CBCT评价526颗上颌第二磨牙牙根根管形态及其与上颌窦的关系  

Evaluation of root and root canal morphology of 526 maxillary second molars and anatomical relationship with the sinus floor using CBCT

作　　者：张文娟 白希婧 饶潇潇 王伟[1] 尼娜 ZHANG Wenjuan;BAI Xijing;RAO Xiaoxiao;WANG Wei;NI Na(Department of Stomatology,Tianjin Hospital,Tianjin 300299,China)

机构地区：[1]天津市天津医院口腔科,天津300299 [2]天津市口腔医院口腔颌面外科,南开大学医学院,天津300041 [3]南开大学医学院,天津300071

出　　处：《口腔医学》2024年第11期824-830,共7页Stomatology

摘　　要：目的研究上颌第二磨牙(MSM)的牙根、根管系统的解剖学特征以及根尖与上颌窦的关系。方法回顾性分析了263例患者526颗MSM的CBCT成像资料。记录并分析患者的年龄、牙根及根管数量、融合根数量、根管弯曲类型以及牙根与窦底的解剖关系。结果大多数上颌第二磨牙有3个根(59.1%)。三根三管的发生率最高(47.3%)。有192颗(36.5%)的牙齿出现牙根融合。两根两管和三根三管MSM的腭根管在颊舌方向的弯曲度大于近远中向。三根MSM的近中颊根有向上颌窦内延伸的趋势,腭根有远离上颌窦的倾向。MSM牙根到上颌窦底的距离随年龄增长而增加(P<0.05)。结论MSM的牙根和根管形状差异较大。Objective To study anatomical structures of the maxillary second molars(MSM)roots and canals and the relationship between root apices and the maxillary sinus.Methods Cone beam computed tomography imaging data of 526 MSM from 263 patients were evaluated retrospectively.The patient age,number of roots and canals,number of fused roots,type of root canal curvature,and anatomical relationship to the sinus floor were all documented and analyzed.Results It was found that the majority of MSM had three roots(59.1%),and the incidence of three root canals with three roots was the highest(47.3%).Fused roots were found in 192(36.5%)of the teeth examined.Palatal root canals of two⁃root,two⁃canal,and three⁃root,three⁃canal teeth had more curvature in the buccolingual direction than in the mesiodistal direction.The mesial buccal roots of MSM with three roots tended to extend into the maxillary sinus and the palatine roots of the three⁃rooted MSM tended to separate from the maxillary sinus.The distance between MSM and the sinus floor increased with age(P<0.05).Conclusion The root and canal shape of MSM varies widely among a sample of individuals.

关 键 词：锥形束计算机断层扫描 融合牙 根管弯曲度 上颌第二磨牙 上颌窦 

分 类 号：R816.98[医药卫生—放射医学]