And for the FH Orthopedics LP-ESP (Elastic Spine Pad) I found the following:
"The prosthesis has raised teeth, making it possible to guarantee primary fixation between the vertebrae concerned. A porous, rough HAP (hydroxyapatite) coating on the undercoat of pure titanium (T40) ensures effective secondary fixation.
Ribs, joined to the metal parts, make it possible to transform any movement of rotation between the two metal parts into compression and traction forces on the deformable inner part."
This information was found
http://www.fhorthopedics.com/lombar-disc-lp-esp.html
OR
http://www.fhorthopedics.com/index.p...action=Display