A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
3/108
A61F 2/44 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)
Patent
CA 1328957
ABSTRACT The construction and manufacturing technique for a functional biocompatible intervertebral disc spacer is described. This device is useful for a replacement for a degenerated disc in certain treatments of back pain and spinal disease. The disc spacer possesses mechanical properties akin to those of the normal disc and will preserve normal functions of the spinal motion segment. The device achieves the desired properties by varying the hardness of the elastomeric material in its nucleus and annulus. The present invention relates to a biocompatible intervertebral spacer comprising: a central core of a soft biocompatible elastomeric material shaped and sized so as to approximate the shape and size of a nucleus pulposus of a natural intervertebral disc; an outer ring of stiffer elastomeric material surrounding said central core to approximate the size and shape of a natural annulus fibrosus; and endplates comprised of a stiff biocompatible material and affixed, one to each end, to the outer ring central core.
608600
Chen Elizabeth H.
Clemow Alastair J.
Langrana Noshir A.
Lee Casey K.
Parsons John R.
Chen Elizabeth H.
Clemow Alastair J.
Langrana Noshir A.
Lee Casey K.
Parsons John R.
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