Crowns are restoration that fully cover the entire tooth. Crowns are used to protect teeth from fracturing and breaking. Crowns are recommended when there isn’t enough tooth structure to support a filling, to protect a weak tooth from breaking, to attach a bridge and to restore a broken tooth. Crowns are made of porcelain, porcelain veneered onto metal or gold. The type of crown you need depends on the area it is in and aesthetics considerations.
A bridge is a fixed restoration that can be used to replace one or more missing teeth where implants are not a good option. A bridge attaches artificial teeth literally bridging the gap. Bridges can be made of porcelain, porcelain veneered onto metal or gold depending on where they are in the mouth and strength requirements.
By building the gap left by missing teeth, you alleviate the stress in your bite and help maintain the shape of your face.