“A Comparative Evaluation Of Bond Strength Of Veneering Porcelain To Zirconia And Metal Cores – An In Vitro Study”

Abstract

For the past forty years, the porcelain-fused-to-metal systems have been extensively used in fixed partial dentures (FPDs) and still represents the gold standard. The PFM systems have the advantage of integrating the metal substructure's fracture resistance with the porcelain's aesthetic property. However, the growing demand for attractive restorations, combined with concerns about the biocompatibility of various dental metal alloys, has hastened the development and improvement of metal-free restorations.1
While veneering zirconia frameworks with ceramics has enhanced aesthetic appeal, the core-veneer interface is a pain because it leads to ceramic chipping and cracking, which is one of the weakest parts of zirconia-based restorations. The zirconia framework, unlike metals, has a higher hardness, which causes more catastrophic stress to build in the veneer layer of zirconia-based restorations. In this regard, the veneering ceramic's strength is a significant feature for long-term clinical success. 2