Inlays and onlays: the middle option between a filling and a crown
Not every damaged tooth needs a crown, and not every cavity can be fixed with a filling. An inlay is a custom-made ceramic piece that fits inside the chewing surface of a back tooth, where a filling would be too large to last. An onlay does the same and also covers one or more of the raised corners (cusps) of the tooth. Both are made to fit exactly and bonded in place.
The advantage over a crown is how much tooth is kept. A crown means trimming the whole tooth down all the way round. An inlay or onlay removes only the damaged part and the old filling, and leaves the healthy walls of the tooth standing. When enough sound tooth remains, that is the more conservative choice, and a tooth that keeps more of its own structure is generally easier to treat again in the future.
Like our crowns, inlays and onlays are designed from a digital scan and milled from a solid ceramic block in our in-house lab, usually in a single visit with no temporary and no second appointment. See same-day crowns for how that works.
Ceramic inlays and onlays are designed to be long-lasting; published studies commonly report most still in service after ten years or more, depending on the size of the restoration, the bite and how well the tooth is cared for. We will tell you at the examination whether a filling, an inlay or onlay, or a crown gives your tooth the strongest long-term outlook.