934颗上颌中切牙牙根位置锥形束CT解剖分型初探  

Classification of the anatomical structures of maxillary central incisor root by cone-beam CT

作　　者：王朝 周磊 徐多玲 徐淑兰 

机构地区：[1]南方医科大学口腔医院种植中心,广州510280 [2]南方医科大学口腔医院口腔科,广州510280

出　　处：《中华口腔医学杂志》2017年第11期656-660,共5页Chinese Journal of Stomatology

摘　　要：目的 通过锥形束CT分析上颌中切牙牙根位置、唇腭侧骨壁厚度及性别差异,为即刻种植手术提供参考.方法 收集2009年1月至2014年12月于南方医科大学口腔医院种植中心就诊、需行锥行束CT检查的934例患者934颗上颌中切牙的锥形束CT数据,根据牙根在牙槽骨内矢状位置分为偏唇类、中间类、偏腭类.再将偏唇类进一步细分为Ⅰ、Ⅱ、Ⅲ3个亚类,测量釉质牙骨质界根方4 mm、根中处、根尖处的唇腭侧骨壁厚度.结果 上颌中切牙牙根偏唇类占95.4%（891/934）.偏唇类中Ⅰ亚类占47.5%（423/891）,Ⅱ亚类占44.2%（394/891）,Ⅲ亚类占8.3%（74/891）.在釉质牙骨质界根方4 mm和根中处,Ⅲ亚类唇侧骨壁最大（分别为0.86和0.95 mm）;Ⅱ亚类腭侧骨壁最大（分别为1.65和2.37 mm）.根尖处Ⅰ亚类唇侧骨壁最大（1.89 mm）,Ⅲ亚类腭侧骨壁最大（7.83 mm）.结论 本组研究对象大部分上颌中切牙牙根偏唇侧,其中约一半患者唇侧骨壁较充足,适合行即刻种植.Objective To examine the root position of the maxillary central incisors and to provide clinical reference before the immediate implant placement. Methods Cone-beam CT （CBCT） data of the maxillary central incisors of 934 patients （934 incisors） was selected and the root position classsified. The sagittal root position in the alveolar bone was classified as buccal, middle, or palatal. The buccally positoined type was further classified into three subtypes of Ⅰ,Ⅱ, andⅢ. Results Most of the maxillary incisor root （95.4%[891/934]） was positioned buccally. Among the buccal-type incisors, the subtypesⅠ,Ⅱand Ⅲ accounted for 47.5% （423/891）, 44.2% （394/891）, and 8.3% （74/891）. In the 4 mm apical to the cemento-enamel junction and the middle of the root, the thickest buccal bone wall was 0.86 and 0.95 mm, the thickest palatal bone wall was 1.65 and 2.37 mm. In the apical location, the thickest buccal bone wall was 1.89 mm, the thickest palatal bone wall was 7.83 mm. Conclusions Most of the maxillary central incisors studied are positioned buccally, and half of these patients have adequate buccal bone and are suitable for immediate implant placement.

关 键 词：锥束计算机体层摄影术 切牙 牙根 牙槽窝 

分 类 号：R782.1[医药卫生—口腔医学]