Hello All, I've just found information on an investigation about DePuy's Charite Artificial Disc. Apparently there have been reports that the artificial disc can migrate from its original location or the plates can grind against each other, causing tearing and disc fragments to be released into the body. It also said that there may be a defect in the center of rotation that can cause instability of the spine. The information on the investigation said that the Centers for Medicare and Medicaid Services has preliminarily determined it will not cover implantation of the Charite Artificial Disc. You can read about that at http://www.cms.hhs.gov/mcd/viewdraftdecisionmemo.asp?id=170. If you or someone you know has had one of these discs implanted, you should check out http://www.hbsslaw.com/DePuy_Investigation.htm for more info.