Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
First Claim
1. A vertebral body replacement device comprising:
- a body member having an inner wall, an outer wall, and a Longitudinal axis, the body member having at least one tool port extending from the outer wall through the inner wall and toward the Longitudinal axis of the body member;
a central rod member having a first threaded portion and a second threaded portion, the central rod member being configured to be operatively associated within the body member, the central rod member comprising a gear wheel portion, the gear wheel portion having a toothed surface and a support surface, the toothed surface exposed through the at least one tool port when the central rod member is operatively associated within the body member;
a first end member and a second end member, the first end member being configured to threadingly engage the first threaded portion of the central rod member and the second end member being configured to threadingly engage the second threaded portion of the central rod member; and
wherein the body member, and first and second end members are configured to inhibit rotational movement of the first and second end members when the vertebral body replacement device is disposed within a space within a spinal column with the first and second end members engaging respective vertebral bodies of the spinal column and the central rod member is rotationally actuated to move the first end member and the second end member in an axial direction relative to the body member allowing for the first end member and the second end member to apply a force to the two vertebral bodies to maintain a desired space therebetween, wherein the at least one tool port comprises a plurality of tool ports positioned in a circular arrangement around a perimeter of the body member, each tool port extending from the outer wall through the inner wall and toward the longitudinal axis of the body member, the toothed surface of the gear wheel portion exposed through the plurality of tool ports when the central rod member is operatively associated within the body member.
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Accused Products
Abstract
The vertebral body replacement device includes a body member and a central rod member that has two threaded portions and is configured to be operatively associated with the body member. The device also includes a first end member and a second end member with the end members being configured to threadingly engage the threaded portions of the central rod member. The body member and the two end members are further constructed to inhibit rotational movement of the two end members when the device is positioned within a space within a spine as the two end members will engage the adjacent respective vertebral bodies following rotational actuation of the central rod member causing the end members to move in an axial direction relative to the body member, thereby allowing the two end members to apply a force to the two vertebral bodies. A surgical method using the device is also disclosed.
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Citations
20 Claims
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1. A vertebral body replacement device comprising:
- a body member having an inner wall, an outer wall, and a Longitudinal axis, the body member having at least one tool port extending from the outer wall through the inner wall and toward the Longitudinal axis of the body member;
a central rod member having a first threaded portion and a second threaded portion, the central rod member being configured to be operatively associated within the body member, the central rod member comprising a gear wheel portion, the gear wheel portion having a toothed surface and a support surface, the toothed surface exposed through the at least one tool port when the central rod member is operatively associated within the body member;
a first end member and a second end member, the first end member being configured to threadingly engage the first threaded portion of the central rod member and the second end member being configured to threadingly engage the second threaded portion of the central rod member; and
wherein the body member, and first and second end members are configured to inhibit rotational movement of the first and second end members when the vertebral body replacement device is disposed within a space within a spinal column with the first and second end members engaging respective vertebral bodies of the spinal column and the central rod member is rotationally actuated to move the first end member and the second end member in an axial direction relative to the body member allowing for the first end member and the second end member to apply a force to the two vertebral bodies to maintain a desired space therebetween, wherein the at least one tool port comprises a plurality of tool ports positioned in a circular arrangement around a perimeter of the body member, each tool port extending from the outer wall through the inner wall and toward the longitudinal axis of the body member, the toothed surface of the gear wheel portion exposed through the plurality of tool ports when the central rod member is operatively associated within the body member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a body member having an inner wall, an outer wall, and a Longitudinal axis, the body member having at least one tool port extending from the outer wall through the inner wall and toward the Longitudinal axis of the body member;
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12. A vertebral body replacement device comprising:
- a body member, wherein the body member is an elongate body having an inner wall and an outer wall, and comprising a first end receptacle, a second end receptacle and a longitudinal axis extending between the first end receptacle and the second end receptacle thereof, the body member having at least one tool port extending from the outer wall through the inner wall and toward the longitudinal axis of the body member;
a central rod member having a first threaded portion, a second threaded portion and a central axis extending therebetween, the central rod member being configured to be operatively associated with the body member, the central rod member comprising a gear wheel portion, the gear wheel portion having a toothed surface and a support surface;
a first end member and a second end member, wherein the first end member is configured to be positioned within the first end receptacle of the body member to threadingly engage the first threaded portion of the central rod member when the central rod member is operatively associated with the body member, and the second end member is configured to be positioned within the second end receptacle of the body member to threadingly engage the second threaded portion of the central rod member when the central rod member is operatively associated with the body member;
at least one footplate member, wherein the at least one footplate member includes an end surface and a sidewall, the end surface being positioned adjacent to the sidewall, and wherein the at least one footplate couples to at least one of the first end member and the second end member with the end surface being sized and configured to engage a vertebral body; and
wherein the body member, and first and second end members are configured to inhibit rotational movement of the first and second end members when the vertebral body replacement device is disposed within a space within a spinal column with the first and second end members engaging respective vertebral bodies of the spinal column and the central rod member is rotationally actuated to move the first end member and the second end member in an axial direction relative to the body member allowing for the first end member and the second end member to apply a force to the two vertebral bodies, wherein the at least one tool port comprises a plurality of tool ports positioned in a circular arrangement around a perimeter of the body member, each tool port extending from the outer wall through the inner wall and toward the longitudinal axis of the body member, the toothed surface of the gear wheel portion exposed through the plurality of tool ports when the central rod member is operatively associated within the body member. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
- a body member, wherein the body member is an elongate body having an inner wall and an outer wall, and comprising a first end receptacle, a second end receptacle and a longitudinal axis extending between the first end receptacle and the second end receptacle thereof, the body member having at least one tool port extending from the outer wall through the inner wall and toward the longitudinal axis of the body member;
Specification