Smilelab flash speed whitening strips
Whitening strips contain peroxide that oxidizes some stain molecules on enamel. Use depends on enamel, gums, fillings, crowns, and the product instructi...
The short answer
Whitening strips contain peroxide that oxidizes some stain molecules on enamel. Use depends on enamel, gums, fillings, crowns, and the product instructions.

What is the direct answer?
Whitening strips are flexible plastic trays or films coated with a peroxide gel. The gel contacts the front surfaces of teeth and can cause temporary sensitivity or gum irritation if it touches soft tissue.
What does this question mean?
Stains on enamel may be surface deposits or deeper colour changes within tooth structure. Existing fillings, bonding, crowns, and veneers do not bleach like natural enamel, so colour matching matters.
Read the label, keep the strip on only for the stated interval, and keep gel off the gumline. Stop if burning or significant pain develops, and do not use it over untreated decay or irritated gums.
What can you do next?
Read the label, keep the strip on only for the stated interval, and keep gel off the gumline. Stop if burning or significant pain develops, and do not use it over untreated decay or irritated gums.
Arrange a dental examination for persistent pain, a gum burn, uneven whitening, or a tooth that darkened after an injury. A dentist can check enamel, pulp health, restorations, and the cause of discolouration.
When should you seek dental care?
Arrange a dental examination for persistent pain, a gum burn, uneven whitening, or a tooth that darkened after an injury. A dentist can check enamel, pulp health, restorations, and the cause of discolouration.
Ask whether the discolouration is external or internal, whether restorations will need replacement for colour matching, and whether a peroxide product is appropriate for your enamel and gums.
What should you ask the dentist?
Ask whether the discolouration is external or internal, whether restorations will need replacement for colour matching, and whether a peroxide product is appropriate for your enamel and gums.
Whitening strips are flexible plastic trays or films coated with a peroxide gel. The gel contacts the front surfaces of teeth and can cause temporary sensitivity or gum irritation if it touches soft tissue.
Frequently asked questions
Can whitening strips change fillings or crowns?
Natural enamel can lighten, but fillings, crowns, and veneers do not bleach.
When should I arrange an examination?
Arrange a dental examination for persistent pain, a gum burn, uneven whitening, or a tooth that darkened after an injury. A dentist can check enamel, pulp health, restorations, and the cause of discolouration.
