Most people have tried some form of at-home whitening — strips, kits, whitening toothpaste — and most have been disappointed. Not because teeth whitening doesn’t work. Because the concentration of whitening agent in consumer products is legally capped at levels too low to produce a meaningful clinical result.
Professional in-office whitening at Cosmolaser uses prescription-strength hydrogen peroxide gels — formulations not available over the counter — activated by either a Zoom light or a dental laser. The combination of higher concentration and activation technology produces shade changes in a single session that at-home products cannot replicate in weeks of consistent use.
There’s a second reason professional whitening produces better outcomes: the procedure is personalised. Not every type of tooth discolouration responds the same way to whitening agents. Yellow staining from coffee, tea, and smoking responds extremely well. Brown staining from age and some medications responds moderately. Intrinsic grey staining from tetracycline or fluorosis responds poorly — and in these cases, veneers are the more appropriate recommendation. At Cosmolaser, a clinician assesses your stain type before treatment begins and will tell you honestly what result is achievable — and whether an alternative is more suitable.
Stain Type | Caused By | Response to Whitening |
|---|---|---|
Extrinsic — Yellow | Coffee, tea, red wine, smoking, some foods | ✓ Excellent — typically 6–8 shades improvement in a single session |
Extrinsic — Brown | Heavy tobacco use, prolonged dark beverage consumption, ageing | ✓ Good — 4–6 shades, may require 2 sessions for full result |
Intrinsic — Age-Related | Enamel thinning with age exposes yellowish dentin beneath | ✓ Moderate — whitening helps; combination with bonding may be recommended |
Intrinsic — Grey | Tetracycline antibiotics taken in childhood; dental trauma | ✗ Poor — whitening has limited effect. Veneers are typically more effective |
Fluorosis Spots | Excess fluoride exposure during tooth development | ✗ Variable — white spots may become more visible. Veneers or bonding recommended |
Post-Root Canal Darkening | Pulp necrosis following root canal treatment | ✓ Internal whitening (walking bleach) is available for single dark teeth |
Zoom is one of the most clinically recognised in-office whitening systems globally. A high-concentration hydrogen peroxide gel is applied to the teeth and activated by the Zoom light, which accelerates the bleaching reaction. Treatment consists of three 15-minute activation cycles in a single 60–90 minute appointment. Results of 6–8 shades are achievable in a single session. A custom take-home kit is provided after treatment to maintain and enhance the result.
Laser whitening uses a dental laser to activate the whitening gel applied to the teeth. The laser's concentrated energy accelerates the chemical reaction, producing significant shade improvement. Comparable in effectiveness to Zoom — the method is selected based on the patient's stain type and clinical assessment. Treatment is completed in a single visit.
A professional-grade take-home kit uses custom-fitted whitening trays made from impressions of your teeth, combined with a prescription-strength whitening gel (10–16% carbamide peroxide — significantly stronger than anything available over the counter). Worn for 1–2 hours per day or overnight for 10–14 days. Results are more gradual than in-office treatment but still substantially better than retail products.
The most effective long-term result combines an in-office Zoom or laser session with a custom take-home kit used for the following 10–14 days. The in-office session produces the initial dramatic brightening. The take-home kit consolidates and extends the result. This is the protocol we recommend for patients wanting the maximum achievable improvement from whitening.
| A1 | A2 | A3 | B1 | B2 | A3.5 | B3 | A4 | B4 |
|---|---|---|---|---|---|---|---|---|
|
← Target range after whitening |
Typical starting range for whitening patients → |
|||||||
Situation | Whitening | Veneers |
|---|---|---|
Yellow surface staining | ✓ Excellent result | Not needed |
Brown staining | ✓ Good result | Consider if whitening insufficient |
Grey / tetracycline staining | ✗ Poor response | ✓ Recommended first-line treatment |
Chipped or shaped teeth | ✗ No structural correction | ✓ Addresses colour and shape together |
Existing crowns or veneers | ✗ Whitening won't change shade | ✓ Replacement required for colour change |
Gaps or alignment concerns | ✗ No alignment effect | ✓ Or aligners — discuss at consultation |
Pre-veneer whitening | ✓ Whiten natural teeth first | Shade-match veneers to whitened result |
We’ve gathered the most common questions to help you feel informed, confident, and ready for your journey with us.