AVALIAÇÃO DA RUGOSIDADE DA RESINA TERMOPLÁSTICA FLEXÍVEL EM COMPARAÇÃO À RESINA ACRÍLICA TERMOPOLIMERIZÁVEL, APÓS IMERSÃO EM BEBIDAS PIGMENTADAS: ESTUDO IN VITRO

Abstract

Dental prosthetics aim to replace lost teeth and soft tissue, restoring aesthetics and functionality to partially or completely edentulous individuals. Thermopolymerizable acrylic resin associated with a metallic substructure is the most used material for the manufacture of removable partial dentures, despite the advantages, the metallic clips used to retain the prostheses are one of the main complaints from users due to unfavorable aesthetics. As an alternative to conventional materials, new materials have been developed and studied, one of which is flexible thermoplastic resin based on polyamide, which is aesthetically superior as it does not have conventional metal clips. Time and some substances can lead to changes in some surface properties of the prosthesis' polymeric materials, such as surface roughness. These changes can lead to the adhesion of pigments and microorganisms to the PPRs. Some everyday pigmented drinks have little study relating their consumption to the changes they generate in this property and this work analyzed the effects of coffee and yerba mate (tereré), on the roughness of conventional and thermoplastic resins, after immersing 60 test specimens. in each of these substances, simulating the daily intake of such drinks. The results showed different levels of roughness between the two materials even without immersion and after immersion, the substance that demonstrated a significant increase in the surface roughness of the test specimens was yerba mate (tereré).