These are considered as indirect fillings meaning that they are fabricated outside the mouth, generally at dental lab and then bonded to the tooth by a dentist. It is considered an “inlay” when it fits within the tooth(premolar or molar). It is an “onlay” when it covers one or more of the cusps. Either way, the procedure for placing an inly or onlay is the same. These are strong, long lasting and require no greater level of care than any other tooth. For restoration to last long for years, one should do brushing and flossing alongwith regular professional cleanings at the dental office.