Distribution of theMastication Force in the Bone Bed of Inclined Dental Implants in Relationto the Inclination, Type of the Surface and Level of the Alveolar Bone nearthe Cervix

Overview

Forces acting on the dental enosseal implant after loading by chewing lead toadaptation of his bone bed. Transmission of these forces depends on the characteristics of theused implant. At present mathematical modelling is the preferential method for the stressanalysis. 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 thevertical line in mesial and distal directions with bioinert and bioactive surfaces and with threevariations 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 arisingaround implants with the apex inclined distally can be more than double as compared with theapex inclined mesially. Similarly implants with a bioinert surface had double stress values ascompared with those with a bioactive coating. The level of alveolar bone around the implantneck influenced stress mostly in models with the apex oriented distally with inclination inhigher degrees.

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