下颌前牙根管变异的锥形束CT研究

来源 :中华口腔医学会牙体牙髓病学专业委员会第五次全国牙体牙髓病学临床学术研讨会 | 被引量 : 0次 | 上传用户:gzhguozhihong
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  目的:运用锥形束CT研究下颌前牙的根管变异情况.方法:收集1024例患者的5660颗下颌前牙的CBCT资料,运用配套软件对牙齿的冠状面、矢状面以及横断面进行影像学分析,统计和分析牙根数目、根管数目、根管类型、对称性分布等.结果:下颌中切牙均为单根牙,双根下颌侧切牙检出2例,发生率为0.11%,双根下颌尖牙检出22例,发生率为1.16%.下颌中切牙、侧切牙、尖牙双根管发生率分别为20.23%、33.95%、5.98%.下颌前牙根管数呈现出明显的对称性,其中尖牙对称性发生率最高,为97.05%,中切牙次之,为94.33%,侧切牙最低,也达92.97%.按照Vertucci根管分型,本次研究共观察到除Ⅳ型、Ⅵ型和Ⅷ型外的5种根管类型,以及1种2-1-2-1型根管.其中以Ⅰ型为主,为79.90%,其次为Ⅲ型,为17.44%.结论:下颌前牙根管系统复杂多变,其中下颌侧切牙双根管发生率最高,双根管以Vertucci Ⅲ型为主,锥形束CT是诊断根管变异的有效手段.
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