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US 7,326,251 B2Granted
Interbody fusion device
AssigneeSDGI Holdings, Inc.
InventorsPeter McCombe, B. Thomas Barker, William Sears, David Warmbold, Russell Powers
Life of this patent
Estimating the term…
Abstract
An interbody spacer includes concave lateral surfaces extending at an angle with respect to the longitudinal axis. In one aspect, the interbody spacer includes upper and lower convex surfaces defined by an arc extending from a center point offset from the spacer midpoint. In another aspect, lateral edges of the upper and lower surfaces are also defined by convex arcs extending from a center point offset from the spacer midpoint.
Claims27
A spacer for positioning between adjacent vertebrae, comprising:
- an elongated central body portion having a front end, a rear end and a central longitudinal axis extending between said front end and said rear end,
- a convex top surface extending along said longitudinal axis adapted for placement against an upper vertebra, the top surface having an arc of convexity extending between the front end and rear end;
- an opposing bottom surface extending along said longitudinal axis configured for placement against a lower vertebra,
- a first lateral surface positioned between said top surface and said bottom surface, a first majority of the first lateral surface being concave with a vertical arc of concavity extending substantially from the top surface to the bottom surface;
- and
- an opposite second lateral surface positioned between said top surface and said bottom surface, a second majority of the second lateral surface being concave with a vertical arc of concavity extending substantially from the top surface to the bottom surface;
- wherein said first majority of the first lateral surface and said second majority of the second lateral surface each extend longitudinally at a non-parallel angle with respect to said central longitudinal axis;
- wherein a height extending between the top and bottom surfaces is greater than a width extending between the first and second lateral surfaces at each point along the longitudinal axis of the spacer.
5 more elements
A spacer for positioning between two adjacent vertebrae, comprising:
- a convex front surface;
- a substantially planar rear surface positioned opposite the front surface;
- a convex top surface extending between the front and rear surfaces;
- a convex bottom surface opposite the top surface, the bottom surface extending between the front and rear surfaces;
- a first concave side surface extending between the front and rear surfaces and extending between the top and bottom surfaces;
- and
- a second concave side surface opposite the first side surface, the second side surface extending between the front and rear surfaces and extending between the top and bottom surfaces;
- wherein the first and second concave side surfaces extend at an oblique angle with respect to one another.
5 more elements
A spacer for positioning between two adjacent vertebrae, comprising:
- a convex front surface;
- a substantially planar rear surface positioned opposite the front surface;
- a convex top surface extending between the front and rear surfaces;
- a convex bottom surface opposite the top surface, the bottom surface extending between the front and rear surfaces;
- a first concave side surface extending between the front and rear surfaces and extending between the top and bottom surfaces;
- and
- a second concave side surface opposite the first side surface, the second side surface extending between the front and rear surfaces and extending between the top and bottom surfaces;
- wherein the spacer has a height between the top surface and the bottom surface that is greater than a maximum width between the first side surface and the second side surface;
- and
- wherein the top surface has an arc of convexity extending between the front surface to the rear surface.
7 more elements
An intervertebral spacer, comprising:
- a convex front surface;
- a substantially planar rear surface positioned opposite the front surface;
- a convex upper surface extending between the front and rear surfaces, an upper front edge extending between the upper surface and the front surface and an upper rear edge extending between the upper surface and the rear surface;
- a convex lower surface opposite the upper surface, the lower surface extending between the front and rear surfaces, a lower front edge extending between the lower surface and the front surface and a lower rear edge extending between the lower surface and the rear surface;
- a first concave side surface extending between the front and rear surfaces and extending between the upper and lower surfaces, a first side front edge extending between the first side surface and the front surface, a first side rear edge extending between the first side surface and the rear surface, a first side lower edge extending between the first side surface and the lower surface;
- and a first side upper edge extending between the first side surface and the upper surface;
- and
- a second concave side surface opposite the first side surface, the second side surface extending between the front and rear surfaces and extending between the upper and lower surfaces, a second side front edge extending between the second side surface and the front surface, a second side rear edge extending between the second side surface and the rear surface, a second side lower edge extending between the second side surface and the lower surface;
- and a second side upper edge extending between the second side surface and the upper surface;
- wherein the first and second concave side surfaces extend at an oblique angle with respect to one another.
7 more elements
An intervertebral spacer, comprising:
- a convex front surface;
- a rear surface positioned opposite the front surface;
- a convex upper surface extending between the front and rear surfaces, an upper front edge extending between the upper surface and the front surface and an upper rear edge extending between the upper surface and the rear surface;
- a convex lower surface opposite the upper surface, the lower surface extending between the front and rear surfaces, a lower front edge extending between the lower surface and the front surface and a lower rear edge extending between the lower surface and the rear surface;
- and
- a first concave side surface extending between the front and rear surfaces and extending between the upper and lower surfaces, a first side front edge extending between the first side surface and the front surface, a first side rear edge extending between the first side surface and the rear surface, a first side lower edge extending between the first side surface and the lower surface;
- and a first side upper edge extending between the first side surface and the upper surface
- a second concave side surface opposite the first side surface, the second side surface extending between the front and rear surfaces and extending between the upper and lower surfaces, a second side front edge extending between the second side surface and the front surface, a second side rear edge extending between the second side surface and the rear surface, a second side lower edge extending between the second side surface and the lower surface;
- and a second side upper edge extending between the second side surface and the upper surface;
- wherein the spacer has a height between the upper surface and the lower surface that is greater than a maximum width between the first side surface and the second side surface;
- wherein the first side surface has an arc of concavity extending between the upper surface and the lower surface;
- wherein the second side surface has an arc of concavity extending between the upper surface and the lower surface;
- and
- wherein the first and second side surfaces extend at a non-parallel angle with respect to each other.
11 more elements
Dependencies are inferred from the claim text.