Occurrence of Dentinal Microcracks in Severely Curved Root Canals with Pro Taper Universal, WaveOne, and ProTaper Next File Systems
Occurrence of Dentinal Microcracks in Severely Curved Root Canals with Pro Taper Universal, WaveOne, and ProTaper Next File Systems
复制标题
使用 ProTaper Universal、WaveOne 和 ProTaper Next 文件系统在严重弯曲的根管中出现牙质微裂纹。
DOI：
10.1016/j.joen.2015.08.005
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发表时间：
2015-11-01
影响因子：
4.2
通讯作者：
Huang, Ding-ming
中科院分区：
文献类型：
--
作者：
Li, Shu-hui;Lu, Ying;Huang, Ding-ming
简介：本研究旨在比较ProTaper Universal（Dentsply Maillefer，Ballaigues，Switzerland）、WaveOne（Dentsply Maillefer）和ProTaper Next（Dentsply Maillefer）锉系统在严重弯曲根管的根管治疗过程中使用染色技术产生牙本质微裂纹的发生率。方法：60颗离体磨牙，根曲25 ~ 40个，分为3组，每组20个根管。ProTaper Universal、WaveOne和ProTaper Next锉系统用于根管手术。60颗磨牙的未处理根管作为阴性对照。制备后，所有根用1%亚甲蓝染色24小时。然后在冷水下用低速锯在最弯曲的平面和最弯曲的平面下方和上方2 mm处将根切片。使用体视显微镜在60倍放大倍率下检查牙本质微裂纹，并使用卡方检验分析这3种器械组之间的差异。结果如下：与ProTaper Universal和WaveOne系统相比，ProTaper Next系统诱导的完全和不完全牙本质微裂纹较少（P < .05），ProTaper Universal和WaveOne系统之间无显著差异（P > .05）。与其他2个平面相比，ProTaper Universal和WaveOne系统在最弯曲平面上方2 mm的平面中诱导了明显更完全的裂缝（P = .004）。结论：与ProTaper Universal和WaveOne系统相比，ProTaper Next系统在严重弯曲根管的根管治疗过程中诱导的牙本质微裂纹较少。
Introduction: This study aims to compare the incidence of dentinal microcracks produced by the ProTaper Universal (Dentsply Maillefer, Ballaigues, Switzerland), WaveOne (Dentsply Maillefer), and ProTaper Next (Dentsply Maillefer) file systems during root canal procedures in severely curved canals using a dyeing technique. Methods: Sixty extracted human molars with 25 to 40 root curvatures were divided into 3 groups of 20 canals each. ProTaper Universal, WaveOne, and ProTaper Next file systems were used for root canal procedures. Untreated root canals of 60 molars served as negative controls. After preparation, all roots were stained with 1% methylene blue for 24 hours. Roots were then sectioned at the most curved plane and 2 mm below and above the most curved plane with a low-speed saw under cold water. A stereomicroscope was used to inspect dentinal microcracks at 60x magnification, and differences between these 3 instrument groups were analyzed using the chi-square test. Results: The ProTaper Next system induced less complete and incomplete dentinal microcracks compared with the ProTaper Universal and WaveOne systems (P < .05), and there were no significant differences between the ProTaper Universal and WaveOne systems (P > .05). The ProTaper Universal and WaveOne systems induced significantly more complete cracks in the plane 2 mm above the most curved plane compared with either of the other 2 planes (P = .004). Conclusions: The ProTaper Next system induces less dentinal microcracks during root canal procedures in severely curved root canals compared with the ProTaper Universal and WaveOne systems.