axis of the maxillary anterior teeth all inclined to the palatal side of the alveolar process. For implant placement, careful preoperative analysis and evaluation with CBCT may be beneficial for avoiding the risk factors and achieving a high probability of success in the esthetic region.

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