Does teeth whitening damage enamel?
Professionally supervised whitening at appropriate concentrations does not damage enamel. Problems arise from unsupervised use of very high concentrations, from whitening over untreated decay, or from gel sitting on unprotected gums, which is precisely what the in-clinic protocol prevents.
How long do the results last?
Commonly one to three years, depending heavily on coffee, tea, red wine and smoking. Custom take-home trays can be topped up periodically to hold the shade rather than repeating the full treatment.
Will whitening work on my crowns or veneers?
No. Whitening only lightens natural tooth structure. Crowns, veneers, bridges and composite fillings keep the shade they were made in, which is why whitening is done before any new front restorations are matched.
Is in-clinic or take-home whitening better?
In-clinic is faster and fully supervised; take-home trays are more gradual and easier to top up later. Many cases are best served by combining the two, and which suits you depends on your starting shade, sensitivity and timeline.
Why can't I just use a whitening toothpaste or a shop-bought kit?
Whitening toothpastes remove surface stain by abrasion but do not change the underlying shade. Retail kits use much lower concentrations and generic trays, so the gel is both weaker and less reliably in contact with the teeth.
Does whitening hurt?
Whitening itself is not painful. Temporary sensitivity to cold during and for a short period afterwards is common, expected, and managed by adjusting the protocol and using desensitising agents.