Do Ceramic Crowns Turn Yellow?
A dental crown is a popular type of treatment which can restore damaged teeth. There are a variety of uses for crowns such as restoring the function of the tooth, concealing minor cosmetic flaws, and protection of a damaged tooth. Over time, it is normal for crowns to have some discoloration, turn yellow, and begin showing signs of wear. A number of different things can damage the crown or cause this type of discoloration. In some cases, discoloration or damage can be reversed or treated.
Damage and Discoloration
When a crown is damaged, it is problematic as the underlying natural tooth can also experience damage. If a crown is discolored or yellow, it may be caused by the accumulation of plaque or debris. Routine brushing and flossing at home is not typically able to reverse this type of discoloration.
Professional Cleaning
Two materials commonly used to make a crown are ceramic and porcelain. Other materials may be at an increased risk for discoloration and staining. While porcelain and ceramic are more resistant to staining and discoloration, it is still possible. Tough stains which are present on the crown’s surface often do not respond to routine brushing. Other causes of staining in crowns may include things such as smoking cigarettes, consuming highly acidic foods, and alcohol.
A professional cleaning can often resolve these difficult stains. There are specialized tools which dental professionals can use to remove these stains and effectively clean the crown. These tools also ensure the crown is not damaged. Professional cleanings are often able to restore the white color of the crown and remove the yellow staining.
Whitening Treatment
Some patients who undergo whitening treatment may notice the crown is appearing darker in color or beginning to turn yellow. The crown’s coloring did not change but rather, the surrounding teeth are not whiter. This can result in the crown being a different color from the adjacent natural teeth. The dental professional may recommend completing whitening treatment prior to having the crown placed to ensure this does not happen.
Various things which can result in a ceramic crown turning yellow are summarized below.
Adjustments & Glaze
When adjustments are made to the crown, it is possible to damage the crown’s surface. The dentist will make modifications prior to placing the crown to ensure it is the correct shape, size, and fits in the mouth properly. In some cases, these adjustments damage the exterior glaze or the tooth’s surface. The crown can also become yellow if the lab fails to properly glaze the crown during fabrication.
Cleaning
When a patient receives a professional cleaning, it is possible to damage the crown. This may occur due to the use of power cleaning instruments which are combined with certain cleaning products. The glaze of the crown can be especially at risk for damage. It is also possible for certain fluoride treatments to damage the surface of the crown and result in the restoration turning yellow.
Other Materials
Materials other than ceramic or porcelain can also be used in the creation of a crown. For example, crowns made from composite materials can be at an increased risk for discoloration. Patients should work closely with the dental team to decide the best material for their crown. Materials have certain advantages and disadvantages which are important to consider.
Patients should contact the office if they have a crown which begins to turn yellow or show signs of discoloration. Patients may need to schedule an appointment to determine the cause. A crown is an investment and an excellent restoration option. When they are properly cared for, crowns should last for many years without any issues.