Comparison of Color Stability in Provisional Restorations Fabricated by Two Different Acryls in Different Solutions

The fabrication of provisional fixed restorations is one of the most important steps during a fixed prosthesis treatment. In cases which provisional prosthesis are required for a period longer than 14 days, discoloration is more critical. Due to the production and popularity of using Acropars acrylic resin for fabricating provisional prosthesis in the country, the comparative evaluation of color change of Iranian (Acropars) and Foreign (Trim) acrylic resins used for provisional restoration was conducted in an In vitro environment.

A total of 64 disc-shaped samples (32 samples for each type of resin) were prepared. The color characteristics of the samples were measured at baseline, before their exposure to 4 types of color solutions and the changes after exposure to the dye solutions (10, 20 and 30 days after exposure) were determined by the spectrophotometer.

The mean color difference (ΔE*) in Iranian acrylic resin in different solutions was in the unacceptable range and mean color difference (ΔE*) for Trim acrylic resin was in the acceptable range.

Acropras acryl underwent more discoloration compared to trim acryl