Romanian Journal of Oral Rehabilitation (Oct 2013)
RESEARCHES REGARDING THE BEHAVIOUR OF ACRYLIC RESINS VERSUS SILICONIC MATERIALS INVOLVED PROSTHETIC RECONSTITUTIONS
Abstract
The variety of facial traumatisms, the tumour pathology resulted in substance loss, are only part of the issues that leave their mark in a mutilating way upon the patients, modifying significantly and sometimes irreversibly their behaviour, from active and social to isolation, these aspects leading without a doubt to the need of diversification of the materials used in the prosthetics solutions for these clinical entities. This study is aimed at the improvement of the biomaterials used in the field of entirely removable prosthesis quality. The essential lucrative directions regarding acrylate and silicon materials with structural modifications and correspondent associations determine the elaboration of new prosthetic constructions that have an increased degree of comfort in comparison with present stomatologic solutions. A number of 19 test-tubes were made under the shape of thin, rectangular plates, 40mm long and 20mm wide and a depth varying from 1,8 to 2,5. Out of these, 14 traction test-tubes were realized with aluminium sticked (cyanoacrilate adhesive) ends. The trials were made with a HEKERT 50 machine (on a scale of 10 kN) and with a Textenser (maximum force of 500 kN). The polyethylene reinforcement is better than the metallic reinforced system, as the tension distribution is more uniform, with tension concentrators less powerful. Negative results from the Candida adherence point of view were found for test-tubes with AM88, M88 copolymers and for random and longwise arranged polyethylene reinforced test-tubes. These significantly negative results are based on the antibacterial effect of the two copolymers made at the Macromolecular Chemistry Institute „Petru Poni” in Iasi. The role of siliconic materials regarding the biologic integration is already known, but the structural modifications that we induced can meet high point in biocompatibility, chromatic range, and it is an essential condition for the overcoming of congenital or acquired facial flaws, reaching the state of reconstructive art.
