Expandable vertebral prosthesis
First Claim
1. An expandable prosthetic implant device for engagement between vertebrae, comprising:
- an inner member having a hollow interior portion and a threaded external portion and including a first end portion configured to engage a first vertebral body;
an outer member having a hollow interior portion configured to coaxially receive the inner member therein and including a second end portion configured to engage a second vertebral body, wherein the inner and outer members are moveable relative to each other along a longitudinal axis;
a gear member positioned coaxial to the inner member and outer member and axially fixed to the outer member and freely rotatable with respect to the outer member, wherein the gear member threadedly engages the threaded portion of the inner member, wherein the implant is configured to engage the vertebrae such that first and second end portions are oriented in a predetermined alignment with respect to the first and second vertebral bodies, wherein the gear member includes gear teeth extending around the perimeter of the gear member, the gear teeth exposed to the exterior and configured to be accessible by a tool member at a plurality of angular positions around the perimeter.
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Accused Products
Abstract
The present invention relates to an expandable prosthetic implant device for engagement between vertebrae generally comprising an inner member, outer member, and gear member positioned coaxial with respect to each other such that the inner and outer members are moveable relative to each other along an axis. The gear member is axially fixed to the outer member and freely rotatable with respect to the outer member and the gear member threadedly engages a threaded portion of the inner member to translate inner member along the axis. The implant is configured to engage the vertebrae in a predetermined alignment and the gear member includes gear teeth exposed to the exterior and configured to be accessible by a tool member at a plurality of angular positions around the perimeter of the implant device.
518 Citations
22 Claims
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1. An expandable prosthetic implant device for engagement between vertebrae, comprising:
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an inner member having a hollow interior portion and a threaded external portion and including a first end portion configured to engage a first vertebral body;
an outer member having a hollow interior portion configured to coaxially receive the inner member therein and including a second end portion configured to engage a second vertebral body, wherein the inner and outer members are moveable relative to each other along a longitudinal axis;
a gear member positioned coaxial to the inner member and outer member and axially fixed to the outer member and freely rotatable with respect to the outer member, wherein the gear member threadedly engages the threaded portion of the inner member, wherein the implant is configured to engage the vertebrae such that first and second end portions are oriented in a predetermined alignment with respect to the first and second vertebral bodies, wherein the gear member includes gear teeth extending around the perimeter of the gear member, the gear teeth exposed to the exterior and configured to be accessible by a tool member at a plurality of angular positions around the perimeter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An expandable prosthetic implant device for engagement between vertebrae, comprising:
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an inner member having a hollow interior portion and a threaded external portion and including a first end portion configured to engage a first vertebral body;
an outer member having a hollow interior portion configured to coaxially receive the inner member therein and including a second end portion configured to engage a second vertebral body, wherein the inner and outer members are moveable relative to each other along a longitudinal axis;
a gear member positioned coaxial to the inner member and outer member and axially fixed to the outer member and freely rotatable with respect to the outer member, wherein the gear member threadedly engages the threaded portion of the inner member, wherein the first and second end portions have a generally oblong shape when viewed along the longitudinal axis and the implant is configured to engage the vertebrae such that the first and second end portions are oriented in a predetermined alignment with respect to the first and second vertebral bodies, and wherein the gear member includes gear teeth extending around the perimeter and configured to be accessible by a tool member at a plurality of angular positions around the perimeter.
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Specification