Aim: This article aims to review the studies on the bond strength between dental ceramics and metal restoration in crowns and bridges using various techniques. Methodology: Electronic databases for scientific research, including PubMed, Cochrane, and Medline, were searched. The following keywords were used: dental ceramic, cobalt-chromium (Co-Cr) alloy, shear bond strengths, Selective Laser Melting (SLM) technique, sandblasting technique, three-point bending test, hardness test, mode of failure, Scanning Electron Microscope (SEM) and roughness test. Initial retrieval of 86 original papers from the worldwide databases was done after careful screening, including reviews of the literature on the different techniques used to enhance the shear bond strength between dental ceramics and metal. 23 papers were finally chosen and examined since they satisfied all inclusion and selection requirements. Results: This review shows that airborne particle abrasion with Al2O3 is mostly used for mechanical retention, among many other techniques used in metal surface treatment. On the other hand, the laser etching technique provides a promising outcome in increasing the bond strength of ceramic to metal substructure. Conclusion: The microstructures and mechanical properties of Co-Cr dental alloys were dependent on the fabrication techniques, such as Selective Laser Melting (SLM) technique, sandblasting technique, and the laser etching technique. The SLM specimens exhibited better microstructures and mechanical properties than those fabricated with CNC or CAST.
