What is the difference between Inlays, Onlays, and Crowns? They all strengthen and repair a damaged tooth, but generally, the type of restoration we use is determined by the extent of the damage. Inlays - Inlays are used when a cavity has grown too big to be treated with a traditional filling. Made of porcelain and milled to perfectly fit your tooth, the inlay lies within the cusps of the [...]