Bright smile whitening kit
A home whitening kit uses peroxide in a tray or strip to oxidise stain molecules in natural enamel, with results shaped by fit and tooth condition.
The short answer
At-home kits place peroxide gel against teeth. A fitted tray can keep gel more evenly distributed than a generic tray, but neither method changes crowns or fillings.
How can you place whitening gel safely in the tray?
Inspect the tray, use only the directed amount, and keep gel away from the gingival margin. Do not combine products or repeat applications to compensate for a disappointing result.
What should you do before whitening sensitive teeth?
Arrange care for cavities, enamel cracks, exposed roots, or strong sensitivity before whitening. A dentist can check whether darkening comes from decay, trauma, medication, or stain.
When should a dentist check your teeth before whitening?
Ask which teeth can respond, whether a custom tray is appropriate, and how existing restorations will look after natural teeth are lightened.
What should you ask about trays and existing restorations?
Home gel
Frequently asked questions
No. A crown is made from restorative material and needs shade planning rather than bleaching.
Why did my gums turn white after gel use?
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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.