Vertebral joint facets prostheses
AssigneePaulette Fairant
InventorJean-Raymond Martin
Life of this patent
Estimating the term…
Abstract
A device for replacing all or part of the posterior vertebral articular process (3, 13), engaging a support (7) and members for anchoring same to the vertebra, wherein each complete (5) or partial (1, 11), upper (1, 5) and/or lower (11) prosthesis mimics the anatomical shape of the posterior vertebral articular process and comprises artificial sliding surfaces (2, 12) facing one another between at least two adjacent vertebrae while adapting to the physiological orientation thereof, and the anchoring members comprise a support (7) with a convex surface matching and engaging at least one portion of the concave surface of the posterior arch of the vertebra on at least one side of the spinous process (9), and rigidly connect at least one separate portion of the support (7), to a corresponding separate portion of the vertebra.
Claims19
A prosthetic support element for a vertebral articular process for preserving the spinal stability and the potential of functional motion without damaging the spinal muscle-ligament system, comprising:
- at least one posterior support plate for rigid anchorage to a vertebra and extending against at least one portion of a posterior arch of the vertebra,
- at least one prosthetic blade carried by said support plate and extending from said support plate, said prosthetic blade including an artificial articular surface having a shape, position and orientation corresponding to the shape, position and orientation of a natural articular facet replaced by said articular surface, wherein said element has stiff anchoring means for anchoring said support plate on a transverse process and including a hook, a claw, or a clamping collar for the support plate facing said transverse process.
A vertebral articular prosthesis having a superior prosthetic element comprising at least one inferior prosthetic blade carried by and extending from a posterior support plate adapted to extend against at least one portion of a posterior arch of the superior vertebra of the joint to be fitted for rigid anchorage to said superior vertebra, said inferior prosthetic blade including an artificial articular surface having a shape, position and orientation corresponding to the shape, position and orientation of a natural articular facet a superior vertebra replaced by said articular surface,
- an inferior prosthetic element comprising at least one superior prosthetic blade carried by and extending from a posterior support plate adapted to extend against at least one portion of a posterior arch of the inferior vertebra of the joint to be fitted for rigid anchorage to said inferior vertebra, said superior prosthetic blade including an artificial articular surface having a shape position and orientation corresponding to the shape, position and orientation of a natural articular facet of said inferior vertebra replaced by said artificial articular surface (2),
- said artificial articular surfaces having interconnected shapes fitted to effect a joint between two vertebrae.
Dependencies are inferred from the claim text.