Influence of Cement Thickness on the Polymerization Shrinkage Stress of Adhesively Cemented Composite Inlays: Photoelastic and Finite Element Analysis

The objective of this study was to analyze the effect cement thickness on strain and stresses resulting from polymerization resin using photoelasticity Finite Element Analysis (FEA). For study, twenty upper first premolars with inlay cavity preparation were constructed photoelastic restored composite inlay. samples divided into two groups (n = 10) according film material. Group 1, 100 ?m; for 2, 400 ?m. After cement, analysis finite element (FEA) performed. In analysis, 2 showed higher presence second-order fringe even after 24 h. formation order fringes not observed, FEA greatest cusp deflection tensile stress occurred in (0.00026 mm 0.305 MPa, respectively) due shrinkage lingual compared 1 (0.000107 0.210 respectively). It can be concluded that influences deflection, greater layer, deformations tooth structure occur.