Published 2026-05-05 · Updated 2026-06-08 · 5 min read
Why teeth darken
Discolouration can be external (coffee, tea, red wine, smoking) or internal, related to tooth structure, age or trauma. The cause directly influences the outcome of whitening.
The assessment beforehand
Untreated decay, inflamed gums or leaking restorations need addressing first. Existing fillings and crowns do not change colour, which may mean replacing them afterwards.
Possible effects and maintaining the result
Temporary tooth sensitivity is common and usually short-lived. How long the result lasts depends on diet and smoking.
No specific final shade can be guaranteed.
This content is provided for general information and does not replace a dental consultation.
The information on this website is provided for information and education only and does not replace a consultation, a diagnosis or the personalised recommendation of a dentist.