Services on Demand
Journal
Article
English (pdf)
Article in xml format
Article references
Automatic translation
Send this article by e-mailIndicators
Cited by SciELO 
Access statistics
Related links
Similars in
SciELO
Share
Permalink
Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial
Print version ISSN 1646-2890On-line version ISSN 1647-6700
Abstract
NEVES, Cristina Bettencourt et al. Microhardness and flexural strength of two 3D-printed denture base resins. Rev Port Estomatol Med Dent Cir Maxilofac [online]. 2022, vol.63, n.4, pp.198-203. Epub Dec 30, 2022. ISSN 1646-2890. https://doi.org/10.24873/j.rpemd.2022.11.883.
Objectives:
To evaluate the microhardness and flexural strength of printed and conventionally produced denture base acrylic resins.
Methods:
A total of 32 parallelepiped specimens (64×10×3.3 mm) were manufactured using two light-cured resins suitable for 3D printing (V-Print Dentbase and Denture 3D+) and two heat-cured resins for conventional production (Probase Hot and Villacryl Rapid) (n=8). After 24-h storage in water, Knoop microhardness (98.12 mN load for 30 s) and three-point flexural strength (1 kN load cell, at a crosshead speed of 5 mm/min and 50 mm between rods) were determined. Microhardness data were analyzed with one-way ANOVA followed by Tukey post-hoc tests. Flexural strength data were submitted to the Kruskal-Wallis test. A significance level of 5% was considered (α=0.05).
Results:
The resins showed statistically significant (p<0.001) differences regarding microhardness (V-Print Dentbase < Denture 3D+ < Probase Hot < Villacryl Rapid). No statistically significant (p=0.527) differences were found in flexural strength between the four resins.
Conclusions:
The printed resins had lower microhardness values than conventional resins, but all resins showed similar flexural strength.
Keywords : 3D-printing; CAD-CAM; Denture base resin; Flexural strength; Hardness.
