A dental crown is a cap which is placed over a tooth. Crowns are commonly used to correct cosmetic flaws and restore the shape, size, and strength of the tooth. Crowns are cemented in place and completely cover the tooth from the gum line to the biting surface.
It is common for the dentist to suggest the use of a crown in the following scenarios:
1. Cover large fillings and support teeth
2. Dental implants
3. Enhance discolored or misshaped teeth
4. Cosmetic enhancements
5. Protect a weak tooth and prevent breakage
6. Restore the functions of a tooth which has severe wear
7. Secure dental bridges
Preparation
The initial step of placing a crown involves preparing the natural tooth which will support the crown. Preparing a tooth for crown typically requires two separate visits. During the first step, the dentist will complete an examination and prepare the effected tooth. The second step will include the actual placement of the crown.
The initial visit for a crown will often include an X-ray which is used to assess the bone and roots of the tooth where the crown is being placed. When the tooth has significant decay or is at high risk for infection, the dentist will often suggest a root canal. If the tooth has issues following the placement of the crown, the crown will need to be removed and the tooth may require extraction.
Before placing the crown, the affected tooth and surrounding gum tissue will be numbed. The dentist will then file down the edges and chewing surface of the tooth to prepare it for placement of the crown. The type of crown being used will dictate amount of tooth which requires removal. When the patient is missing a large portion of the tooth, the dentist will typically place a filling so that tooth can support the crown. This is common for teeth with significant damage or decay.
After preparing the tooth, the dentist will take an impression of the tooth. An impression is also taken of the surrounding teeth to ensure the patient’s bite is preserved.
The impressions are then shared with the dental lab which is creating the crown. In most cases, the crown will be ready in two to three weeks. The dentist will select the shade which matches the natural teeth when the crown is made from porcelain. A temporary crown is often used while the permanent crown is being prepared. Temporary crowns are often made from an acrylic material and secured with cement.
Permanent Crown
Once the permanent crown is ready, the dentist will remove the temporary crown. They will then evaluate the fit and color of the permanent crown. The dentist can make any necessary adjustments or work with the lab to adjust the color, if needed. Once the permanent crown is ready, the dentist will secure it in place with a cement.
Dental crowns typically last about 5-15 years, or more. The lifespan of a crown can be impacted by factors including the location, patient’s oral hygiene, and personal habits like teeth grinding or chewing ice. Crowns are an excellent solution for patients who are looking for a treatment to restore the appearance and function of a natural tooth. Follow up with your dentist to determine if you are a good candidate for a dental crown.