Influence of Cavity Geometry on the Fracture Strength of Dental Restorations: Finite Element Study

The main purpose of this work was to analyze the stress distribution in premolars restored with indirect IPS Empress® CAD onlays or inlays. three-dimensional geometry a human first premolar created using modeling software. tooth fixation system simulated through box geometry, comprising cortical bone layer 2 mm thickness over trabecular 15 thickness. had following approximated crown dimensions: 10.35 buccolingual length; 7.1 mesiodistal width; and 7.0 cervico-occlusal height. mesio-occluso-distal (MOD) cavity preparations followed suggestions available literature. cement modified include cohesive zone models (CZM) perform adhesive joint’s strength prediction. loading body assuming contact between food bolus surface. Numerical solutions were obtained by performing static analysis damage finite element method. Von Mises values generated ceramic inlay restoration ranged from 1.39–181.47 MPa, which on average 4.4% higher than those onlay restoration. fracture about 18% that design seems contribute homogenization resin strain structure protection.