Frequently Asked Questions About Teeth Whitening

Professional teeth whitening (bleaching) does not damage enamel when performed under a dentist's supervision; the gels used break down trapped color pigments without altering the enamel's structure.

Price differences between clinics mainly come down to the quality of the gel used, the technology applied (laser or special light systems), and the dentist's experience in the field. Cheap, uncontrolled applications can cause irreversible enamel damage and severe sensitivity.

Pain is rarely felt during the procedure, but mild sensitivity in the 24-48 hours afterward is normal. Special desensitizing gels make this period more comfortable.

How long whitening lasts depends on the individual's habits; with good oral care and adherence to a 'white diet,' the effect typically lasts 1-2 years. Tea, coffee, and smoking can shorten this period.

Over-the-counter whitening products contain much lower concentrations of active ingredients, so they only lighten surface stains; because their trays don't fit precisely, the chemicals can also leak onto the gums and cause irritation. In-office treatment, by contrast, delivers safe, controlled, and deep results.

Most patients achieve their desired result in a single in-office session (45-60 minutes); very dark or antibiotic-related stains may require a second session or supplemental at-home whitening. Getting a professional cleaning beforehand helps the gel reach the tooth fully, ensuring even results.