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.
出处
《南京医科大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
关键词
上颌第一前磨牙
牙根
根管形态
maxillary first premolar tooth root root canal morphology
