健康成人下颌切牙管的锥形束CT测量分析  

Morphology study of mandibular incisive canal in adults based on cone-beam computed tomography

作　　者：孔娜娜[1,2] 袁华[1] 苗芬[1] 谢理哲[1] 朱龙彪[1] 陈宁[1] 

机构地区：[1]南京医科大学口腔医学研究所南京医科大学附属口腔医院口腔颌面外科,210029 [2]浙江大学医学院附属儿童医院口腔科,杭州310003

出　　处：《中华口腔医学杂志》2015年第2期69-73,共5页Chinese Journal of Stomatology

基　　金：国家自然科学基金（81271109）;江苏高校优势学科建设工程项目（JX10531802/002）

摘　　要：目的 利用锥形束CT测量下颌切牙管（mandibular incisive canal,MIC）,了解其形态和特点,为临床提供参考.方法 观察2011年1月至2013年1月50名成人健康志愿者的锥形束CT图像,测量分析MIC的检出率、管径、长度及其与颌骨的关系.结果 在50例（100侧）锥形束CT图像中：MIC的检出率为100％（100/100）,清晰率为71％（71/100）;MIC的管径面积（唇舌径×垂直径）从起点至终点逐渐变小（左侧起点2.17 mm× 2.22 mm,终点0.82 mm× 0.92 mm;右侧起点2.14 mm×2.08 mm,终点0.87 mm×0.86 mm）;MIC左右侧平均长度分别为17.84和17.73 mm;MIC在下颌骨唇舌向偏唇侧;在垂直方向MIC距下颌骨下缘较近,MIC到根尖的距离在尖牙最小.结论 锥形束CT对MIC有良好的检出率和清晰率;MIC在下颌骨的走行中偏向唇侧和下颌骨下缘.Objective To investigate the mandibular incisive canal （MIC）with cone-beam computed tomography （CBCT）.Methods Fifty adults were selected and CBCT was taken.The CBCT data were reconstructed to evaluate the visibility,shape,diameter,length of the MIC and its relationship with mandible.Results MIC could be identified in 100%（100/100） of CBCT with good clarity in 71% （71/100）.The diameters （horizontal diameter versus vertical diameter） of MIC became smaller from origin to end （left origin of MIC was 2.17 mm×2.22 mm,left end was 0.82 mm×0.92 mm;right origin of MIC was 2.14 mm× 2.08 mm,right end was 0.87 mm×0.86 mm）.The left and right mean length of MIC was 17.84 mm and 17.73 mm respectively.In bucca-lingual direction,MIC was close to buccal cortical border,and in vertical direction,MIC was close to lower margin of mandible.The distance from MIC to apex of root was shortest in canine.Conclusions CBCT can identify MIC with high visibility and prominent clarity.In the interforaminal region of mandible,MIC was close to buccal and lower margin of mandible.

关 键 词：下颌骨 下颌切牙管 锥束计算机体层摄影术 

分 类 号：R816.98[医药卫生—放射医学]