Filling material and biocompatibility info.

Cerec is an indirect all ceramic crown, onlay, or veneer.  Most people get direct composite fillings, which are better for small and medium cavities, as they stick to teeth very well.  Ceramics (porcelain) do not stick as well and more tooth structure must be missing or drilled to create a hole that will lend the best adhesion.

The blocks of ceramic (porcelain), as well as direct composite materials do have metals.  Diamond nearly all of the metals burn off during processing.  The Diamond line, the ceramic glass fillers used are of the highest purity so that the usual residual metals have been eliminated through an exacting manufacturing process.  But, adhesives always have at least one or more toxic ingredients.  It is best to use one that has the least. 

Degussa made by Dentsply is also an indirect ceramic onlay or crown.  There are many products in this line.  Here is an example of part of an MSDS for Ceramco 3.  This does not include the adhesive. 

DESCRIPTION: Inorganic glass powder with opacifiers and pigments

DiamondLite fillings have Dimethacrylate esters listed on their MSDS.  DiamondBond contains HEMA, a methacrylate, but all adhesives contain methacrylate derivatives.  DiamondBond, appears to be the least toxic of all the bonding materials.

You can use this as a reference for materials that are least and most desirable:  

http://curezone.com/forums/fm.asp?i=887607#i

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Always check the MSDS before you put anything in your mouth.

The bonding material typically used with Cerec is RelyX™ Unicem

Here are a couple examples of ingredients in Cerec kits:

2700 3M PARADIGM MZ100 NEW USER KIT FOR CEREC

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2700C-S 3M(TM) ESPE(TM) PARADIGM(TM) MZ100 NEW CEREC USER KI...

Ingredient C.A.S. No. % by Wt

GLASS POWDER 65997-17-3 55 - 65

METHACRYLATED PHOSPHORIC ACID ESTERS None 15 - 25

TRIETHYLENE GLYCOL DIMETHACRYLATE (TEGDMA) 109-16-0 10 - 20

SILANE TREATEAD SILICA 122334-95-6 1 - 5

SODIUM PERSULFATE 7775-27-1 1 - 5

DIURETHANE DIMETHACRYLATE 72869-86-4 2 - 8

WATER 7732-18-5 2 - 8

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Biocompatibility reports are individual.  As you can see, there are many ingredients in Cerec that could cause a reaction in some people.  There are common dental products that most people are compatible with.  The Diamond line is one of the best as far as biocompatibility with the general public. 

Hal Huggins invented the original serum biocompatibility test.  He and Walter once worked together.  They had a falling out and Clifford went off on his own.  He made his own test based on the same blood test, just that he was only able to obtain partial disclosure from the dental product companies as to the ingredients.  Hal had full disclosure, but they only were willing to give it to one person.  Has since sold his test to Dr. Levy whom I had the pleasure of meeting a few years ago in L.A.  I spoke with Walter a few years ago and also spoke with Scientific Health Solutions (Hal's test) and both of them confirmed that the SHS has full disclosure but the Clifford test does not.  Walter is a nice person and he told me that he feels his test is adequate.  But, for my money, I went with the SHS test.  Biologic Dentists use either of those 2 tests if you have one done.

Torrie