Patent US5246459A successfully refreshed from Google Patents.
US5246459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular tibial support pegs for the tibial component of a prosthetic knee replacement system
Assignee: Individual
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Filing: 1992-02-24
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Granted: 1993-09-21
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Expires: 2012-02-24
Abstract
Abstract A modular tibial support peg operable to secure a tibial component of a knee joint prosthesis to a tibia having a groove. The modular tibial support peg includes a cylindrical body with a ridged outer surface operable to engage the groove in the tibia. The modular tibial support peg further includes a plurality of spikes extending inferiorly from the cylindrical body. The spikes are operable to engage the tibia at the inferior end of the groove.
Inventors
- 👤 Sarmed G. Elias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
137 words
In combination, a tibial support peg for securing a tibial component of a knee joint prosthesis to a tibia having a groove with an inferior end, said tibial component including a backing portion, a tibial stem extending from said backing portion, said tibial stem having a bulbous portion and a fluted stem portion, said fluted stem portion extending inferiorly from said bulbous portion, said tibial support peg comprising: a cylindrical body extending from said backing portion, said cylindrical body engageable with said groove in said tibia; and a plurality of spikes extending inferiorly from the cylindrical body, said spikes being engageable with said tibia at said inferior end of said groove, said cylindrical body and said plurality of spikes of said tibial support peg cooperating with said tibial stem to secure said tibial component to said tibia.
Claim 2
Dependent Claim
137 words
In combination, a tibial support peg for securing a tibial component of a knee joint prosthesis to a tibia having a groove with an inferior end, said tibial component including a backing portion, a tibial stem extending from said backing portion, said tibial stem having a bulbous portion and a fluted stem portion, said fluted stem portion extending inferiorly from said bulbous portion, said tibial support peg comprising: a cylindrical body extending from said backing portion, said cylindrical body engageable with said groove in said tibia; and a plurality of spikes extending inferiorly from the cylindrical body, said spikes being engageable with said tibia at said inferior end of said groove, said cylindrical body and said plurality of spikes of said tibial support peg cooperating with said tibial stem to secure said tibial component to said tibia.
Claim 3
Dependent Claim
24 words
The tibial support peg according to claim 1, wherein said cylindrical body has a length selected to accommodate for bone deficiencies in said tibia.
Claim 4
Dependent Claim
32 words
The tibial support peg of claim 1, wherein said cylindrical body includes an inner surface which receives a portion of said tibia when said cylindrical body engages said groove in said tibia.
Claim 5
Dependent Claim
33 words
The tibial support peg according to claim 1, wherein the cylindrical body includes an outer surface having a plurality of longitudinally extending ridges, said plurality of longitudinally extending ridges engageable with said groove.
Claim 6
Dependent Claim
27 words
The tibial support peg according to claim 1, wherein said plurality of spikes have tapered end portions to facilitate insertion of said cylindrical body into said groove.
Claim 7
Dependent Claim
30 words
The tibial support peg according to claim 1, wherein said cylindrical body includes an inner surface which receives bone graft when said cylindrical body engages said groove in said tibia.
Claim 8
Dependent Claim
20 words
The tibial support peg according to claim 1, wherein said cylindrical body has an inner surface which receives bone cement.
Claim 9
Dependent Claim
145 words
In combination, a modular tibial support peg for securing a tibial component of a knee joint prosthesis to a tibia having a groove with an inferior end, said tibial component including a backing portion, a tibial stem extending from said backing portion, said tibial stem having a bulbous portion and a fluted stem portion, said fluted stem portion extending inferiorly from said bulbous portion, said modular tibial support peg comprising: a cylindrical body extending from said backing portion and being engageable within said groove of said tibia, said cylindrical body having an outer surface with a plurality of longitudinally extending ridges disposed thereon; and a tibial bolt engaging said tibial component at a first end and said cylindrical body at a second end, said cylindrical body of said modular tibial support peg cooperating with said tibial stem to secure said tibial component to said tibia.
Claim 10
Dependent Claim
145 words
In combination, a modular tibial support peg for securing a tibial component of a knee joint prosthesis to a tibia having a groove with an inferior end, said tibial component including a backing portion, a tibial stem extending from said backing portion, said tibial stem having a bulbous portion and a fluted stem portion, said fluted stem portion extending inferiorly from said bulbous portion, said modular tibial support peg comprising: a cylindrical body extending from said backing portion and being engageable within said groove of said tibia, said cylindrical body having an outer surface with a plurality of longitudinally extending ridges disposed thereon; and a tibial bolt engaging said tibial component at a first end and said cylindrical body at a second end, said cylindrical body of said modular tibial support peg cooperating with said tibial stem to secure said tibial component to said tibia.
Claim 11
Dependent Claim
35 words
The modular tibial support peg of claim 8, wherein said tibia has an anatomical configuration and said cylindrical body has a length, said length of said cylindrical body accommodates said anatomical configuration of said tibia.
Claim 12
Dependent Claim
29 words
The modular tibial support peg of claim 8, wherein said cylindrical body is hollow and has an inner surface which receives a column of bone defined by said groove.
Claim 13
Dependent Claim
26 words
The modular tibial support peg according to claim 10, wherein said tibial bolt includes a toroidal head portion engageable with a counterbore in said tibial component.
Claim 14
Dependent Claim
40 words
The modular tibial support peg according to claim 11, wherein said cylindrical body includes a plurality of spikes which extend inferiorly from said cylindrical body, said plurality of spikes engageable with said tibia at said inferior end of said groove.
Claim 15
Dependent Claim
24 words
The modular tibial support peg according to claim 12, wherein said cylindrical body has a length which accommodates for bone deficiencies in said tibia.
Claim 16
Independent Claim
229 words
A method for securing a tibial component of a knee joint prosthesis to a tibia, said tibial component having a metal backed portion, said method comprising the steps of: providing a tibial support peg including a cylindrical body having an inner surface and an outer surface; providing a tibial stem extending from said metal backed portion, said tibial stem having a bulbous portion and a fluted stem portion, said fluted stem portion extending inferiorly from said bulbous portion; preparing said tibia for receiving said tibial component including forming a longitudinal cylindrical groove in said tibia for receiving said tibial support peg and forming a cavity in said tibia for receiving said tibial stem; insert a tibial bolt having a distal end partially through a bore formed in said metal backed portion such that said distal end of said tibial bolt engages said inner surface of said cylindrical body, said tibial bolt having a head portion operable to engage said bore of said metal backed portion to allow said cylindrical body to extend from said metal backed portion; inserting said tibial stem into said cavity; inserting said tibial support peg into said longitudinal cylindrical groove such that said outer surface of said tibial support peg engages said longitudinal cylindrical groove; and allowing said tibial support peg and said tibial stem to cooperate to secure said tibial component to said tibia.
Claim 17
Independent Claim
229 words
A method for securing a tibial component of a knee joint prosthesis to a tibia, said tibial component having a metal backed portion, said method comprising the steps of: providing a tibial support peg including a cylindrical body having an inner surface and an outer surface; providing a tibial stem extending from said metal backed portion, said tibial stem having a bulbous portion and a fluted stem portion, said fluted stem portion extending inferiorly from said bulbous portion; preparing said tibia for receiving said tibial component including forming a longitudinal cylindrical groove in said tibia for receiving said tibial support peg and forming a cavity in said tibia for receiving said tibial stem; insert a tibial bolt having a distal end partially through a bore formed in said metal backed portion such that said distal end of said tibial bolt engages said inner surface of said cylindrical body, said tibial bolt having a head portion operable to engage said bore of said metal backed portion to allow said cylindrical body to extend from said metal backed portion; inserting said tibial stem into said cavity; inserting said tibial support peg into said longitudinal cylindrical groove such that said outer surface of said tibial support peg engages said longitudinal cylindrical groove; and allowing said tibial support peg and said tibial stem to cooperate to secure said tibial component to said tibia.
Claim 18
Dependent Claim
52 words
The method according to claim 14, wherein said step of providing a tibial support peg includes the step of forming a plurality of spikes on said cylindrical body, said step of inserting said tibial support peg into said longitudinal cylindrical groove further includes the step of embedding said spikes into said tibia.
Claim 19
Dependent Claim
65 words
The method according to claim 15, wherein said step of providing a tibial support peg includes the step of forming a plurality of longitudinally extending ridges along the outer surface of said cylindrical body, the step of inserting said tibial support peg into said longitudinal cylindrical groove further includes the step of driving said longitudinally extending ridges into said wall of said longitudinal cylindrical groove.
Claim 20
Dependent Claim
58 words
The method according to claim 16, wherein the step of preparing said tibia for receiving said metal backed portion includes the steps of drilling a hole in said tibia until cortical material is reached; measuring the depth of said hole; and selecting the length of said tibial support peg .-which approximately corresponds to the depth of said hole.
Claim 21
Dependent Claim
33 words
The method according to claim 17, wherein said step of preparing said tibia for receiving said metal backed portion includes the step of using a hole saw to form said longitudinal cylindrical groove.
Claim 22
Dependent Claim
42 words
The method according to claim 18, wherein the step of inserting said tibial support peg into said longitudinal cylindrical groove includes the step of causing a portion of said tibia to be disposed within said inner surface of said tibial support peg.
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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) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |