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

Abstract

<p class="AbstractContent"><strong>Background: </strong>Polymethyl Methacrylate (PMMA) permits filler reinforcements which influences the translucency properties to contribute in the aesthetic values of provisional crowns.</p><p class="AbstractContent"><strong>Objective: </strong>To evaluate the translucency of PMMA reinforced with ZrO₂-Al₂O₃-SiO₂filler system in influencing aesthetics features of the crown.</p><p class="AbstractContent"><strong>Methods: </strong>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.</p><p class="AbstractContent"><strong>Results: </strong>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.</p><p class="AbstractContent"><strong>Conclusion: </strong>The different concentration of ZrO₂-Al₂O₃-SiO₂filler exhibits an erratic influence of translucency.<strong> </strong></p>