A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/44 (2006.01) A61F 2/30 (2006.01) A61F 2/46 (2006.01) A61B 19/00 (2006.01) A61F 2/00 (2006.01) A61F 2/28 (2006.01)
Patent
CA 2122336
Surgical prosthetic modular implants (10, 20, 30, 40) used singularly or stacket together are provided to support and fuse together adjacent verte- brae or to totally or partially replace one or more vertebrae in a vertebral co- lumn. The implants are rigid annular plugs (11, 21, 31, 41), dimensionally si- milar to normal vertebral bodies, have simplified oval or semi-oval shapes with ridged faces (12, 16, 22, 42) to engage adjacent vertebral bodies to resist displacement and allow bone ingrowth and fusion and to interdigitate with the ridges of an adjacent plug for modular stacking to allow variability of ul- timate implant height. The implants can be provided in sets of different thicknesses and are internally grooved (24) to receive an upstanding con- necting bar (15) to bind together the individual stacked implants into a stable unit (17, 25, 44). The annular implants have ample spaces (11d, 11e, 211) to allow blood flow and packing of bone graft and are preferably made of a radiolucent material, preferably biocompatible carbon fiber reinforced polymers or are alternately made of traditional or thopaedic implant materi- als such as nickel, chromium, cobalt, stainless steel or titanium.
Brantigan John W.
Cassan Maclean
Depuy Acromed Inc.
LandOfFree
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