BMC Oral Health. 2025 Nov 22. doi: 10.1186/s12903-025-07362-8. Online ahead of print.
ABSTRACT
BACKGROUNDS: 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.
METHODS: Two 3D-printed resins, Varseo Smile Crown (BEGO, Germany) and Saremco Print Crowntec (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 + Polishing paste, Enhance + Twist Dia + Polishing paste, and glazing). An additional group received no polishing and served as the control. Gloss values were measured using a glossmeter (NovoGloss; Rhopoint Instrument, UK) at three time points: after fabrication (T0), after polishing (T1), and after 1- hour aging (T2). After the first measurement, 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. 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: Initial gloss values of both 3D-printed resins were comparable, with glazing achieving the highest gloss. Regardless of the polishing technique, the composite resin exhibited the highest gloss values, with the Enhance + Polishing paste method yielding the best results. Among all aging procedures, toothbrushing mechanical aging resulted in the most significant gloss reduction for all three materials.
CONCLUSION: For the composite resin, the Enhance + Polishing paste technique provided the highest gloss. For the 3D-printed resins, glazing was the most effective method in achieving higher gloss. Mechanical aging had the greatest detrimental effect on gloss for all tested materials.
PMID:41275278 | DOI:10.1186/s12903-025-07362-8
