US 8,328,852 B2Granted

Segmented insert for intervertebral support

AssigneeMazor Robotics Ltd.

InventorsEli Zehavi, Moshe Shoham

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Abstract

A spinal intervertebral support implant, for fusion or for dynamic stabilization purposes. A rod, preferably in the form of a screw, is inserted obliquely from the pedicle of an inferior vertebra into the body of a neighboring superior vertebra, through the disc space. The rod can be anchored into the body of the superior vertebra by means of a force fit or a screw thread. A pile of elements is disposed on the rod in the disc space like a pile of washers, so that the compression load between vertebrae is carried partly by these elements. These elements can be inserted through the bore through which the rod was inserted in a tightly folded configuration, and deployed into their washer-like form only when in position in the intervertebral space, such that there is no need for any additional incisions.

Claims15

Dependent claims

A method of providing support between two adjacent vertebrae of a subject, said method comprising:

providing a rod for affixing in the body of a first one of said vertebrae;
drilling a bore in the pedicle of the second vertebra adjacent said first vertebra;
inserting said rod through said bore and fixing it into the body of said first vertebra;
providing a plurality of solid elements being of a generally elongated hollow shape and having initial dimensions such that they are capable of passing through said bore, each of said elements being adapted to deploy in said intervertebral region to form an element having (a) a different shape from that before being strung onto said rod, and (b) lateral dimensions substantially larger than that of said bore;
and
stringing said elements onto said rod and into the intervertebral region, such that said elements can deploy in said intervertebral region to form a stack of elements providing intervertebral support between said two adjacent vertebrae of the subject.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/922,457Filed 15 Mar 2009 · us provisional application
Priority: 14 Mar 2008
Published: US 2011/0054538 A13 Mar 2011
Granted: 11 Dec 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

A61F 2/44
Joints: for the spine, e.g. vertebrae or spinal discs
A61F 2/4455
For the spine, e.g. vertebrae or spinal discs: for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion…
A61F 2002/30172
Concave polygonal shapes: t-shaped
A61F 2002/30433
Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements: using additional screws, bolts, dowels, rivets…