Histological evaluation of the effectiveness of five instrumentation techniques for cleaning the apical third of root canals
Histological evaluation of the effectiveness of five instrumentation techniques for cleaning the apical third of root canals
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DOI：
10.1016/s0099-2399(97)80309-3
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发表时间：
1997-08-01
影响因子：
4.2
通讯作者：
Dantas, CJS
中科院分区：
文献类型：
--
作者：
Siqueira, JF;Araujo, MCP;Dantas, CJS
通过组织学检查评估五种器械技术对弯曲根管根尖三分之一的清洁效果。新拔除的人下颌磨牙近中根管采用以下预备方法制备：不锈钢锉步退技术；镍钛锉退步技术；超声技术;平衡力技术；和运河大师U技术和仪器。对根的根尖部分进行组织学处理，并检查横截面是否有残留的软组织、牙本质和碎片。结果显示不同技术间无显著差异。虽然这五种内固定方法可以有效地清除根管中的大部分组织，但没有一种方法可以完全清除整个根管系统，特别是当内部解剖结构存在变化时。
The efficacy of five instrumentation techniques for cleaning the apical third of curved root canals was assessed by histological examination. Mesial root canals of freshly extracted human mandibular molars were prepared by the following instrumentation methods: step-back technique using stainless steel files; step-back technique using nickel-titanium files; ultrasonic technique; balanced force technique; and Canal Master U technique and instruments.The apical portion of the root was histologically processed, and cross-sections were examined for remaining soft tissue, predentin, and debris. The results showed no significant differences among the techniques. Although the five instrumentation methods were effective in removal of major amounts of tissue from the canals, none totally debrided the entire root canal system, especially when variations in the internal anatomy were present.