Effects of cement properties on stress distributions at the dentin-cement-post interfaces have been studied using 3D explicit finite element simulations. The mastication and horizontal loadings are simulated with titanium and glass fiber posts. Different type of cements (moduli 2,8,18 and 22 GPa) is considered to study the interface stresses. The interface stresses are evaluated at dentin-cement-post interfaces and along the surface of the post and cement. The element deletion technique from finite element analysis has been used to predict the cement failure. The simulation results suggest that the cement with similar modulus as dentin is preferable to avoid the stress concentration at the dentin-cement interface. The types of cement do not affect the failure initiation location on the cement. Under the simulated conditions, the failure initiation is located at 1.7 to 2.2 mm from the post apex.