The effect of bone tissue density on the stress-strain state near dental implants

The dependence of the stress-strain state of the bone tissue on its density near the dental implant has been studied. The computations were performed by the boundary element method for the plane-deformed state of a model consisting of a cylindrical implant and surrounding bone tissues. Bone tissue is considered as an isotropic and homogeneous elastic material. Simulation the effect of bone density on the stress-strain state when applying a quasi-static load is performed by changing of elasticity modulus of the bone. It has been established that with the increasing in the spongy bone tissue elastic modulus, the maximum equivalent stresses in this bone tissue increase. Stresses in the cortical bone tissue decrease with the increasing in the spongy bone elastic modulus due to the decreasing in the load transferred to this bone part. Stresses in the spongy bone decrease with the increasing in the cortical bone layer elasticity modulus. The level of maximum stress in the cortical layer of the bone increases with the increasing of this bone tissue elastic modulus. The maximum of stresses in the cortical bone tissue are observed near the implant neck.