摘要目的 通过锥形束CT对下颌骨后牙区颌骨形态进行分类,为临床制定下颌骨后牙区的种植手术提供参考.方法 纳入2015年11月至2018年3月于福建医科大学附属协和医院口腔科就诊的患者208例,通过CS 3D imaging V3软件进行三维分析,记录前磨牙、磨牙位点的颌骨轴断面类型,分为A型(垂直型)、B型(倾斜型)、C型(舌侧倒凹型)和D型(吸收严重型)并分析.结果 共纳入1 664颗前磨牙、磨牙位点的颌骨类型,前磨牙区主要为A型(79%～96%),磨牙区以B型(36%～37%)、C型(30%～54%)为主,其次是D型(2%～5%).不同的牙位(P<0.001)、是否有牙缺失(P<0.001)、左右侧(P=0.013)、不同年龄(P<0.001)、不同性别(P=0.007)的下颌骨的形态构成比较中差异均有统计学意义.结论 对下颌骨后牙区颊舌侧骨形态分类,根据分类设计种植的方向及术式,为制定下颌骨后牙区的种植手术提供参考.

abstractsObjective To classify the morphology of mandible posterior region and provide reference for the planning of dental implantation. Methods Cone beam CT data of 208 patients were collected. The CT data were imported into CS 3D imaging V3 software and then the morphology of mandible posterior region were analyzed. The types of premolar and molar mandible cross-section morphology were recorded, classified and analyzed. Results The results showed that type A (vertical type) (79%-96%) was the most common in the premolars,whereas type B (inclined type) (36%-37%) and type C (lingual inverted concave) (30%-54%) were the most common types in the molars,followed type D (absorption severe type) (2%-5%). There was a statistically significant differences in tooth positions (P<0.001), tooth deficiency aspect (P<0.001) and different side (P=0.013), different age (P<0.001), and different gender (P=0.007). Conclusions Using cone beam CT to determine the morphology of mandible may be a reference for the planning of dental implantation.