How to Use Crest 3D Whitestrips
Use Crest 3D Whitestrips exactly as the package directs and keep them off your gums. Learn when to brush and when irritation means stopping.
The short answer
Whitening strips are flexible plastic trays coated with a peroxide gel that contacts the enamel for a timed period; use the supplied directions, then remove and rinse. Do not sleep in them or place them over inflamed gum tissue.
What are whitening strips designed to treat?
The product is an at-home tooth-whitening system, not a filling or a treatment for decay. Peroxide enters enamel and dentin and oxidizes some stain molecules, while crowns, fillings, veneers, and bonding retain their original color.
How can you apply strips without irritating the gums?
Brush gently before the first use, dry the teeth if the instructions say to do so, and press the strip against the front surfaces without folding it onto the gums. Keep it on only for the printed time, remove all gel, and limit strongly colored foods if they trigger sensitivity.
When should your teeth be examined before whitening strips?
Arrange a dental examination before whitening if you have untreated cavities, cracked teeth, gum disease, or unexplained sensitivity. Stop the product and seek advice if burning, swelling, ulceration, or pain continues after removal.
Would a custom tray or supervised plan suit your enamel?
Ask whether the discoloration is surface stain or an internal tooth change, whether existing restorations will match afterward, and whether a custom tray or professionally supervised plan is more suitable for your enamel and gums.
Frequently asked questions
Can strips whiten a crown?
No. They can lighten nearby natural teeth while the crown keeps its existing shade.
What if my teeth become sensitive?
Remove the strips, pause further applications, and ask a dentist if sensitivity persists or is severe.
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.