Safest Whitening Products for Sensitive Teeth
Not all whitening products are suitable for sensitive teeth. We explain which formulas and delivery methods cause the least discomfort.
Why Whitening Causes Sensitivity
Whitening agents temporarily increase the permeability of dentinal tubules — microscopic channels in the tooth that connect to the nerve. This allows the whitening agent to reach stain molecules deeper in the tooth, but also allows stimuli (temperature, pressure) to reach the nerve more easily.
Sensitivity is usually temporary and resolves within 24–48 hours of stopping treatment. It is more common with higher peroxide concentrations and longer session times.
Best Options for Sensitive Teeth
PAP whitens without the dentinal tubule permeability increase associated with peroxide. Lower sensitivity is the primary clinical advantage. SmilePro's PAP formula is our top recommendation for sensitive teeth in the UK and EU market.
Shorter session times mean less total gel exposure. A 10-minute LED session produces less sensitivity than a 45-minute strip application, even with equivalent active ingredient concentrations.
Potassium nitrate desensitises the nerve by blocking dentinal tubule transmission. Products containing this ingredient alongside the whitening agent are significantly better tolerated by sensitive users.
Managing Sensitivity During Treatment
- —Start with shorter sessions than recommended and build up gradually
- —Use a desensitising toothpaste for 2 weeks before starting whitening
- —Avoid very hot or cold food and drink for 24 hours after each session
- —Take a day off between sessions if sensitivity is significant
- —Stop treatment and consult your dentist if sensitivity is severe or persistent