While many people are good candidate for professional teeth whitening treatments, there are some situations where your dentist may advise against it, particularly if you have:
Gum disease. Gum disease exposes sensitive tooth nerves and tissues that can make whitening treatments painful. You may need to have your gum disease treated before you can whiten your teeth.
Tooth decay. Tooth decay or cavities will need to be treated before you can receive professional whitening treatment to protect the tooth—or teeth—from future damage, prevent further health problems, and restore the tooth’s full functionality.
Stains caused by antibiotic use. Tooth stains caused by some medications, such as tetracycline, cannot be removed with whitening, even professional teeth whitening. Your dentist may instead recommend veneers or other cosmetic or restorative procedures to brighten your smile.
Sensitive teeth. The high concentration of chemicals in professional teeth whitening can further irritate sensitive teeth and gums. Your dentist may recommend that you begin using sensitivity toothpaste or receive fluoride treatment before having your teeth whitened to help minimize discomfort.
Restorations. Restorations like bonding, bridges, crowns, or implants will not respond to professional teeth whitening, making the restoration stand out more in contrast to your natural teeth.