A crown is a permanent covering that fits over an original tooth that is either decayed, damaged or cracked. Crowns are made of a variety of different materials such as porcelain, gold, acrylic resin or a mix of these materials. Porcelain generally has the most natural appearance, although it is often less durable.
The treatment plan for a patient receiving a crown involves:
- Numbing the tooth to remove the decay in or around it.
- Re-sculpturing the tooth to provide an ideal fit for the crown.
- Making an impression of your teeth in order to create a custom-made crown (usually takes one to two weeks).
- Making a temporary crown out of acrylic resin and fitting it onto the tooth during the interim period when the permanent custom-made crown is being created.
- Applying the permanent crown (when received from the lab) by removing the temporary crown and fitting the permanent one onto the tooth.
- After ensuring that the crown has the proper look and fit, the dentist cements it into place.
A bridge is similar to a crown. It is a group of crowns linked together that fills a space that a tooth previously occupied.
Bridges can be used to prevent the following:
- Shifting of the teeth that can lead to bite problems (occlusion) and/or jaw problems and resultant periodontal disease.
- Bridges safeguard the integrity of existing teeth and help maintain a healthy, vibrant smile.
- Fixed bridge – this is the most popular and consists of a filler tooth that is attached to two crowns, which fit over the existing teeth and hold the bridge in place.
- The “Maryland” bridge is commonly used to replace missing front teeth and consists of a filler that is attached to metal bands that are bonded to the abutment teeth. The metal bands consist of a white-colored composite resin that matches existing tooth color.
- The Cantilever bridge is often used when there are teeth on only one side of the span. A typical three-unit cantilever bridge consists of two crowned teeth positioned next to each other on the same side of the missing tooth space. The filler tooth is then connected to the two crowned teeth, which extend into the missing tooth space or end.