Nicotine and tar penetrate enamel and dentin over time. The staining is both extrinsic and intrinsic, and it typically requires a stronger treatment approach than diet staining.
Dentist-dispensed trays or professional in-office whitening usually produce the best result for heavy smokers. Consumer strips help but rarely restore fully.
A small independent editorial team that reads the primary literature so readers do not have to. Every article is cross-checked against ADA, NIH/NIDCR, and Cochrane Oral Health published guidance before it ships.
Ira Zoot is not a licensed dentist or clinician. As the site's independent editorial reviewer, Ira reads every page before it ships and cross-checks the underlying claims against published guidance from the American Dental Association (ADA), the U.S. National Institutes of Health / NIDCR, and Cochrane Oral Health reviews. Any clinical decision should still be made with your own dentist.