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Three types of zirconia surfaces were compared regarding the i-PRF coating effects: 1) grit blasted with 250-\u03bcm spherical alumina particles and acid etched with 20% hydrofluoric acid (ZLA), 2) laser textured with a random (RD) surface pattern, or 3) laser textured with a designed pattern based on 16 lines and 8 passages (L16N8). The coefficient of friction (COF) of the specimens was assessed on a reciprocating sliding pin-on-plate tribometer at 1-N normal load, 1 Hz, and a 2-mm stroke length. Sliding wear tests were carried out against bovine femoral bone tissue in 0.9% sodium chloride solution at room temperature. Surfaces were then assessed by scanning electron microscopy. COF mean values for test groups (0.35, ZLA; 0.45, L16N8) were lower when compared with the control groups (0.52, ZLA; 0.60, L16N8), with the exception of the RD group (0.47, test; 0.43, control). Results did not show significant differences in COF mean values between RD and L16N8 surfaces after coating with i-PRF. The 3-dimensional fibrin network embedded with leukocytes, platelets, and red blood cells was responsible for decreasing COF mean values over the zirconia surfaces, thus providing a lubricant effect. Also, the morphologic aspects of the laser-treated zirconia surfaces increased the adhesion of the platelet-rich fibrin, which could speed up the osseointegration process of zirconia implants.<\/jats:p>","DOI":"10.1177\/00220345241305318","type":"journal-article","created":{"date-parts":[[2025,1,29]],"date-time":"2025-01-29T13:51:08Z","timestamp":1738158668000},"page":"611-619","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Friction of Laser-Textured Zirconia Coated with a Platelet-Rich Fibrin"],"prefix":"10.1177","volume":"104","author":[{"given":"M. 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