Özdemir, OlcayKoçak, SibelHazar, EcehanSaglam, Baran CanKoçak, Mustafa Murat2024-09-292024-09-292023https://doi.org/10.14744/TEJ.2023.6253https://search.trdizin.gov.tr/tr/yayin/detay/1239727https://hdl.handle.net/20.500.14619/10253Purpose: This study aimed to compare HyFlex electrical discharge machining Glide Path, ProGlider, TruNatomy Glider, and WaveOne Gold Glider in terms of topographic changes after instrumentation. Methods: Simulated canals with 40° curvature were used to analyze the surface behavior of four brands of micro-glide path files (n = 36 in total, n = 3/subgroup). The files were used in single or three simu- lated canals for micro- glide path preparation. Surface topographies were evaluated using atomic force microscopy. The data were analyzed with Shapiro–Wilk and two-way robust analysis of variance tests. Results: RMS median values did not differ according to the file groups (p = 0.448) and use (p = 0.055). There was a significant difference between the intact WaveOne Gold Glider group and the use of 3 times (p = 0.002). Conclusion: The tested files exhibited acceptable surface behavior considering single use but in multi- rooted teeth. However, it should be considered that more surface distortion occurs on the surface of heat-treated files when used for multiple roots, especially curved ones.eninfo:eu-repo/semantics/openAccessArticle10.14744/TEJ.2023.6253115311012397278