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US 10,420,655 B2Granted
Systems and techniques for restoring and maintaining intervertebral anatomy
AssigneeWarsaw Orthopedic, Inc.
InventorKevin T. Foley
Life of this patent
Estimating the term…
Abstract
Techniques and systems for distracting a spinal disc space and supporting adjacent vertebrae are provided. Trial instruments are insertable into the disc space to determine a desired disc space height and to select a corresponding implant. Implants can be also be self-distracting and the implant providing the desired disc space height can be implanted in the spinal disc space.
Claims22
A spinal implant for insertion between an upper vertebral body and a lower vertebral body, the spinal implant comprising:
- a leading end, an opposite trailing end, and a length between the leading end and the trailing end;
- a trailing end portion at and adjacent the leading end and a trailing end surface formed on the trailing end portion, the trailing end surface being substantially planar,
- a leading end portion at and adjacent the trailing end and a leading end surface formed on the leading end portion,
- a mid-longitudinal axis extending along the length through the trailing end surface and the leading end surface,
- an upper surface extending between the trailing end portion and the leading end portion, the upper surface being orientable toward an end plate of the upper vertebral body when the spinal implant is inserted between the upper and lower vertebral bodies,
- a lower surface extending between the trailing end portion and the leading end portion, the lower surface being orientable toward an end plate of the lower vertebral body when the spinal implant is inserted between the upper and lower vertebral bodies, and
- a first lateral surface and a second lateral surface, each of the first lateral surface and the second lateral surface being opposite from one another and extending between the trailing end portion and the leading end portion,
- wherein a first plane extends through the trailing end portion, the leading end portion, the upper surface, the lower surface, and the mid-longitudinal axis, and along the length, the leading end surface being curved in the first plane,
- wherein the leading end portion extends from a second plane to the leading end surface, the second plane being perpendicular to the mid-longitudinal axis and the first plane, extending through the upper surface, the lower surface, the first lateral surface, and the second lateral surface, and being disposed between the trailing end surface and the leading end surface,
- wherein the leading end portion includes a first transition surface extending from the upper surface to the leading end surface, and a second transition surface extending from the lower surface to the leading end surface, distances between the first transition surface and the second transition surface in planes perpendicular to the mid-longitudinal axis decreasing from the second plane to the leading end surfaces;
- and
- wherein the leading end surface extends between a third plane and a fourth plane, the third plane and the fourth plane being parallel to the mid-longitudinal axis and perpendicular to the first lane and the second plane, the distance between the third plane and the fourth plane at the intersection with the second plane being less than one fourth of a distance between the upper surface and the lower surface in the second plane.
9 more elements
A spinal implant for insertion between an upper vertebral body and a lower vertebral body, the spinal implant comprising:
- a leading end, an opposite trailing end, and a length between the leading end and the trailing end;
- a trailing end portion at and adjacent the leading end and a trailing end surface formed on the trailing end portion, the trailing end surface being substantially planar,
- a leading end portion at and adjacent the trailing end and a leading end surface formed on the leading end portion,
- a mid-longitudinal axis extending along the length through the trailing end surface and the leading end surface,
- an upper surface extending between the trailing end portion and the leading end portion, the upper surface being orientable toward an end plate of the upper vertebral body when the spinal implant is inserted between the upper and lower vertebral bodies,
- a lower surface extending between the trailing end portion and the leading end portion, the lower surface being orientable toward an end plate of the lower vertebral body when the spinal implant is inserted between the upper and lower vertebral bodies, and
- a first lateral surface and a second lateral surface, each of the first lateral surface and the second lateral surface being opposite from one another and extending between the trailing end portion and the leading end portion,
- wherein a first plane extends through the trailing end portion, the leading end portion, the upper surface, the lower surface, and the mid-longitudinal axis, and along the length, the leading end surface being curved in the first plane,
- wherein the leading end portion extends from a second plane to the leading end surface, the second plane being perpendicular to the mid-longitudinal axis and the first plane, extending through the upper surface, the lower surface, the first lateral surface, and the second lateral surface, and being disposed between the trailing end surface and the leading end surface,
- wherein the leading end portion includes a first transition surface extending from the upper surface to the leading end surface, and a second transition surface extending from the lower surface to the leading end surface, distances between the first transition surface and the second transition surface in planes perpendicular to the mid-longitudinal axis decreasing from the second plane to the leading end surface;
- wherein the leading end surface extends between a third plane and a fourth plane, the third plane and the fourth plane being parallel to the mid-longitudinal axis and perpendicular to the first plane and the second plane, the distance between the third plane and the fourth plane at the intersection with the second plane being less than one fourth of a distance between the upper surface and the lower surface in the second plane;
- and
- wherein the leading end surface extends from a fifth plane to the leading end, the fifth plane being perpendicular to the mid-longitudinal axis and the first plane, the first transition surface and the second transition surface terminating at the fifth plane, and the leading end surface being shaped as a half circle in the first plane from the fifth plane to the leading end.
10 more elements
A spinal implant for insertion between an upper vertebral body and a lower vertebral body, the spinal implant comprising:
- a leading end, an opposite trailing end, and a length between the leading end and the trailing end;
- a trailing end portion at and adjacent the leading end and a trailing end surface formed on the trailing end portion, the trailing end surface being substantially planar,
- a leading end portion at and adjacent the trailing end and a leading end surface formed on the leading end portion,
- a mid-longitudinal axis extending along the length through the trailing end surface and the leading end surface,
- an upper surface extending between the trailing end portion and the leading end portion, the upper surface being orientable toward an end plate of the upper vertebral body when the spinal implant is inserted between the upper and lower vertebral bodies,
- a lower surface extending between the trailing end portion and the leading end portion, the lower surface being orientable toward an end plate of the lower vertebral body when the spinal implant is inserted between the upper and lower vertebral bodies, and
- a first lateral surface and a second lateral surface, each of the first lateral surface and the second lateral surface being opposite from one another and extending between the trailing end portion and the leading end portion,
- wherein a first plane extends through the trailing end portion, the leading end portion, the upper surface, the lower surface, and the mid-longitudinal axis, and along the length, the leading end surface being curved in the first plane,
- wherein the leading end portion extends from a second plane to the leading end surface, the second plane being perpendicular to the mid-longitudinal axis and the first plane, extending through the upper surface, the lower surface, the first lateral surface, and the second lateral surface, and being disposed between the trailing end surface and the leading end surface,
- wherein the leading end portion includes a first transition surface extending from the upper surface to the leading end surface, and a second transition surface extending from the lower surface to the leading end surface, distances between the first transition surface and the second transition surface in planes perpendicular to the mid-longitudinal axis decreasing from the second plane to the leading end surface;
- wherein the leading end surface extends between a third plane and a fourth plane, the third plane and the fourth plane being parallel to the mid-longitudinal axis and perpendicular to the first plane and the second plane, the distance between the third plane and the fourth plane at the intersection with the second plane being less than one fourth of a distance between the upper surface and the lower surface in the second plane;
- wherein the leading end surface extends from a fifth plane to the leading end, the fifth plane being perpendicular to the mid-longitudinal axis and the first plane, the first transition surface and the second transition surface terminating at the fifth plane, and the leading end surface being shaped as a half circle in the first plane from the fifth plane to the leading end;
- and
- wherein the distance between the fifth plane to the leading end is at least one third of the length between the leading end and the trailing end.
11 more elements
Dependencies are inferred from the claim text.