下颌管分支的锥形束CT影像学分析

目的 运用锥形束CT（CBCT）分析下颌管分支发生的概率及其类型。方法 选取拍摄CBCT影像的216例（女104 例，男112例）患者为研究对象，对CBCT的下颌管分支影像进行观测并进行分类。结果 216例（432侧）患者中，39例（18.06%）50侧（11.57%）观测到下颌管分支，其中女18例（17.31%），男21例（18.75%）。下颌管分支分为4类，第Ⅰ类17侧（3.94%），第Ⅱ类11侧（2.55%），第Ⅲ类20侧（4.63%），第Ⅳ类2侧（0.46%）。结论 CBCT对下颌管分支的检出率较高，口腔颌面外科医生在进行下颌手术时应注意下颌管分支这一解剖变异。

Analysis of bifid mandibular canal via cone beam computed tomography

Objective The purpose of this study is to analyze the incidence and the type of the bifid mandibular canal (BMC) by using cone beam computed tomography (CBCT) images. Methods A total of 216 patients (104 female and 112 male) who underwent CBCT were included in this study. The CBCT images were evaluated for the incidence and the type of the BMC. Results BMC was observed in 39 (18.06%) of 216 patients and 50 (11.57%) of 432 sides, female 18 (17.31 %) and male 21 (18.75%). BMC were classified into four types: type Ⅰ 17 sides (3.94%), type Ⅱ 11 sides (2.55%), type Ⅲ 20 sides (4.63%), and type Ⅳ 2 sides (0.46%). Conclusion BMC is detected at a high rate by using CBCT. When doctors perform surgical procedures in the mandible, they should pay attention to the anatomical variations of BMC of the mandibular canals.