The effect of dentinal tubule orientation on the removal of smear layer by root canal Irrigants

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  • A scanning electron microscopic study

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<jats:p><jats:bold>Summary. </jats:bold> Fifteen anterior teeth and 15 artificial canals obtained from five molar teeth were used in this study. The artificial and natural canals were instrumented with K‐files and then divided into three groups. The first group was irrigated with 20 ml saline, the second with 20 ml EDTA, and the third with 10ml EDTA followed by 10ml NaOCl solution. Following this experimental procedure, all canals were split and examined in a scanning electron microscope. The results showed that the smear layers in both artificial and natural canals were similar in appearance and responded similarly to all irrigation solutions. In addition, in the artificial canals, it was observed that the dentinal tubule orientation had no detectabie effect on formation and removal of smear layers.</jats:p>

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