2026 Volume 68 Issue 1 Pages 7-11
Purpose: To investigate the surface roughness (Ra), shear bond strength (SBS), and Vickers hardness number (VHN) of additive manufactured interim resins manufactured through different vat polymerization techniques.
Methods: Samples were divided into four groups; additive manufacturing technology (Stereolithography:S-FL; Digital light processing:D-AS; Liquid crystal display:L-PH) and subtractive manufacturing technology (Polymethylmethacrylate: MP) (n = 10). After polishing, the Ra values were measured and resin material was then applied. Following thermocycling, SBS tests and VHN tests were carried out. The obtained data were evaluated using one-way analysis of variance (ANOVA) (a = 0.05).
Results: Significant differences were observed between the groups for SBS (P = 0.02) and VHN (P < 0.001), whereas the Ra values were not statistically significant (P = 0.148). D-AS and L-PH had higher and similar SBS (P = 1.000) while MP had statistically lower SBS. D-AS demonstrated higher VHN than all groups (P < 0.001) with the exception of S-FL (P = 0.831). MP had lower VHN than all groups (P < 0.01) other than L-PH (P = 0.143).
Conclusion: All fabrication methods had clinically acceptable SBS values, L-PH and D-AS had higher results. D-AS demonstrated superiority in terms of VHN, all groups exhibited comparable Ra values.
