Content is reviewed by our specialist team to ensure clinical accuracy.
A brighter smile is one of the most requested cosmetic improvements — but the whitening industry is full of bold claims and hidden risks. Here's the science behind what actually works, what's safe, and what's worth spending money on.
Why Teeth Stain
Tooth discolouration falls into two categories. Extrinsic staining sits on the enamel surface — caused by coffee, tea, red wine, curry and tobacco. It responds well to whitening. Intrinsic staining occurs within the dentine layer — from tetracycline antibiotics, excessive fluoride during development (fluorosis), trauma, or ageing — and is far harder to treat; some cases require veneers rather than bleaching.
Home Whitening Options
In-Chair Professional Whitening
Professional whitening uses 25–40% hydrogen peroxide gels, often with light activation (LED or laser). A complete treatment — typically 60–90 minutes — can lift teeth by 6–10 shades in a single session. Gum tissue is protected with a liquid dam, and the highly concentrated gel is applied only to tooth surfaces under clinical control.
Side-by-Side Comparison
| Method | Shade Improvement | Duration | Cost (approx.) |
|---|---|---|---|
| Whitening Toothpaste | 1–2 shades | 2–4 weeks | ₹200–500 |
| OTC Strips | 2–4 shades | 3–6 months | ₹800–2,000 |
| Take-Home (clinic kit) | 4–6 shades | 6–12 months | ₹3,000–5,000 |
| In-Chair (single session) | 6–10 shades | 6–12 months | ₹8,000–18,000 |
| In-Chair + Take-Home | 8–12 shades | 12–18 months | ₹12,000–22,000 |
Safety: What to Know
Whitening is safe when performed correctly, but there are important caveats:
- Temporary sensitivity during treatment affects about 38% of patients. It resolves within 24–48 hours; use a desensitising toothpaste during the whitening period.
- Bleaching does not work on crowns, veneers, bonding or composite fillings — these must be replaced after whitening to match the new shade.
- Whitening is contraindicated during pregnancy and in patients with severe gum disease or untreated cavities.
- Overuse of high-concentration products can permanently damage enamel — always follow the recommended protocol.