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Medical Forum / General / Dentistry / May 2007cerec proglem
I am 72 years of age and have had a number of cerec restorations over the last 10 years. However, they frequently fall out (at about the rate of one every three or four months or so). My dentist re-inserts them and tells me that there is nothing that can be done. Is this true? I'm beginning to think they are not worth the cost. > I am 72 years of age and have had a number of cerec restorations over > the last 10 years. However, they frequently fall out (at about the > rate of one every three or four months or so). My dentist re-inserts > them and tells me that there is nothing that can be done. Is this > true? I'm beginning to think they are not worth the cost. I think some dentist that grab onto Cerec think that they can bond a hunk of porcelain on any shape of left over tooth and have success. Though I don't use Cerec myself, I have seen several restorations. Some are very well done and look like they will last forever. Others have been brought to me in a Zip-lock bag and have a little stub of a tooth that isn't going to last long no matter who bonds it back on. 'Course there are also patients who are clenchers. They can tear up almost any dental work in short order. JME, Steve After eight years of CEREC use, I find some will "pop" off. these are the ones where I am playing the role of the "hero", and trying to coax an extra year or three out of a virtually hopeless tooth which has very little remaining solid tooth structure. If there is adequate tooth structure remaining, and the restorations "pop" off, then there is a problem in the preparation. The bonding of these restorations is extremely strong in compression and tension. However, shear strength is not so great. If the floor of the preparation is slanted, shear forces will tend to "pop" them off. This usually simply requires that the floor be reshaped, and a new restoration made. No big deal.  Signature/ Amatus / >> I am 72 years of age and have had a number of cerec restorations over >> the last 10 years. However, they frequently fall out (at about the [quoted text clipped - 17 lines] > JME, > Steve
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