摘要
目的:采用锥形束CT(CBCT)探讨双侧下颌第一前磨牙根管的解剖形态。方法:选取97例双侧下颌第一前磨牙的CBCT扫描数据,使用NNT软件分析下颌第一前磨牙的根管数目、形态、根面沟、根管分叉和双侧根管对称性。结果:下颌第一前磨牙根管Vertucci分类,发生率分别为Ⅰ型83.5%,Ⅲ型3.6%,Ⅴ型8.8%,C形4.1%。多根管类型的根面沟发生率为75%,明显高于单根管的3.7%,并且56.3%、31.3%的多根管类型分别在根中1/3、根尖1/3分叉。93.8%的下颌第一前磨牙根管双侧对称,其中,单根管对称率为95.2%,高于多根管的66.7%。结论:下颌第一前磨牙根管解剖结构复杂,CBCT可为根管系统提供准确的依据。
PURPUSE： To investigate the canal morphology of bilateral mandibular first premolar using cone-beam CT（CBCT）.METHODS： Ninety-seven CBCT images of bilateral mandibular first premolar were selected.The images were analyzed with NNT software for the number and morphology of canal,groove,position of bifurcation and symmetry of bilateral canal classification.RESULTS： The canal configuration of mandibular first premolar was typeⅠ：83.5%,type Ⅲ：3.6%,typeⅤ：8.8% and C-shaped canal：4.1% by Vertucci＇s classification.The incidence of groove in complicated canal（75%）was obviously higher than single canal（3.7%）.56.3% of complicated canal bifurcated in middle third,and 31.3% in apical third.93.8% of mandibular first premolar had bilateral canal symmetry,the symmetry rate of single canal（95.2%） was higher than complicated canal（66.7%）.CONCLUSIONS： CBCT can provide accurate information of canal system,the canal anatomy of mandibular first premolar is complex.
出处
《上海口腔医学》
CAS
CSCD
2011年第5期517-521,共5页
Shanghai Journal of Stomatology
基金
上海市科学技术委员会资助项目(08DZ2271100)~~
