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Artificial disc replacements with natural kinematics
Assignee: Howmedica Osteonics Corp
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Filing: 2003-04-22
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Granted: 2004-03-16
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Expires: 2023-04-22
Abstract
Abstract This invention improves upon prior art total disc replacements (TDRS) by more closely replicating the kinematics of a natural disc. The preferred embodiments feature two or more fixed centers of rotation (CORs) and an optional variable COR (VCOR) as the artificial disc replacements (ADRs) translates from a fixed posterior COR to a more anterior COR. The multiple CORs permit a TDR with a posterior COR that lies posterior to the COR of the TDR to facilitate normal disc motion. The use of two or more CORs allow more flexion and more extension than permitted by the facet joints and the annulus fibrosis. Artificial facet joint-like components may also be incorporated into the design to restrict excessive translation, rotation, and/or lateral bending.
Inventors
- 👤 Bret A. Ferree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/44; A61F2/442; A61F2/4425; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/30767; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30016; A61F2002/3006; A61F2002/3008; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30136; A61F2002/30199; A61F2002/302; A61F2002/30242; A61F2002/30245; A61F2002/30301; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30327; A61F2002/30329; A61F2002/30476; A61F2002/30507; A61F2002/30518; A61F2002/30535; A61F2002/30563; A61F2002/30576; A61F2002/30578; A61F2002/30604; A61F2002/30616; A61F2002/30621; A61F2002/30624; A61F2002/30632; A61F2002/30649; A61F2002/30769; A61F2/30771; A61F2002/30841; A61F2002/30878; A61F2002/30884; A61F2/30907; A61F2002/30919; A61F2002/30934; A61F2002/443; A61F2002/448; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0063; A61F2230/0065; A61F2230/0071; A61F2230/0095; A61F2250/00; A61F2250/0014; A61F2250/0019; A61F2250/0039; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00239; A61F2310/00293; A61F2310/00389; A61F2310/00395; A61F2310/00574; A61F2310/0058; A61F2310/00592
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
101 words
An artificial disc replacement (ADR) configured for placement between the natural endplates of upper and lower vertebral bodies having anterior and posterior portions, the ADR comprising: a superior component adapted for fixation to the upper vertebral body and providing lower articulating surface; and an inferior component adapted for fixation to the lower vertebral body and providing an upper articulating surface that cooperates with the lower surface; one or more centers of rotation (CORs) located above the natural endplate of the upper vertebral body; and one or more centers of rotation (CORs) located below the natural endplate of the upper vertebral body.
Claim 2
Dependent Claim
101 words
An artificial disc replacement (ADR) configured for placement between the natural endplates of upper and lower vertebral bodies having anterior and posterior portions, the ADR comprising: a superior component adapted for fixation to the upper vertebral body and providing lower articulating surface; and an inferior component adapted for fixation to the lower vertebral body and providing an upper articulating surface that cooperates with the lower surface; one or more centers of rotation (CORs) located above the natural endplate of the upper vertebral body; and one or more centers of rotation (CORs) located below the natural endplate of the upper vertebral body.
Claim 3
Dependent Claim
20 words
The ADR of claim 1 , wherein the lower articulating surface is convex and the upper articulating surface is concave.
Claim 4
Dependent Claim
15 words
The ADR of claim 1 , wherein the lower and upper articulating surfaces are non-congruent.
Claim 5
Dependent Claim
25 words
The ADR of claim 1 , further including at least one COR in the anterior portion and at least one COR in the posterior portion.
Claim 6
Dependent Claim
29 words
The ADR of claim 4 , wherein the cooperation between the superior and inferior components relative to the anterior and posterior centers of rotation is spherical, symmetrical, or both.
Claim 7
Dependent Claim
19 words
The ADR of claim 4 , wherein the anterior and posterior centers of rotation are at different vertical heights.
Claim 8
Dependent Claim
21 words
The ADR of claim 1 , including a substantially smooth transition surface with respect to two or more of the CORs.
Claim 9
Dependent Claim
20 words
The ADR of claim 1 , further including one or more physical features that limit translation, rotation and/or lateral bending.
Claim 10
Dependent Claim
19 words
The ADR of claim 1 , wherein the two components do not have the same number of spherical surfaces.
Claim 11
Dependent Claim
126 words
An artificial disc replacement (ADR) having two or more centers of rotation (CORs) configured for placement between the natural endplates of upper and lower vertebral bodies, each having an anterior portion and a posterior portion, the ADR comprising: a superior component adapted for fixation to the upper vertebral body and providing a lower articulating surface; an inferior component adapted for fixation to the lower vertebral body and providing an upper articulating surface; one or more centers of rotation (CORs) located above the natural endplate of the upper vertebral body; and one or more centers of rotation (CORs) located below the natural endplate of the upper vertebral body; and wherein one of the CORs is located between the posterior third and anterior two-thirds of the vertebral bodies.
Claim 12
Dependent Claim
126 words
An artificial disc replacement (ADR) having two or more centers of rotation (CORs) configured for placement between the natural endplates of upper and lower vertebral bodies, each having an anterior portion and a posterior portion, the ADR comprising: a superior component adapted for fixation to the upper vertebral body and providing a lower articulating surface; an inferior component adapted for fixation to the lower vertebral body and providing an upper articulating surface; one or more centers of rotation (CORs) located above the natural endplate of the upper vertebral body; and one or more centers of rotation (CORs) located below the natural endplate of the upper vertebral body; and wherein one of the CORs is located between the posterior third and anterior two-thirds of the vertebral bodies.
Claim 13
Dependent Claim
20 words
The ADR of claim 10 , wherein the lower articulating surface is convex and the upper articulating surface is concave.
Claim 14
Dependent Claim
15 words
The ADR of claim 10 , wherein the lower and upper articulating surfaces are non-congruent.
Claim 15
Dependent Claim
25 words
The ADR of claim 10 , further including at least one COR in the anterior portion and at least one COR in the posterior portion.
Claim 16
Dependent Claim
29 words
The ADR of claim 13 , wherein the cooperation between the superior and inferior components relative to the anterior and posterior centers of rotation is spherical, symmetrical, or both.
Claim 17
Dependent Claim
21 words
The ADR of claim 10 , including a substantially smooth transition surface with respect to two or more of the CORs.
Claim 18
Dependent Claim
20 words
The ADR of claim 10 , further including one or more physical features that limit translation, rotation and/or lateral bending.
Claim 19
Dependent Claim
19 words
The ADR of claim 10 , wherein the two components do not have the same number of spherical surfaces.
Claim 20
Dependent Claim
40 words
An artificial disc replacement (ADR) configured for positioning between vertebral bodies, comprising: a superior component with a lower articulating surface; and an inferior component with an upper articulating surface that cooperates with the lower surface through an anterior-to-posterior-oriented toroidal region.
Claim 21
Dependent Claim
40 words
An artificial disc replacement (ADR) configured for positioning between vertebral bodies, comprising: a superior component with a lower articulating surface; and an inferior component with an upper articulating surface that cooperates with the lower surface through an anterior-to-posterior-oriented toroidal region.
Claim 22
Dependent Claim
18 words
The ADR of claim 18 , further including at least one spherical articulating region adjacent the toroidal region.
Claim 23
Dependent Claim
19 words
The ADR of claim 18 , including a substantially smooth transition between the toroidal region and the spherical region.
Claim 24
Dependent Claim
15 words
The ADR of claim 18 , wherein the lower and upper articulating surfaces are non-congruent.
Claim 25
Dependent Claim
25 words
The ADR of claim 18 , further including at least one COR in the anterior portion and at least one COR in the posterior portion.
Claim 26
Dependent Claim
29 words
The ADR of claim 22 , wherein the cooperation between the superior and inferior components relative to the anterior and posterior centers of rotation is spherical, symmetrical, or both.
Claim 27
Dependent Claim
20 words
The ADR of claim 18 , further including one or more physical features that limit translation, rotation and/or lateral bending.
Claim 28
Dependent Claim
19 words
The ADR of claim 18 , wherein the two components do not have the same number of spherical surfaces.
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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) | 2007-03-16 | 2007-09-15 | 2008-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-03-16 | 2011-09-15 | 2012-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-03-16 | 2015-09-15 | 2016-03-16 | $7700.00 | Window Closed / Lapsed |