Finite element method for the study of stresses in the implant and the surrounding bone in improving the quality of treatment of complete adentia

Abstract

Summary. This article presents the results of biomechanical analysis with the creation of a model in a finite element complex. The dependence of the results of orthopedic treatment or removable dentures on the position of 4 implants in the jaw, the angle of their installation and the length of the cantilever protrusion of the beam nozzle was revealed. The used methods of computer modeling based on finite element software systems make it possible to create models for preliminary planning of dental implantation and subsequent removable prosthetics, with the help of which it is possible to develop recommendations for the use of a particular model. The finite element method can identify structural types that are not effective enough for practical use, which is possible after determining the zone or areas, for example, the lower jaw with dental implants with a high concentration of stresses or a high level of stress. The parameters of tensile stresses in the cortical bone tissue surrounding the implants under certain loads under the conditions of mathematical modeling by the finite element method by groups have both similarities and differences. With a chewing load of 100 N, sharp fluctuations in cortical bone stress depended on the direction of the load and the location of the implants. Statistical analysis of the data obtained shows that removable dentures on the lower edentulous jaw, installed on 4 implants, give positive results when using the implant positioning system and some dimensional parameters presented in models 3, 4, 5. Key words: implant, removable prosthesis, beam system, stresses in the cortical bone, finite element method.