Comparison of surface defects in Protaper Next and Hyflex EDM files after single clinical use – A stereoscopic evaluation Authors Faizan Javed Department of Surgery, The Aga Khan University, Karachi, Pakistan Momina Anis Motiwala Department of Surgery, The Aga Khan University, Karachi, Pakistan Muhammad Farhan Raza Khan Department of Surgery, The Aga Khan University, Karachi, Pakistan Robia Ghafoor Department of Surgery, The Aga Khan University, Karachi, Pakistan DOI: https://doi.org/10.47391/JPMA.20-1056 Abstract Objective: To compare the surface defects created on the ProTaper Next files versus Hyflex EDM files after single clinical use in molars. Methods: One hundred and fourteen Nickel-Titanium files belonging to two contemporary systems, HyFlex EDM and ProTaper Next, were used to perform complete root canal treatment of a molar tooth. The files were first visually examined and then analyzed under 25.6x magnification using a stereomicroscope for evaluation of surface defects. A photographic record was maintained and studied. Descriptive statistics were calculated for frequency of defects. Chi-square test was used to check the association between file and defect type. Odd’s ratio was calculated to check the strength of association between file type and microscopic presence of defects. Results: Frequency of files showing defects was 14.9%. Deformation of the cutting edge was the most frequently seen defect type, found in 7.9% files. The frequency of fractured files was 3.5%. The odds of microscopic defects in HyFlex EDM is 2.64 times that of ProTaper Next. Conclusion: Even after single clinical use, HyFlex EDM files are more likely to get microscopic defects on their surface compared to ProTaper files. Continuous... Downloads Full Text Article Published 2022-02-03 How to Cite Faizan Javed, Momina Anis Motiwala, Khan, M. F. R. ., & Robia Ghafoor. (2022). Comparison of surface defects in Protaper Next and Hyflex EDM files after single clinical use – A stereoscopic evaluation. Journal of the Pakistan Medical Association, 72(01), 37–41. https://doi.org/10.47391/JPMA.20-1056 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Issue Vol. 72 No. 01 (2022): JANUARY Section Research Article