How long do you use crest white strips
Use whitening strips only for the wear time and number of days printed on the specific package or advised by a dentist.
The short answer
Wear peroxide whitening strips for the duration printed on that product’s instructions, and do not extend the course to chase a lighter shade. Products differ in peroxide concentration, contact time, and course design, so the package directions are part of the treatment.
How do whitening strips change the colour of teeth?
Whitening strips hold a peroxide gel against the tooth surface, where it breaks down some colour molecules within enamel and dentin. Temporary sensitivity or gum irritation can occur when gel contacts exposed roots or soft tissue.
How can you use whitening strips according to the label?
Check the exact product label, apply the strip to clean and dry teeth as directed, and keep gel off the gums. Stop the course and seek advice if sensitivity becomes significant, gums turn white or sore, or the strip does not fit the teeth.
When should teeth be examined before whitening treatment?
Have a dental examination before whitening if teeth have pain, untreated decay, cracks, gum recession, or restorations in the visible smile. Ask for help if sensitivity persists after stopping or if irritation does not settle.
What should you ask about whitening and dental restorations?
Ask whether the tooth colour is caused by surface stain or internal discoloration and whether fillings, crowns, or veneers will match after whitening. Ask which product strength and contact time fit your enamel, gums, and sensitivity history.
Frequently asked questions
Can I leave strips on longer?
No. Use only the stated wear time because longer contact can increase irritation without giving a predictable benefit.
Will strips whiten fillings?
No. Whitening changes natural tooth colour, while existing fillings and crowns generally require separate colour planning.
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.