下颌第二恒磨牙牙根及根管系统的显微CT观察

发布时间：2018-03-23 04:18

本文选题：下颌第二恒磨牙　切入点：C形根管　出处：《牙体牙髓牙周病学杂志》2014年08期 　论文类型：期刊论文

【摘要】：目的:观察下颌第二恒磨牙牙根及根管系统的解剖特点。方法:采集中国汉族患者拔除的下颌第二恒磨牙75个,分为双根组(n=32)和C形根组(n=43)。显微CT扫描后用Mimics10.01软件三维重建。比较2组髓室底形态以及各型根管、侧副管的发生情况。结果:双根组近中根根管多为1-1型(31.3%)及2-1型(34.4%),远中根多为1-1型(87.5%);近中根存在侧副根管牙根的发生率(65.6%)高于远中根(25.0%)(P0.05)。C形根组以Ⅰ、Ⅳ型髓室底最为多见(均为30.2%);C形根管以MeltonⅢ型最为常见(58.1%),其次为MeltonⅠ型(27.9%)及MeltonⅡ型(14.0%)。双根组和C形根组存在侧副根管牙根的发生率分别为75%和51.2%(P0.05)。结论:双根下颌第二磨牙近中根的根管系统较远中根复杂;而C形根常常对应一个复杂的C形根管系统。根管峡区不同部位、不同程度的带状牙本质融合会影响C形根管类。
[Abstract]:Objective: to observe the anatomical characteristics of root and root canal system of mandibular second permanent molar. Three dimensional reconstruction with Mimics10.01 software was used to compare the morphology of pulp floor and various types of root canals in the two groups after CT scanning, and were divided into two groups: the double root group was divided into two groups, and the C-shaped root group was divided into three dimensional reconstruction software (Mimics10.01 software). Results: the occurrences of lateral collateral canal in the double root group were mostly 1-1 type 31. 3) and 2-1 type (34. 4%) and the distal root was 1-1 type 87.5%. The incidence of lateral accessory root root in the proximal middle root group was 65.6) higher than that in the distal middle root group (25. 0% P 0. 05%. C root group, I, I, P 0. 05, P 0. 05, P 0. 05, P 0. 05, P 0. 05, P 0. 05, P 0. 05, P 0. 05, P 0. 05, P 0. 05). The incidence of lateral accessory root canal was 75% in double root group and 51.2% in C-shaped root canal in C root group. Conclusion: the incidence of lateral accessory root canal in double root group and C type root group is 75% and 51.2% respectively. Conclusion: the incidence of bilateral root canal is 75% in double root group and 51.2% in C-shaped root group. The root canal system of the second molar near the middle root is more complex than that of the distal middle root. The C-shaped root often corresponds to a complex C-shaped root canal system. Different degrees of zonal dentin fusion will affect the C-shaped root canals in different parts of the isthmus of the root canal.
【作者单位】：西安交通大学机械制造系统工程国家重点实验室;第四军医大学口腔医院口腔解剖生理教研室军事口腔医学重点实验室;第四军医大学口腔医院修复科军事口腔医学重点实验室;吴江区第一人民医院口腔科;第四军医大学唐都医院口腔科;
【基金】：军队青年培育项目(13QNP138) 陕西省自然科学基金(2014JM4110)
【分类号】：R781.05

【相似文献】