Tooth colored inlays and onlays are restorations used in dentistry to repair the teeth in the back of your mouth. Tooth colored materials, most commonly porcelain, are made in a dental laboratory and are designed to exactly fit your own tooth. They are firmly bonded to your tooth so that they restore the strength of the original tooth prior to the damage. They are the treatment of choice when the repair of your back tooth will involve more than half of the chewing surface.