Bleaching trays from dentist before and after
Dentist-made whitening trays fit closely and use prescribed peroxide gel, so results depend on the starting shade, stains, and enamel condition.
The short answer
Dentist-made bleaching trays are custom-fitted plastic trays used with peroxide gel; before-and-after changes vary with the original tooth shade, stain type, and treatment instructions. Existing fillings, crowns, and veneers do not change colour like natural enamel.
What is the direct answer?
What does this question mean?
The dentist takes impressions or a digital scan and makes trays that hold gel against the tooth surfaces while limiting contact with the gums. Peroxide breaks down stain molecules within enamel and dentine, rather than covering them with paint.
What can you do next?
The clinic checks for decay, cracks, gum disease, exposed roots, and unsuitable restorations before whitening. Use only the supplied gel and wear time, keep gel off the gums, and record the starting shade in consistent lighting if you want to compare photographs.
When should you seek dental care?
Contact the clinic if whitening causes persistent gum burning, marked sensitivity, uneven colour, or a tray that rubs. Examination is also needed when a dark tooth or one isolated stain does not respond like neighbouring teeth.
What should you ask the dentist?
Ask what type of stain is present, which restorations will remain unchanged, and how the trays will be adjusted if sensitivity occurs. Ask when a shade comparison should be made after treatment.
Frequently asked questions
Will the trays whiten fillings?
No. Fillings, crowns, and veneers may need colour-matching or replacement if their shade no longer matches.
Why can two teeth whiten differently?
Their enamel thickness, dentine colour, stain history, and restorations may differ.