Inlays and Onlays are indirect fillings, which means they are fabricated in a laboratory and cemented onto the patient’s tooth. Inlays are made of tooth-colored materials such as ceramic or porcelain or some dental composite. They can be used to restore cavities in the teeth.
Onlays, on the other hand, will be extended to the chewing surface of the back teeth to replace one or more cusps. Onlay filling is also made of tooth-colored materials and will strengthen the tooth. People with mild to moderate tooth decay or damage would be recommended for inlay and onlay.