A crown is a kind of cap on a cracked, decayed, or broken tooth that strengthens and improves its appearance. This restoration covers the damaged tooth and restores it to its normal size and shape. Crowns can be made of metal, porcelain fused to metal, or a white porcelain material, and are necessary when a filling cannot solve the problem.

Types

Lava™ Porcelain crowns have the most natural look available while retaining the necessary strength. These crowns are made with a strong zirconia base that is covered in porcelain. Since the materials are white, these crowns have a very realistic appearance.

Porcelain fused to metal (PFM) is used occasionally in our office, when more strength is needed for the crown. Despite its prevalent use in other offices, the combination of metal and porcelain can cause a dark line on the tooth, which is why we generally use the all-white option.

Solid Porcelain crowns, which have no base material, are sometimes used in the front of the mouth. These crowns are more translucent and therefore can enhance a smile where there is not as much need for strength.

Gold crowns are very strong, which is why they are used for patients who have a habit of clenching or grinding their teeth. In spite of their strength, gold crowns do not have the appearance of natural teeth, so they are primarily on teeth in the back of the mouth.

Procedure

First, the dentist prepares the tooth by numbing it and removing decay or weak areas. The remaining tooth is reshaped so that the tooth-shaped crown will fit over it. Depending on the type of crown, a restorative material may be added to the tooth structure to ensure that the foundation of the crown will be strong. Next, an impression of the teeth and gums is made and sent off to the lab for the fabrication of the new crown. The dentist will place a temporary crown to ensure the safety of the tooth while the permanent crown is being made. At the next appointment, the dentist will place the crown and cement it onto the tooth.

Maintaining the restoration is very important. Crowns, when they are taken care of with good oral hygiene, can typically last 5-8 years and longer. However, teeth grinding and chewing on ice or hard foods may decrease the longevity of the crown. Brushing, flossing, and using interdental cleaners, which are specially shaped brushes, are all vital to maintaining the crown.