EP1240879A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hip implant assembly
Assignee: Individual
•
Filing: 2002-03-13
•
Granted: —
•
Expires: 2022-03-13
Abstract
Abstract An implant and method for replacement of the proximal portion of a femur, and specifically for replacement of the natural femoral head is provided. The implant includes a body member for insertion, in use, through the natural femoral neck and in substantial alignment therewith; a head member with a spherical portion for engagement with a natural or a prosthetic hip socket; a joining portion for joining the head member to the body member; and a rod for insertion, in use, through the transverse passage of the body member. The rod is designed such that it has a cross-sectional configuration that contacts the cortical surfaces in the bone and inhibits micro-motion within the bone. In addition, the transverse passage of the body member is configured to complement the configuration of the rod such that the need for stabilizing screws toward the distal end of the rod is eliminated when the implant is assembled within the patient.
Inventors
- 👤 Nicholas G. Sotereanos
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:33
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1742; A61B17/175; A61B17/1753; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3601; A61B17/1721; A61B17/1725; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/744; A61B17/84; A61B17/86; A61F2/30767; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30011; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30138; A61F2002/30156; A61F2002/30159; A61F2002/30171; A61F2002/30199; A61F2002/30205; A61F2002/3021; A61F2002/30217; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30354; A61F2002/30474; A61F2002/30476; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30604; A61F2002/30616; A61F2002/30667; A61F2002/30706; A61F2002/30769; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30782; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/3082; A61F2002/30827; A61F2002/30878; A61F2002/30879; A61F2002/30891; A61F2002/30906; A61F2002/30929; A61F2/3094; A61F2002/30968; A61F2/3609; A61F2002/3611; A61F2002/3625; A61F2002/3631; A61F2002/365; A61F2002/3652; A61F2/3662; A61F2002/3678; A61F2002/368; A61F2/46; A61F2002/4635; A61F2/4657; A61F2002/4666; A61F2002/4667; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0017; A61F2230/0023; A61F2230/0028; A61F2230/005; A61F2230/0063; A61F2230/0067; A61F2250/00; A61F2250/0014; A61F2250/0023; A61F2250/0036; A61F2250/0058; A61F2250/0082; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61F2310/00413; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
155 words
An implant for replacing the proximal portion of a femur having a
substantially intact natural femoral neck, medial side, lateral side, greater
trochanter and lesser trochanter, the implant comprising a body member having
a longitudinal axis, a distal end and a proximal end and being configured for
positioning, in use, in the natural femoral neck, wherein the body member has a
transverse passage through at least a portion of the distal end in a direction
transverse to the longitudinal axis of the body member, a head member having a
distal end and a proximal spherical portion configured for positioning in a
natural pr prosthetic hip socket, a joining portion positioned between the distal
end of the head member and the proximal end of the body member, and a rod
having a longitudinal axis, a proximal end and a distal end and being
configured for positioning, in use, through the transverse passage of the body
member.
Claim 2
Dependent Claim
34 words
The implant recited in Claim 1 wherein the body member is configured
for positioning, in use, in the natural femoral neck without passage of the distal
end through the lateral side of the femur.
Claim 3
Dependent Claim
23 words
The implant recited in Claim 1 or 2 wherein the body member and the
head member are integrally attached at the joining portion.
Claim 4
Dependent Claim
34 words
The implant recited in any one of Claims 1 to 3 wherein the joining
portion extends outwardly from the body member at an acute angle relative to
the longitudinal axis of the body member.
Claim 5
Dependent Claim
34 words
The implant recited in any one of Claims 1 to 3 wherein the joining
portion extends outwardly from the body member in substantial coaxial
alignment relative to the longitudinal axis of the body member.
Claim 6
Dependent Claim
18 words
The implant recited in Claim 1 wherein the body member and the head
member are separable modular components.
Claim 7
Dependent Claim
36 words
The implant recited in Claim or 6 further comprising a collar positioned
at the proximal end of the body member and configured for abutting contact, in
use, with a proximal surface of the resected femoral neck.
Claim 8
Dependent Claim
36 words
The implant recited in Claim 6 or Claim 7 dependent thereon wherein
the joining portion comprises a first engagement portion and a second
engagement portion, said engagement portions being configured for
complementary engagement with each other.
Claim 9
Dependent Claim
34 words
The implant recited in Claim 8 wherein the first engagement portion is a
recess for receiving the second engagement portion and the second engagement
portion comprises a protrusion configured for insertion in the recess.
Claim 10
Dependent Claim
29 words
The implant recited in Claim 9 wherein the protrusion has an axis which,
in use, is at an acute angle relative to the longitudinal axis of the body member.
Claim 11
Dependent Claim
28 words
The implant recited in Claim 9 wherein the protrusion has an axis which,
in use, is in substantial coaxial alignment to the longitudinal axis of the body
member.
Claim 12
Dependent Claim
30 words
The implant recited in Claim 9 wherein the protrusion extends from the
distal end of the head member and the recess is within the proximal end of the
body member.
Claim 13
Dependent Claim
30 words
The implant recited in Claim 9 wherein the recess is within the distal end
of the head member and the protrusion extends from the proximal end of the
body member.
Claim 14
Dependent Claim
27 words
The implant recited in Claim 9 further comprising a sleeve for altering
the position of a spherical portion of the head member relative to the body
member.
Claim 15
Dependent Claim
26 words
The implant recited in Claim 14 wherein the sleeve is longer than the
protrusion for extending the distance between the spherical portion and the
body member.
Claim 16
Dependent Claim
42 words
The implant recited in Claim 14 or 15 wherein the sleeve has an inner
surface and an outer surface and is mountable, in use, such that the inner
surface slides over the protrusion and the outer surface is received within the
recess
Claim 17
Dependent Claim
51 words
The implant recited in Claim 16 wherein the sleeve defines a wall
between the inner surface and the outer surface, the wall having non-uniform,
gradual thickness changes such that, in use, the central axis of the sleeve is at
an acute angle relative to the longitudinal axis of the body member.
Claim 18
Dependent Claim
34 words
The implant recited in any one of the preceding Claims further
comprising a first surface coating on at least a portion of the body member for
promoting bone ingrowth into the coating following implantation.
Claim 19
Dependent Claim
22 words
The implant recited in Claim 18 further comprising a second surface
coating on at least a portion of the first surface coating.
Claim 20
Dependent Claim
34 words
, The implant recited in any one of the preceding claims further
comprising a first surface coating on at lest a portion of the rod for promotion
bone ingrowth into the coating following implantation.
Claim 21
Dependent Claim
22 words
The implant recited in Claim 20 further comprising a second surface
coating on at least a portion of the first surface coating.
Claim 22
Dependent Claim
28 words
The implant recited in any one of the preceding Claims wherein the body
member is configured in cross-section to inhibit rotational motion of the body
member following implantation.
Claim 23
Dependent Claim
14 words
The implant recited in Claim 22 wherein the body member is triangular
in cross-section.
Claim 24
Dependent Claim
14 words
The implant recited in Claim 22 wherein the body member is fluted in
cross-section.
Claim 25
Dependent Claim
14 words
The implant recited in Claim 22 wherein the body member is scalloped
in cross-section.
Claim 26
Dependent Claim
20 words
The implant recited in any one of the preceding Claims wherein the
distal end of the body member is closed.
Claim 27
Dependent Claim
28 words
The implant recited in any one of the preceding Claims wherein the rod,
in use, extends in substantially coaxial alignment relative to the longitudinal
axis of the femur.
Claim 28
Dependent Claim
18 words
The implant recited in Claim 27 wherein the rod and the body member
are slidably and lockingly engaged.
Claim 29
Dependent Claim
14 words
The implant recited in Claim 28 wherein the locking engagement is a
taper lock.
Claim 30
Dependent Claim
42 words
The implant of Claim 28 or 29 wherein the rod is a dual wedge in cross-section,
wherein the dual wedge gradually tapers from the proximal end of the
distal end, and wherein the transverse passage is configured to complement said
dual wedge.
Claim 31
Dependent Claim
37 words
The implant recited in any one of the preceding Claims further
comprising a locking passage through at least a portion of the body member in
a direction substantially coaxial to the longitudinal axis of the body member.
Claim 32
Dependent Claim
17 words
The implant recited in Claim 30 further comprising a locking screw for
passage into the locking passage.
Claim 33
Dependent Claim
258 words
An implant for replacing the proximal portion of a femur having a
substantially intact natural femoral neck, medial side, lateral side, greater
trochanter and lesser trochanter, the implant comprising a plurality of modular
components of varying sizes within anatomical ranges for accommodating
varying patient body dimensions, the components comprising a body member
having a longitudinal axis, a distal end having a transverse passage in a
direction transverse to the longitudinal axis of the body member and a locking
passage in a direction substantially coaxial to the longitudinal axis of the body
member, a proximal end having an engagement surface thereon, the body
member being coated on at least a portion thereof with at least one layer of a
material for promoting bone ingrowth and being configured for positioning, in
use, in the natural femoral neck, a head member having a distal end and a
proximal spherical portion configured for positioning in a natural or prosthetic
hip socket, the distal end of the head member having an engagement surface
configured for complementary engagement with the engagement surface of the
proximal end of the body member for joining the distal end of the head member
to the proximal end of the body member, an optional member for optionally
altering the position of the spherical portion of the head member relative the
body member, and a rod having a proximal end and a distal end, wherein the
rod extends through the transverse passage of the body member and is in
substantially coaxial alignment relative to the longitudinal axis of the femur.
Claim 34
Dependent Claim
42 words
The implant recited in Claim 33 wherein the engagement surface of the
distal end of the head member is a recess and the engagement surface of the
proximal end of the body member is a protrusion configured for insertion into
the recess.
Claim 35
Dependent Claim
33 words
The implant recited in Claim 34 wherein the protrusion has an axis
which, when in engagement with the recess, is at an acute angle relative to the
longitudinal axis of the body member.
Claim 36
Dependent Claim
32 words
The implant recited in Claim 34 wherein the protrusion has an axis
which, when in engagement with the recess, is in substantial coaxial alignment
to the longitudinal axis of the body member.
Claim 37
Dependent Claim
62 words
The implant recited in Claim 34 wherein the optional member for
optionally altering the position of the spherical portion of the head member
relative to the body member is a sleeve having an inner surface and an outer
surface and being mountable, in use, such that the inner surface slides over the
protrusion and the outer surface is received within the recess.
Claim 38
Dependent Claim
26 words
The implant recited in Claim 37 wherein the sleeve is longer than the
protrusion for extending the distance between the spherical member and the
body member.
Claim 39
Dependent Claim
51 words
The implant recited in Claim 38 wherein the sleeve defines a wall
between the inner surface and the outer surface, the wall having non-uniform,
gradual thickness changes such that, in use, the central axis of the sleeve is at
an acute angle relative to the longitudinal axis of the body member.
Claim 40
Dependent Claim
46 words
The implant recited in any one of Claims 33 to 39 wherein the
engagement surface of the distal end of the head member is a protrusion and the
engagement surface of the proximal end of the body member is a recess
configured for receiving the protrusion.
Claim 41
Dependent Claim
33 words
The implant recited in Claim 40 wherein the protrusion has an axis
which, when in engagement with the recess, is at an acute angle relative to the
longitudinal axis of the body member.
Claim 42
Dependent Claim
32 words
The implant recited in Claim 40 wherein the protrusion has an axis
which, when in engagement with the recess, is in substantial coaxial alignment
to the longitudinal axis of the body member.
Claim 43
Dependent Claim
46 words
The implant recited in any one of Claims 33 to 42 wherein the rod is a
dual wedge in cross-section, wherein the dual wedge gradually tapers from the
proximal end to the distal end, and wherein the first passage is configured to
complement said dual wedge.
References Cited (Backward Citations)
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