Effect of aging on Retention and flexural strength of different maxillary denture base material: In Vitro Study

Abstract

Background: the most commonly used treatment plane for edentulous patients is complete denture, many denture wearers complain from denture retention. Various materials have been used as a denture base to improve denture retention and denture base flexural strength. Nanoparticles was discovered that its inclusion as a reinforcing agent influences the physical properties of acrylic resins.Aim of the study: this comparative in-vitro study was done to compare retention of maxillary denture bases and their flexural strength using three different denture bas material.Material and methods: total number of 18 denture base was fabricated (six conventional base, six nylon denture base and six modified PMMA denture base), retention of the maxillary dentures was measured before and after thermocycling, 30 rectangular samples were fabricated from each material for flexural strength test. Data ware calculated, tabulated and statically analyzed.Results: results showed significant differences appeared between both polyamide and modified PMMA in comparison to conventional PMMA in both retention and flexural strength.Conclusion: modification of PMMA with nano-zirconia filler improved both fracture resistance and retention of denture bases.