Comparative Evaluation of Cyclic Fatigue Resistance of Pronix Gold, Pronix Blue, and Protaper Gold Rotary Files

Document Type : Original Article

Authors

1 Department of Endodontics, Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

2 Post Graduate Student, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

10.22122/jids.v21.i3.0218

Abstract


Introduction: File separation within the root canal during canal preparation is a significant concern for dentists. Systems like ProTaper Gold, Pronix Gold, and Pronix Blue are relatively new systems that have been developed by improving NiTi alloys through heat treatment to reduce the risk of file separation. The aim of this study is to determine the cyclic fatigue resistance of Pronix Blue, Pronix Gold, and ProTaper Gold files.
Materials and Methods: In this experimental in-vitro study, conducted at the Dental Materials Research Center of Isfahan Dental School in 2024-2025, 45 rotary files (size F2) of Pronix Blue, Pronix Gold, and ProTaper Gold were used, divided into three groups of 15. All files were inserted into and removed from the canal until fracture, using the same torque and speed. Statistical analysis was performed with a significance level of 5% using one-way ANOVA, followed by Tukey's post hoc test for pairwise comparisons.
Results: The mean number of cycles to failure was 165.40 ± 12.75 for the ProTaper Gold group, 178.60 ± 16.49 for the Pronix Blue group, and 141.20 ± 12.46 for the Pronix Gold group. Tukey's test revealed significant differences in the mean number of cycles to failure between the Pronix Gold and Pronix Blue files and ProTaper Gold (P < 0.001).
Conclusion: The results of this study indicated that the lowest failure resistance was observed in the Pronix Gold rotary file group, while the highest failure resistance was found in the Pronix Blue group.

Highlights

Hamid Razavian: PubMed, Google Scholar

Ali Akhavan: PubMed, Google Scholar

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Journal of Isfahan Dental School
Volume 21, Issue 3
Volume 21, Issue 3, October 2025
October 2025
Pages 218-225

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