The Cadisc-L disc disaster illustrates the need for rigorous clinical trials

 
 
The Cadisc-L from Ranier Technology is a polyurethane-polycarbonate graduated modulus spinal disc implant with physiological, progressive bending stiffness. The implant has a mobile center of rotation for load sharing biomechanics and is well seen on MRI or x-ray.
The surface of the implant has a macro- and micro-texture with a CaPO4 coating for osseointegration.

Report: Folded Ranier Tech’s spinal implants cleared in EU after tiny trial, found to dissolve in patients (MassDevice)
Plastic spinal implants from now-defunct Ranier Technology are allegedly moving and dissolving in...