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.
Highlights
By biomaterial one may comprehend a synthetic material used to replace a part of a living system, or for the work in close relation with an alive tissue; biomaterial is "an inert substance from the point of view of systematic and pharmacology, set to be implanted for the coexistence of it, together with the systems of living." On the contrary, the biological material is a material such as would be the structure of the bone or tooth enamel, produced by a biological system
Samples of classic acrylate plus RUBBER 732 RTVsilicone, namely flexible acrylate and silicone followed the classic laboratory stages, special attention being paid to the proper choice of packing sinks, namely the mold.Their size( 1, 2) had the following parameters:.In view of conducting the comparative analysis of the tensile strength, classic and flexible acrylate test samples were used, respectively (Figure 1)
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 (Figure 4)
Summary
By biomaterial one may comprehend a synthetic material used to replace a part of a living system, or for the work in close relation with an alive tissue; biomaterial is "an inert substance from the point of view of systematic and pharmacology, set to be implanted for the coexistence of it, together with the systems of living." On the contrary, the biological material is a material such as would be the structure of the bone or tooth enamel, produced by a biological system. The main bio ceramics are used, in particular in dentistry: crowns tooth, for a particular aesthetics, resistance higher to compression and lack of reaction in the fluids of the body human [1]. Composite biomaterials are formed from two or more phase distinct, with properties different from the homogeneous material. The material for addition of a composite can have the form of particles, fibres, or strips [2]. In addition to the mechanical and chemical resistance, need not to contain toxic elements dispersed in the general movement, elements of potentially allergic, or the effect of carcinogenesis
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