Okutan, YenerGündoğdu, YaseminDönmez, Mustafa BorgaŞeker, HüseyinKılıç, Hamdi Şükür2025-04-182025-04-182024Okutan, Y., Gundogdu, Y., Donmez, M. B., Seker, H., & Kilic, H. S. (2024). Effect of femtosecond laser induced surface patterns on the flexural strength of monolithic zirconia. Journal of Biomedical Materials Research Part B: Applied Biomaterials, 112(6), e35432.1552-49731552-4981http://dx.doi.org/10.1002/jbm.b.35432https://hdl.handle.net/20.500.12713/6814To investigate how patterns generated by femtosecond (fs) laser and femtosecond laser power affect the surface roughness (Ra) and biaxial flexural strength (BFS) of monolithic zirconia. Eighty disk-shaped zirconia specimens were divided into eight subgroups (n = 10): Control (C), airborne-particle abrasion (APA), 400 mW fs laser (spiral [SP(400)], square [SQ((400))], circular [CI(400)]), and 700 mW fs laser ([SP(700)], [SQ((700))], [CI(700)]). Ra values were calculated by using a surface profilometer. One additional specimen per group was analyzed with scanning electron microscopy and x-ray diffractometry. BFS values were obtained by using the piston-on-3-ball test. One-way ANOVA and either Tukey's HSD (BFS) or Tamhane's T2 (Ra) tests were used to evaluate data (alpha = 0.05). Regardless of the pattern and power, fs laser groups had higher Ra than C and APA, while SP groups had lower Ra than CI and SQ groups (p <= 0.004). For each pattern, Ra increased with higher laser power (p < 0.001), while the laser power did not affect the BFS (p >= 0.793). CI and SQ groups had lower BFS than the other groups (p <= 0.040), whereas SP groups had similar BFS to C and APA (p >= 0.430). Fs laser microstructuring with spiral surface pattern increased the Ra without jeopardizing the BFS of zirconia. Thus, this treatment might be an option to roughen tested zirconia.eninfo:eu-repo/semantics/closedAccessAirborne Particle AbrasionBiaxial Flexural StrengthFemtosecond LaserMonolithic ZirconiaSurface RoughnessArticle112619WOS:0012359426000012-s2.0-85195004675Q110.1002/jbm.b.35432Q1