Modular anatomic fusion device
First Claim
1. A modular fusion cage, comprising:
- a ramp member adapted to be positioned between adjacent vertebral bodies, the ramp member having superior and inferior bone contacting surfaces, and anterior and posterior sides; and
a cage forming member slidably matable with the ramp member, the cage forming member having a central opening extending in a superior-inferior plane that is defined by an annular wall that is interrupted by a wall opening that communicates with the central opening, the ring-like wall further having superior and inferior bone contacting surfaces, and anterior and posterior sides.
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Accused Products
Abstract
A modular fusion cage and tool for the insertion of the fusion cage is provided. The fusion cage includes a ramp member having superior and inferior bone contacting surfaces, and anterior and posterior sides. The ramp member is adapted to be positioned between adjacent vertebral bodies. The implant also includes a ring member slidably matable with the ramp member. The ring member includes superior and inferior bone contacting surfaces, and anterior and posterior sides. The implant according to the present invention is particularly useful for facilitating the safe and accurate insertion of the implant between adjacent vertebral bodies.
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Citations
43 Claims
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1. A modular fusion cage, comprising:
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a ramp member adapted to be positioned between adjacent vertebral bodies, the ramp member having superior and inferior bone contacting surfaces, and anterior and posterior sides; and
a cage forming member slidably matable with the ramp member, the cage forming member having a central opening extending in a superior-inferior plane that is defined by an annular wall that is interrupted by a wall opening that communicates with the central opening, the ring-like wall further having superior and inferior bone contacting surfaces, and anterior and posterior sides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 40)
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23. A modular fusion cage, comprising:
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a substantially rectangular ramp member adapted to be positioned between adjacent vertebral bodies, the ramp member having opposed transverse sides, superior and inferior bone contacting surfaces, and anterior and posterior ends; and
a substantially annular ring-like member slidably matable with the ramp member, the ring-like member being formed of a structural wall that is interrupted by a wall opening, the ring-like member having superior and inferior bone contacting surfaces, anterior and posterior ends, and first and second rib members extending between the posterior and anterior ends and disposed inwardly of the structural wall;
a central opening, oriented in a superior-inferior plane, and disposed between the rib members; and
first and second transverse openings, oriented in a superior inferior plane, and disposed between one of the rib members and the structural wall.
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37. A modular fusion cage, comprising:
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a ramp member having posterior and anterior faces, superior and inferior bone contacting faces, and first and second transverse faces;
a ring member defined by an annular wall having posterior and anterior faces, superior and inferior bone contacting faces, and first and second transverse faces, the posterior face including an opening formed in the annular wall for receiving the ramp member.
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38. A spinal implant system, comprising:
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a modular fusion cage having a ramp member having posterior and anterior faces, superior and inferior bone contacting faces, and first and second transverse faces, and a ring member defined by an annular wall having posterior and anterior faces, superior and inferior bone contacting faces, and first and second transverse faces, the posterior face including an opening formed in the annular wall for receiving the ramp member, the anterior side of the superior and inferior faces further having at least one groove formed therein for receiving an insertion tool;
an insertion tool effective to grasp and manipulate the ring member relative to the ramp member, the insertion tool having first and second opposed grasping elements movable between an open position and a closed position and matable with the at least one groove formed in each of the superior and inferior faces of the ring member, and first and second opposed actuating members mated to the first and second grasping elements and effective to move the first and second grasping elements between the open and closed positions.
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39. A method of implanting a spinal disk prosthesis, comprising:
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providing a modular fusion cage having a ramp member adapted to be positioned between adjacent vertebral bodies, the ramp member having superior and inferior bone contacting surfaces and first and second transverse sides, and a cage forming member slidably matable with the ramp member, the cage forming member having a central opening adapted to receive the ramp member;
separating adjacent vertebrae, each vertebra having an endplate;
positioning the ramp member between the endplates of the adjacent vertebrae in an orientation in which the first and second transverse sides are in contact with the endplates;
rotating the ramp member to enable the superior and inferior surfaces to contact the endplates of the adjacent vertebrae; and
sliding the cage forming member around the ramp member.
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41. A method of implanting a spinal disk prosthesis, comprising:
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providing a modular fusion cage having a ramp member adapted to be positioned between adjacent vertebral bodies, and a ring member having a central opening adapted to slidably receive the ramp member;
separating adjacent vertebrae;
partially inserting the ramp member between the adjacent vertebrae;
impacting the ramp member with an impacting device to fully insert the ramp member between the adjacent vertebrae;
sliding the ring member around the ramp member. - View Dependent Claims (42)
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43. A method of implanting a spinal disk prosthesis, comprising:
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providing a modular fusion cage having a ring member and a ramp member, the ring member including an opening for receiving the ramp member;
inserting the ramp member between adjacent vertebrae;
providing an insertion tool effective to grasp and manipulate the ring member, the insertion tool having first and second opposed grasping elements movable between an open position and a closed position and matable with the ring member;
grasping the ring member with the first and second grasping elements of the insertion tool;
manipulating the insertion tool to position the ring member around the ramp member.
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Specification