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3D-Printed Versus Conventional Dental Provisional Resins: A Comparative Study.
Olívia Breda Moss1, Anselmo Agostinho Simionato1, Adriana Cláudia Lapria Faria1
1Department of Dental Materials and Prostheses, School of Dentistry of Ribeirão Preto, University of São Paulo, Café Avenue SN, Ribeirão Preto 14040-904, SP, Brazil.
Medicina (Kaunas, Lithuania)
|February 27, 2026
Summary
Acidic beverages significantly alter temporary crown resins, increasing color change and roughness while decreasing microhardness. Polishing offers the best surface protection for these dental materials.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Surface Engineering
Background:
- Temporary crowns are crucial in restorative dentistry, requiring durable and aesthetically stable materials.
- 3D-printed resins and conventional self-curing resins are utilized for temporary restorations.
- Surface finishing protocols can influence the physical and optical properties of dental resins.
Purpose of the Study:
- To compare the effects of immersion in acidic beverages and brushing on two 3D-printed resins (Nanolab, PrintaX) and one self-curing resin (Duralay).
- To evaluate how different surface finishing protocols (extrinsic pigment + glaze, glaze only, polish only) affect resin properties.
- To assess color alteration, surface roughness, and Knoop microhardness after simulated intraoral challenges.
Main Methods:
- Fabrication of resin specimens using 3D printing (Nanolab, PrintaX) and silicone matrices (Duralay).
- Application of three surface finishing protocols: extrinsic pigment with glaze, glaze only, and polish only.
- Immersion in cola, energy drink, or distilled water for six days, followed by a standardized brushing test.
- Analysis of color change (ΔE₀₀), surface roughness, and Knoop microhardness.
Main Results:
- All tested factors significantly impacted resin properties (p < 0.05).
- Nanolab showed the most significant color changes (up to ΔE₀₀ 22.21) and increased roughness, especially in acidic conditions.
- Duralay exhibited the highest Knoop microhardness changes across various experimental groups.
- Polishing consistently yielded superior results in color stability, surface roughness, and microhardness compared to other finishing methods.
Conclusions:
- Acidic challenges significantly degrade the optical and surface properties of temporary crown resins, with varying degrees of impact based on material type.
- Material selection and minimizing exposure to acidic beverages are critical for maintaining the integrity and aesthetics of provisional restorations.
- Polishing emerges as the most effective surface treatment for enhancing resin resistance to environmental degradation.
