US20010049560A1
Expired / Lapsed
US
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Intervertebral allograft spacer
Assignee: Synthes USA LLC
•
Filing: 2001-04-09
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Granted: —
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Expires: 2021-04-09
Abstract
Abstract An allogenic intervertebral implant for fusing vertebrae is disclosed. The implant is a piece of allogenic bone conforming in size and shape with a portion of an end plate of a vertebra. The implant has a wedge-shaped profile to restore disc height and the natural curvature of the spine. The top and bottom surfaces of the implant have a plurality of teeth to resist expulsion and provide initial stability. The implant according to the present invention provides initial stability need for fusion without stress shielding.
Inventors
- 👤 David Paul
- 👤 Hansjuerg Emch
- 👤 Beat Schenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:08
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/3094; A61F2/30942; A61F2/44; A61F2/4455; A61F2/4465; A61F2/447; B; B29; B29C; B29C43/00; B29C43/006; A61F2/30721; A61F2/30724; A61F2/30744; A61F2/30965; A61F2/442; A61F2/46; A61F2/4603; A61F2/4611; A61F2/4644; A61F2002/2817; A61F2002/2835; A61F2002/2839; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30011; A61F2002/30057; A61F2002/3006; A61F2002/30062; A61F2002/30075; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30125; A61F2002/30126; A61F2002/30133; A61F2002/30138; A61F2002/30153; A61F2002/30158; A61F2002/30199; A61F2002/302; A61F2002/30224; A61F2002/30228; A61F2002/30233; A61F2002/30235; A61F2002/30237; A61F2002/3028; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30327; A61F2002/30329; A61F2002/30331; A61F2002/30354; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30383; A61F2002/30387; A61F2002/30433; A61F2002/30448; A61F2002/30459; A61F2002/30462; A61F2002/30476; A61F2002/30477; A61F2002/30481; A61F2002/30492; A61F2002/30494; A61F2002/30507; A61F2002/30515; A61F2002/30535; A61F2002/30593; A61F2002/30599; A61F2002/30604; A61F2002/30616; A61F2002/30617; A61F2002/30667; A61F2002/3071; A61F2002/30733; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30782; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/3082; A61F2002/30827; A61F2002/30828; A61F2002/30841; A61F2002/30843; A61F2002/30878; A61F2002/30891; A61F2002/30892; A61F2002/30894; A61F2002/30904; A61F2/30907; A61F2002/30909; A61F2002/30957; A61F2002/30971; A61F2002/30975; A61F2002/4635; A61F2002/4649; A61F2210/00; A61F2210/0004; A61F2210/0061; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2220/005; A61F2220/0066; A61F2220/0075; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008; A61F2230/0015; A61F2230/0017; A61F2230/0019; A61F2230/0026; A61F2230/0063; A61F2230/0065; A61F2230/0069; A61F2250/00; A61F2250/0014; A61F2250/0023; A61F2250/0036; A61F2250/0039; A61F2250/0058; A61F2250/006; A61F2250/0063; A61F2250/0085; A61F2250/0089; A61F2250/0096; A61F2250/0097; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00179; A61F2310/00293; A61F2310/00353; B29C33/00; B29C33/20; B29C33/26; B29L; B29L2031/00; B29L2031/30; B29L2031/3005; B29L2031/3041
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
92 words
1 . An intervertebral implant comprising a plug of allogenic bone conforming in size and shape with a portion of the end plates of adjacent vertebrae, wherein the top and bottom surfaces of the implant include a plurality of teeth provided in at least a two dimensional array with the teeth being spaced apart from one another for interlocking with the adjacent vertebrae, and wherein the teeth have a pyramidal shape profile defined by four sides forming an acute angle with respect to the respective top and bottom surfaces of the implant.
Claim 2
Dependent Claim
92 words
1 . An intervertebral implant comprising a plug of allogenic bone conforming in size and shape with a portion of the end plates of adjacent vertebrae, wherein the top and bottom surfaces of the implant include a plurality of teeth provided in at least a two dimensional array with the teeth being spaced apart from one another for interlocking with the adjacent vertebrae, and wherein the teeth have a pyramidal shape profile defined by four sides forming an acute angle with respect to the respective top and bottom surfaces of the implant.
Claim 3
Dependent Claim
25 words
2 . The implant of claim 1 wherein the implant has an interior space for receiving osteoconductive material to promote the formation of new bone.
Claim 4
Dependent Claim
14 words
3 . The implant of claim 2 wherein the osteoconductive material comprises bone chips.
Claim 5
Dependent Claim
35 words
4 . The implant of claim 1 wherein the angle formed from the tip of the teeth to a base where the sides meet with the respective top and bottom surfaces is approximately 60 degrees.
Claim 6
Dependent Claim
22 words
5 . The implant of claim 1 wherein the implant has a wedge-shaped profile to help restore disc height and spine curvature.
Claim 7
Dependent Claim
20 words
6 . The implant of claim 1 wherein the implant is formed of more than one piece of allogenic bone.
Claim 8
Dependent Claim
16 words
7 . The implant of claim 1 wherein the top and bottom surfaces are curved surfaces.
Claim 9
Dependent Claim
18 words
8 . The implant of claim 1 wherein the teeth are integral with the top and bottom surfaces.
Claim 10
Dependent Claim
31 words
9 . The implant of claim 1 wherein the teeth on the top and bottom surfaces are interrupted to form a channel to receive an insertion instrument for placing the implant.
Claim 11
Dependent Claim
50 words
10 . A method for restoring disc height between adjacent vertebrae having facing endplates, the method comprising: removing at least a portion of a disc located between the adjacent vertebrae; distracting an inner space between the facing endplates; and inserting the implant of claim 1 into the distracted inner space.
Claim 12
Dependent Claim
26 words
11 . The method of claim 10 further comprising measuring a distance between the adjacent vertebrae with a preoperative lateral radiograph to determine an implant height.
Claim 13
Dependent Claim
17 words
12 . The method of claim 10 wherein a distractor is used to distract the inner space.
Claim 14
Dependent Claim
19 words
13 . The method of claim 12 further comprising inserting a trial spacer implant to determine an implant height.
Claim 15
Dependent Claim
30 words
14 . The method of claim 10 wherein the implant further includes an interior space and the method further comprises placing osteoconductive material into the interior space of the implant.
Claim 16
Dependent Claim
91 words
15 . An implant for restoring disc height between adjacent vertebrae having facing endplates comprising an annular plug of allogenic bone surrounding an interior space, the plug having top and bottom surfaces configured and adapted in use to face the endplates of adjacent vertebrae, wherein the top and bottom surfaces include a plurality of teeth provided in at least a two dimensional array, and wherein the teeth have a pyramidal shape defined by four sides forming an acute angle with respect to the respective top and bottom surfaces of the implant.
Claim 17
Dependent Claim
91 words
15 . An implant for restoring disc height between adjacent vertebrae having facing endplates comprising an annular plug of allogenic bone surrounding an interior space, the plug having top and bottom surfaces configured and adapted in use to face the endplates of adjacent vertebrae, wherein the top and bottom surfaces include a plurality of teeth provided in at least a two dimensional array, and wherein the teeth have a pyramidal shape defined by four sides forming an acute angle with respect to the respective top and bottom surfaces of the implant.
Claim 18
Dependent Claim
35 words
16 . The implant of claim 15 wherein the angle formed from the tip of the teeth to a base where the sides meet with the respective top and bottom surfaces is approximately 60 degrees.
Claim 19
Dependent Claim
22 words
17 . The implant of claim 16 wherein the implant has a wedge-shaped profile to help restore disc height and spine curvature.
Claim 20
Dependent Claim
16 words
18 . The implant of claim 17 wherein the top and bottom surfaces are curved surfaces.
Claim 21
Dependent Claim
18 words
19 . The implant of claim 16 wherein the teeth are integral with the top and bottom surfaces.
Claim 22
Dependent Claim
20 words
20 . The implant of claim 15 wherein the implant is formed of more than one piece of allogenic bone.
References Cited (Backward Citations)
US4011602A
Cited
US4501269A
Cited
US4430760A
Cited
US4440750A
Cited
US4654464A
Cited
US4645503A
Cited
US4745914A
Cited
US4728570A
Cited
US4743259A
Cited
US4902296A
Cited
US4834757A
Cited
US5484437A
Cited
US5593409A
Cited
US5741253A
Cited
US5609635A
Cited
US5078746A
Cited
US5281226A
Cited
US4994084A
Cited
US5284655A
Cited
US5484601A
Cited
US5298254A
Cited
US5290558A
Cited
US5306308A
Cited
US5092892A
Cited
US5405390A
Cited
US5112354A
Cited
US5492697A
Cited
US5092891A
Cited
US5300077A
Cited
US5092893A
Cited
US5306302A
Cited
US5306304A
Cited
US5275954A
Cited
US5192327A
Cited
US5092887A
Cited
US5306303A
Cited
US5211664A
Cited
US5314476A
Cited
US5510396A
Cited
US5607474A
Cited
US6013853A
Cited
US5282861A
Cited
US5306309A
Cited
US5725579A
Cited
US5489307A
Cited
US5405391A
Cited
US5383932A
Cited
US5609637A
Cited
US5888224A
Cited
US5716415A
Cited
US5404269A
Cited
US5507813A
Cited
US5514180A
Cited
US5609636A
Cited
US5516532A
Cited
US5885299A
Cited
US6033405A
Cited
US5501706A
Cited
US5725813A
Cited
US5603716A
Cited
US5591235A
Cited
US5904716A
Cited
US5865849A
Cited
US6039762A
Cited
US5733288A
Cited
US5902338A
Cited
US6049025A
Cited
US5888222A
Cited
US5888227A
Cited
US5709683A
Cited
US5722977A
Cited
US5861043A
Cited
US5865845A
Cited
US5885292A
Cited
US5741261A
Cited
US6045554A
Cited
US5755793A
Cited
US5895426A
Cited
US6045580A
Cited
US6371988B1
Cited
US5856749A
Cited
US5728159A
Cited
US5897593A
Cited
US5879403A
Cited
US6045579A
Cited
US6033438A
Cited
US5904719A
Cited
US5876455A
Cited
US5865848A
Cited
US6511509B1
Cited
US5899941A
Cited
US6187329B1
Cited
US5899939A
Cited
US6030635A
Cited
US6554863B2
Cited
US6025538A
Cited
US6200347B1
Cited
US6206923B1
Cited
US6053916A
Cited
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