Shaping Ability of Instrumental Nickel-titanium Endodontic Files in S-shaped Resin Simulated Root Canal

doi:10.13701/j.cnki.kqyxyj.2020.08.018

Abstract

Abstract: Objective: To compare the shaping ability of R-Pilot (RP), One G (OG), ProGlider (Pr), PathFile (Pa), HyFlex EDM Glidepath File (EDM), and manual stainless steel K-file (K file) in S-shaped resin simulated root canal. Methods: A total of 48 S-shaped resin simulated root canal blocks were divided randomly into six groups (n=8). Each group was prepared with each instrument, respectively. Preparation time was recorded. Pre- and post-operative images were obtained using a scanner and superimposed using Photoshop. The material removal was measured using ImageJ from the inner and outer canal walls beginning from 0 mm at the end point of the root canal. Centering ability was determined, accordingly. The data were analyzed using the One-Way ANOVA at a significance level of P<0.05. Results: In the term of preparation time, RP and OG were significantly shorter than the others (P<0.05). In the term of the material removal of resin, at the apical curve (0-3 mm from the apical foramen), RP, OG, Pr, and Pa were significantly less than EDM and K file (P<0.05). At the coronal curve (4-6 mm from the apical foramen),RP, OG, and K file were significantly less than EDM (P＜0.05), and were significantly more than Pr and Pa (P＜0.05). As far as the centering ability was concerned, at the apical curve, RP and OG were the optimum (P＜0.05). At the coronal curve,Pr and Pa were the optimum (P＜0.05),followed by RP, OG, and K file (P＜0.05). Conclusion: For glide path preparation of S-shaped root canal, the 03-04 tapered nickel-titanium files were suitable, which had shorter preparation time, better centering ability, and the flare of the canal.

Key words: reciprocating motion, nickel-titanium endodontic file, glide path, S-shaped resin simulated root canal, root canal shaping ability

YU Jiangli, TAN Yao, HOU Xiaomei, HAN Yi. Shaping Ability of Instrumental Nickel-titanium Endodontic Files in S-shaped Resin Simulated Root Canal[J]. Journal of Oral Science Research, 2020, 36(8): 781-785.

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