Spinal fixation tool attachment structure
First Claim
1. In the combination of a bone attachment structure having a receiver and a tool having receiver attachment structure at a lower end thereof that is operably mateable with the receiver;
- the improvement comprising;
a) the receiver having a top, a bottom, and an undercut first surface projecting downwardly toward the bottom;
b) the tool lower end having a projection with a second surface for mechanical overlapping and interlocking mating with the first surface; and
c) the first and second surfaces being sized, shaped and positioned to provide for anti-splay arrangement of the tool with respect to the receiver when the second surface is aligned with the undercut first surface of the receiver.
2 Assignments
0 Petitions
Accused Products
Abstract
A tool set for implanting bone screws in a human spine, followed by the implantation of a rod into the bone screws includes end guide tools having flexible back wall flaps that receive opposite ends of the rod and intermediate guide tools that hold the rod in intermediate locations between the end guide tools. Both the end and intermediate guide tools include an attachment structure for operably connecting the guide tool to a bone screw. The attachment structure includes an undercut and/or recess so as to resist splaying and separation of the guide tool from an attached bone screw.
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Citations
12 Claims
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1. In the combination of a bone attachment structure having a receiver and a tool having receiver attachment structure at a lower end thereof that is operably mateable with the receiver;
- the improvement comprising;
a) the receiver having a top, a bottom, and an undercut first surface projecting downwardly toward the bottom;
b) the tool lower end having a projection with a second surface for mechanical overlapping and interlocking mating with the first surface; and
c) the first and second surfaces being sized, shaped and positioned to provide for anti-splay arrangement of the tool with respect to the receiver when the second surface is aligned with the undercut first surface of the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- the improvement comprising;
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9. In the combination of a bone attachment structure having a receiver and a guide tool having receiver attachment structure at a lower end thereof that is operably mateable with the receiver, the improvement comprising:
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a) the receiver having an aperture and a recess communicating with the aperture; and
b) the guide tool lower end having an inner projection, the projection having mating structure receivable in the recess for operably resisting radial splaying and separation of the tool from the receiver when joined together.
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10. In the combination of a bone screw having a head and a manipulation tool having attachment structure at a lower end thereof that is operably mateable with the bone screw head;
- the improvement comprising;
a) the bone screw head having a top, a bottom, and a circumferentially extending undercut first surface facing downwardly toward said bottom;
b) the manipulation tool lower end having a projection with a circumferentially extending second surface; and
c) the first and second surfaces being sized, shaped and positioned to provide for operable mating overlapping alignment of the manipulation tool relative to the bone screw head. - View Dependent Claims (11)
- the improvement comprising;
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12. In a medical implant having a head, the improvement wherein the head has an outer surface defining an aperture communicating with an undercut disposed in the head, the undercut adapted to receive a manipulation tool structure.
Specification