What is the direct answer?
A home whitening kit should use a dentist-fitted tray and appropriate peroxide gel; product instructions vary, so follow the supplied protocol.
What does this question mean?
Home whitening lightens natural tooth colour with peroxide gel. Fillings, crowns, veneers, and dentures do not change colour in the same way as natural enamel.
What can you do next?
Have a dentist check for decay, gum inflammation, cracks, exposed dentine, and visible restorations before whitening. Keep gel off the gums and stop for marked sensitivity or irritation.
When should you seek dental care?
Seek assessment for persistent sensitivity, gum burns, uneven colour, or pain after whitening. Swelling or infection symptoms need dental care rather than another whitening session.
What should you ask the dentist?
Ask what gel concentration and wear schedule apply, whether your restorations will match afterward, and how existing sensitivity will be managed.
Frequently asked questions
Can self-care replace a dental examination?
It may ease symptoms or improve cleaning, but it cannot diagnose or correct disease, damage, infection, or a poorly fitting appliance.
What will the dentist assess?
The dentist will review your history, examine the relevant tissues, and select tests or images that clarify the cause and treatment.

