Inlays and Onlays will typically be used when cavities on the chewing surface of rear teeth have become too severe to be treated with traditional fillings. The difference between an onlay and inlay is determined by the positioning of the damage in regards to the chewing surface of the tooth. If the damage is restricted to within the depression (within the cusps) of the tooth it is an inlay. If more extensive damage has progressed and the cusps must be recreated, it is an onlay. A single onlay can sometimes be used across multiple teeth.

Your onlay or inlays is created using gold, porcelain, or a composite resin colored to match your natural tooth. The latter two options are the most popular today due to their aesthetic appearance, but gold is still available. The making of these restorations is a two step process in which you will first have impressions taken of the affected area. Then the molds are sent to a dental laboratory where a skilled technician will oversee fabrication.