Onlays porcelain are designed to treat decay within the cusps of a tooth, that extends to one or more of the cusps. Onlays are placed in much the same way as inlays. Onlays can be created from tooth-colored porcelain material, which makes them undetectable to the naked eye. They also help to conserve more tooth structure because their use requires minimal removal a tooth’s surface. Perhaps their most important benefit, however, is that, in saving damaged teeth, onlays help patients avoid the eventual need for more extensive treatment with dental crowns, dental bridges, or dental implants.