20.500.12556/RUL-153148 Effect of airborne particle abrasion and regeneration firing on the strength of 3D-printed 3Y and 5Y zirconia ceramics Objectives: This study aimed to assess the effect of airborne particle abrasion (APA) and regeneration firing (RF) on the subsurface damage and strength distribution of 3D-printed 3Y-TZP and 5Y-PSZ zirconia parts for dental applications. Methods: Disc-shaped specimens were prepared using vat photopolymerization (VPP) technology from 3Y and 5Y zirconia ceramics, followed by thermal debinding and sintering. APA treatment with 50 µm Al$_2$O$_3$ particles and RF at 1000 °C for 15 min were applied. Microstructural analysis was conducted using FIB-SEM, and XRD analysis determined crystalline phase content. Biaxial flexural strength was measured using the ball on three balls method and analyzed with Weibull statistics. ANOVA and Tukey HSD test were employed to compare strength differences between groups. Results: APA treatment increased the flexural strength of the 3Y specimens but decreased it for the 5Y specimens. RF treatment reversed the effect, restoring the strength to as-sintered levels for both materials. APA-treated 3Y specimens exhibited characteristic strength values above 1400 MPa, attributed to phase-transformation toughening. As sintered 5Y specimens showed strength values above 600 MPa. APA treatment increased the Weibull modulus of the 5Y specimens, indicating a narrower defect size distribution. Significance: The study demonstrates that the impact of APA and RF treatments on the mechanical properties and reliability of VPP-fabricated 3Y-TZP and 5Y-PSZ ceramics is comparable to conventionally prepared zirconia. VPP technology for 3D printing provides a viable approach for future manufacturing of dental restorations with potential clinical applications. dental zirconia vat photopolymerization biaxial flexural strength airborne-particle abrasion regeneration firing true false true Angleški jezik Ni določen Članek v reviji 2023-12-19 11:32:05 2023-12-19 11:32:06 2023-12-20 03:43:14 0000-00-00 00:00:00 2024 0 0 Str. 111–117 iss. 1 Vol. 40 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1/.2 0109-5641 10.1016/j.dental.2023.10.025 170710019 1-s2.0-S0109564123004360-main.pdf 1-s2.0-S0109564123004360-main.pdf 1 7C31C1F9858491242A2F63D9DA30D4C2 0364468eff44078d2870621b4dcaf1a5bc2aaae61a574e2144095a9bc4ee5bbc 3ce9e6fd-9e5a-11ee-805c-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=179058 https://www.sciencedirect.com/science/article/pii/S0109564123004360 0 1df992db-9e5a-11ee-805c-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=179057 Medicinska fakulteta 0 0 0