上颌第一前磨牙牙根数目和根管形态的研究  

Root form and canal morphology of maxillary first premolars

作　　者：张栋华[1] 吴大明[1] 吴友农[1] 葛兵[1] 

机构地区：[1]南京医科大学附属口腔医院口腔颌面外科,口腔医学研究所,江苏南京210029

出　　处：《南京医科大学学报（自然科学版）》2011年第2期213-215,234,共4页Journal of Nanjing Medical University(Natural Sciences)

基　　金：南京医科大学科技发展基金(06NMUM039)

摘　　要：目的:研究上颌第一前磨牙的牙根数目和根管形态。方法:制备上颌第一前磨牙的透明牙标本,记录牙根数目,并在牙科手术显微镜下观察其根管形态。结果:共获得268个透明牙标本,其中单根牙201个(75.00%)、双根牙62个(23.13%)、三根牙5个(1.87%)。单根管、双根管和三根管的发生率分别为3.06%、83.58%和1.87%,其他类型根管发生率为1.49%。侧支根管发生率为25.00%,根尖孔大多位于牙根的侧方。结论:上颌第一前磨牙的形态从多到少依次是单根双根管、双根双根管、单根单根管和其他。Objective： To investigate the root form and canal morphology of maxillary first premolars.Methods：The cleared teeth were used.The number of the roots was recorded,and the root canal morphology of the cleared teeth was examined under a dental operating microscope.Results：Total 268 cleared teeth were examined.There were 201 teeth（75.00%） with one root,62 teeth（23.13%） with two roots,and 5 teeth（1.87%） of the samples with three roots.The percentage of one canal,two canals and three canals were 3.06%,83.58% and 1.87%,respectively.Only 1.49% of the total samples demonstrated other types.The percentage of lateral canals was 25.00%,and the apical foramina were mainly localized laterally.Conclusion：The root canal morphology of maxillary first premolars from high to low incidence was one root with two canals,two roots with two canals,one root with one canal,and others.

关 键 词：上颌第一前磨牙 牙根 根管形态 

分 类 号：R781[医药卫生—口腔医学]