A bridge is just one of the options available for replacing missing teeth.
Your dentist may recommend a bridge if you have only a few teeth missing. It is important to replace missing teeth even if you are not concerned about your appearance because the gap allows the remaining teeth to drift out of position. This may eventually affect their function.
The teeth adjacent to the space are prepared as they would be for crowns.
The bridge is effectively a row of crowns connected together in one piece but made to look like individual teeth. Once the bridge is finished it is bonded on to the prepared teeth permanently to fill the space.
Bridges may be made from metal or they may be metal covered with a thin layer of porcelain to appear more natural. They may also be crafted entirely from porcelain by an experienced technician to produce a bridge that is very similar in appearance to your own teeth.