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 hollow, cylindrical body member having an outer wall with at least one tool portdefined therein and an end receptacle extending in a first direction along a longitudinal axis of the body member;
a modular end member which slidingly engages the end receptacle, a first end of the modular end member facing away from the body member and having a circular projection extending therefrom, the circular projection encompassing the longitudinal axis and having an annular groove defined therein;
a footplate having an annular inner wall which defines a central opening extending through the footplate, an annular slot defined in the inner wall of the footplate and opposing the annular groove when the footplate is positioned on the circular projection of the modular end member; and
a snap ring disposed in an aperture defined by the annular groove and the annular slot opposing each other, the snap ring detachably coupling the footplate to the end member.
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Accused Products
Abstract
A vertebral body replacement device includes a body member and a central rod member having two threaded portions and 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 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 instrument and method for using the device are also disclosed.
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Citations
17 Claims
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1. A vertebral body replacement device comprising:
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a hollow, cylindrical body member having an outer wall with at least one tool port defined therein and an end receptacle extending in a first direction along a longitudinal axis of the body member; a modular end member which slidingly engages the end receptacle, a first end of the modular end member facing away from the body member and having a circular projection extending therefrom, the circular projection encompassing the longitudinal axis and having an annular groove defined therein; a footplate having an annular inner wall which defines a central opening extending through the footplate, an annular slot defined in the inner wall of the footplate and opposing the annular groove when the footplate is positioned on the circular projection of the modular end member; and a snap ring disposed in an aperture defined by the annular groove and the annular slot opposing each other, the snap ring detachably coupling the footplate to the end member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification