Soi Sonal, Yadav Suman, Sharma Sumeet, Sharma Mohit
Reader, I.T.S Dental College, Hospital and Research Centre, Greater Noida, India.
Professor, Department of Conservative Dentistry and Endodontics, Sri Guru Gobind Tricentenary Dental College, Research Center and Hospital, Gurgaon, India.
J Dent Res Dent Clin Dent Prospects. 2015 Summer;9(3):131-7. doi: 10.15171/joddd.2015.026. Epub 2015 Sep 16.
Background and aims. During root canal preparation, debris extruded beyond the apical foramen may result in periapical inflammation and postoperative pain. To date no root canal preparation method has been developed that extrudes no periapical debris. The purpose of this study was to identify a system leading to minimal extrusion of debris from the apical foramen. The study was conducted to comparatively evaluate the amount of apical extrusion of debris during root canal preparation using hand ProTaper and GT rotary and RaCe rotary instruments using crown-down technique. Materials and methods. Ninety freshly extracted human single-rooted mandibular premolars were equally assigned to three groups (n=30). The root canals were instrumented using hand ProTaper, GT rotary and RaCe rotary systems. Debris and irrigant extruded from the apical foramen were collected into vials. The mean weight of the remaining debris was calculated for each group and subjected to statistical analysis. Results. ANOVA was used to compare the mean dry weights of the debris extruded in the three groups, followedby post hoc Tukey tests for multiple comparisons the between groups. Highly significant differences were found in the amount of debris extruded among all the groups (P<0.001). The ProTaper group exhibited the highest mean debris weight (0.8293±0.05433 mg) and the RaCe system exhibited the lowest mean debris weight (0.1280±0.01606 mg). Conclusion. All the systems tested resulted in apical extrusion of debris. However, the hand ProTaper files extruded a significantly higher amount of debris than GT and RaCe systems.
背景与目的。在根管预备过程中，超出根尖孔挤出的碎屑可能导致根尖周炎和术后疼痛。迄今为止，尚未开发出一种不挤出根尖碎屑的根管预备方法。本研究的目的是确定一种使根尖孔碎屑挤出量最小的系统。本研究旨在比较评估使用冠向下技术，采用手用ProTaper、GT旋转器械和RaCe旋转器械进行根管预备时根尖碎屑的挤出量。材料与方法。将90颗新鲜拔除的人单根下颌前磨牙平均分为三组（n = 30）。使用手用ProTaper、GT旋转器械和RaCe旋转系统对根管进行预备操作。从根尖孔挤出的碎屑和冲洗液收集到小瓶中。计算每组剩余碎屑的平均重量，并进行统计分析。结果。采用方差分析比较三组挤出碎屑平均干重，并随后进行组间多重比较后的Tukey检验进行分析。所有组间在碎屑挤出量上均发现高度显著差异（P <0.001）。ProTaper组的平均碎屑重量最高（0.8293±0.0543 mg），而RaCe系统的平均碎屑重量最低（0.1280±0.0161 mg）。结论。所有测试系统均导致根尖碎屑挤出。然而，手用ProTaper锉挤出的碎屑量显著高于GT和RaCe系统。
