Cosmetic Dentistry
09/27/2006
What does the procedure involve?
The whitening product is applied to the teeth by the dentist, using a specially made tray, which fits into the mouth like a gum shield. The chemical may be activated using heat or heat and light combined. The active ingredient in the product is normally hydrogen peroxide or carbamide peroxide.
If the teeth have not been root treated, the canal, which previously contained the nerve, may be reopened and the product is inserted.
In both cases, the procedure needs to be repeated until a satisfactory shade is attained.
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How long does the procedure take?
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09/22/2006
Whether you purchase strips over the counter in a pharmacy, answer an ad on late-night TV or have treatment in your dentist's office, all the whitening agents are based on a peroxide solution. The solution cleans teeth with a bubbling action that removes stains trapped in your teeth's enamel. Whitener types differ by strength of the peroxide solution and by delivery method.
Your dentist can help you choose the appropriate whitener.
Inexpensive over-the-counter products, such as whitening strips, have about a 4 percent peroxide solution and can whiten teeth by two or three shades.
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07/23/2006
By: Dan Huber, RDT, DD
Heraeus Kulzer, manufacturer of porcelains for porcelain fused to metal, zirconia or titanium crowns, specify that proper substructure support must be achieved to create a crack-free restoration.
The frameworks must be designed to allow for no more than a 2.0mm thickness for porcelain and be designed with rounded corners (Fig. 8).
All porcelain manufacturers specify these requirements for frameworks, to eliminate stress, which may result in chips and cracks in fired porcelain.
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