Art and Science of Cast Metal Restorations

Cast metal restorations are indirect extracoronal and intracoronal restorations that have long been regarded as a reliable treatment option for the restoration of posterior teeth. Among them, cast metal inlays and onlays are particularly important because they provide a conservative approach to restoring teeth with moderate to extensive structural loss while preserving sound tooth tissue.Inlays are indicated when the damage is confined within the cusps of a tooth. They offer excellent marginal adaptation, superior proximal contacts, and greater longevity compared to large direct restorations. Onlays, on the other hand, are used when one or more cusps are weakened and require protection. By covering and reinforcing vulnerable cusps, onlays effectively distribute occlusal forces and reduce the risk of tooth fracture.The success of cast metal restorations is attributed to their exceptional strength, wear resistance, biocompatibility, and precise fit. These restorations have demonstrated outstanding long-term clinical outcomes.