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.
What is the direct answer?
What does this question mean?
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.
What can you do next?
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 you seek dental care?
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 the dentist?
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.