Analysis of the capacity to reproduce details expressed by different modeling materials
Keywords:
Dental impression materials, Epoxy resinsAbstract
The aim of this study was to evaluate the capacity to reproduce the details present in the mold, using the following modeling materials: gypsite based stone plaster type IV, Durone, (Dentsply); Stone plaster type IV, Fuji Rock EP, (GC); Stone plaster type IV, Resinated Rock Plus, (Polidental); Stone plaster type V, Durone, (Dentsply); polymerous epoxy resins, Epoxiglass 1504, (Epoxiglass); and epoxy resin Epoxiglass 1504 modified with pure and silanized diatomite. The resin and its hardener were loaded with diatomite to a ratio of 30%. The diatomite was treated with Silane Silquest A 187, (Crompton S/A). The modified resin was manipulated to a ratio of 35%. Using the addition silicone President (light and heavy silicone Kit, Coltène), three moldings were made of a metal matrix with four rods containing dimensioned grooves. The test specimens were analyzed under an optical microscope at 40x magnification (Measurescope Nikon, from Nippon Kogaru K. K.). The results expressed by the plasters and resins were analyzed using the test of Variance and the Tukey test, and all results were considered significant upon reaching a level of significance of 5% (p<0.05). No statistically significant differences were found between the analyzed plasters and the resins. It could be concluded that loading the epoxy resin with diatomite, or with silanized diatomite, did not reduce its capacity to reproduce the details present in the mold. Furthermore, using this methodology, no difference could be found between type IV and V plasters and pure epoxy resin, or diatomite modified resin, in their capacity to reproduce details present in the mold.
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