Ideal candidates for inlay or onlay work typically have too much damage or decay in the tooth structure to be successfully treated using a filling, but have sufficient healthy tooth remaining to avoid the need for a crown. This allows the dentist to conserve more of the patient’s original tooth structure.
There are other benefits to inlays and onlays in comparison to metal fillings:
Dental inlays and onlays are used when old fillings need to be removed or replaced. A dental inlay is similar to a filling and fits inside the cusp tips of the tooth. A dental onlay is more extensive and extends over the cusps of the treated tooth.
During treatment the dentist removes the old fillings and takes an impression of the tooth, which is sent to the dental laboratory. The new inlay or onlay is made from this mold in porcelain, gold or composite resin material. The inlay or onlay is then cemented into place at the next appointment. The inlay or onlay blends successfully with the treated tooth and the rest of the teeth to achieve a natural, uniform appearance.