– Chair-side and Home Bleaching Kits
Tooth whitening can either be restoration of natural tooth shade or whitening beyond natural tooth shade, depending on the definition used.
To whiten the natural tooth shade, bleaching is required.
Whitening methods include in-office bleaching (applied by a dental professional), and treatments which the individual carries out at home (either supplied by a dental professional or available over the counter). peroxide, which bleaches the tooth enamel to change its color. Off-the-shelf products typically rely on a carbamide peroxide solution varying in concentration from 10% to 44%. Bleaching solutions may be applied directly to the teeth, embedded in a plastic strip that is placed on the teeth or use a gel held in place by a mouthguard. Carbamide peroxide reacts with water to form hydrogen peroxide. Carbamide peroxide has about a third of the strength of hydrogen peroxide. This means that a 15% solution of carbamide peroxide is the rough equivalent of a 5% solution of hydrogen peroxide. The peroxide oxidizing agent penetrates the tooth enamel and breaks down stain deposits in the dentin.
The whitening shade guides are used to measure tooth color. These shades determine the effectiveness of the whitening procedure, which may vary from two to seven shades. The effects of bleaching can last for several months, but may vary depending on the lifestyle of the patient.
In-office bleaching procedures generally use a light-cured protective layer that is carefully painted on the gums and papilla (the tips of the gums between the teeth) to reduce the risk of chemical burns to the soft tissues. The bleaching agent is either carbamide peroxide, which breaks down in the mouth to form hydrogen peroxide, or hydrogen peroxide itself. The bleaching gel typically contains between 10% and 44% carbamide peroxide, which is roughly equivalent to a 3% to 16% hydrogen peroxide concentration.
Bleaching is least effective when the original tooth color is grayish and may require custom bleaching trays. Bleaching is most effective with yellow discolored teeth. If heavy staining or tetracycline damage is present on a patient’s teeth, and whitening is ineffective (tetracycline staining may require prolonged bleaching, as it takes longer for the bleach to reach the dentin layer), there are other methods of masking the stain. Bonding, which also masks tooth stains, is when a thin coating of composite material is applied to the front of a person’s teeth and then cured with a blue light. A veneer can also mask tooth discoloration.
At-home whitening methods include gels, chewing gums, rinses, toothpastes, paint-on films, and whitening strips. Most over-the-counter methods utilize either carbamide peroxide or hydrogen peroxide.
A follow up program of At Home whitening products/treatments can also help in maintaining and extending the results of an In-office or Chair-side bleaching.