TY - JOUR AU - Dias, Sérgio Candido AU - Moysés, Marcos Ribeiro AU - Agnelli, José Augusto M. AU - Ávila, Gisseli Bertozzi AU - Ribeiro, José Carlos Rabelo AU - Pereira, Luciano José PY - 2016/01/21 Y2 - 2024/03/29 TI - Impact fracture strength applied to dental modeling materials JF - Brazilian Journal of Oral Sciences JA - Braz. J. Oral Sci. VL - 6 IS - 21 SE - Article DO - 10.20396/bjos.v6i21.8642989 UR - https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642989 SP - 1349-1352 AB - The aim of the present study was to analyze the impact fracture strength using plaster and resin modeling materials. The analysis was made using nine dies having plaster III bases and internal portion of laboratory-type addition silicone. Nine test specimens were produced of each following material: type IV Durone plaster, type IV Fuji Rock plaster, type IV Rock Plus plaster, type V Durone plaster, Epoxiglass 1504 epoxy resin, epoxy resin modified with diatomite and epoxy resin modified with diatomite. The tests were performed in a Ceast testing machine. At the moment of fracture, the machine recorded a value (Energy), using a formula to obtain the impact strength value in joules per meter. Statistical and variance analyses and Student’s t test revealed that pure or silanized diatomite increased the impact fracture strength of models made of Epoxiglass 1504 epoxy resin and that silanizing the filler led to a further gain in impact fracture strength. The models made of Epoxiglass 1504 displayed greater impact fracture strength than those made of plaster types IV and V. No statistically significant differences were found among the analyzed plasters. Models prepared with epoxy resin displayed in general greater impact fracture strength than models made of plasters. ER -