Analysis of root canal preparation using to clearing technique

Introduction: The endodontic treatments have evolved in order to prepare the root canal system to receive a hermetic filling of the system and preserve the health of periapical and/or restore it when affected by tissue injury. These are achieved through obedience the a suitable chemical-mechanical preparation, then the filling of the same.Objective:Analyze the chemo-mechanical preparation of root canals performed in vitro by students of Dentistry of the Federal University of Espírito Santo, using the clearing technique.Material and method: 88 dental specimens (lower canines) were used, and provided to students who performed in vitro preparation chemo-mechanical. These specimens were radiographed and subsequently submitted to leaf clearing technique. The quality of the preparation chemical-mechanical techniques was examined concern the shaping of the root canal and compared the best result of the same, visualized the anatomical features of the root canal system, compared the radiographic exam of the teeth and clearing technique.Result: the modeling of root canals analyzed by the clearing technique, 67% were modeled with a statistical significance of 0.002 (p<0.05) and as the concordance of the results of variable modeling of the root canals between the radiographic examination and clearing technique yielded a Kappa value=0.511 showing a moderate agreement between the two visualization techniques.Conclusion:The radiography proved to be limited in view of the channel modeling and also in view of the anatomical features of the root canal system, and also that the clearing technique is a visualization technique accessible and essential to the evolution of education in Endodontics.

引言：牙髓治疗术的发展旨在完善根管系统预备流程，以实现根管系统的严密充填，并维持根尖周组织健康，或在根尖周组织受损伤时修复其健康状态。上述目标需通过遵循规范的化学机械预备流程，随后完成根管充填来达成。
研究目的：采用透明根管技术（clearing technique），分析巴西圣埃斯皮里图联邦大学牙科学专业学生体外完成的根管化学机械预备操作效果。
材料与方法：本研究选取88颗下颌尖牙作为实验标本，交由圣埃斯皮里图联邦大学牙科学专业学生开展体外化学机械根管预备。所有标本均先行拍摄X线片，随后采用透明根管技术进行处理。本研究对化学机械预备技术的质量评估围绕根管成形效果展开，同时观测根管系统的解剖特征，并对比X线摄影与透明根管技术两种可视化手段的观测结果，对二者的评估结果进行比对。
研究结果：经透明根管技术分析的根管成形病例中，67%的成形效果具有统计学意义（p=0.002，p<0.05）；X线摄影与透明根管技术在根管成形效果评估结果间的一致性Kappa值为0.511，表明两种可视化技术的评估结果存在中等程度的一致性。
研究结论：X线摄影在根管成形效果评估及根管系统解剖特征观测方面存在局限性；而透明根管技术作为一种易于实施的可视化手段，对牙髓病学教育的发展具有不可或缺的重要意义。