Investigation of Surface Gloss Changes in 3D-Printed Resin Materials Following Mechanical and Chemical Aging

Project no. 32634 · Status: Kapanmış · 2024

Summary

Objective: The aim of this study was to compare the gloss values obtained from two different 3D-printed resins and one composite resin following the application of various polishing techniques, and to evaluate their gloss retention after exposure to different aging protocols.Materials and Methods: Two 3D-printed resins [Varseo Smile Crown, A2 (BEGO, Germany) and Saremco Print Crowntec, A2 (Saremco Dental, Switzerland)] and one composite resin (G-aenial Universal Posterior, A2, GC, Japan) were tested. A total of 280 specimens were fabricated and subjected to four different polishing protocols (Enhance + Twist Dia, Enhance + Paste, Enhance + Twist Dia + Paste, and glazing). An additional group received no polishing served as the control. Gloss values were measured using a glossmeter (Rhopoint Instrument, UK). Subsequently, the specimens were subjected to three aging procedures: toothbrushing simulation, exposure to acidic fluoride gel (Elmex Gelée, GABA, Switzerland), and immersion in alcohol (75% ethanol). Distilled water served as the control group. Gloss measurements were recorded at three time points: after fabrication (T0), after polishing (T1), and after 1-hour aging (T2). Data were statistically analyzed using paired t-tests, one-way ANOVA, and Tamhane’s T2 post hoc tests, with significance set at p<0.05.Results: Regardless of polishing technique, the composite resin exhibited the highest gloss values, with the Enhance + Paste method yielding the best results. Initial gloss values of the 3D-printed resins were comparable, with glazing achieving the highest gloss. Among all aging procedures, toothbrushing resulted in the most significant gloss reduction for all three materials.Conclusion: For the composite resin, the Enhance+Paste technique provided the highest gloss. For the 3D-printed resins, glazing was the most effective in achieving high gloss. Mechanical aging had the greatest detrimental effect on gloss for all tested materials.

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