Crowns are a cosmetic restoration used to strengthen a tooth or improve its shape. Crowns are most often used for teeth that are broken, worn, or partially destroyed by tooth decay.
Crowns are "cemented" onto an existing tooth and fully cover the portion of your tooth above the gum line. In effect, the crown becomes your tooth's new outer surface. Crowns can be made of porcelain, metal, or both. Porcelain crowns are most often preferred because they mimic the translucency of natural teeth and are very strong.
Crowns or onlays (partial crowns) are needed when there is insufficient tooth strength remaining to hold a filling. Unlike fillings which apply the restorative material directly into your mouth, a crown is fabricated away from your mouth. Your crown is created in a lab from your unique tooth impression which allows a dental laboratory technician to examine all aspects of your bite and jaw movements. Your crown is then sculpted just for you so that your bite and jaw movements function normally once the crown is placed.
Porcelain Veneers are used to modify the shape and colour of teeth. Veneers are thin shells of porcelain that are etched and then bonded to the enamel of the teeth. Tooth preparation is necessary to avoid over bulking of the tooth, but it is limited to the enamel and usually involves only a few surfaces of the tooth. Research has shown this style conservative treatment to a tooth restores its strength to that of an unrestored natural tooth.