Patent US6726720B2 successfully refreshed from Google Patents.
US6726720B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular disc prosthesis
Assignee: DePuy Spine LLC
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Filing: 2002-03-27
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Granted: 2004-04-27
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Expires: 2022-03-27
Abstract
Abstract A modular implant that is effective to replace a damaged or degenerated spinal disc is provided. The implant includes a central core member having superior and inferior surfaces, a superior endplate member having a bone-contacting surface and a mating surface effective to mate with the superior surface of the central core member, and an inferior endplate member having a bone-contacting surface and a mating surface effective to mate with the inferior surface of the central core member. The modularity of the implant allows the surgeon to select and properly fit each modular endplate member separately during the surgical procedure, thereby eliminating the need to prepare the endplates of each adjacent vertebrae, and/or the bone-contacting surfaces of the implant.
Inventors
- 👤 Raymond Ross
- 👤 Michael O'Neil
- 👤 Mark Boomer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4455; A61F2/4465; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30383; A61F2002/30387; A61F2002/30433; A61F2002/30448; A61F2002/30451; A61F2002/30476; A61F2002/30492; A61F2002/30535; A61F2002/30604; A61F2002/30616; A61F2/30767; A61F2/30771; A61F2002/30841; A61F2002/30845; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2220/005; A61F2220/0058; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
99 words
A modular implant, comprising: a central core member having superior and inferior surfaces with superior and inferior attachments members; a superior endplate member having a bone-contacting surface and a mating surface with a first complementary connecting element slidably matable with a second complementary connecting element on the superior attachment member on the superior surface of the central core member; an inferior endplate member having a bone-contacting surface and a mating surface with a first complementary connecting element slidably matable with a second complementary connecting element on the inferior attachment member on the inferior surface of the central core member.
Claim 2
Dependent Claim
99 words
A modular implant, comprising: a central core member having superior and inferior surfaces with superior and inferior attachments members; a superior endplate member having a bone-contacting surface and a mating surface with a first complementary connecting element slidably matable with a second complementary connecting element on the superior attachment member on the superior surface of the central core member; an inferior endplate member having a bone-contacting surface and a mating surface with a first complementary connecting element slidably matable with a second complementary connecting element on the inferior attachment member on the inferior surface of the central core member.
Claim 3
Dependent Claim
19 words
The modular implant of claim 1 , wherein the attachment members are adhesively mated to the central core member.
Claim 4
Dependent Claim
45 words
The modular implant of claim 1 , wherein the complementary connecting elements comprise a female dovetail formed on one of the attachment members and the endplate members, and a complementary male dovetail formed on the other one of the attachment members and the endplate members.
Claim 5
Dependent Claim
45 words
The modular implant of claim 3 , further comprising a bore extending through the complementary male and female dovetail components, and a pin slidably disposed through the bore, the pin being effective to prevent movement of the attachment members with respect to the endplate members.
Claim 6
Dependent Claim
56 words
The modular implant of claim 1 , wherein the complementary connecting elements comprise at least one protruding element formed on one of the attachment members and the endplate members, and at least one bore formed on the other one of the attachment members and the endplate members, the bore being adapted to receive the protruding element.
Claim 7
Dependent Claim
32 words
The modular implant of claim 1 , wherein the bone-contacting surfaces of the superior and inferior endplate members each have a shape adapted to conform to the endplates of adjacent vertebral bodies.
Claim 8
Dependent Claim
47 words
The modular implant of claim 6 , wherein the shape of the bone-contacting surfaces of the superior and inferior endplate members is selected from the group consisting of a convex shape, a domed shape, a serpentine shape, a ramped shape, and an angled shape, and combinations thereof.
Claim 9
Dependent Claim
52 words
The modular implant of claim 1 , further comprising a locking mechanism formed on at least one of the attachment members and the endplate members, the locking mechanism being effective to fixedly engage the superior attachment member to the superior endplate member and the inferior attachment member to the inferior endplate member.
Claim 10
Dependent Claim
34 words
The modular implant of claim 8 , wherein the locking mechanism comprises a bore extending through the attachment member and the endplate member, and a pin member adapted to be disposed through the bore.
Claim 11
Dependent Claim
41 words
The modular implant of claim 1 , wherein the implant includes a posterior portion and an anterior portion, and the superior and inferior endplate members are slidably matable with the superior and inferior attachment members in the posterior and anterior directions.
Claim 12
Dependent Claim
39 words
The modular implant of claim 1 , wherein the implant includes a posterior portion and an anterior portion, and the superior and inferior endplate members are slidably matable with the superior and inferior attachment members in a posterio-lateral direction.
Claim 13
Dependent Claim
39 words
The modular implant of claim 1 , wherein the implant includes a posterior portion and an anterior portion, and the superior and inferior endplate members are slidably matable with the superior and inferior attachment members in an anterio-lateral direction.
Claim 14
Dependent Claim
18 words
The modular implant of claim 1 , wherein the central core member is made from a polymeric material.
Claim 15
Dependent Claim
173 words
A modular implant, comprising: a disc member having a central core member having superior and inferior surfaces; a superior attachment plate disposed on the superior surface of the central core member; and an inferior attachment plate disposed on the inferior surface of the central core member; a superior endplate member having a bone-contacting surface and an engagement surface effective to slidably mate with the superior attachment plate of the disc member; and a first locking mechanism disposed between the superior endplate member and the superior attachment plate and effective to lock the endplate member to the disc member when the superior endplate member is mated to the superior attachment plate; an inferior endplate member having a bone-contacting surface and an engagement surface effective to slidably mate with the inferior attachment plate of the disc member; a second locking mechanism disposed between the inferior endplate member and the inferior attachment plate and effective to lock the endplate member to the disc member when the inferior endplate member is mated to the inferior attachment plate.
Claim 16
Dependent Claim
173 words
A modular implant, comprising: a disc member having a central core member having superior and inferior surfaces; a superior attachment plate disposed on the superior surface of the central core member; and an inferior attachment plate disposed on the inferior surface of the central core member; a superior endplate member having a bone-contacting surface and an engagement surface effective to slidably mate with the superior attachment plate of the disc member; and a first locking mechanism disposed between the superior endplate member and the superior attachment plate and effective to lock the endplate member to the disc member when the superior endplate member is mated to the superior attachment plate; an inferior endplate member having a bone-contacting surface and an engagement surface effective to slidably mate with the inferior attachment plate of the disc member; a second locking mechanism disposed between the inferior endplate member and the inferior attachment plate and effective to lock the endplate member to the disc member when the inferior endplate member is mated to the inferior attachment plate.
Claim 17
Dependent Claim
42 words
The modular implant of claim 14 , wherein the disc member includes a posterior portion and an anterior portion, and the superior and inferior endplate members are slidably matable with the superior and inferior attachment plates in the posterior and anterior directions.
Claim 18
Dependent Claim
32 words
The modular implant of claim 14 , wherein the locking mechanism comprises a complementary male and female dovetail members adapted to provide frictional engagement of the endplate members to the disc member.
Claim 19
Dependent Claim
31 words
The modular implant of claim 14 , wherein at least a portion of the bone-contacting surface of at least one of the endplate members include a plurality of bone-engaging surface features.
Claim 20
Dependent Claim
47 words
The modular implant of claim 9 , wherein the bone-contacting surfaces of the superior and inferior endplate members each have a shape selected from the group consisting of a convex shape, a domed shape, a serpentine shape, a ramped shape, and an angled shape, and combinations thereof.
Claim 21
Dependent Claim
17 words
The modular implant of claim 14 , wherein the disc member is made from a polymeric material.
Claim 22
Dependent Claim
117 words
A modular implant system, comprising: a central core member having a superior engagement plate fixedly disposed on a superior surface of the central core member, and an inferior engagement plate fixedly disposed on an inferior engagement surface; a plurality of superior endplate members removably matable with the superior engagement plate on the superior surface of the central core member; and a plurality of inferior endplate members removably matable with the inferior engagement plate on the inferior surface of the central core member; wherein the superior and inferior engagement plates each include one of a female and male dovetail, and the plurality of superior and inferior endplate members each include the other of a female and male dovetail.
Claim 23
Dependent Claim
117 words
A modular implant system, comprising: a central core member having a superior engagement plate fixedly disposed on a superior surface of the central core member, and an inferior engagement plate fixedly disposed on an inferior engagement surface; a plurality of superior endplate members removably matable with the superior engagement plate on the superior surface of the central core member; and a plurality of inferior endplate members removably matable with the inferior engagement plate on the inferior surface of the central core member; wherein the superior and inferior engagement plates each include one of a female and male dovetail, and the plurality of superior and inferior endplate members each include the other of a female and male dovetail.
Claim 24
Dependent Claim
23 words
The modular implant system of claim 20 , wherein the superior and inferior endplate members are slidably matable with the central core member.
Claim 25
Dependent Claim
44 words
The modular implant system of claim 21 , wherein the central core member includes a posterior side, an anterior side, and first and second lateral sides, the male and female dovetails of the engagement plates and the endplate members extending in an anterio-lateral direction.
Claim 26
Dependent Claim
44 words
The modular implant system of claim 21 , wherein the central core member includes a posterior side, an anterior side, and first and second lateral sides, the male and female dovetails of the engagement plates and the endplate members extending in a posterio-lateral direction.
Claim 27
Dependent Claim
51 words
The modular implant system of claim 20 , wherein the superior and inferior endplate members each have an engagement surface matable with the superior and inferior engagement plates and a bone contacting surface, each bone contacting sruface of each endplate member having a shape adapted to mate with a vertebral endplate.
Claim 28
Dependent Claim
43 words
The modular implant system of claim 24 , wherein the shape of the bone contacting surface of each endplate member is selected from the group consisting of a convex shape, a concave shape, a domed shape, an angled shape, and a serpentine shape.
Claim 29
Dependent Claim
32 words
The modular implant system of claim 20 , wherein the central core member is made from a polymeric material and is compression molded to mate to the superior and inferior engagement plates.
Claim 30
Dependent Claim
29 words
The modular implant system of claim 20 , wherein the male and female dovetails are adapted to provide a locking frictional engagement between the engagement plates and the endplates.
Claim 31
Dependent Claim
44 words
The modular implant system of claim 20 , wherein the central core member includes a posterior side, an anterior side, and first and second lateral sides, the male and female dovetails of the engagement plates and the endplate members extending in an posterior-anterior direction.
Claim 32
Dependent Claim
108 words
A modular implant, comprising: a central core member having a superior attachment plate disposed on a superior surface of the central core member, and an inferior attachment plate disposed on an inferior surface of the central core member, the central core member being made from a polymeric material and being compression molded to the superior and inferior attachment plates; a superior endplate member having a bone-contacting surface and an engagement surface effective to mate with the superior attachment plate of the disc member; and an inferior endplate member having a bone-contacting surface and an engagement surface effective to mate with the inferior attachment plate of the disc member.
Claim 33
Dependent Claim
108 words
A modular implant, comprising: a central core member having a superior attachment plate disposed on a superior surface of the central core member, and an inferior attachment plate disposed on an inferior surface of the central core member, the central core member being made from a polymeric material and being compression molded to the superior and inferior attachment plates; a superior endplate member having a bone-contacting surface and an engagement surface effective to mate with the superior attachment plate of the disc member; and an inferior endplate member having a bone-contacting surface and an engagement surface effective to mate with the inferior attachment plate of the disc member.
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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) | 2007-04-27 | 2007-10-27 | 2008-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-27 | 2011-10-27 | 2012-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-27 | 2015-10-27 | 2016-04-27 | $7700.00 | Window Closed / Lapsed |