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US 2019/0240043 A1Published application
Fixation device and method
AssigneeStout Medical Group, L.P.
InventorE. Skott GREENHALGH
Life of this patent
Estimating the term…
Abstract
An implantable orthopedic stability device is disclosed. The device can have a contracted and an expanded configuration. A method of using the device between adjacent facet surfaces for support and/or fixation of either or both of the adjacent vertebrae is also disclosed.
Claims20
An implantable orthopedic device, comprising:
- a first plate, having an outward-facing surface facing away from said device and an inward-facing surface opposed to said outward-facing surface, and having a plate longitudinal direction;
- a second plate opposed to the first plate;
- and
- a mechanism located between the first and second plates, the mechanism being capable of causing relative motion of the first and second plates toward or away from each other;
- wherein the first plate comprises, on the inward-facing surface of the first plate, a planar ramp surface, the planar ramp surface having a ramp direction inclined at an oblique ramp angle with respect to the plate longitudinal direction;
- wherein the oblique ramp angle with respect to the plate longitudinal direction is from 15 degrees to 75 degrees;
- wherein the planar ramp surface is bounded on respective sides by respective first and second grooves;
- and
- wherein each groove defines a slot with an opening that faces toward a longitudinal center of the device;
- wherein the ramp surface and the first and second grooves in combination engage and capture a geometric feature of the mechanism while permitting sliding of the geometric feature relative to the planar ramp surface along the ramp direction;
- and
- wherein an inward-facing surface of the second plate has a planar guide surface parallel to the plate longitudinal direction.
9 more elements
An implantable orthopedic device, comprising:
- a first plate, having an outward-facing surface facing away from the device and an inward-facing surface opposed to the outward-facing surface, and having a plate longitudinal direction;
- a second plate opposed to the first plate;
- and
- a mechanism located between the first and second plates, the mechanism being capable of causing relative motion of the first and second plates toward or away from each other, wherein the mechanism has a locking reception configuration at a proximal terminal end of the mechanism, the device further comprising a locking element configured to rotate with respect to the first plate and the second plate;
- wherein the first plate comprises, on the inward-facing surface of the first plate, a planar ramp surface, wherein the planar ramp surface is inclined at an oblique ramp angle with respect to the plate longitudinal direction and defining a ramp direction, and wherein the oblique ramp angle ramp angle is from 15 degrees to 75 degrees;
- wherein the ramp surface the second plate in combination engage and capture the mechanism while permitting sliding of the mechanism relative to the planar ramp surface along the ramp direction;
- and
- wherein the first plate has a centrally located first opening therethrough and the second plate has a centrally located second opening therethrough and wherein a window region of space connecting the first opening and the second opening is not crossed by any object extending within the window region continuously from a proximal edge of the window region to a distal edge of the window region.
5 more elements
An implantable orthopedic device, comprising:
- a first plate, having an outward-facing surface facing away from the device and an inward-facing surface opposed to the outward-facing surface, and having a plate longitudinal direction;
- a second plate opposed to the first plate;
- and
- a mechanism located between the first and second plates, the mechanism being capable of causing relative motion of the first and second plates toward or away from each other;
- wherein the first plate comprises, on the inward-facing surface of the first plate, a planar ramp surface bounded by two edges that are parallel to each other and generally coplanar with each other, the planar ramp surface having a ramp direction centerline midway between the two parallel edges, the centerline inclined at an oblique ramp angle with respect to the plate longitudinal direction and defining a ramp direction, and wherein the oblique ramp angle ramp angle is from 15 degrees to 75 degrees;
- wherein, on each side, the planar ramp surface adjoins respective first side surfaces distinct from the planar ramp surface;
- wherein the respective first side surfaces adjoin respective planar second surfaces distinct from the first side surfaces, the respective planar second surfaces being parallel to the planar ramp surface;
- wherein the respective second surfaces adjoin respective third surfaces distinct from the second side surfaces;
- wherein the planar ramp surface and the first side surfaces and the second surfaces and the third surfaces in combination engage and capture a geometric feature of the mechanism while permitting sliding of the geometric feature relative to the planar ramp surface along the ramp direction;
- wherein the first plate has a centrally located first opening therethrough and the second plate has a centrally located second opening therethrough and wherein a window region of space connecting the first opening and the second opening is not crossed by any object extending within the window region continuously from a proximal edge of the window region to a distal edge of the window region;
- wherein the second plate comprises, on an inward-facing surface of the second plate, a planar guide surface parallel to the plate longitudinal direction;
- and
- wherein the planar guide surface is bounded on respective sides by respective first and second grooves.
10 more elements
Dependencies are inferred from the claim text.