Bone fixation device and transverse linking bridge
OwnerDaniel Fizinventor
Life of this patent
Estimating the term…
Abstract
Bone fixation element and transverse linking bridge for a spinal column fixation assembly, in which the fixation element and the bridge allow to accommodate more easily the connections between the parts forming the bone fixation assembly, which would make difficult the alignment and interconnection of each of the assembly connecting parts, the fixation element comprising a hook or screw presenting an intermediate portion of spherical form that may be coupled to a seat portion of a coupling piece between the fixation element and the bar of the fixation assembly. The transverse linking bridge comprising one or two bridge parts which have at their ends a coupling hook in which a pivoting spherical insert is placed, which adjusts the deviations of the respective bar during fastening.
Claims20
The combination of a bone fixation element and coupling piece for a spinal column fixation assembly,
- said bone fixation element comprising:
- (a) a screw or hook with a portion for fixing to the bone or part thereof;
- (b) an intermediate portion that is at least partially spherical, and
- (c) a threaded upper portion,
- said coupling piece comprising:
- (a) a seat portion having a concave inner surface for receiving said at least partially spherical intermediate portion of said bone fixation element, and a convex outer surface;
- (b) a throughbore through which said threaded upper portion of said bone fixation element extends;
- (c) a nut for coupling to said bone fixation element threaded upper portion to fasten said bone fixation element to said coupling piece, and
- (d) a bar fixation portion to be coupled to a bar.
A spinal column fixation assembly comprising:
- a bone fixation element having:
- (a) a screw or hook with a portion for fixing to the bone or part thereof;
- (b) an intermediate portion, and
- (c) an upper portion,
- a coupling piece having:
- (a) a seat portion having an inner surface for receiving said intermediate portion of said bone fixation element, and an outer surface;
- (b) a throughbore through which said upper portion of said bone fixation element extends;
- (c) a fastener for coupling to said bone fixation element upper portion to fasten said bone fixation element to said coupling piece, and
- (d) a bone fixation portion to be coupled to a bar;
- a pair of bars;
- a transverse linking bridge for fixation to said bars, including at least one coupling part to form a bridge of adjustable length, the bridge including ends having a hook-shape for coupling to the respective bars of the fixation assembly, wherein at least one of said hook ends has an insert having an at least partially spherical outer surface pivotally mounted in said one hook, said insert including a fitting inner surface for each one of said bars.
A transverse linking bridge for fixation to bars of a spine fixation assembly including at least one coupling part to form a bridge of adjustable length, the bridge including ends having a hook-shape for coupling to the respective bars of the fixation assembly, wherein at least one of said hook ends has an insert having an at least partially spherical outer surface pivotally mounted in said at least one hook end, said insert including a fitting inner surface for each one of the bars of the spine fixation assembly.
Dependencies are inferred from the claim text.