Heat cured and self cured polymethylmetacrylate for interocclusal splints

Fit, retention and faults [cracks, voids, porosity] of maxillary splints were evaluated. Twenty five patients were selected for the study, for each patient, two maxillary splints were fabricated. One was fabricated using heat cured PMMA and the other was fabricated using self cured PMMA. The results of the study showed that, differences between the two materials were statistically non significant. The fit and retention of the splints were unaffected by the material use, Where splints are indented for long term use the advantages of the mechanical properties of heat cured polymethyl-methacrylate indicate that it should be the material of choice

Acrylic resin denture base materials: a comparative study

Some biological aspects have been investigated in this study. Five acrylic resin denture base materials were evaluated and Empress ceramic material was used as an additional comparative material. An epimucosal test plate that was carrying the test specimens was placed into the patient's mouth and was left for a certain period of time. Results of surface hardness showed remarkable changes during the epimucosal test, both DBF pumice polished and DBF high shine polished seemed to be the most stable materials. The moistening behavior of all the tested DBF specimens increased in the moist environment to the same level and those of Paladon were shown to be environmental dependant. The highest value of bacterial accumulation was recorded by Paladon 65