الفهرس 
The surface roughness of rapid heat cured acrylic resin versus modified conventional acrylic resin with titanium dioxide nanoparticles in maxillary single dentures :A randomized clinical trials
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Abstract
Aim of the study: In vivo study was conducted to compare the effect of two different denture base materials (rapid heat cure acrylic resin and modified rapid heat cured acrylic resin with titanium dioxide nanoparticles) on the surface roughness of the maxillary complete denture. Materials and methods: Twelve patients with completely edentulous maxilla were randomly selected according to inclusion and exclusion criteria, primary impressions were made using irreversible hydrocolloid, secondary impressions were made using green stick compound as a border molding material and Zinc oxide/eugenol as a final wash impression material then the master casts were duplicated using duplicating silicone, both dentures were processed in boiling water for 20 minutes, each patient received two dentures; rapid heat cured acrylic denture base and modified rapid heat cured acrylic denture base with titanium dioxide nanoparticles then surface roughness was measured using stylus profilometer device. Results: Showed that there was no statistically significant difference between the two types of denture base materials: the rapid heat cured acrylic resin and the modified rapid heat cured acrylic resin with titanium dioxide nanoparticles. It was concluded that addition of titanium dioxide nanoparticles will not affect the surface roughness of the complete dentures