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背景:根管玷污层可影响根管药物进行消毒,同时可降低充填材料与根管壁的密合性,还可使根尖微渗漏显著增加,造成根管治疗的失败,而能否有效去除玷污层是临床上成功进行根管治疗的前提和关键。目的:从螯合剂基本结构出发对其去除根管玷污层作用进行叙述,深入解析影响螯合剂去除玷污层效果的各种因素。方法:第一作者利用计算机检索Medline数据库(1999年1月至2011年12月),以“Chelating agent,smear layer,root canal irrigation,root canal preparation”为检索词进行文献初检,筛选后纳入50篇文章进行综述。结果与结论:影响玷污层去除的因素还有冲洗液的浓度、温度、冲洗量、作用时间、冲洗液的输送方式、与其他冲洗液的协同作用等,其中影响螯合剂去除玷污层的因素主要是冲洗时间和冲洗液的配伍问题,螯合剂对牙本质小管的侵蚀,作用时间越长对其破坏越大。超声的震荡方式也可以增强螯合剂的作用能力,更快的速度到达根尖区,其与次氯酸钠联合应用可提高效能,至于最佳组合仍有待进一步探讨。
Background: The root canal smear layer can affect the root canal drug disinfection, while reducing the packing material and root canal wall adhesion, but also make the apical microleakage significantly increased, resulting in failure of root canal therapy, and can be effective Removal of smear layer is the premise and key to successful root canal therapy in clinic. OBJECTIVE: To describe the effect of removing the smear layer of root canal from the basic structure of chelator, and to analyze thoroughly the various factors that affect the effect of chelating agent on the removal of smeared layer. Methods: The first author searched the Medline database (January 1999 to December 2011) by computer and carried out the initial examination of the literature with “Chelating agent, smear layer, root canal irrigation, root canal preparation” as the search term. After screening Include 50 articles for review. RESULTS AND CONCLUSION: Factors influencing the removal of smear layer include the concentration of rinsing liquid, temperature, rinsing amount, duration of action, the manner of rinsing solution delivery, synergetic effect with other rinsing fluids, etc. The factors affecting the removal of smear layer by chelating agent are mainly Is flushing time and flushing compatibility issues, chelating agents on the erosion of dentinal tubules, the longer the role of their destruction. Ultrasound mode of oscillation can also enhance the role of chelators, to reach the apical region faster, and its combination with sodium hypochlorite can improve performance, the optimal combination remains to be further explored.