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Updated: Feb 7, 2026
Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins
Published on: January 17, 2025
A comparative evaluation of the flexural strength and surface hardness of CAD/CAM fabricated and conventional denture
1Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, 61421, Kingdom of Saudi Arabia. smaalqahtani@kku.edu.sa.
Objective:
The objective of this study is to evaluate the flexural strength and surface hardness of denture base resins that have been milled using computer-aided design and computer-aided manufacturing milling (CAD/CAM) and conventional heat-polymerized denture base resins (HP).
Methods:
Eighty samples were made using CAD/CAM resin material (Polident CAD/CAM and Interdent CC discs) and conventional heat-polymerised acrylic resin (HP) (IvoBase CAD and PMMA). Based on the denture base material, the samples were categorised into eight groups: each group (n = 10), flexural strength (n = 40), surface hardness (n = 40). Both the surface hardness and flexural strength were evaluated using the Vickers hardness test and the three-point flexure test, respectively. A statistical analysis with a significance level of α = 0.05 was used to analyze the data.
Results:
Compared with HP resins, milled CAD/CAM resins demonstrated significantly higher flexural strength and surface hardness (p < 0.001). The flexural strength of MHC 72.72 ± 5.95 is significantly lower than that of IHC 78.96 ± 3.36, PCC 108.59 ± 6.51, and VCC 99.88 ± 6.05 MPa. Surface hardness is significantly lower in MHC (18.40 ± 2.28 VHN) than in the other groups: IHC (21.30 ± 2.40 VHN), PCC (31.07 ± 2.07 VHN), and VCC (27.09 ± 1.55 VHN).
Conclusion:
Compared with heat-polymerized acrylic resin, milled CAD/CAM resins performed exceptionally well in terms of flexural and surface mechanical properties.
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