Sometimes it takes more than a filling to restore a tooth to optimal health. That’s when we might consider porcelain inlays or onlays as part of your dental restoration treatment plan. When decay has deteriorated most of your damaged tooth, a filling just won’t work. Unlike a composite filling, porcelain inlays and onlays are crafted from porcelain and are loved by dentists and patients alike because they actually strengthen the structure of your tooth while restoring form and function. The difference between an inlay and an onlay is quite simple. An inlay will fit neatly into a small cavity between the cusps of your teeth, while an onlay is larger and extends over the cusps similar to a tooth crown.