A crown is protective cover on a tooth (“cap”) that is fractured or weak.  Crowns are also used for teeth that are discoloured, malaligned or heavily restored.  Teeth that are root canal treated will often require a crown to strengthen the foundation of the tooth.  The crown can also enhance the esthetic value of the tooth by changing the colour and shape.  Implants are commonly restored with crowns as a separate procedure.  These crowns are attached to the implant either by cement or small screws.  The construction of the crown is performed a special dental laboratory.  Materials for crowns include a choice of precious metal alloys, all ceramic, or combined metal- porcelain.  

IMAGES OF CROWNS