Spinal intervertebral implant insertion tool
First Claim
1. A spinal implant insertion tool for inserting the implant into the disc space between two adjacent vertebra, the disc space having a given orientation relative to the spine, the implant having opposing first and second end surfaces and first and second opposing sides extending generally in a longitudinal direction between and toward the end surfaces, at least a third side having a flat surface located between the end surfaces, and a threaded bore in the first end surface, the tool comprising:
- an elongated shank having a central longitudinal axis, the shank having an implant receiving surface at one end transverse to the axis for abutting the implant first end surface;
an extension member extending from the one end in the axial direction and offset from the axis arranged to abut the third side surface of the implant, the extension member being arranged relative to the implant to preclude rotation of the implant relative to the shank about the axis;
a threaded member extending axially from the implant receiving surface for engagement with the threaded bore; and
a guide member secured to the shank having a predetermined orientation relative to the extension member for providing visual alignment of the extension member relative to the disc space orientation during insertion of the implant.
2 Assignments
0 Petitions
Accused Products
Abstract
An insertion tool for a C-shaped bone spinal wedge shaped intervertebral implant comprises an outer shank with a hollow core in which is placed a shaft with a threaded stud which passes through a bore in the shank at an implant insertion end of the shank. A flat extension member defines a plane and extends from the shank overlying the stud, the stud for receiving a threaded bore of the spinal implant. The shaft has a knob distal the stud for rotatably attaching the stud to the implant. The extension member abuts the implant at mating flat surfaces which are spaced by a medial recess formed by a portion of the medullary canal of a long bone. A cap slides over the shank at an end opposite the extension member to capture the shaft in the shank core. A guide rod is attached to a collar on the shank normal to the plane of the extension member to assist the surgeon in orienting the implant to the disc space orientation during insertion of the implant. The extension member prevents rotation of the implant and in some implementations may absorb insertion stresses to minimize damage to the implant during insertion.
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Citations
17 Claims
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1. A spinal implant insertion tool for inserting the implant into the disc space between two adjacent vertebra, the disc space having a given orientation relative to the spine, the implant having opposing first and second end surfaces and first and second opposing sides extending generally in a longitudinal direction between and toward the end surfaces, at least a third side having a flat surface located between the end surfaces, and a threaded bore in the first end surface, the tool comprising:
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an elongated shank having a central longitudinal axis, the shank having an implant receiving surface at one end transverse to the axis for abutting the implant first end surface;
an extension member extending from the one end in the axial direction and offset from the axis arranged to abut the third side surface of the implant, the extension member being arranged relative to the implant to preclude rotation of the implant relative to the shank about the axis;
a threaded member extending axially from the implant receiving surface for engagement with the threaded bore; and
a guide member secured to the shank having a predetermined orientation relative to the extension member for providing visual alignment of the extension member relative to the disc space orientation during insertion of the implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A spinal implant insertion tool comprising:
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a tubular shank having a longitudinal axis and a hollow core terminating at one end in an end surface with a bore therethrough along said axis;
a collar extending about the shank adjacent to one shank end;
a guide member extending normal to the shank and attached to the collar;
a shaft rotatably mounted in the core with a threaded member at one end and extending through the bore;
a flat elongated extension member defining a plane fixedly secured to and extending from the shank one end offset from the axis, the plane being at a predetermined orientation relative to the guide member; and
a cap attached to the shank at an end distal said extension member for releaseably enclosing said core and received shaft. - View Dependent Claims (14)
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15. A spinal implant insertion tool for inserting the implant into the disc space between two adjacent vertebra, the disc space having a given orientation relative to the spine, the implant having opposing first and second end surfaces and first and second opposing sides extending generally in a longitudinal direction between and toward the end surfaces, third and fourth coplanar flat sides spaced by an intervening chamber in communication with the first, second, third and fourth sides and located between the third and fourth sides, the third side located adjacent to the first end and the fourth side located adjacent to the second end, and a threaded bore in the first end surface, the tool comprising:
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an elongated shank having a central longitudinal axis, the shank having an implant receiving surface at one end transverse to the axis for abutting the implant first end surface;
an extension member extending from the one end in the axial direction and offset from the axis arranged to abut the third and fourth sides surfaces and over lie the chamber; and
a threaded member extending axially from the implant receiving surface for engagement with the threaded bore, the extension member being arranged relative to the implant to preclude rotation of the implant relative to the shank about the axis. - View Dependent Claims (16, 17)
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Specification