Influence of different reinforcing materials on the rheology of provisional restorations.

Abstract

The effects of adding different ratios (0.5, 1, 5, 10, 20 and 40%) of zirconium oxide powder (ZrO) and ultra high modulus polyethylene fibers (PE) (0.5, 1, 2 and 4%) on the rheology mean value of autopolymerizing acrylic resin was investigated using Rotary Viscometer. Also the effect of temperature on the rheology mean values of reinforced acrylic resin were studied and analyzed. Mean values, student t-test and paired sample t-test also was analyzed. From our results it is obvious that the rheology mean value of acrylic resin (group I) is increased by increasing the ratio of ZrO. There is no significant difference between acrylic resin and group II (zirconium oxide group) at 0.5, 1 and 5% ZrO, but at 10 and 20% ZrO there is significant difference. For PE group (group III), the rheology mean value of acrylic resin is increased by increasing the ratio of PE from 0.5 to 2% when measured at different temperatures 20, 25 and 30 C. There is no significant difference between acrylic resin and group III at 0.5% PE, but at 1% and 2% PE there is a significant difference. In this study 40% ZrO and 4% PE had been eliminated from this study because the formed mixtures were friable and could not be molded. The rheology mean values were also affected by increasing the temperature from 20 to 30 C.