Surface roughness analysis of temporary acrylic resin crowns submitted to different polishing methods

Abstract

This study evaluated the surface roughness of 90 specimens of acrylic resin (Denkôr™, VipiCor™ and Duralay™) submitted to mechanical (bench vise and “Sof-Lex™” abrasive disks) and chemical (polishing fluid at 75 ± 2 ºC for 10s) polishing methods. The surface roughness was measured using the Surftest SJ-201P™ roughness device in two transverse directions and six readings were done for each specimen. The two mechanical polishing methods used for the three acrylic resins demonstrated satisfactory results (Ra between 0,21 and 0,37 μm). However, only Duralay ™ presented proper smoothness surface when chemically polished (Ra = 0,66 μm). Key words: acrylic resins, temporary partial denture, crowns, dental polishing/ methods, surface properties.