Effects of irrigation on debris and smear layer on canal walls prepared by two rotary techniques: A scanning electron microscopic study
Effects of irrigation on debris and smear layer on canal walls prepared by two rotary techniques: A scanning electron microscopic study
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DOI：
10.1097/00004770-200001000-00002
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发表时间：
2000-01-01
影响因子：
4.2
通讯作者：
Barbakow, F
中科院分区：
文献类型：
--
作者：
Peters, OA;Barbakow, F
在使用Lightspeed（LS）或Profile（PF）旋转器械制备的根管内评价碎屑和玷污层。所用的冲洗剂为自来水（A组）或交替的5.25% NaOCl和17% EDTA（a组）。在LS技术中，将根尖挡块制备为52.5号，在PF技术中制备为6号（约ISO 36号）。根纵向分裂，并检查在顶端，中间和冠状水平的碎片和玷污层使用5个步骤的规模。仅使用水，LS和PF的平均碎片评分相似。相反，EDTA/NaOCl，LS和PF制备的根管在根尖和冠状面水平具有相似的碎片评分，但在中间水平存在显著差异。当水是唯一的冲洗剂时，LS和PF形根管的平均玷污层评分相似。相比之下，NaOCl和EDTA，平均玷污层评分显着不同，在顶端和中间水平，但不是在冠状面水平。这两种技术在清除碎屑方面均不具有上级优势，但本研究中使用LS器械获得的较大根管准备能够更有效地清除EDTA-NaOCl组的玷污层。
Debris and smear layer were evaluated in canals prepared with either Lightspeed (LS) or Profile (PF) rotary instruments. Irrigants used were tap water (group A) or alternating 5.25% NaOCl and 17% EDTA (group a), Apical stops were prepared to size 52.5 in the LS and to size 6 (approximately ISO size 36) in the PF techniques. The roots were split longitudinally and examined at apical, middle and coronal levels for debris and the smear layer using a 5-step scale. Using only water, mean debris scores were similar for LS and PF. In contrast, with EDTA/NaOCl, LS- and PF-prepared canals had similar debris scores at the apical and coronal levels, but there was a significant difference at the middle level. Mean smear layer scores were similar in LS- and PF-shaped canals when water was the sole irrigant. In contrast, with NaOCl and EDTA, mean smear layer scores were significantly different at the apical and middle levels, but not at the coronal level. Neither technique was superior in removing debris, but larger canal preparations obtained in this study with LS instruments enabled a more effective removal of the smear layer in the EDTA-NaOCl group.