Preparation of Long Oval Root Canals in Mandibular Molars with the SAF

Abstract

Introduction: The aim of this study was to assess the shaping potential of a novel nickel-titanium instrument, the self-adjusting file (SAF), in long oval root canals in distal roots in mandibular molars.

Methods: Twenty mandibular molars with long oval distal root canals were selected and scanned preoperatively and postoperatively by using micro–computed tomography at an original resolution of 20 mm. Canals were shaped with the SAF, three-dimensionally reconstructed, and evaluated for volume, surface area, canal transportation, and prepared surface. Data were statistically contrasted by using paired t tests and regression analysis.

Results: Preoperatively, canal volume was 7.73 2.13 mm3, andcanal area was 42.83  8.14 mm2. Volumes and surface areas increased significantly (P < .001) by 4.84  1.73 mm3 and 3.34  1.73 mm2, respectively, and no gross preparation errors were detected.

Conclusions: In vitro, preparation of long oval-shaped root canals in mandibular molars with the SAF was effective and safe

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