Abstract
Achievements in the field of biomaterials have as a basis three scientific domains: chemistry, biology and physics, then the technical application or the putting up culminating with clinical achievements. Dental prostheses, regardless of their type, replaced the lack of teeth. Although, mainly, many people that lost their teeth could continue life with the help of prostheses in a way pretty decent, dental prostheses shows some disadvantages that make them even unbearable for some people. The study aims at analyzing the biological behavior of sandwich type structures that reunite the classic acrylate and a silicone layer, namely the Flexite type elastic acrylate. We used a silicone material, RUBBER 732 RTV, which is frequently used in mucous-bone support deficits, especially in oral maxillofacial surgery post interventions. The tensile strength was tested ona TEXTENSER traction test machine, in view of establishing the chemical analysis of the 2 materials used. Regarding the maximum tensile strength for sandwich-type test samples, the flexible acrylate - silicone RUBBER 732 RTV structure broke at 1125N, while for the classic acrylate – silicone material a fracture value of 950N was recorded. The structure of the two biomaterials within the sandwich type test samples decisively influences the force and tension at which the fracture occurs, as well as the fracture route, which is linear, without the displacement of fragments, both the flexible acrylate and the silicone being affected, respectively a linear route at the level of the acrylic structure, affecting the acrylate – silicone interface for the classic acrylate – silicone test samples.
Keywords: biomaterials; biocompatibility; acrylic protheses; pattern