Root canal volume change and transportation by Vortex Blue, ProTaper Next, and ProTaper Universal in curved root canals
박현진, 서민석, 문영미,
소속 상세정보
박현진 ( Park Hyun-Jin ) - Private practice
서민석 ( Seo Min-Seock ) - Wonkwang University Daejeon Dental Hospital Department of Conservative Dentistry
문영미 ( Moon Young-Mi ) - Wonkwang University Daejeon Dental Hospital Department of Conservative Dentistry
Abstract
Objectives: The aim of this study was to compare root canal volume change and canal transportation by Vortex Blue (VB; Dentsply Tulsa Dental Specialties), ProTaper Next (PTN; Dentsply Maillefer), and ProTaper Universal (PTU; Dentsply Maillefer) nickel-titanium rotary files in curved root canals.
Materials and Methods: Thirty canals with 20°?45° of curvature from extracted human molars were used. Root canal instrumentation was performed with VB, PTN, and PTU files up to #30.06, X3, and F3, respectively. Changes in root canal volume before and after the instrumentation, and the amount and direction of canal transportation at 1, 3, and 5 mm from the root apex were measured by using micro-computed tomography. Data of canal volume change were statistically analyzed using one-way analysis of variance and Tukey test, while data of amount and direction of transportation were analyzed using Kruskal-Wallis and Mann-Whitney U test.
Results: There were no significant differences among 3 groups in terms of canal volume change (p > 0.05). For the amount of transportation, PTN showed significantly less transportation than PTU at 3 mm level (p = 0.005). VB files showed no significant difference in canal transportation at all 3 levels with either PTN or PTU files. Also, VB files showed unique inward transportation tendency in the apical area.
Conclusions: Other than PTN produced less amount of transportation than PTU at 3 mm level, all 3 file systems showed similar level of canal volume change and transportation, and VB file system could prepare the curved canals without significant shaping errors.
키워드
Canal volume; ProTaper Next; ProTaper Universal; Transportation; Vortex Blue; X-ray micro-computed tomography
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