Patent US7347873B2 successfully refreshed from Google Patents.
US7347873B2
Expired / Lapsed
US
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Intervertebral allograft spacer
Assignee: Synthes USA LLC
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Filing: 2005-06-09
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Granted: 2008-03-25
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Expires: 2025-06-09
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 C. Paul
- 👤 Hansjuerg Emch
- 👤 Beat Schenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:26
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/006; A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/3094; A61F2/30942; A61F2/44; A61F2/4455; A61F2/30721; A61F2/30724; A61F2/30744; A61F2/30965; A61F2/442; A61F2/4465; 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; A61F2002/30782; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/3082; 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; Y; Y10; Y10S; Y10S623/00; Y10S623/924; Y10S623/925
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
156 words
An intervertebral implant formed of at least one piece of allogenic bone, the implant comprising: top and bottom surfaces configured and adapted in use to face the end plates of adjacent vertebrae, the top and bottom surfaces having a topography to resist migration of the implant; a pair of lateral sides each lateral side having a length and extending between the top and bottom surfaces, the length of the lateral sides substantially equal; a front side having a length and extending between the top and bottom surfaces and the pair of lateral sides; a back side having a length and extending between the top and bottom surfaces and the pair of lateral sides; the length of the back side and the length of the front side between the pair of lateral sides being substantially equal, wherein the length of the lateral sides are at least approximately twice as long as the length of the front side.
Claim 2
Dependent Claim
156 words
An intervertebral implant formed of at least one piece of allogenic bone, the implant comprising: top and bottom surfaces configured and adapted in use to face the end plates of adjacent vertebrae, the top and bottom surfaces having a topography to resist migration of the implant; a pair of lateral sides each lateral side having a length and extending between the top and bottom surfaces, the length of the lateral sides substantially equal; a front side having a length and extending between the top and bottom surfaces and the pair of lateral sides; a back side having a length and extending between the top and bottom surfaces and the pair of lateral sides; the length of the back side and the length of the front side between the pair of lateral sides being substantially equal, wherein the length of the lateral sides are at least approximately twice as long as the length of the front side.
Claim 3
Dependent Claim
16 words
The implant of claim 1 , wherein the implant is provided with a hollow interior space.
Claim 4
Dependent Claim
16 words
The implant of claim 1 , wherein the interior space is adapted to receive osteo-conductive material.
Claim 5
Dependent Claim
22 words
The implant of claim 1 , wherein the surface topography on the top and bottom surfaces comprises teeth defined by four sides.
Claim 6
Dependent Claim
30 words
The implant of claim 4 , wherein the teeth have a pyramidal shape defined by four sides forming an acute angle with respect to the respective top and bottom surfaces.
Claim 7
Dependent Claim
18 words
The implant of claim 1 , wherein the implant is substantially symmetrical about a mid-plane of the implant.
Claim 8
Dependent Claim
27 words
The implant of claim 6 , wherein the implant has a wedge shaped profile such that the top surface is inclined with respect to the bottom surface.
Claim 9
Dependent Claim
27 words
The implant of claim 7 , wherein the angle of inclination between the top surface and the mid-plane is between about 4.2 degrees and about 15 degrees.
Claim 10
Dependent Claim
17 words
The implant of claim 8 , wherein the top and bottom surfaces are substantially flat, planar surfaces.
Claim 11
Dependent Claim
15 words
The implant of claim 8 , wherein the top and bottom surfaces are curved surfaces.
Claim 12
Dependent Claim
23 words
The implant of claim 1 , wherein the implant has a gradual decrease in height from the front side to the back side.
Claim 13
Dependent Claim
23 words
The implant of claim 1 , wherein the front side of the implant transitions to the top and bottom surfaces with rounded edges.
Claim 14
Dependent Claim
20 words
The implant of claim 1 , wherein the pair of lateral sides are substantially straight and substantially flat, planar surfaces.
Claim 15
Dependent Claim
15 words
The implant of claim 13 , wherein the front and back sides are substantially parallel.
Claim 16
Dependent Claim
13 words
The implant of claim 1 , wherein the lateral sides are substantially parallel.
Claim 17
Dependent Claim
20 words
The implant of claim 1 , further comprising at least one channel adapted and configured to receive a surgical instrument.
Claim 18
Dependent Claim
24 words
The implant of claim 16 , wherein the at least one channel extends along at least a portion of one of the lateral sides.
Claim 19
Dependent Claim
19 words
The implant of claim 16 , wherein the at least one channel is substantially smooth and substantially without teeth.
Claim 20
Dependent Claim
35 words
The implant of claim 1 , further comprising a pair of parallel channels extending along the lateral sides, the channels adapted and configured to receive portions of the same surgical instrument at the same time.
Claim 21
Dependent Claim
34 words
The implant of claim 1 , farther comprising at least two parallel channels formed in the two lateral sides, the channels starting at the back side and extending only partially along the lateral sides.
Claim 22
Dependent Claim
16 words
The implant of claim 1 , wherein the implant is formed of one piece of bone.
Claim 23
Dependent Claim
21 words
The implant of claim 1 , further comprising a threaded hole in the back side adapted to receive a surgical instrument.
Claim 24
Dependent Claim
18 words
The implant of claim 1 , wherein the surface topography covers substantially the entire top and bottom surfaces.
Claim 25
Dependent Claim
17 words
The implant of claim 1 , wherein the top and bottom surfaces are substantially flat, planar surfaces.
Claim 26
Dependent Claim
20 words
The implant of claim 24 , wherein the topography to resist migration of the implant is a plurality of teeth.
Claim 27
Dependent Claim
35 words
The implant of claim 25 , wherein the plurality of teeth are defined by four sides, at least three of the sides forming an acute angle with respect to the respective top and bottom surfaces.
Claim 28
Dependent Claim
24 words
The implant of claim 26 , wherein the teeth formed on the top and bottom surfaces are provided in a plurality of adjacent rows.
Claim 29
Dependent Claim
18 words
The implant of claim 1 , wherein the top and bottom surfaces have a single radius of curvature.
Claim 30
Dependent Claim
145 words
An intervertebral implant formed of at least one piece of allogenic bone, the implant comprising: a mid-plane about which the implant is substantially symmetrical; top and bottom surfaces configured and adapted in use to face the end plates of adjacent vertebrae, the top and bottom surfaces each being inclined in a range between about 4.2 degrees and about 15 degrees with respect to the mid-plane; at least two substantially smooth parallel channels adapted and configured to receive a surgical instrument; and at least one rounded edge between the top and bottom surfaces to facilitate insertion of the implant; wherein the top and bottom surfaces comprise a plurality of teeth provided in a plurality of adjacent rows, and further wherein the teeth are defined by four sides, at least three of the sides forming an acute angle with respect to the respective top and bottom surfaces.
Claim 31
Dependent Claim
145 words
An intervertebral implant formed of at least one piece of allogenic bone, the implant comprising: a mid-plane about which the implant is substantially symmetrical; top and bottom surfaces configured and adapted in use to face the end plates of adjacent vertebrae, the top and bottom surfaces each being inclined in a range between about 4.2 degrees and about 15 degrees with respect to the mid-plane; at least two substantially smooth parallel channels adapted and configured to receive a surgical instrument; and at least one rounded edge between the top and bottom surfaces to facilitate insertion of the implant; wherein the top and bottom surfaces comprise a plurality of teeth provided in a plurality of adjacent rows, and further wherein the teeth are defined by four sides, at least three of the sides forming an acute angle with respect to the respective top and bottom surfaces.
Claim 32
Dependent Claim
17 words
The implant of claim 29 , wherein the top and bottom surfaces are substantially flat planar surfaces.
Claim 33
Dependent Claim
25 words
The implant of claim 29 , wherein the top and bottom surfaces are substantially flat in a first direction and curved in a second direction.
Claim 34
Dependent Claim
39 words
The implant of claim 29 , formed of more than one piece of allogenic bone arranged side by side and adapted and configured such that the top and bottom surfaces are formed of more than one piece of bone.
Claim 35
Dependent Claim
100 words
The implant of claim 29 , wherein the implant comprises a pair of lateral sides having a length and extending between the top and bottom surfaces, the lateral sides being substantially straight and parallel and containing the parallel channels; a front side having a length and extending between the top and bottom surfaces and the pair of lateral sides; and a back side having a length and extending between top and bottom surfaces and the pair of lateral sides, wherein the length of the lateral sides are at least approximately twice as long as the length of the back side.
Claim 36
Dependent Claim
240 words
An intervertebral implant formed of allogenic bone, the implant comprising: top and bottom surfaces configured and adapted in use to face the end plates of adjacent vertebrae, the top and bottom surfaces having a plurality of teeth wherein the teeth are defined by four sides, at least three of the sides forming an acute angle with respect to the respective top and bottom surfaces; a pair of lateral sides extending between the top and bottom surfaces, at least one substantially smooth channel extending at least partially along the length of each lateral side, the at least one substantially smooth channel formed on one of the lateral sides being substantially parallel to the at least one substantially smooth channel formed on the other lateral side; a front side extending between the top and bottom surfaces and the pair of lateral sides; the front side transitioning at the top and bottom surfaces to form a rounded edge between the front side and each of the top and bottom surfaces; a back side opposite the front side and extending between the top and bottom surfaces and the pair of lateral sides, the length of each lateral side being substantially equal to each other and greater than the length of the front side or back side; and at least one substantially smooth parallel channel extending at least partially along the length of each lateral side; wherein the front and back surfaces are curved surfaces.
Claim 37
Dependent Claim
240 words
An intervertebral implant formed of allogenic bone, the implant comprising: top and bottom surfaces configured and adapted in use to face the end plates of adjacent vertebrae, the top and bottom surfaces having a plurality of teeth wherein the teeth are defined by four sides, at least three of the sides forming an acute angle with respect to the respective top and bottom surfaces; a pair of lateral sides extending between the top and bottom surfaces, at least one substantially smooth channel extending at least partially along the length of each lateral side, the at least one substantially smooth channel formed on one of the lateral sides being substantially parallel to the at least one substantially smooth channel formed on the other lateral side; a front side extending between the top and bottom surfaces and the pair of lateral sides; the front side transitioning at the top and bottom surfaces to form a rounded edge between the front side and each of the top and bottom surfaces; a back side opposite the front side and extending between the top and bottom surfaces and the pair of lateral sides, the length of each lateral side being substantially equal to each other and greater than the length of the front side or back side; and at least one substantially smooth parallel channel extending at least partially along the length of each lateral side; wherein the front and back surfaces are curved surfaces.
Claim 38
Dependent Claim
170 words
An intervertebral implant formed from bone, the implant being sized and configured for insertion between adjacent vertebral bodies, the implant comprising: an anterior surface, a posterior surface, a pair of lateral side surfaces, a top surface and a bottom surface, wherein the top surfaces is sized and configured for contacting at least a portion of an endplate formed on one of the adjacent vertebral bodies, the bottom surface is sized and configured for contacting at least a portion of an endplate formed on the other one of the adjacent vertebral bodies, the pair of lateral side surfaces have a length extending from the anterior surface to the posterior surface, the anterior surface has a length extending from one of the lateral side surfaces to the other of the lateral side surfaces, the length of the lateral side surfaces being at least approximately twice as long as the length of the anterior surface; and wherein the top and bottom surfaces includes a plurality of teeth for resisting migration of the implant.
Claim 39
Dependent Claim
170 words
An intervertebral implant formed from bone, the implant being sized and configured for insertion between adjacent vertebral bodies, the implant comprising: an anterior surface, a posterior surface, a pair of lateral side surfaces, a top surface and a bottom surface, wherein the top surfaces is sized and configured for contacting at least a portion of an endplate formed on one of the adjacent vertebral bodies, the bottom surface is sized and configured for contacting at least a portion of an endplate formed on the other one of the adjacent vertebral bodies, the pair of lateral side surfaces have a length extending from the anterior surface to the posterior surface, the anterior surface has a length extending from one of the lateral side surfaces to the other of the lateral side surfaces, the length of the lateral side surfaces being at least approximately twice as long as the length of the anterior surface; and wherein the top and bottom surfaces includes a plurality of teeth for resisting migration of the implant.
Claim 40
Dependent Claim
46 words
The implant of claim 35 , wherein the posterior face has a length extending from one of the lateral side surfaces to the other of the lateral sides surfaces, the length of the posterior surface being substantially the same as the length of the anterior surface.
Claim 41
Dependent Claim
32 words
The implant of claim 35 , wherein the plurality of teeth have a pyramidal shape defined by four sides forming an acute angle with respect to the respective top and bottom surfaces.
Claim 42
Dependent Claim
33 words
The implant of claim 35 , wherein the teeth are defined by four sides, at least three of the sides forming an acute angle with respect to the respective top and bottom surfaces.
Claim 43
Dependent Claim
20 words
The implant of claim 35 , further comprising at least one channel adapted and configured to receive a surgical instrument.
Claim 44
Dependent Claim
25 words
The implant of claim 39 , wherein the at least one channel extends along at least a portion of one of the lateral side surfaces.
Claim 45
Dependent Claim
37 words
The implant of claim 35 , further comprising a pair of substantially parallel channels extending along the lateral side surfaces, the channels being sized and configured to receive a surgical instrument for facilitating insertion of the implant.
Claim 46
Dependent Claim
36 words
The implant of claim 35 , further comprising at least two parallel channels formed in the lateral side surfaces, the channels starting at the posterior surface and extending at least partially along the lateral side surfaces.
Claim 47
Dependent Claim
20 words
The implant of claim 35 , further comprising a threaded hole in the posterior surface for receiving a surgical instrument.
Claim 48
Dependent Claim
16 words
The implant of claim 35 , wherein the implant is formed of one piece of bone.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2011-03-25 | 2011-09-24 | 2012-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-03-25 | 2015-09-24 | 2016-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-03-25 | 2019-09-24 | 2020-03-25 | $7700.00 | Window Closed / Lapsed |