Where should the margin be ideally located for an MOD restoration?

The ideal location for the margin of an MOD (mesial-occlusal-distal) restoration is supragingival. This positioning helps to ensure that the restoration is accessible for cleaning and maintenance, which is vital for long-term oral health. When the margin is supragingival, it allows for easier dental hygiene practices, as patients can effectively clean around the restoration without obstruction.

Additionally, a supragingival margin can reduce the risk of periodontal issues, as it keeps the margin away from the gum line, minimizing potential irritation or inflammation to the gingiva. It also creates a favorable environment for potential re-contouring of the soft tissues during healing after the restoration placement. Therefore, placing the margin supragingivally is commonly preferred to promote both restorative success and periodontal health.