Caracterización de la estabilidad dimensional de dos materiales de polimetilmetacrilato utilizados para elaborar platos bases en prótesis total

Abstract

The bases for acrylic prostheses are a big problem for both dentists and dental laboratories at the time of testing them in the mouth since after a while after elaboration they are normally maladaptive. To determine the dimensional change that occurs in the polymethylmethacrylate used to make base dishes, 20 samples were taken from the New Stetic commercial house (veracryl®) and 20 test samples from the Dismadet commercial house (Dymacril®), with measures of 2 cms wide x 3 cms long and 2mm thick. Each sample was placed on a glass sheet and a stereoscopic microscope was used to measure the separation between the two sheets. The results showed that for the two materials there was a large increase in the separation between the first and second day, with slight increases between days 2, 3 and 4 and a large increase between day 4 and 5; the separation value being greater for Veracryl acrylic In conclusion, it was observed that the two materials show a loss of stability depending on the time, especially after 24 hours and the Veracryl material was the one with the greatest stability.