Some flexural properties of a nylon denture base polymer

Area of Science:

• Biomaterials Science
• Dental Materials Engineering
• Polymer Science

Background:

• Poly(methyl methacrylate) (PMMA) is a standard denture base material.
• Nylon offers an alternative for patients with allergies to PMMA monomers.
• Evaluating material properties under disinfection is crucial for clinical longevity.

Purpose of the Study:

• To compare the flexural properties of a nylon denture base material with three types of poly(methyl methacrylate) (PMMA) polymers.
• To investigate the effect of an aldehyde-free, oxygen-releasing disinfectant on these flexural properties.
• To assess the suitability of nylon as a denture base material compared to PMMA.

Main Methods:

• Flexural modulus and strength were measured using a three-point bending test.
• Specimens were stored in 37°C water for 30 days.
• Half of the specimens were immersed in a disinfectant solution (Perform) for 24 hours before testing.

Main Results:

• Nylon showed a significantly lower flexural modulus than all tested PMMA materials.
• Nylon's flexural strength was lower than Meliodent and Acron MC PMMA but comparable to Lucitone 199 PMMA.
• Disinfection for 24 hours increased the rigidity (flexural modulus) of the nylon denture base material.

Conclusions:

• Nylon denture base material has inferior flexural properties compared to conventional PMMA.
• Disinfection may improve the mechanical performance of nylon denture bases.
• Nylon may be a viable alternative in specific clinical situations, considering its properties and response to disinfection.