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Updated: Mar 24, 2026
03:02
Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins
Published on: January 17, 2025
1.2K
Hardness, flexural strength, and flexural modulus comparisons of three differently cured denture base systems
Isma Liza Ali1, Norsiah Yunus, Mohamed Ibrahim Abu-Hassan
1Department of Prosthetic Dentistry, University Malaya, Kuala Lumpur, Malaysia.
Summary
This study found that light- and heat-cured urethane dimethacrylate (UDMA) denture base materials exhibit superior surface hardness, flexural strength, and flexural modulus compared to conventional polymethyl methacrylate (PMMA) resins. These findings suggest UDMA offers enhanced mechanical properties for dental prosthetics.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials Science
Background:
- Denture base resins are crucial for prosthetic success.
- Polymethyl methacrylate (PMMA) is a conventional material, but its mechanical properties can be limiting.
- Urethane dimethacrylate (UDMA) resins offer potential for improved performance.
Purpose of the Study:
- To compare the surface hardness, flexural strength, and flexural modulus of a light- and heat-cured UDMA denture base resin against two conventional PMMA resins.
- To investigate the impact of suboptimal processing conditions on the surface hardness of UDMA specimens.
Main Methods:
- Three denture base materials were tested: Eclipse (UDMA), Meliodent (PMMA), and Probase Cold (PMMA).
- Specimens were prepared according to manufacturers' instructions and stored in water at 37°C for 30 days.
- Surface hardness (Vickers Hardness), flexural strength, and flexural modulus (3-point bending) were measured.
Main Results:
- Eclipse (UDMA) demonstrated significantly higher surface hardness (19.4 VHN), flexural strength (103 MPa), and flexural modulus (2498 MPa) compared to Meliodent (PMMA) and Probase Cold (PMMA).
- No significant difference in surface hardness was found between internal and external surfaces of UDMA specimens processed with varying curing times (10-14 minutes).
Conclusions:
- Light- and heat-cured UDMA (Eclipse) exhibits superior mechanical properties over heat-cured (Meliodent) and auto-cured (Probase Cold) PMMA denture base systems.
- UDMA resins represent a promising alternative for fabricating durable and robust denture bases.
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