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Bleaching of Discolored Tooth - Bleaching Agents in Dentistry

Bleaching is a procedure which involves the lightening of the color of the tooth through the application of a chemical agent to oxidize the organic pigmentation of the tooth.

Properties of an ideal bleaching agent

An ideal bleaching agent should:

  • be easy to apply on the teeth
  • have a neutral pH
  • lighten the teeth efficiently
  • remain in contact with oral soft tissues for short periods
  • be required in minimum quantity to achieve desired results
  • not irritate or dehydrate the oral tissues
  • not cause damage to the teeth
  • be well controlled by the dentist to customize the treatment of patient needs.
Bleaching Techniques: 
a) For Vital Teeth
- Home bleaching technique / Night guard vital bleaching / Matrix bleaching
- In office bleaching
    * Thermocatalytic
    * Non Thermocatalytic
    * Microabrasion

b) For non vital teeth
- Thermocatalytic in-office bleaching
- Walking bleach / Intracoronal bleaching
- Inside / Outside bleaching
- Closed chamber bleaching / extracoronal bleaching

c) Laser assisted bleaching


Bleaching Agents:
A. Carbamide Peroxide : It is a bifunctional derivative of carbonic acid. It is available as:
- For Home bleaching:
 i) 5% carbamide peroxide
ii) 10% carbamide peroxide
iii) 15% carbamide peroxide
iv) 20% carbamide peroxide

- In-office bleaching
i) 35% solution of carbamide peroxide


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