Overview
Pen-style applicators dispense a small amount of peroxide gel that dries on the tooth. Concentrations and formulations vary widely between products.
How it works
- Gel remains on enamel long enough to release peroxide before being diluted by saliva.
- Effect is generally superficial and short-lived compared to tray or strip systems.
Best for
- Maintenance between more substantial whitening treatments.
- Travel or on-the-go touch-ups.
What to consider
- Formulation quality and peroxide concentration vary - read labels carefully.
- Not a substitute for a full whitening course if noticeable change is the goal.
Evidence note