Dentin Preservation in the pericervical area after preflaring with Gates-Glidden or X-Gates drills. An ex vivo micro CT study
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Date
2016
Authors
Wong, Bryan
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Abstract
Introduction: This study compared the dentin preservation in the distal wall of mesial canals in mandibular molars after preflaring with X-Gates (XG, Dentsply Tulsa Specialities, Tulsa, OK) or Gates-Glidden (GG) drills (Dentsply Tulsa Specialites). Methods: Sixty mesial canals of mandibular molars were evenly allocated into two balanced groups for preflaring procedures: group XG – canals were preflared with a single XG drill or group GG - Drill series (n.1, 2, 3 and 4). With the aid of a micro-computed tomography scanner, dentin removal towards the furcation was measured at 3 levels: furcation (0 mm), 1mm, and 2mm apically. A paired t-test was performed to assess differences before and after procedures in the same group and one-way ANOVA was performed to assess differences between the groups. Results: Significant decrease in dentin thickness was found in the distal area of mesial roots after preflaring procedures in both groups (P < .0001). No significant difference (P > .05) was observed between XG and GG with regard to dentin preservation. Regarding the level where preflaring was done, significant difference (P < .05) was only detected in the mean values of dentin thickness between 0 mm (411.6 um) and 2mm (251.4 um) in the XG group. Conclusion: Both XG and GG groups resulted in significant decrease in dentin thickness but no difference was observed between the XG drill group and GG drill group in dentin removal towards the “danger zone”.
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Dentistry