One of the biggest deciding factors will be cost and not necessarily surgeon comfort, patient anatomy and track record of implant. We've had experience that if you force surgeons to change implants based on a contract that your complication rate goes up for a while. That is problematic when it occurs. So it makes good business sense until you actually go and look at your revision costs over the next months to two years and then, all of a sudden, all of your cost-savings went into pain and suffering of patients and their subsequent care. (08OTM)