离体的上颌第一前磨牙的根管和牙根情况的研究  

Morphology of roots and canals in maxillary first premolars

作　　者：崔恺[1] 汪平[2] 张明礼 袁渝萍[2] 范继红[2] 王宇[2] 

机构地区：[1]四川夹江解放军第42医院口腔科,614100 [2]西安第四军医大学口腔医学院

出　　处：《实用口腔医学杂志》2005年第1期121-123,共3页Journal of Practical Stomatology

摘　　要：目的 :观察上颌第一前磨牙的牙根及根管形态。方法 :115个离体的上颌第一前磨牙 ,对牙齿进行近远中向X线照像 ,然后从根中 1/3横断 ,按Vertucci :分类法对根管系统进行记录。结果 :74个牙是单根 (64 % ) ,41个牙是双根 (3 6% ) ,双根牙根管均是Ⅰ型 (1) ,即每个牙均是 2个根管 ,每个根 1个根管 ,而 3 9%的单根牙是 1个根管 ,61%的单根牙有 2个根管 [Ⅱ型 (2 1) ,Ⅳ型 (2 ) ,Ⅴ型 (1 2 ) ]。结论 :上颌第一前磨牙的根管类型相对复杂。Objective: To investigate the roots and canals morphology o f extracted maxillary first premolars. Methods: The root morphol ogy and the root canals of 115 extracted maxillary first premolars were visualiz ed on radiographs taken in the mesio-distal direction, then the teeth were cut transversely and root sections were examined, the root canal systems was analyse d with Vertucci’s classification. Results: 74(64%) teeth were w ith one root, 41(36%) with two roots, all teeth with two roots had two canals a nd each canal with one apical foramen,〔TypeⅠ(1)〕.39% of the single-root teet h demonstrated one canal, whereas 61% of the single-root teeth had two canals, 〔TypeⅡ(2-1), TypeⅣ(2) and TypeⅤ(1-2)〕.Conclusions: The roots of maxillary first premolars possesses a variety of canal system types.

关 键 词：牙齿解剖 前磨牙的形态 牙髓腔 

分 类 号：R780.05[医药卫生—口腔医学]