Translucency Evaluation of Polymethyl Methacrylate (PMMA) Reinforced with ZrO₂-Al₂O₃-SiO₂ Filler System in Fabricating Indirect Restoration

Background: Polymethyl Methacrylate (PMMA) permits filler reinforcements which influences the translucency properties to contribute in the aesthetic values of provisional crowns. Objective: To evaluate the translucency of PMMA reinforced with ZrO₂-Al₂O₃-SiO₂filler system in influencing aesthetics features of the crown. Methods: A total of 18 samples of PMMA, fabricated with a heat cure acrylic resin (De Trey® Stellon C) in six groups of three respectively from a controlled (A) and different concentrations at 7% (B), 9% (C), 11% (D), 13% (E) and 15%(F) reinforced with ZrO₂-Al₂O₃-SiO₂ filler system groups. Each sample was made in disc forms with diameter and thickness of (8mm × 3mm). Samples were tested using a UV-VIS Spectrophotometer. Results: The highest total average of translucency for group C at 9% concentration (0.44946λ) and the lowest group Fat 15% concentration (0.42803λ). Statistically, there were no significant differences (α > 0.01) among the groups of PMMA with different concentrations and controlled. Conclusion: The different concentration of ZrO₂-Al₂O₃-SiO₂filler exhibits an erratic influence of translucency.