Bridges refer to a restoration that is fitted when a tooth is missing. It provides a false tooth, fixed in position by attaching it to an adjacent tooth or teeth. Bridgework requires the adjacent tooth or teeth to be trimmed similar to how a tooth is prepared for a crown. The bridge then consists of 'linked' crowns, holding the false tooth in place. This type of bridge is strong, but disadvantages include having to prepare the adjacent teeth and long term cleaning.