Franziska Haupt1, Jonas Robert Wilhelm Pult2, Michael Hülsmann2. 1. Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Germany. Electronic address: franziska.haupt@med.uni-goettingen.de. 2. Department for Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen, Germany.
Abstract
AIM: Micro-CT assessment of preparation of moderately single- and double curved root canals using three single-file reciprocating NiTi-systems: S1 Plus Standard (Sendoline, Täby, Sweden; S1P), WaveOne Gold Primary (Dentsply Sirona, Ballaigues, Switzerland; WOG), Reciproc R25 (VDW, Munich, Germany; REC) MATERIALS AND METHODS: Seventy-five moderately curved mandibular molars with two separate mesial root canals were assigned to three experimental groups (n=25): S1P, WOG, REC by forming matched triples according to curvature (15-40°), radius (≤18 mm) and type of curvature (single- or double-curved). Teeth were scanned before and after root canal preparation with a resolution of 10.5 μm using micro-computed tomography (Bruker SkyScan 1272, Bruker Corporation, Belgium). The following parameters were assessed: changes in root canal volume and surface area, percentage of unshaped canal walls, structure model index, canal transportation and centering ratio. Data were analyzed using 2- and 3-way ANOVA with Tukey's and Scheffés post hoc tests (significance level of 5%). RESULTS: No significant differences among groups were observed concerning all parameters. The type of curvature had no significant effect on all tested parameters. Within all experimental groups, canal transportation increased significantly from the apical to the coronal region, of which the majority was directed towards the furcational area. CONCLUSIONS: Preparation with the three NiTi-systems did not result in significantly different dimensional changes and there was no significant effect of the type of curvature on all tested parameters.
AIM: Micro-CT assessment of preparation of moderately single- and double curved root canals using three single-file reciprocating NiTi-systems: S1 Plus Standard (Sendoline, Täby, Sweden; S1P), WaveOne Gold Primary (Dentsply Sirona, Ballaigues, Switzerland; WOG), Reciproc R25 (VDW, Munich, Germany; REC) MATERIALS AND METHODS: Seventy-five moderately curved mandibular molars with two separate mesial root canals were assigned to three experimental groups (n=25): S1P, WOG, REC by forming matched triples according to curvature (15-40°), radius (≤18 mm) and type of curvature (single- or double-curved). Teeth were scanned before and after root canal preparation with a resolution of 10.5 μm using micro-computed tomography (Bruker SkyScan 1272, Bruker Corporation, Belgium). The following parameters were assessed: changes in root canal volume and surface area, percentage of unshaped canal walls, structure model index, canal transportation and centering ratio. Data were analyzed using 2- and 3-way ANOVA with Tukey's and Scheffés post hoc tests (significance level of 5%). RESULTS: No significant differences among groups were observed concerning all parameters. The type of curvature had no significant effect on all tested parameters. Within all experimental groups, canal transportation increased significantly from the apical to the coronal region, of which the majority was directed towards the furcational area. CONCLUSIONS: Preparation with the three NiTi-systems did not result in significantly different dimensional changes and there was no significant effect of the type of curvature on all tested parameters.