The Truth About Teeth Whitening

Walk down any pharmacy aisle and you will find dozens of teeth whitening products — strips, trays, toothpastes, LED kits. The marketing is compelling. The results, unfortunately, rarely match the promises. Understanding what whitening actually does to your teeth can help you make a safer, more effective choice.

Tooth discoloration comes in two forms: extrinsic staining (on the surface, from coffee, tea, wine, tobacco) and intrinsic staining (within the tooth structure itself, from aging, certain medications, or trauma). Most over-the-counter products address only extrinsic staining, and only modestly — their peroxide concentrations are limited by regulation to protect consumers from misuse.

Professional whitening uses pharmaceutical-grade concentrations of hydrogen or carbamide peroxide, applied under clinical supervision. Before any treatment, we evaluate enamel thickness, gum recession, existing restorations (which will not whiten), and the nature of the staining to determine if whitening is appropriate and what results to expect.

Sensitivity during and after whitening is common but manageable. Professional protocols include desensitizing agents and post-treatment recommendations that minimize discomfort. Over-the-counter products, used without guidance, can be applied too frequently or for too long — increasing sensitivity and the risk of enamel erosion.

The short answer: professional whitening delivers better, safer, more predictable results. It is not for everyone — patients with intrinsic staining, significant crowns or veneers, or active gum disease may not be suitable candidates. A consultation with our team will give you an honest assessment of what is achievable for your specific smile.