单根上颌第二前磨牙根管形态的micro-ct研究.docVIP

精品论文 参考文献 单根上颌第二前磨牙根管形态的Micro-CT研究 李达1、2 杨莹2 李健2（通讯作者） 　　【摘 要】 目的 应用Micro-CT研究单根上颌第二前磨牙的根管形态。方法 收集63颗单根上颌第二前磨牙，通过Micro-CT扫描并三维重建以后，观察分析单根上颌第二前磨牙的根管形态和根管峡区的发生率和位置。结果 在63颗单根上颌第二前磨牙中，其中Ⅰ类根管形态有31颗，占样本总量的49.21%，Ⅱ类根管形态有5颗，占总样本数7.94%，Ⅲ类根管形态有2颗，占总样本数3.17%，Ⅳ类根管形态有2颗，占总样本数3.17%，Ⅴ类根管形态3颗，占总样本数4.76%, Ⅵ类根管形态有16颗，占总样本数25.40%，Ⅶ类根管形态有4颗，占总样本数6.35%；63颗样本的根管峡区发生率为47.62%，距根尖4~5mm的区段根管峡区发生率最高。结论 Micro-CT扫描成像技术是研究根管系统的有效方法，单根上颌第二前磨牙根管系统复杂多变，术者应加强对距根尖4~5mm区段的根管峡区清理、充填对提高根管治疗疗效和根尖手术成功率有积极意义。 　　【关键词】 单根上颌第二前磨牙； 根管形态； 根管峡区； Micro-CT 　　 　　【Abstract】 Objection To study the root canal morphology of one-rooted maxillary second premolars by Micro-CT. Methods 63 single rooted maxillary second premolars were scanned by Micro-CT, the incidence of canal isthmus and root canal morphology was analyzed after 3D reconstruction. Results In the 63 single rooted maxillary second premolars, the Ⅰtypes of root canal morphology have 31, which account for 49.21% of the total quantity, the Ⅱ-Ⅶ types of root canal morphology have 32 ，which account for 50.79% of the total quantity. The incidence rate of canal isthmus is 93.75% in the 32 samples what root canal morphology were Ⅱ-Ⅶ types. The incidence of canal isthmus in the root tip 4-5mm region was the highest in all sections. Conclusion Micro-computed tomography technology is an effective method to study the root canal system, it is complex that root canal system of the single rooted maxillary second premolar, if we can reinforce the cleaning and filling of canal isthmus in the 4-5mm section of the apical ,the success rates of root canal therapy and root-end surgery will be improved. 　　【Key words】 One-rooted maxillary second premolar; Root canal morphology; Root canal isthmus; Micro-computed tomography 　　牙髓炎及根尖周病是人类口腔疾病之中的常见病，多发病，而根管治疗是治疗牙髓炎和根尖周病首选的治疗方法[1]，其原理是对感染的根管进行彻底清理，预备成形，消毒最后充填，预防感染的再次发生；成功完善的根管治疗是基于对患牙根管系统的充分了解，不遗漏根管，彻底清除根管感染物，严密的根管充填。临床上根管治疗失败大多是因为对根管系统的不了解，导致遗漏根管，或者对根管峡区感染组织清理不彻底;因此,了解根管系统解剖形态以及根管峡区的位置对根管治疗的成功和根尖手术有重要的意义；本研究主要