Crest level 12 whitening strips

Whitening strips place a peroxide-containing gel against the front surfaces of teeth. The gel can lighten some surface and internal stains, but it does not change the colour of fillings, crowns, veneers, or other restorations.

The product name refers to an over-the-counter tooth-whitening strip, while “level 12” describes a product variant rather than a dental diagnosis. Whitening can irritate exposed dentine or the gingival margin, especially when the strip overlaps the gums or is used too often.

Whitening strips contact enamel with peroxide gel.

Check that the strip fits the visible tooth surfaces, keep it off the gums, follow the package wear time, and do not combine it with another peroxide product. Use a soft brush and ordinary fluoride toothpaste while monitoring sensitivity.

Keep a record of changes and bring the product, appliance, or medication list to the appointment so the clinician can assess the relevant details.

Arrange a dental examination before whitening if a tooth is painful, cracked, unusually dark, or has a cavity. Seek care promptly for facial swelling, severe pain, or a gum reaction that continues after the strip is removed.

Do not delay assessment when symptoms are escalating, recurring, or affecting eating, sleep, mouth opening, breathing, or swallowing.

Ask whether the darkening is a stain or a sign of decay, whether any fillings will remain a different shade, and which whitening method suits your enamel and gum condition.

Ask what the examination found, which treatment is intended to address the cause, and how you will know whether the problem is improving.