Transverse fixation device for a spinal osteosynthesis system
AssigneeSofamore Danek Group
InventorYves P. Cotrel
Life of this patent
Estimating the term…
Abstract
This device comprises two fixation elements (4), each consisting of a hook (4) designed so as to be able to cover a rigid transverse bar (3) in a sliding manner and equipped with means (9, 8) for locking on the bar (3); this hook is made up of a body (5) and of two blades (6) spaced apart by a distance (d) of a width corresponding to that of the bar (3), and a span (7) for the hook to bear on the bar is made on the body (5) between the blades (6), which blades extend on each side of the bar when the hook straddles the latter. Two hooks (4), combined with a rectangular bar (3), form a relatively simple transverse connection device which can be positioned quickly and which has great torsional and flexural strength.
Claims27
A spinal osteosynthesis system, comprising:
- a spinal rod configured to be implanted on a spinal segment;
- a transverse bar;
- and
- a fixation element including;
- a body;
- and
- a bifurcated hook portion attached to said body, said hook portion defining two hook-shaped blades extending outwardly from said body and defining a first surface for engaging the rod, said blades being spaced apart along their outward extension a distance at least equal to a width of the transverse bar, and
- said body defining a second surface between said blades configured to slidingly engage a corresponding side of the transverse bar when the bar is fully seated between said blades.
A spinal osteosynthesis system, comprising:
- a pair of spinal rods each configured to be implanted on a spinal segment;
- a transverse fixation device, including,
- a rigid transverse bar, and
- a pair of fixation elements, each of said fixation elements including a body and a bifurcated hook portion, said hook portion defining two hook-shaped blades extending outwardly from said body for engaging the rod, said blades being spaced apart an equal distance from one another along their outward extension so that they are parallel and correspond to a width of said rigid transverse bar, and said body defining a planar surface between said blades configured to slidingly engage a corresponding planar side of said transverse bar when the bar is fully seated between said blades;
- said transverse fixation device providing a rigid transverse connection between said rods when each of said fixation elements are engaged to the bar and a corresponding one of said rods.
A spinal osteosynthesis system, comprising:
- a first elongate member configured to be implanted on a spinal segment;
- a second elongate member configured to be implanted on a spinal segment;
- a transverse fixation device, including;
- a body;
- and
- a bifurcated hook portion extending from said body, said hook portion defining two hook-shaped blades spaced apart to receive the first elongate member, said hook-shaped blades having a first bearing surface facing said body and configured to receive the second elongate member,
- wherein said body defines a second bearing surface spanning between said blades configured to receive the first elongate member such that the first elongate member is engageable between said second surface and the second elongate member.
A spinal osteosynthesis system including a fixation element for connection between a spinal rod and a transverse bar of a transverse fixation device, said fixation element comprising:
- a body;
- and
- a bifurcated hook portion attached to said body, said hook portion defining two hook-shaped blades extending outwardly from said body and defining a first surface for engaging the rod, said first surface configured to conform to a portion of an outer surface of the rod, said blades being spaced apart along their outward extension a distance at least equal to a width of the transverse bar, and
- said body defining a second surface between said blades configured to slidingly engage a corresponding side of the transverse bar when the bar is fully seated between said blades, said second surface configured to conform to a portion of an outer surface of the bar.
A transverse fixation device for insuring a rigid transverse connection between two rods of a spinal osteosynthesis system, comprising in combination:
- a rigid transverse bar, and
- a pair of fixation elements, each of said fixation elements including a body and a bifurcated hook portion,
- said hook portion defining two hook-shaped blades extending outwardly from said body and configured to conform to a portion of an outer surface of one of said rods,
- said blades being spaced apart an equal distance from one another along their outward extension so that they are parallel and correspond to a width of said rigid transverse bar, and
- said body defining a planar surface between said blades configured to slidingly engage a corresponding planar side of said transverse bar when the bar is fully seated between said blades.
A transverse fixation device for connecting a first and a second elongate member of a osteosynthesis system, comprising:
- a body;
- and
- a bifurcated hook portion extending from said body, said hook portion defining two hook-shaped blades spaced apart to receive the first elongate member, said hook-shaped blades having a first surface facing said body and configured to receive the second elongate member, said first surface configured to conform to a portion of an outer surface of the second elongate member;
- and
- wherein said body defines a second surface spanning between said blades configured to receive the first elongate member, said second surface configured to conform to a portion of an outer surface of the first elongate member such that the first elongate member is engageable between said second surface and the second elongate member.
Dependencies are inferred from the claim text.