A crown is made to cover the tooth.
A crown is required if tooth is damaged with decay, if the tooth is having big filling bigger than tooth structure, in root canal treated teeth to protect the tooth fracture as usually tooth will be brittle as its non vital , for aesthetic reasons to hide stains and irregular shape etc.
A bridge is made to replace one or more missing teeth .It is a good permanent solution to replace teeth if patient don’t adopt implant for the same. It is necessary to replace missing teeth to restore the normal function of teeth and also to prevent moving of remaining adjacent teeth to the vacant space causing gaps between teeth. Opposite jaw teeth can also grow to the vacant space.
Different types of crowns and bridges are available like metal ceramic, full ceramic ( emax , zirconia) etc.
Patient can choose according to the aesthetics and budget.