A bridge replaces 1 or more missing teeth by attaching artificial teeth to remaining natural teeth in the mouth. This often involves crowning teeth either side of the missing tooth & attaching a false tooth to the crowns.
Artificial teeth can sometimes be attached to natural teeth by cementing a false tooth with wings to the backs of 2 adjacent natural teeth. The advantage of this method is that it involves no destruction of natural teeth. This is called a rochette, or maryland bridge.