Crest 1 hour express before and after
Crest 1 Hour Express uses peroxide to lighten natural tooth stains, but the visible change depends on the starting shade and stain type.
The short answer
Crest 1 Hour Express is a peroxide whitening strip treatment for natural teeth, and the visible change depends on the starting shade, stain type, fit, and use. A before-and-after comparison is meaningful only when photographs use the same lighting and tooth position.
How do short-use whitening strips contact the enamel?
The strips hold a whitening gel against enamel for a short application period. Surface stains from foods or tobacco may respond differently from colour inside dentin, and restorations retain their original shade.
How can you use whitening strips safely at home?
Read the package directions, keep gel off the gums, and use the supplied strips only on clean natural teeth. Stop if the gums become sore or the teeth develop strong sensitivity, and arrange an examination for pain or suspected decay.
When should a dentist assess your teeth before whitening?
See a dentist before whitening a painful, cracked, decayed, or recently repaired tooth. Dental advice is also appropriate when colour is uneven, a single tooth is grey, or irritation remains after stopping the strips.
What should you ask about stains and visible restorations?
Ask whether the discolouration is on the surface or within the tooth and whether any restorations will remain visible. Ask about a custom whitening plan if the strips do not contact the teeth evenly.
Frequently asked questions
Why might the result look uneven?
Uneven contact, different starting shades, enamel variation, or visible restorations can make colour appear uneven.
Can a dentist offer another option?
Yes. A dentist can discuss professional in-office whitening, custom trays, stain removal, or restorative treatment according to the cause.
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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.