What is the minimum clearance required between tooth preparation and adjacent tooth for inlays and onlays?

The minimum clearance required between tooth preparation and adjacent tooth for inlays and onlays is typically 1 mm. This amount of space is necessary to accommodate the material of the restoration and to ensure that there is enough room for proper bonding and retention. Adequate clearance helps prevent issues such as damage to adjacent teeth and allows for effective oral hygiene post-restoration.

Inlays and onlays are indirect restorations that require precise fitting, and having sufficient clearance is crucial in order to avoid any potential irritation or interferences with adjacent teeth during chewing. A clearance of less than 1 mm could compromise the fit of the restoration, risking cement failure or secondary decay due to insufficient space for the bonding agent.

While some materials may have different requirements, the standard minimum of 1 mm is well-accepted in prosthetic dentistry. Therefore, achieving this clearance is fundamental for the long-term success of the restorations.