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US 2022/0031372 A1Published application
Securing fasteners
AssigneeGlobus Medical, Inc.
InventorsMichael Black, Matthew Hansell, Jon Suh
Life of this patent
Estimating the term…
Abstract
A fastener, for example a bone screw, is sized to pass into an aperture of an implant, for example, a bone plate, the fastener having an anchor portion engageable with body tissue, and a head portion formed by an assembly of an insert and an anchor extension. The insert and anchor extension cooperate to form a reduced dimension passable into the aperture, and an expanded dimension not passable out of the aperture. The size of the assembly may be configurable, for example, by tabs, ramped surfaces, or an expanding diameter of a threadable insert.
Claims20
A spinal system comprising:
- an implant comprising an aperture for receiving a fastener therethrough;
- a fastener into the aperture, wherein the fastener comprises:
- a head portion including one or more resilient tabs;
- and
- an anchor portion, wherein the anchor portion is insertable into a bone member;
- and
- an insert configured to be inserted and rotated into an opening of the head portion of the fastener, wherein the insert includes a non-threaded portion with an enlarged diameter at a proximal end and a threaded portion at a distal end, the diameter of threading in the threaded portion varying between a leading end and a trailing end,
- wherein the head is configured to have a resting maximum dimension allowing for entry into the aperture and an expanded maximum dimension securing the head portion in the aperture, and
- wherein the insert is configured to engage the head in an interference fit to expand the one or more resilient tabs in the expanded maximum dimension.
6 more elements
A spinal system comprising:
- a plate member having an aperture against a bone member;
- a fastener comprising:
- a head portion including one or more resilient tabs;
- and
- an anchor portion, wherein the anchor portion is insertable into a bone member;
- and
- an insert configure to be inserted and rotated into an opening of the head portion of the fastener, wherein the insert includes a non-threaded portion with an enlarged diameter at a proximal end and a threaded portion at a distal end, the diameter of threading in the threaded portion varying between a leading end and a trailing end,
- wherein the head is configured to have a resting maximum dimension allowing for entry into the aperture and an expanded maximum dimension securing the head portion in the aperture, and
- wherein the insert is configured to engage the head in an interference fit to expand the one or more resilient tabs in the expanded maximum dimension.
6 more elements
Dependencies are inferred from the claim text.