下颌切牙根管解剖显微CT研究

Study of root canal morphology of mandibular incisors by micro-computed tomography in vitro

目的:采用高分辨率的显微CT观察离体下颌切牙根管解剖结构。方法:收集62颗离体下颌切牙,使用显微CT扫描及三维重建获取每颗牙的解剖数据。结果:83.9%下颌切牙为单根管,72.6%无侧副根管,根尖孔位于旁侧者占56.5%,侧方根尖孔至解剖根尖的距离为(0.613±0.298)mm,下颌切牙根管颊舌向直径及锥度大于近远中向。结论:利用显微CT获得了下颌切牙根管复杂解剖结构的解剖数据。

Objective：To investigate the anatomy of mandibular incisors using microcomputed tomography（Micro-CT）.Methods：62 extracted mandibular incisors were selected from dental clinic and observed by Micro-CT.The anatomy of the teeth was analyzed. Results：83.9% of mandibular incisors had a single canal,72.6% had no accessory canal.The location of the apical foramen varied considerably.The mean distance from the root apex to the major lateral apical foramen was （0.613 ±0.298）mm.Of the canals the bucco-lingual diameter were greater than the mesio-distal diameters and the root bucco-lingual canal tapers were greater than the mesio-distal.Conclusion：The morphology data of mandibular incisors were obtained using Micro-CT.