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US 10,945,858 B2Granted
Expandable interspinous process fixation device
AssigneeGlobus Medical, Inc.
InventorsMatthew Bechtel, Hilliary Kopp
Life of this patent
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Abstract
An expandable interspinous process fixation system capable of restoring spinal stability and facilitating fusion. In one embodiment, the expandable interspinous process fixation system includes a central ramp, a first endplate, and a second endplate, the central ramp capable of being moved in a first direction to move the first and second endplates outwardly and into an expanded configuration. Each endplate supporting fixed and/or adjustable spinous process engaging plates.
Claims11
An apparatus comprising:
- a first endplate comprising a first plate portion having a first upper surface and a first lower surface, wherein the first endplate further comprises first front ramped portions extending away from the first lower surface and first rear ramped portions extending away from the first lower surface, the first endplate having a first lateral adjustment arm extending from a first edge thereof;
- a second endplate comprising a second plate portion having a second upper surface and a second lower surface, wherein the second endplate further comprises second front ramped portions extending away from the second lower surface and second rear ramped portions extending away from the second lower surface, the second endplate having a second lateral adjustment arm extending from a first edge thereof;
- a first fixed plate extending along a second edge of the first endplate opposite the first edge thereof, the first fixed plate extending substantially perpendicular and non-adjustably fixed to the first endplate and having an inner surface defining a first spinous process engaging surface;
- a second fixed plate extending along a second edge of the second endplate opposite the first edge thereof, the second fixed plate extending substantially perpendicular and non-adjustably fixed to the second endplate and having an inner surface defining a second spinous process engaging surface;
- a first sliding plate adjustably mounted on the first lateral adjustment arm such that the first sliding plate extends substantially perpendicular to the first endplate and has an inner surface defining a third spinous process engaging surface;
- a second sliding plate adjustably mounted on the second lateral adjustment arm such that the second sliding plate extends substantially perpendicular to the second endplate and has an inner surface defining a fourth spinous process engaging surface;
- a central ramp positioned between the first endplate and the second endplate, wherein a body of the central ramp comprises rear endplate engaging ramps;
- and
- a driving ramp positioned between the first endplate and the second endplate, wherein the driving ramp comprises front endplate engaging ramps;
- wherein the apparatus is configured such that movement of the central ramp and the driving ramp toward one another causes the first and second endplates to move apart wherein the first lateral adjustment arm and the second lateral adjustment arm includes a first retaining element and a second retaining element,
- wherein the first retaining element and the second retaining elements engage with the first and second sliding plates, respectively
- wherein each sliding plate has a receiving bore configured to slidably receive the respective lateral adjustment arm,
- wherein each sliding plate includes a through bore in communication with the receiving bore such that a set screw threadably adjustable in the through bore is configured to engage the lateral adjustment arm received in the receiving bore.
10 more elements
An apparatus comprising:
- a first endplate having a first lateral adjustment arm extending from a first edge thereof;
- a second endplate having a second lateral adjustment arm extending from a first edge thereof;
- a first fixed plate extending along a second edge of the first endplate opposite the first edge thereof, the first fixed plate extending substantially perpendicular and non-adjustably fixed to the first endplate and having an inner surface defining a first spinous process engaging surface;
- a second fixed plate extending along a second edge of the second endplate opposite the first edge thereof, the second fixed plate extending substantially perpendicular and non-adjustably fixed to the second endplate and having an inner surface defining a second spinous process engaging surface;
- a first sliding plate adjustably mounted on the first lateral adjustment arm such that the first sliding plate extends substantially perpendicular to the first endplate and has an inner surface defining a third spinous process engaging surface;
- a second sliding plate adjustably mounted on the second lateral adjustment arm such that the second sliding plate extends substantially perpendicular to the second endplate and has an inner surface defining a fourth spinous process engaging surface;
- an expansion assembly positioned between the first and second endplates;
- the expansion assembly configured to selectively cause the first and second endplates to move apart,
- wherein the first lateral adjustment arm and the second lateral adjustment arm includes a first retaining element and a second retaining element,
- wherein the first retaining element and the second retaining elements engage with the first and second sliding plates, respectively
- wherein each sliding plate has a receiving bore configured to slidably receive the respective lateral adjustment arm,
- wherein each sliding plate includes a through bore in communication with the receiving bore such that a set screw threadably adjustable in the through bore is configured to engage the lateral adjustment arm received in the receiving bore.
9 more elements
Dependencies are inferred from the claim text.