Abstract
Recently, yttrium oxide-stabilized tetragonal zirconia polycrystalline (3Y-TZP) have been introduced in prosthetic dentistry to be used as all-ceramic fixed prostheses core. Despite its good mechanical properties, during sintering of venner ceramic, an inadequate cooling rate or a thermal mismatch between venner ceramic and 3Y-TZP can cause problems such as chipping and fracture of venner…