Assessment of stress distribution around implant fixture with three different crown materials

Objectives: Selection of crown material should be based on patient bone status. Therefore three different crown materials (inceram e porcelain fused to metal crowns e Acrylic) were investigated in this study. Methods: A 3D finite element model was constructed under Finite element package environment for the upper first premolar. Different loading conditions (vertical and oblique) form 18 case studies were analyzed for comparison. Results: According to FEA results, changing crown material altered stresses and deformation values on cortical and spongy bones. Whereas linear static analysis results showed similar distributions, and safe values of stresses and deformations, that generated on all parts of the studied system. Conclusions: Using softer (lower rigidity) crown material reduces the stresses generated on the jaw bone (cortical and spongy), that it absorbs more energy from the applied load, and transfers less energy to the following parts of the system (implanteabutment complex and bones).