Crest whitening professional
Professional whitening uses a formulated gel after a dental check, with results depending on stains, natural tooth structure, and restorations.
The short answer
Professional whitening associated with a branded home system means a dentist first checks the teeth and gums, then selects and supervises a formulated whitening gel and tray or other delivery method. The result depends on the original stain, tooth structure, restoration materials, and how the treatment is used.

What is the direct answer?
What does this question mean?
Whitening lightens natural enamel and dentine through an oxidizing peroxide ingredient; it does not change the colour of fillings, crowns, veneers, or bonding. A product name alone does not show whether a particular kit is suitable for your mouth or the right treatment for the discoloration.
What can you do next?
Have a dental examination before whitening to identify decay, leaking restorations, gum inflammation, cracks, exposed roots, and existing sensitivity. Follow the prescribed wear time, keep gel off the gums, use the recommended tray, and report burning or persistent sensitivity instead of extending treatment.
When should you seek dental care?
See a dentist before whitening if you have untreated cavities, gum disease, enamel defects, pregnancy-related questions, or a dark single tooth. Stop and seek advice for severe sensitivity, gum burns, ulceration, or pain that remains after the session.
What should you ask the dentist?
Ask whether the stain is external, internal, medication-related, or caused by trauma, and whether whitening can address it. Ask how the tray fits, which gel is used, how restorations will be matched, and what alternatives exist if whitening is unsuitable.
Frequently asked questions
Can professional whitening remove every stain?
No. Some intrinsic discoloration, restorations, and developmental enamel changes may need another approach after diagnosis.
Why can whitening cause sensitivity?
The whitening agent can temporarily affect fluid movement through dentinal tubules, especially when dentine is exposed or treatment is overused.
