Salivary pH influence on mechanical and surface properties of high-impact acrylic denture resin

TL;DR

This study shows that adding polypropylene fibers improves the strength of denture material more than polyethylene or no fibers.

Contribution

The novel finding is that polypropylene fibers significantly enhance the flexural strength of PMMA denture resin.

Findings

Polypropylene fibers increased flexural strength to 169.61 MPa, outperforming polyethylene and control groups.

The improvement in mechanical performance suggests better durability for PMMA dentures with polypropylene reinforcement.

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.