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Dental Materials

Whitening/Bleaching

QuestionAnswer
When and how does teeth bleaching/whitening actually occur? it occurs when the whitening material passes through the spaces in enamel and oxidizes the stains.
Which tooth colors are most difficult to bleach? blue-gray and black colors are more difficult to bleach than yellow-brown discolorations
What ingredient is used to internally whiten/bleach non-vital teeth? Sodium peroxyborate monohydrate (Amosan)
How long is the gel worn in the custom-made tray during at home whitening? 30 minutes twice daily to as long as overnight.
Which is more effective: at home whitening prescribed by a DDS or an in-office whitening procedure? both are equally effective
What is the procedure for over the counter bleaching/whitening? clear, flexible strips containing peroxide gel covering the six anterior teeth worn for 30 minutes once or twice a day
Why should caries or leaking restoration be fixed before the whitening process is started? penetration of whitening through dentinal tubules might irritate the pulp and cause sensitivity
What are reasons that a person should wait several weeks to whiten/bleach after composite bonding procedures, veneers, or crowns are done? better shade match and newly whitened surfaces will be weaker than if the teeth are allowed to restabilize for a couple of weeks.
What ingredients do whitening/bleaching materials contain to help cut down on tooth sensitivity? fluoride and potassium nitrate
How does a 35% hydrogen peroxide liquid whitening agent differ from a 35% carbamide peroxide etch gel? 35% liquid hydrogen peroxide is not as controllable as 35% carbamide peroxide
What color stains are most effectively removed by bleaching/whitening of vital teeth? yellow-brown
What are potential side effects of bleaching/whitening? Condyle pain, sensitivity, gingiva, mucosa and throat irritation from excess material that comes out of the trays
How does tooth bleaching/whitening work? Passes through enamel to lighten dentin
What is the best way to protect oral tissues during a power-bleaching/whitening appointment? Rubber dam
What is the procedure for “power whitening/bleaching”? Initial procedure is in office with strong concentration materials. The patient is sent home with custom trays to continue.
How does whitening varnish differ from power whitening? Whitening varnish is not as technique sensitive and can be completed in one visit
What is the active ingredient in OTC whitening materials? Carbamide peroxide
What concentrations of carbamide peroxide are available for home whitening/bleaching? 10% to 35%.
Which has a weaker oxidizing agent, carbamide or hydrogen peroxide? carbamide
What is the active ingredient used for in-office whitening materials? both carbamide and hydrogen peroxide
What substances are used to perform enamel microabrasion? pumice and hydrochloric acid
Created by: BrendaAlberts
 

 



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