Teeth whitening has become one of the most popular cosmetic dental treatments today. From over-the-counter strips to in-office professional whitening, people are eager to brighten their smiles. While whitening treatments can be safe and effective when used properly, they’re not suitable for everyone, especially those with untreated cavities. In fact, whitening your teeth while you have cavities can lead to discomfort, damage, and more serious dental issues. Here’s why this combination is a risky one and what you should do instead.
What Happens During Teeth Whitening?
Teeth whitening products typically contain hydrogen peroxide or carbamide peroxide as the active ingredient. These chemicals penetrate the enamel and break down stains within the tooth, leading to a brighter appearance. While this process is generally safe for healthy teeth, it becomes problematic if the tooth structure is already compromised, such as in the case of cavities.
Why Cavities and Whitening Don’t Mix
A cavity is essentially a hole or weak spot in the tooth caused by decay. This decay breaks down the enamel and dentin, leaving the inner part of the tooth vulnerable. When you apply whitening agents to a tooth with a cavity, the chemicals can seep into the deeper layers of the tooth, reaching the nerves and pulp. This can lead to increased sensitivity, pain, and even irreversible nerve damage.
Additionally, whitening products are not designed to disinfect or repair tooth decay. Applying them over cavities does nothing to treat the underlying issue, and may even mask it temporarily. As a result, the cavity can worsen unnoticed, potentially requiring more extensive treatment like a root canal or extraction.
Increased Tooth Sensitivity
Even individuals with healthy teeth sometimes experience sensitivity after whitening. For those with cavities, this sensitivity can be severe. You may experience sharp pain when eating or drinking hot, cold, or sweet items. This discomfort can last long after the whitening process is completed and may require professional intervention.
Risk of Gum Irritation and Inflammation
Whitening products that come into contact with the gums can cause irritation. If you already have cavities near the gum line or gum disease, the chemicals in whitening agents can exacerbate inflammation and lead to more discomfort. This is particularly true with at-home whitening kits, where trays or strips may not fit properly and allow the gel to leak onto sensitive areas.
What You Should Do Instead
If you’re considering teeth whitening but suspect you have cavities, or haven’t had a dental exam in a while, it’s essential to schedule a visit with your dentist first. A thorough examination will reveal any decay, gum disease, or other issues that should be treated before whitening. Your dentist can then recommend the safest and most effective whitening method for your unique dental health.
In many cases, treating the cavity and restoring the tooth (with a filling, crown, or other method) can also improve the overall appearance of your smile. Once your mouth is healthy, whitening treatments can be performed safely and with better results.
Whitening your teeth while you have untreated cavities is more than just ineffective – it’s dangerous. The key to a bright, healthy smile is not just whiter teeth, but well-maintained oral health. Always consult your dentist before beginning any whitening regimen to ensure you’re a safe candidate and to avoid painful complications.
About the Author
Dr. Natalya Ramsay earned her degree in General Dentistry at the Oregon Health and Science University School of Dentistry and regularly continues her education in the latest skills, procedures, and equipment in oral healthcare. She is also a part of the Medical Teams International Dental Van, which provides mobile care for low-income patients in need. If you’re ready for a brilliant new smile, Dr. Ramsay and our team offer both in-office and take-home whitening treatments designed to strengthen enamel as it whitens! Schedule your appointment today online or call our McMinnville office at (503) 472-1402.