Kovalenko G. Development and clinical-technological substantiation of application of silicone impression material in functional impressions.

Dissertation is a personal scientific work. The author conducted a regional population study, performed clinical and technological evaluation of the quality of orthopedic constructions by the analysis of the early and long-term results of treatment; the author developed and improved dental materials. For the first time, the author developed and introduced algorithms to predict the quality of prosthetic constructions in different periods of their clinical use. The author improved the method of obtaining functional impression by mathematical substantiation of the sizes and numbers of perforations depending on the condition of the mucous membrane and alveolar ridge atrophy. For the first time, the author developed new target impression material, allowing correction of the degree of compression on the mucous membrane during obtaining functional impression, depending on its condition and on the type of atrophy of the alveolar process of the jaws. The physical and mechanical properties of C-silicone materials and their comparative evaluation were studied. For the first time, with the purpose of uniform distribution of chewing pressure under denture base, physical and mathematical calculations were applied, taking into account the value of the modulus of elasticity of the material, the pliability of the tissues of the prosthetic area and the minimum vertical displacements of the basis. The author substantiated and clinically tested the results of the use of an improved method of obtaining functional impression with the designed C- silicone material for functional impressions. The work has theoretical and practical significance in the field of clinical dentistry and dental materials. The practical value of the research is to improve the methods of obtaining functional impressions through mathematical substantiation of modeling and calculation of the area of the perforations in the individual impression tray; implementation of systematic approach to quality assurance in the orthopedic treatment with improvement of clinical laboratory technology of manufacturing dental prostheses, by substantiation, development and clinical application of the new impression materials with different viscosity. In particular, practically important is: - development and implementation of algorithms to predict the quality of the prosthetic constructions in different periods of their clinical use; - development and implementation of qualimetrical comparative analysis of new dental impression materials according indicators of international standards that is the basis for their composition; - elaboration of stages and algorithms of clinical monitoring of the quality of the dentures and the efficiency of orthopedic treatment according clinical and technological indicators in relationship to the indicative indicators of the state of the oral cavity; substantiation, development and clinical testing of new Ukrainian material for functional impressions that have been introduced into industry. The innovative methods of the evaluation of their clinical and technological quality have been offered, as well.