Vertebral rod for spinal osteosynthesis instrumentation and osteosynthesis instrumentation, including said rod
AssigneeSofamor S.N.C.
InventorJean Saurat
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Abstract
A vertebral rod for fixation of a spine, the rod formed of a first material and defining a passage extending at least partially therethrough, the passage at least partially filled with a second material different from the first material to thereby enable the stiffness of the rod to be varied along its length. The first and second materials are either a metallic material or a biocompatible material such as plastic. The rod may be formed of at least three layers of material, with the layers composed of at least two different materials.
Claims20
A spinal fixation system, comprising:
- a rod formed of a first material and defining a passage extending at least partially therethrough, said passage being at least partially filled with a second material different from said first material to vary the stiffness of said rod;
- and
- a number of bone anchorage implants, said implants each including a fastener for selective fixation to said rod.
A spinal fixation system, comprising:
- a rod defining a longitudinal central axis and a passage extending at least partially therethrough in a longitudinal direction, said passage being radially offset from said axis to vary stiffness of said rod;
- and
- a number bone anchorage implants, said implants each including a fastener for selective fixation to said rod.
A spinal fixation system, comprising:
- a rod having a longitudinal axis and defining a passage along only a part of its length, the rod being formed from a metallic material and the passage being at least partially filled with a core material having a stiffness different than the metallic material to correspondingly vary stiffness along the longitudinal axis.
Dependencies are inferred from the claim text.