Tooth whitening removes stains that have built up inside the teeth over time. The agent used is carbamide peroxide or hydrogen peroxide, in varying concentrations depending on the case. A careful analysis should be done by the dentist for the best result.
Types of stains
Extrinsic – caused by outside factors such as coffee, tea, wine, colas and tobacco over a period of time. These stains respond well to whitening.
Intrinsic – internal stains that are more resistant to bleaching. Causes include:
Drug stains
Certain antibiotics such as tetracycline
Excessive fluoride
Whitening protocol
1. Home bleaching kit
The patient follows the dentist’s instructions to dispense bleaching gel into customised trays that fit their teeth. A follow-up is needed to check on shade improvement.
2. Chair-side bleaching
A stronger bleaching gel is used at the chair with full supervision. The teeth and gums are well isolated, and the gel is dispensed and activated under a special light. The result is usually immediate, though the degree of whitening can vary.
Post whitening
Moderate your consumption of coloured drinks, or at least rinse with water afterwards. A home bleaching routine can be continued later to prevent the shade from reversing, and a whitening toothpaste helps maintain the colour.
Effects of bleaching
Some sensitivity may occur. It can be managed with desensitising gel; tell the dentist if it becomes unbearable. Follow instruction closely. Before whitening, any exposed roots should be filled if abraded, or protected during the procedure to minimise sensitivity.
