Micro CT analysis of amount of dentin removal created by SAF vs. ProTaper systems

Abstract

Background: Dentin removed during root canal system instrumentation for creating adequate geometry for thecanal and cleaning the canal. A new instrument had been marketed with the aim of optimum shaping of all parts ofthe canal system, however, no information present about the amount of dentin removal compared to conventionalrotary system. This study investigated the amount of dentin removal when the canal instrumented by SAF comparedwith ProTaper by using high resolution computed tomography (micro CT).Materials and Methods: Twenty extracted single canalled teeth were utilized for this study; and randomly divided into2 groups. In the first group, the root canals were prepared by using protaper rotary system till F2 and the root canalirrigated with 1ml of normal saline after each instrument. The root canals in the second group were prepared usingSAF for 2min, with continuous irrigation (normal saline). After rescanning, the amount of dentin removal wascalculated.Result: It was clear that the use of SAF system had increase the amount of dentin removal and in quantity larger thanthat did by ProTaper system & the mean of net difference was (0.288mm ± 0.051). By using t-independent test, therewas highly significant difference between the two groups at (p=0.001), with in favor of the SAF system over ProTapersystem at p< 0.01; in dentin removal quantityConclusion: Root canal preparation with SAF-system resulted in more and effectively removed dentin whencompared with protaper rotary files