Overview
Performed in a dental office using high-concentration hydrogen peroxide gel (typically 25–40%). A protective barrier is applied to the gums and, in some protocols, a curing light or laser is used alongside the gel.
How it works
- Peroxide penetrates the enamel and dentin, oxidizing pigmented molecules within the tooth.
- Higher concentrations act faster than at-home options, producing visible change in a single session.
- The role of accompanying lights/lasers in adding extra whitening effect is debated in the literature.
Best for
- People seeking the fastest visible change under professional supervision.
- Cases where a dentist has ruled out underlying issues (decay, cracks, exposed roots).
What to consider
- Transient sensitivity and gum irritation are common in the days following treatment.
- Existing crowns, veneers, and fillings will not lighten and may become visibly mismatched.
Evidence note
Cite Cochrane Oral Health review on tooth whitening and ADA consumer guidance.