Forces acting on the dental enosseal implant after loading by chewing lead to adaptation of his bone bed. Transmission of these forces depends on the characteristics of the used implant. At present mathematical modelling is the preferential method for the stress analysis. Stress computations were made by the finite-element method using a simplified 3D model of implant of common size inserted into the model of the bone at various angles to the vertical line in mesial and distal directions with bioinert and bioactive surfaces and with three variations of bone level around the implant neck. Chewing was simulated by forces of 17.1 N, 114.6 N and 23.4 N, in a vestibulo-oral direction, axial direction and disto-mesial direction, respectively. Reduced von Mises stress values were computed. Results show, that stress arising around implants with the apex inclined distally can be more than double as compared with the apex inclined mesially. Similarly implants with a bioinert surface had double stress values as compared with those with a bioactive coating. The level of alveolar bone around the implant neck influenced stress mostly in models with the apex oriented distally with inclination in higher degrees.

        Key words: dental implants – inclination of enosseal part – stress distribution – finite element method