Patent EP0985386A2 successfully refreshed from Google Patents.
EP0985386A2
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EP
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Femoral stem attachment for a modular knee prosthesis
Assignee: DePuy Products Inc
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Filing: 1999-09-08
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Granted: —
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Expires: 2019-09-08
Abstract
Abstract The present invention provides a knee prosthesis having a femoral component having a pair of spaced apart condylar portions and a boss structure extending between the condylar portions. The boss structure has a top surface that extends generally horizontally in a transverse plane and an opposed inferior surface. The knee prosthesis also includes a stem component having a proximal end and a distal end. The knee prosthesis further includes an attachment nut for securing the stem member to the femoral component.
Inventors
- 👤 Michael O'neil
- 👤 Justin Dye
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:11
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/38; A61F2/3859; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30154; A61F2002/30199; A61F2002/30261; A61F2002/30266; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2002/30433; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/30604; A61F2002/30616; A61F2002/30667; A61F2002/30708; A61F2/30721; A61F2/30728; A61F2002/30729; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2002/30827; A61F2002/30828; A61F2002/30878; A61F2002/30886; A61F2/46; A61F2/4637; A61F2002/4638; A61F2220/00; A61F2220/0025; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0021; A61F2230/0063; A61F2230/0082; A61F2250/00; A61F2250/0004; A61F2250/0006; A61F2250/0058; A61F2250/0084
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
146 words
A modular knee prosthesis comprising: a first component having a pair of spaced apart condylar portions and a
boss structure extending between the condylar portions, the boss structure
having a superior mounting surface that extends generally horizontally in a
transverse plane and an opposed inferior surface having a cavity formed
therein that terminates in a substantially spherically shaped endwall, wherein
an aperture extends between the superior mounting and inferior surfaces of the
boss structure; a second component having a distal mounting surface mountable on the
superior mounting surface of the boss structure, the distal mounting surface of
the second component and superior mounting surface of the boss structure
defining a selected mounting angle therebetween; and a third component for securing the second component to the first
component, the third component having a spherically shaped superior surface
for engaging the spherically shaped endwall of the boss structure.
Claim 2
Dependent Claim
22 words
The knee prosthesis of claim 1, wherein the second component is an
elongate stem and the third component is an attachment nut.
Claim 3
Dependent Claim
24 words
The knee prosthesis of claim 2, wherein at least a portion of the stem is
threaded so as to threadably engage the attachment nut.
Claim 4
Dependent Claim
31 words
The knee prosthesis of claim 3, wherein the distal end of the stem
component is offset a selected distance in the transverse plane relative to the
proximal end of the stem.
Claim 5
Dependent Claim
30 words
The knee prosthesis of claim 1, wherein the second component is a
collar having a body portion with an aperture extending therethrough and the
third component is an attachment nut.
Claim 6
Dependent Claim
39 words
The knee prosthesis of claim 5, wherein the knee prosthesis further
comprises a stem component having a proximal end and a distal end which is
mountable through the collar aperture and further extends into and through the
boss aperture.
Claim 7
Dependent Claim
20 words
The knee prothesis of claim 6, wherein the collar is positionable
between the stem component and the femoral boss structure.
Claim 8
Dependent Claim
26 words
The knee prosthesis of claim 7, wherein the boss structure includes an
anti-rotation means for preventing rotation of the collar when mounted on the
boss structure.
Claim 9
Dependent Claim
41 words
The knee prosthesis of claim 1, wherein the mounting angle of the
mounting surface of the second component is in the range of 1° to about 15° in
the medial-lateral direction in the transverse plane, to the medial or lateral
side.
Claim 10
Dependent Claim
170 words
A modular knee prosthesis comprising: a femoral component having a pair of spaced apart condylar portion
and a boss structure extending between the condylar portions, the boss
structure having a superior mounting surface that extends generally
horizontally in a transverse plane and an opposed inferior surface having a
cavity formed therein that terminates in a substantially spherically shaped
endwall, wherein an aperture extends between the superior and inferior
surfaces of the boss structure; a stem component having a proximal end and a distal end; a collar member mountable on the superior surface of the boss
structure, the collar member having a superior and an inferior surface that is
substantially transverse to a longitudinal axis of the stem member when
mounted thereon, the collar inferior surface and the superior mounting surface
of the boss structure defining a selected mounting angle therebetween, the
collar member further having an aperture extending between the superior and
inferior surfaces; and an attachment nut for securing the stem member and collar member to
the femoral component.
Claim 11
Dependent Claim
40 words
The knee prosthesis of claim 10, wherein the mounting angle of the
inferior surface of the collar is in the range of 1° and about 15° in the medial-lateral
direction in the transverse plane, to the medial or lateral side.
Claim 12
Dependent Claim
26 words
The knee prosthesis of claim 10, wherein the boss structure includes an
anti-rotation means for preventing rotation of the collar when mounted on the
boss structure.
Claim 13
Dependent Claim
29 words
The knee prosthesis of claim 10, wherein at least a portion of the distal
end of the stem component is threaded so as to threadably engage the
attachment nut.
Claim 14
Dependent Claim
31 words
The knee prosthesis of claim 10, wherein the distal end of the stem
component is offset a selected distance in the transverse plane relative to the
proximal end of the stem.
Claim 15
Dependent Claim
25 words
The knee prosthesis of claim 10, wherein the attachment nut has
spherically shaped superior surface for engaging the spherically shaped
endwall of the boss structure.
Claim 16
Dependent Claim
146 words
A modular knee prosthesis comprising: a femoral component having a pair of spaced apart condylar portions
and a boss structure extending between the condylar portions, the boss
structure having a top surface that extends generally horizontally in a
transverse plane and an opposed bottom surface having a cavity formed
therein that terminates in a substantially spherically shaped endwall, wherein
an aperture extends between the top and bottom surfaces of the boss structure; a stem component having a proximal end and a distal end that is
mountable through the boss aperture, the distal end of the stem further
including a mounting surface which along with the top surface of the boss
structure defines a selected mounting angle therebetween; and an attachment nut having a spherically shaped superior surface for
engaging the spherically shaped endwall of the boss structure for securing the
stem member to the femoral component.
References Cited (Backward Citations)
No citation records indexed.
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