Allograft implant
First Claim
1. An multipiece implant having superior and inferior surfaces comprising:
- at least first and second cortical bone segments, each segment having a locking surface configured to engage the locking surface of the other segment, each segment further having a pair of vertebra-engaging surfaces and at least one fastener-engaging surface;
at least one fastener;
wherein the locking surfaces of the first and second bone segments comprise corresponding male and female surfaces, the fastener further configured to contact the fastener-engaging surfaces of the first and second bone segments to lock the segments together to form a multipiece implant having mechanical properties substantially similar to those of an implant formed of a single piece of cortical bone.
2 Assignments
0 Petitions
Accused Products
Abstract
An allogenic implant for use in intervertebral fusion is formed from one or more two pieces. The pieces are made from bone, and are joined together to form an implant having sufficient strength and stability to maintain a desired distance between first and second vertebrae in a spinal fusion procedure. The implant pieces may be formed of cortical bone and connected by dovetail joints, and at least one cortical bone pin may be provided to lock the pieces together and to add strength to the implant. Teeth are formed on the vertebra engaging surfaces of the implant prevent short-term slippage of the implant.
327 Citations
50 Claims
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1. An multipiece implant having superior and inferior surfaces comprising:
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at least first and second cortical bone segments, each segment having a locking surface configured to engage the locking surface of the other segment, each segment further having a pair of vertebra-engaging surfaces and at least one fastener-engaging surface;
at least one fastener;
wherein the locking surfaces of the first and second bone segments comprise corresponding male and female surfaces, the fastener further configured to contact the fastener-engaging surfaces of the first and second bone segments to lock the segments together to form a multipiece implant having mechanical properties substantially similar to those of an implant formed of a single piece of cortical bone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 49, 50)
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20. A method of manufacturing an intervertebral implant having a superior surface, an inferior surface, and a perimeter, comprising the steps of:
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forming at least first, second and third implant pieces from cortical bone;
connecting the first and second pieces using a joint having a male element disposed on one of the first and second pieces and a corresponding female element disposed on the other of the first and second pieces;
connecting the second and third pieces using a joint having a male element disposed on one of the second and third pieces and a corresponding female element disposed on the other of the second and third pieces;
locking the first, second and third pieces together using a cortical bone pin disposed within bores formed through at least a portion of each piece to form an implant configured to be inserted between adjacent vertebra of a patient'"'"'s spinal column; and
forming superior and inferior vertebra engaging surfaces on the implant, wherein the engaging surfaces each comprise a plurality of teeth. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An intervertebral implant kit, comprising:
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at least one implant configured for insertion between the end plates of adjacent vertebrae in the spinal column of a patient, the implant comprising at least first and second cortical bone segments, the implant further having first and second vertebra engaging surfaces and a perimeter, at least one implant insertion tool for engaging the implant and inserting the implant between the adjacent vertebrae, the tool having at least one implant engaging end configured to grip the implant, wherein the perimeter of the implant has an anterior segment configured to substantially conform to the anterior shape of the adjacent vertebral end plates when the implant is installed between the adjacent vertebrae, and the implant engaging end of the tool is further configured to engage the implant along a substantial portion of the anterior segment. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification