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目的:探讨根管治疗术后牙根纵折的发生与不同根管预备技术的相关性,为临床治疗提供依据。方法:对2年间共1702颗(例)牙根管治疗术后病例进行调查,将其按根管预备技术分为镍钛旋转预备技术组(643例)和手用不锈钢预备技术组(1059例)。通过临床症状、体征和影像学结果进行评估。采用SPSS11.5软件包对数据进行统计学分析。结果:共发生牙根纵折32例(1.88%);镍钛旋转器械预备组牙根纵折率显著高于手用不锈钢器械预备组(P<0.01);镍钛旋转器械预备组根管再治疗的牙根纵折率显著高于手用不锈钢器械预备组(P<0.01),但2组的根管桩核修复病例的牙根纵折率无显著差异(P>0.05)。结论:镍钛旋转器械预备技术与术后根折并发症密切相关,如合并根管再治疗史和(或)根管内桩核修复,牙根纵折的风险更大。
Objective: To investigate the correlation between root canal longitudinal root fracture and different root canal preparation techniques, and to provide basis for clinical treatment. Methods: A total of 1702 cases of root canal treatment after 2 years of operation were investigated. According to the root canal preparation technique, they were divided into NiTi preparation group (643 cases) and stainless steel preparation group (1059 cases ). It is evaluated by clinical symptoms, signs and imaging findings. SPSS11.5 software package for statistical analysis of the data. Results: There were 32 cases (1.88%) of longitudinal root fracture, the vertical root folding rate of preparation group was significantly higher than that of hand stainless steel preparation group (P <0.01), and the group of nickel-titanium rotation equipment root canal re-treatment Zonal longitudinal root fold rate was significantly higher than that of hand stainless steel instrument preparation group (P <0.01), but there was no significant difference (P> 0.05) between the two groups. CONCLUSION: The preparation technique of nickel-titanium rotary instruments is closely related to the postoperative complications of root fractures. For example, the combined root canal re-treatment history and (or) post-core post-core restoration have a higher risk of vertical root fracture.