Flexural strength of modified and unmodified acrylic denture base material after different processing techniques.

Area of Science:

• Materials Science
• Biomaterials Engineering
• Dental Materials Science

Background:

• Conventional heat-cured acrylic resin is a widely used denture base material.
• Modifications and novel processing techniques aim to improve its mechanical properties.
• Flexural strength is a critical property for denture base materials.

Purpose of the Study:

• To compare the flexural strength of modified and unmodified denture base acrylic resins.
• To evaluate the effect of different processing techniques (water bath, dry oven, air circulating oven) on flexural strength.
• To assess the efficacy of an air circulating oven as a novel processing method.

Main Methods:

• Fabrication of 114 rectangular specimens from conventional and rubber-reinforced acrylic resins.
• Processing specimens using water bath, dry oven, and air circulating oven methods.
• Testing flexural strength via a three-point bending test using a universal testing machine.

Main Results:

• All processing techniques significantly impacted flexural strength (p < 0.001).
• Water bath processing resulted in the highest flexural strength for both acrylic resin types.
• MPa was the unit for flexural strength measurement.

Conclusions:

• Water bath processing is optimal for achieving superior flexural strength in both conventional and rubber-reinforced denture base acrylic resins.
• Air circulating oven processing offers acceptable flexural strength for conventional heat-cured acrylic resin.
• The study introduces and evaluates the air circulating oven as a viable processing technique.