Crown: Badly decayed or weakened teeth often require further treatment than normal fillings. Crowns or caps can strengthen such weakened teeth. A crown is an artificial restoration that fits over and entirely covers up the remaining part of a prepared tooth, making it strong and giving it the shape of a natural tooth.
Bridge: When one or more teeth are missing in the oral cavity, the remaining natural teeth tend to shift out of their normal position. These shifted teeth are often more difficult to clean as a result they are more susceptible to decay or gum diseases. Shifting of teeth will lead to changes in the bite, which often put stress on the teeth, muscles and jaw. Ultimately, the ability to chew comfortably may be affected. A fixed bridge can restore your teeth to normal functioning by replacing missing teeth. That helps improve the entire health of your mouth by keeping the surrounding teeth in position, and can also help maintain the structure of your face and jaw.
In this era of cosmetic dentistry Crowns & Bridges made with Ceramic or Zirconia (Strongest) like tooth colored material, can be as pleasing aesthetically as they are functionally.