Abstract
Polymethyl methacrylate (PMMA) has been widely used as a denture foundation material even though it does not have enough flexural strength. Hence, the flexural strength of heat-cured PMMA has been tested by incorporating polyethylene and polypropylene fibers in an in vitro experiment. The experiment on 120 controlled specimens was carried out via a three-point bending test. Results showed significant improvement with both fibers, with polypropylene (169.61 ± 16.30 MPa) providing superior reinforcement compared to polyethylene (129.29 ± 5.00 MPa) and control (99.91 ± 3.79 MPa) (p < 0.001). Thus, we show polypropylene fiber reinforcement as an effective approach to enhance the mechanical performance and longevity of PMMA dentures.