What is a contraindication for cast gold inlays?

The identification of a MOD (Mesio-occluso-distal) restoration as a contraindication for cast gold inlays stems from the structural and functional considerations associated with preparing teeth for such restorations. MOD restorations involve a larger portion of the tooth, compromising the remaining tooth structure significantly. When there is extensive loss of tooth material, such restorations can lead to issues such as decreased tooth strength and increased risk of fracture.

Cast gold inlays, while strong and durable, require a certain amount of remaining tooth structure to ensure proper seating and support. In instances where a tooth is prepared for a MOD restoration, the preparation may lead to an undermining of the tooth structure, making it less suitable for an inlay that depends on the integrity of the tooth for its retention and strength.

Conversely, MO (Mesio-occlusal) restorations and requests solely for gold instead of amalgam do not inherently present the same level of concern regarding the structural integrity of the tooth being restored. Additionally, the size of the teeth themselves does not inherently rule out the use of cast gold inlays but can vary based on the overall treatment plan and design of the restoration. Therefore, the specific challenge associated with MOD restorations makes them a contraindication