The crown of a tooth is the portion that is covered by enamel. A restorative crown replaces this outer part to protect the tooth. This protection becomes necessary when a tooth cracks or has its entire structure weakened by decay. As with a filling or inlay, the dentist first removes the decayed portion of the tooth. The tooth is then prepared for a crown. It may be tapered on the outside edges to a peg, reinforced with a cast metal core, or rebuilt with both a cast metal core and a post. A wax impression of the prepared tooth and the teeth next to it is made. The new crown is made to fit this mold. The crown may be made of gold or stainless steel alone, metal with a veneer of tooth-colored porcelain or resin, or of porcelain or resin alone. The finished crown is then placed over the prepared tooth, adjusted, and cemented into place.
Porcelain Crowns can look very natural and are mostly used on front teeth and on people that do not grind their teeth. Metal-based crowns have traditionally been used to strengthen or rebuild teeth that are heavily worn, but these were not very aesthetically pleasing. Now, with the latest advancements in cosmetic dentistry, porcelain crowns can now look much better than your original teeth.