Do you brush your teeth before using crest white strips
Brush gently before whitening strips if needed, but follow the product directions and avoid applying strips to irritated gums.
The short answer
Brush gently before whitening strips if needed, but follow the product directions and avoid applying strips to irritated gums. Do not brush aggressively immediately before whitening because that can irritate the gum margin.
How does peroxide gel work on the front of your teeth?
Whitening strips hold a peroxide-containing gel against the front surfaces of teeth. Brushing removes loose plaque, while whitening changes the color of some tooth structure and does not remove tartar or treat decay.
How can you clean your teeth before applying the strips?
Clean your teeth gently, rinse, and let the mouth settle before placing the strips if the package permits it. Keep the gel off the gums, use only the stated wear time, and stop if sharp sensitivity or burning develops.
When should whitening-related pain or gum injury be examined?
Arrange an examination if whitening causes persistent pain, gum injury, or uneven color, or if a tooth has a cavity, crack, or large filling. A dentist can check whether discoloration is inside the tooth or on its surface before whitening.
Will whitening match your fillings, crowns, or veneers?
Ask whether the discoloration is suitable for peroxide whitening and whether existing fillings, crowns, or veneers will match. Also ask how to manage sensitivity and whether gum recession is exposing root surfaces.
Frequently asked questions
Can I use strips after brushing?
Yes, if brushing was gentle and the product directions allow it; avoid whitening over irritated gums.
Will strips whiten fillings?
No. Whitening changes natural tooth color, so existing fillings and veneers may not change shade.
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.