In some cases, your teeth may not be able to accept a traditional composite filling. This can be due to moderate decay that covers a wide portion of the tooth. For these situations, we recommend porcelain inlay or onlay restorations. Inlays cover the biting surface of the tooth inside the cusps, while onlays extend over the cusps. Both restorations are more structurally sound than large composite fillings, and generally don’t require an additional crown for support.