Estudio comparativo in vitro del efecto de almacenamiento nocturno en la rugosidad superficial de las bases protésicas elaboradas con resinas acrílicas termopolimerizables

Abstract

Objectives: To compare the effect of night storage in dry and aqueous medium on the surface roughness of the prosthetic bases made with thermopolymerizable acrylic resins. Materials and methods: The present study is of quantitative type. Results: Comparing the measurements of basal surface roughness of the acrylic disks of both injection molding and conventional when finished and polished, it was observed that the discs with the lowest surface roughness presented were those produced by the injection technique. Comparing the measurements of surface roughness before and after the night storage in the discs of injected manufacturing showed that those stored in aqueous medium had lower surface roughness than those stored in dry medium, which presented an increase in surface roughness before and after of its storage. For the conventionally manufactured disks there were no statistically significant differences between the measurements before and after the aqueous and dry overnight storage. Conclusions: When comparing acrylic disks according to their manufacturing technique, it was found that the acrylic disks made with the conventional technique have a higher surface roughness subsequent to their elaboration than the acrylic disks manufactured by the injection technique. The acrylic disks manufactured by injection technique and stored in aqueous medium show a decrease in their surface roughness. In the conventional fabrication technique for the production of full dentures, the storage medium is not an important factor that alters the roughness of the surface.