In brief: Home whitening and Zoom in-clinic whitening use the same chemistry: peroxide breaks down stain molecules inside the tooth. Zoom uses a much stronger gel under a dentist's supervision and works in one visit of under an hour; home whitening uses a weaker gel in custom trays over about two weeks. Zoom suits a deadline or heavier staining, home whitening suits mild staining, a gradual change and keeping results up after Zoom.
How teeth whitening works
Whitening gels contain hydrogen peroxide, or carbamide peroxide, which releases hydrogen peroxide in the mouth. The peroxide passes into the enamel and dentine and breaks down the coloured molecules left by tea, coffee, red wine, tobacco and ageing.
The difference between home and in-clinic whitening is the strength of the gel and how long it stays on the teeth. Carbamide peroxide releases roughly a third of its strength as hydrogen peroxide, so a 10% carbamide gel works like about 3-4% hydrogen peroxide.
Home whitening vs Zoom whitening
- Gel strength: dentist-dispensed home gels are usually around 10-16% carbamide peroxide; Zoom uses a high-concentration hydrogen peroxide gel, commonly about 25%.
- Time: home whitening is worn for a set time each day or night over roughly 10-14 days; a Zoom session at Dazzle takes under an hour in one visit.
- Supervision: with Zoom, the dentist protects the gums with a barrier, applies the gel and monitors the teeth throughout; home whitening is checked at review visits.
- Results: both can lighten natural teeth by several shades. Zoom gives a faster, larger change at one sitting (up to about 8 shades in suitable cases); home whitening builds up gradually and allows you to stop at the shade you want. Results vary from person to person.
- Cost at Dazzle: office (Zoom) whitening from ₹15,000 (cleaning extra); home whitening ₹9,000.
Which one to choose
Zoom suits patients with a wedding, event or short trip to Mumbai, moderate staining, or anyone who prefers a supervised single appointment. Home whitening suits mild staining, patients who want a slower and controllable change, and anyone keeping up results after Zoom. Many patients combine the two: Zoom for the main change, then custom trays for occasional top-ups.
What happens during a Zoom session
The dentist first records your starting shade and checks that the teeth and gums are healthy; teeth should be cleaned before whitening. The lips and gums are protected, the gel is applied and activated with the Zoom (WhiteSpeed) LED lamp, and the cycle is repeated. A protective gel is applied at the end to reduce sensitivity. Read more in our guide to Zoom whitening in Mumbai.
Custom trays vs shop-bought products
Over-the-counter strips and gels have a fixed, low strength and do not fit your teeth exactly, so coverage near the gums and between teeth is patchy. They can lift some surface stain from the front teeth.
Dentist-dispensed kits use trays made from a scan or impression of your teeth. The tray holds the gel evenly against the tooth surface and keeps it off the gums, which allows a stronger gel to be used safely and gives a more even result.
What whitening cannot change
- Crowns, veneers and fillings do not lighten. If you have them on front teeth, whiten first, then replace the restorations to match the new shade.
- Tetracycline staining (grey or brown bands from antibiotics taken while teeth were forming) responds poorly and slowly.
- Fluorosis white spots may become more or less noticeable; microabrasion, resin infiltration or bonding may suit them better.
- A dark tooth after root canal treatment is stained from the inside. Internal bleaching, where the agent is placed inside the tooth, is used instead; it starts from ₹7,000.
For staining that whitening cannot fix, bonding or veneers are the usual options; see our teeth whitening and cosmetic dentistry pages.
Who should wait before whitening
Whitening is postponed in patients with active gum disease, untreated cavities, cracked teeth or exposed roots that have not been assessed, since peroxide on these areas causes marked sensitivity. Elective whitening is also usually deferred during pregnancy and breastfeeding, and it is not normally done for young children.
FAQs
Does whitening damage enamel?
Published studies do not show lasting enamel damage from correctly used whitening at standard strengths. The risk comes from misuse: very strong unsupervised products, or leaving gel on far longer than advised.
How do I manage sensitivity?
Sensitivity is the most common side effect and is usually temporary. A potassium nitrate toothpaste for two weeks before and during whitening helps, as does skipping a night between home sessions or using a lower-strength gel for longer.
How long do results last?
Results usually last from several months to a couple of years, depending mostly on tea, coffee, red wine and tobacco. Occasional top-ups with your custom trays keep the shade up.
Not sure whether Zoom or home whitening suits your teeth? Book a Consult at our Bandra West or Kemps Corner clinic.
