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An interbody spinal implant made of cortical bone or a bone composite adapted for placement across an intervertebral space formed across the height of a disc space between two adjacent vertebral bodies. The implant has a leading end that includes at least a portion of an arc of a circle from side to

An interbody spinal implant made of cortical bone or a bone composite adapted for placement across an intervertebral space formed across the height of a disc space between two adjacent vertebral bodies. The implant has a leading end that includes at least a portion of an arc of a circle from side to side, and sides that are at least in part straight or a trailing end having a radius of curvature of another circle from side to side.

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1. An interbody spinal implant made of cortical bone for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween,

1. An interbody spinal implant made of cortical bone for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, said implant comprising: a leading end for insertion first into the disc space and a trailing end opposite said leading end, said implant having a length from said leading end to said trailing end; opposed upper and lower portions between said leading and trailing ends adapted to be placed at least in part within and across the height of the disc space to contact and support the adjacent vertebral bodies, said upper and lower portions being non-arcuate along at least a portion of the length of said implant; and opposite sides between said upper portion and said lower portion, and between said leading and trailing ends, said opposite sides defining a width of said implant, at least one of said opposite sides being at least in part straight along at least a portion of the length of said implant, said leading end configured in the shape of approximately one half of a circle from one of said opposite sides to another of said opposite sides, the circle having a diameter generally equal to the width of said implant; said implant being manufactured from a bone ring obtained from a major long bone of a human having a medullary canal, said implant including at least a portion of the medullary canal passing through said upper and lower portions to form at least a portion of a passage adapted to hold bone growth promoting material for permitting for the growth of bone from vertebral body to vertebral body through said passage. 2. The implant of claim 1, wherein said implant has a maximum width between said opposite sides that is greater than one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted.3. The implant of claim 1, wherein said implant has a maximum width between said opposite sides that is less than one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted.4. The implant of claim 3, wherein said implant is adapted to be inserted side by side a second of said implant into the disc space between the adjacent vertebral bodies.5. The implant of claim 1, wherein at least a portion of said leading end has a reduced height to facilitate insertion of said implant between the two adjacent vertebral bodies.6. The implant of claim 1, wherein said trailing end is adapted to conform from side to side to at least a portion of the peripheral contour of at least one of the anterior and posterior aspects of the vertebral bodies adjacent a disc space into which said implant is inserted.7. The implant of claim 1, wherein said passage is between said opposite sides of said implant.8. The implant of claim 1, wherein said passage intersects at least one of said opposite sides.9. The implant of claim 1, wherein said passage is between said leading and trailing ends of said implant.10. The implant of claim 1, wherein said implant has a mid-longitudinal axis along the length, at least one of said opposite sides being at least in part oriented generally parallel to the mid-longitudinal axis of said implant.11. The implant of claim 1, wherein said opposite sides are at least in part generally parallel one another.12. The implant of claim 1, wherein at least a portion of said upper and lower surfaces are in an angular relationship to each other from trailing end to leading end for allowing angulation of the adjacent vertebral bodies relative to each other.13. The implant of claim 1, wherein said implant has a maximum length less than and approximating the posterior to anterior depth of the vertebral bodies.14. The implant of claim 1, further comprising a bone engaging surface formed on the exterior of at least said upper and lower portions for engaging the adjacent vertebral bodies, said bone engaging surface including at least one of a protrusion, a ratchet, a spike, a spline, surface roughenings, and knurling.15. The implant of claim 1, wherein said implant includes at least two members, each member having a leading portion, a trailing portion, a top, a bottom, and at least one side, each member being adapted to be placed side by side with another of said members, said leading portion of said members forming said leading end of said implant when placed side by side.16. The implant of claim 15, wherein said implant includes two of said members, each member being a mirror image of the other.17. The implant of claim 15, wherein each member includes at least a portion of said passage.18. The implant of claim 1, wherein said implant comprises at least in part of a bone growth promoting material.19. The implant of claim 18, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.20. The implant of claim 1, in combination with a bone growth promoting material.21. The implant of claim 20, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.22. The implant of claim 1, wherein said implant is treated with a bone growth promoting substance.23. The implant of claim 1, wherein said implant is at least in part resorbable.24. The implant of claim 1, in combination with a chemical substance adapted to inhibit scar formation.25. The implant of claim 1, in combination with an antimicrobial material.26. The implant of claim 1, wherein at least a portion of said implant is treated to promote bone ingrowth between said implant and said adjacent vertebral bodies.27. The implant of claim 1, further in combination with at least one spinal fixation implant.28. The implant of claim 1, wherein said trailing end is adapted to receive at least one bone screw adapted to engage at least one vertebral body when inserted through said implant.29. The implant of claim 28, further comprising a lock for locking at least one bone screw to said implant.30. The implant of claim 29, wherein said lock is made of one of cortical bone and a bioresorbable material.31. The implant of claim 28, wherein said screw is made of one of cortical bone and a bioresorbable material.32. An interbody spinal implant made of cortical bone for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, said implant comprising: a leading end for insertion first into the disc space and a trailing end opposite said leading end, said implant having a length from said leading end to said trailing end; opposed upper and lower portions between said leading and trailing ends adapted to be placed at least in part within and across the height of the disc space to contact and support the adjacent vertebral bodies; said implant having a maximum width that is greater than one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted, said leading end configured in the shape of approximately one half of a first circle along the width of said implant, said trailing end having a radius of curvature of a second circle along the width of said implant, the second circle having a radius greater than the radius of the first circle; and said implant being manufactured from a bone ring obtained from a major long bone of a human having a medullary canal, maid implant including at least a portion of the medullary canal passing throug h said upper and lower portions to form a passage adapted to hold bone growth promoting material for permitting for the growth of bone from vertebral body to vertebral body through said passage. 33. The implant of claim 32, wherein said leading end and said trailing end of said implant intersect at diametrically opposite points of the implant.34. The implant of claim 32, wherein said width of said implant is approximately equal to the diameter of the first circle.35. The implant of claim 32, wherein said implant has a height from said upper portion to said lower portion, the height of said implant being less than the maximum width of said implant.36. The implant of claim 32, wherein at least a portion of said leading end has a reduced height to facilitate insertion of said implant between the two adjacent vertebral bodies.37. The implant of claim 32, wherein said trailing end is adapted to conform from side to side to at least a portion of the peripheral contour of at least one of the anterior and posterior aspects of the vertebral bodies adjacent a disc space into which said implant is inserted.38. The implant of claim 32, wherein said implant has a perimeter, said passage being within said perimeter of said implant.39. The implant of claim 32, wherein said implant has a perimeter, said passage intersecting at least a portion of said perimeter.40. The implant of claim 32, wherein said passage is between said leading and trailing ends of said implant.41. The implant of claim 32, further comprising opposite sides between said leading end and said trailing end.42. The implant of claim 41, wherein at least one of said opposite sides is at least in part straight along at least a portion of the length of said implant.43. The implant of claim 41, wherein said implant has a mid-longitudinal axis along the length, at least one of said opposite sides being at least in part oriented generally parallel to the mid-longitudinal axis of said implant.44. The implant of claim 41, wherein said opposite sides are at least in part generally parallel one another.45. The implant of claim 32, wherein at least a portion of said upper and lower surfaces are in an angular relationship to each other from trailing end to leading end for allowing angulation of the adjacent vertebral bodies relative to each other.46. The implant of claim 32, wherein said implant has a maximum length less than and approximating the posterior to anterior depth of the vertebral bodies.47. The implant of claim 32, further comprising a bone engaging surface formed on the exterior of at least said upper and lower portions for engaging the adjacent vertebral bodies, said bone engaging surface including at least one of a protrusion, a ratchet, a spike, a spline, surface roughenings, and knurling.48. The implant of claim 32, wherein said implant includes at least two members, each member having a leading portion, a trailing portion, a top, a bottom, and at least one side, each member being adapted to be placed side by side with another of said members, said leading portion of said members forming said leading end of said implant when placed side by side.49. The implant of claim 48, wherein said implant includes two of said members, each member being a mirror image of the other.50. The implant of claim 48, wherein each member includes at least a portion of said passage.51. The implant of claim 32, wherein said implant comprises at least in part of a bone growth promoting material.52. The implant of claim 51, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.53. The implant of claim 32, in combination with a bone growth promoting material.54. The implant of claim 53, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.55. The implant of claim 32, wherein said implant is treated with a bone growth promoting substance.56. The implant of claim 32, wherein said implant is at least in part resorbable.57. The implant of claim 32, in combination with a chemical substance adapted to inhibit scar formation.58. The implant of claim 32, in combination with an antimicrobial material.59. The implant of claim 32, wherein at least a portion of said implant is treated to promote bone ingrowth between said implant and said adjacent vertebral bodies.60. The implant of claim 32, further in combination with at least one spinal fixation implant.61. The implant of claim 41, further comprising a curved transition between at least one of said opposite sides and said trailing end, said curved transition forming at least part of an arc of a circle.62. The implant of claim 32, wherein said trailing end is adapted to receive at least one bone screw adapted to engage at least one vertebral body when inserted through said implant.63. The implant of claim 62, further comprising a lock for locking at least one bone screw to said implant.64. The implant of claim 63, wherein said lock is made of one of cortical bone and a bioresorbable material.65. The implant of claim 62, wherein said screw is made of one of cortical bone and a bioresorbable material.66. An interbody spinal implant made of a bone composite material for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, said implant comprising: a leading end for insertion first into the disc space and a trailing end opposite said leading end, said implant having a length from said leading end to said trailing end; opposed upper and lower portions between said leading and trailing ends adapted to be placed at least in part within and across the height of the disc space to contact and support the adjacent vertebral bodies, said upper and lower portions being non-arcuate along at least a portion of the length of said implant; opposite sides between said upper portion and said lower portion, and between said leading and trailing ends, said opposite sides defining a width of said implant, at least one of said opposite sides being at least in part straight along at least a portion of the length of said implant, said leading end configured in the shape of approximately one half a circle from one of said opposite sides to another of said opposite sides, the circle having a diameter generally equal to the width of said implant; and said implant being manufactured from a bone composite material, said upper and lower portions of said implant including at least one opening in communication with one another to form at least a portion of a passage adapted to hold bone growth promoting malarial for permitting for the growth of bone from vertebral body to vertebral body through said passage. 67. The implant of claim 66, wherein said bone composite material includes at least one of cortical bone fibers, bone filaments, bone particles and bone dust.68. The implant of claim 66, further comprising a binding material.69. The implant of claim 59, wherein said binding material is at least one of bioactive and bioresorbable.70. The implant of claim 66, wherein said implant has a maximum width between said opposite sides that is greater than one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted.71. The implant of claim 66, wherein said implant has a maximum width between said opposite sides that is less than one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted.72. The implant of claim 71, wherein said implant is adapted to be inserted side by side a second of said implant into the disc space between the adjacent vertebral bodies.73. The implant of claim 66, wherein at least a portion of said leading end is has a reduced height to facilitate insertion of said implant between the two adjacent vertebral bodies.74. The implant of claim 66, wherein said trailing end is adapted to conform from side to side to at least a portion of the peripheral contour of at least one of the anterior and posterior aspects of the vertebral bodies adjacent a disc space into which said implant is inserted.75. The implant of claim 66, wherein said passage is between said opposite sides of said implant.76. The implant of claim 66, wherein said passage intersects at least one of said opposite sides of said implant.77. The implant of claim 66, wherein said passage is between said leading and trailing ends of said implant.78. The implant of claim 66, wherein said implant has a mid-longitudinal axis, at least one of said opposite sides being at least in part oriented generally parallel to the mid-longitudinal axis of said implant.79. The implant of claim 66, wherein said opposite sides are at least in part generally parallel one another.80. The implant of claim 66, wherein at least a portion of said upper and lower surfaces are in an angular relationship to each other from trailing end to leading end for allowing angulation of the adjacent vertebral bodies relative to each other.81. The implant of claim 66, wherein said implant has a maximum length less than and approximating the posterior to anterior depth of the vertebral bodies.82. The implant of claim 66, further comprising a bone engaging surface formed on the exterior of at least said upper and lower portions for engaging the adjacent vertebral bodies, said bone engaging surface including at least one of a protrusion, a ratchet, a spike, a spline, surface roughenings, and knurling.83. The implant of claim 66, wherein said implant includes at least two members, each member having a leading portion, a trailing portion, a top, a bottom, and at least one side, each member being adapted to be placed side by side with another of said members, said leading portion of said members forming said leading end of said implant when placed side by side.84. The implant of claim 83, wherein said implant includes two of said members, each member being a mirror image of the other.85. The implant of claim 83, wherein each member includes at least a portion of said passage.86. The implant of claim 66, wherein said implant comprises at least in part of a bone growth promoting material.87. The implant of claim 86, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.88. The implant of claim 66, in combination with a bone growth promoting material.89. The implant of claim 88, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.90. The implant of claim 66, wherein said implant is treated with a bone growth promoting substance.91. The implant of claim 66, wherein said implant is at least in part resorbable.92. The implant of claim 66, in combination with a chemical substance adapted to inhibit scar formation.93. The implant of claim 66, in combination with an antimicrobial material.94. The implant of claim 66, wherein at least a portion of said implant is treated to promote bone ingrowth between said implant and said adjacent vertebral bodies.95. The implant of claim 66, further in combination with at least one spinal fixationimplant.96. The implant of claim 66, wherein said trailing end is adapted to receive at least one bone screw a dapted to engage at least one vertebral body when inserted through said implant.97. The implant of claim 96, further comprising a lock for locking at least one bone screw to said implant.98. The implant of claim 97, wherein said lock is made of one of cortical bone and a bioresorbable material.99. The implant of claim 96, wherein said screw is made of one of cortical bone and a bioresorbable material.100. An interbody spinal implant made of a bone composite material for insertion at least in part into an implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, said implant comprising: a leading end for insertion first into the disc space and a trailing end opposite said leading end, said implant having a length from said leading end to said trailing end; opposed upper and lower portions between said leading and trailing ends adapted to be placed at least in part within and across the height of the disc space to contact and support the adjacent vertebral bodies; said implant having a maximum width that is greater than one-half of the width of the adjacent vertebral bodies into which said implant is adapted to be inserted, said leading end configured in the shape of approximately one half of a first circle along the width of said implant, said trailing end having a radius of curvature of a second circle along the width of said implant, the second circle having a radius greater than the radius of the first circle; and said implant being manufactured from a bone composite material, said upper and lower portions of said implant including at least one opening in communication with one another to form a passage adapted to hold bone growth promoting material for permitting for the growth of bone from vertebral body to vertebral body through said passage. 101. The implant of claim 100, wherein said bone composite material includes at least one of cortical bone fibers, bone filaments, bone particles and bone dust.102. The implant of claim 100, further comprising a binding material.103. The implant of claim 102, wherein said binding material is at least one of bioactive and bioresorbable.104. The implant of claim 100, wherein said leading end and said trailing end of said implant intersect at diametrically opposite points of the implant.105. The implant of claim 100, wherein said width of said implant is approximately equal to the diameter of the first circle.106. The implant of claim 100, wherein said implant has a height from said upper portion to said lower portion the height of said implant is less than the maximum width of said implant.107. The implant of claim 100, wherein at least a portion of said leading end has a reduced height to facilitate insertion of said implant between the two adjacent vertebral bodies.108. The implant of claim 100, wherein said trailing end is adapted to conform from side to side to at least a portion of the peripheral contour of at least one of the anterior and posterior aspects of the vertebral bodies adjacent a disc space into which said implant is inserted.109. The implant of claim 100, wherein implant has a perimeter and said passage is at least in part within said perimeter of said implant.110. The implant of claim 100, wherein said implant has a perimeter, said passage intersecting at least a portion of said perimeter of said implant.111. The implant of claim 100, wherein said passage is between said leading and trailing ends of said implant.112. The implant of claim 100, further comprising opposite sides between said leading end and said trailing end.113. The implant of claim 112, wherein at least one of said opposite sides is at least in part straight along at least a portion of the length of said implant.114. The implant of claim 112, wherein said implant has a mid-longitudinal axis along the length, at least one of said opposite side s being at least in part oriented generally parallel to the mid-longitudinal axis of said implant.115. The implant of claim 112, wherein said opposite sides are at least in part generally parallel one another.116. The implant of claim 100, wherein at least a portion of said upper and lower surfaces are in an angular relationship to each other from trailing end to leading end for allowing angulation of the adjacent vertebral bodies relative to each other.117. The implant of claim 100, wherein said implant has a maximum length less than and approximating the posterior to anterior depth of the vertebral bodies.118. The implant of claim 100, further comprising a bone engaging surface formed on the exterior of at least said upper and lower portions for engaging the adjacent vertebral bodies, said bone engaging surface including at least one of a protrusion, a ratchet, a spike, a spline, surface roughenings, and knurling.119. The implant of claim 100, wherein said implant includes at least two members, each member having a leading portion, a trailing portion, a top, a bottom, and at least one side, each member being adapted to be placed side by side with another of said members, said leading portion of said members forming said leading end of said implant when placed side by side.120. The implant of claim 119, wherein said implant includes two of said members, each member being a mirror image of the other.121. The implant of claim 119, wherein each member includes at least a portion of said passage.122. The implant of claim 100, wherein said implant comprises at least in part of a bone growth promoting material.123. The implant of claim 122, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.124. The implant of claim 100, in combination with a bone growth promoting material.125. The implant of claim 124, wherein said bone growth promoting material is selected from one of bone, bone derived products, demineralized bone matrix, mineralizing proteins, ossifying proteins, bone morphogenetic protein, hydroxyapatite, and genes coding for the production of bone.126. The implant of claim 100, wherein said implant is treated with a bone growth promoting substance.127. The implant of claim 100, wherein said implant is at least in part resorbable.128. The implant of claim 100, in combination with a chemical substance adapted to inhibit scar formation.129. The implant of claim 100, in combination with an antimicrobial material.130. The implant of claim 100, wherein at least a portion of said implant is treated to promote bone ingrowth between said implant and said adjacent vertebral bodies.131. The implant of claim 100, further in combination with at least one spinal fixation implant.132. The implant of claim 112, further comprising a curved transition between at least one of said opposite sides and said trailing end, said curved transition forming at least part of an arc of a circle.133. The implant of claim 100, wherein said trailing end is adapted to receive at least one bone screw adapted to engage at least one vertebral body when inserted through said implant.134. The implant of claim 133, further comprising a lock for locking at least one bone screw to said implant.135. The implant of claim 134, wherein said lock is made of one of cortical bone and a bioresorbable material.136. The implant of claim 133, wherein said screw is made of one of cortical bone and a bioresorbable material.