Professional tooth whitening: safety, sensitivity, and realistic shades
In-office and take-home whitening can brighten enamel safely when gums are healthy and instructions are followed. Learn what affects results and comfort.
Whitening uses peroxide-based gels to lighten natural tooth enamel. It does not change the colour of fillings, crowns, or veneers; those may need separate cosmetic updates if you want an even shade.
In-office vs take-home
- In-office sessions use stronger gels with careful isolation of soft tissues; good for a faster boost before an event.
- Custom take-home trays use milder gel over one to two weeks and often give stable results with less sensitivity for some patients.
Sensitivity
Short-term sensitivity to cold is common and usually settles. Desensitising toothpaste, shorter wear times, and spacing sessions can help. Untreated decay or gum disease should be addressed before whitening.
Realistic expectations
Natural teeth have a range of undertones. Whitening typically lifts yellow-brown tones more than grey tones. Your dentist can show a shade guide so goals stay achievable.
Healthy enamel first, brightness second — skipping the exam to rush whitening often backfires.