Dental Bridges are used to fill gaps permanently where teeth have been lost. Dental bridges can be explained as being just like a bridge across a river. There are two poles either side of a hanging structure. The poles are the teeth either side of the gap, which are crowned, and the hanging structure is the false tooth.
Depending on the size of the gap, Dental Bridges are a very successful fixed (meaning not removable like dentures) restoration. The idea is that the gap is filled with a structure that is indiscernible form the other teeth surrounding the structure.
In certain circumstances, implants are a better alternative to Dental Bridges. This may be because the gap is too wide. In this situation, too much force would be taken by the poles on either side, which could be detrimental to the longevity of the poles.