Written by : Dr. Urusa I Inamdar
It is used as a whitening agent in dentistry . It is available in concentration between 5 and 35% .
It is classified into organic and inorganic .
They are strong oxidizers and can be considered as the products of hydrogen peroxide (H2O2) when hydrogen atoms are substituted with metals or with organic radicals .
Mechanism of action
H2O2 has a low molecular weight and hence can penetrate dentin and release oxygen that breaks down the double bond of inorganic and organic compounds inside the tubule .
- Clear , colourless , odorless liquid , stored in lightproof amber bottles .
- It is unstable and should be kept away from heat .
- It should be stored in sealed refrigerated containers .
- It has ischemic effect on skin and mucous membrane which causes burn . It is especially painful if it comes in contact with nail bed or the soft tissue under the fingernail .
About 1-2 ml amount is required for bleaching operation .
Discard the remaining solution , once treatment has been completed .
Hydrogen peroxide concentrations ranging from 3-7.5 % are used for home bleach .
It can be used alone or mixed with sodium perborate into a paste for use in the walking bleach technique .
- Grossman’s Endodontic Practice