Patent EP1138283A2 successfully refreshed from Google Patents.
EP1138283A2
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EP
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Femoral hip prosthesis
Assignee: Benoist Girard et Cie SAS
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Filing: 2001-03-26
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Granted: —
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Expires: 2021-03-26
Abstract
Abstract A prosthetic femoral component for location in a prepared socket in a femur which has been resected at a position on the proximal side of its neck (2) and which includes a tapered insert portion (4) and a proximal head portion (5), the proximal end (6) of said insert portion being adapted for location in said prepared socket and having a maximum dimension in a plane normal to the distal-proximal axis of the neck (2) which is larger than the minimum dimension of the neck (2) in a parallel plane.
Inventors
- 👤 John Andrew Storer
- 👤 Richard Eddy Field
- 👤 Neil Rushton
- 👤 Denis Pichon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3601; A61F2/3603; A61F2/30767; A61F2/3094; A61F2/30965; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30125; A61F2002/3013; A61F2002/30138; A61F2002/30153; A61F2002/30199; A61F2002/30224; A61F2002/30233; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30345; A61F2002/30354; A61F2002/30535; A61F2002/30604; A61F2/30771; A61F2002/30878; A61F2002/30904; A61F2/30907; A61F2002/30909; A61F2002/30911; A61F2/3662; A61F2002/3678; A61F2002/3686; A61F2/46; A61F2002/4631; A61F2002/4635; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008; A61F2230/001; A61F2230/0017; A61F2230/0019; A61F2230/0063; A61F2230/0069; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00179; A61F2310/00185; A61F2310/00203; A61F2310/00239; A61F2310/00389; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
90 words
A prosthetic femoral component for location in a prepared
socket in a femur which has been resected at a position on the proximal
side of its neck (2) and which includes a tapered insert portion (4)
and a proximal head portion (5), the proximal end (6) of said insert
portion being adapted for location in said prepared socket and having a
maximum dimension in a plane normal to the distal-proximal axis of the
neck (2) which is larger than the minimum dimension of the neck (2) in
a parallel plane.
Claim 2
Dependent Claim
23 words
A prosthetic femoral component as claimed in claim 1 in which
said tapered insert portion (4) is flared outwardly in a proximal
direction.
Claim 3
Dependent Claim
37 words
A prosthetic femoral component as claimed in claim 1 or claim 2
in which said tapered insert portion (4) is dimensioned to pass through
the neck (2) of the femur with which it is to be used.
Claim 4
Dependent Claim
26 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 3 in which the tapered insertion portion (4) has
a smooth finish.
Claim 5
Dependent Claim
42 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 4 in which the proximal end of the head portion
(5) is of a generally spherical shape and has a bearing surface for
co-operation with an acetabular socket.
Claim 6
Dependent Claim
35 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 4 in which the proximal end of the head portion
(5) is adapted to receive a substantially part-spherical bearing
element (20).
Claim 7
Dependent Claim
38 words
A prosthetic femoral component as claimed in claim 6 in which
the proximal end of the head portion (5) is provided with a male taper
(23) to receive a matching female taper on the part-spherical bearing
element (20).
Claim 8
Dependent Claim
35 words
A prosthetic femoral component as claimed in claim 6 or claim 7
in which the bearing element (20) has a spigot (21) adapted to engage
in a bore (22) provided in the head portion (5).
Claim 9
Dependent Claim
24 words
A prosthetic femoral component as claimed in claim 8 in which
the spigot (21) and bore (22) are tapered to provide an engaging fit.
Claim 10
Dependent Claim
30 words
A prosthetic femoral component as claimed in claim 9 in which
the spigot (25) is elongated and extends through the head portion (5)
and into the tapered insert portion (4).
Claim 11
Dependent Claim
75 words
A prosthetic femoral component as claimed in claim 6 in which
the proximal end of the head portion (5) is substantially hemispherical
as is the inner wall (26) of the bearing element (20) which has a
tapered elongate spigot (25) adapted to engage in a tapered bore (22)
in the head portion (5) to provide an engaging fit and the spigot (25)
extends through the head portion (5) and into the tapered insert
portion (4).
Claim 12
Dependent Claim
24 words
A prosthetic femoral component as claimed in any one of the
preceding claims in which the tapered insert portion (4) is made of
metal.
Claim 13
Dependent Claim
29 words
A prosthetic femoral component as claimed in any one of
preceding claims 6 to 11 in which the tapered insert portion (4) is
made of a synthetic plastics material.
Claim 14
Dependent Claim
29 words
A prosthetic femoral component as claimed in claim 13 in which
the tapered insert portion (4) and head portion (5) are made from a
synthetic resin and carbon fibres.
Claim 15
Dependent Claim
27 words
A prosthetic femoral component as claimed in claim 14 in which
the synthetic resin is PEEK (polyetheretherketone) or PBT
(polybutalieneterephthalate) into which chopped carbon fibre is
incorporated.
Claim 16
Dependent Claim
22 words
A prosthetic femoral component as claimed in claim 15 in which
the material is of a similar compressive modulus to cancellous bone.
Claim 17
Dependent Claim
31 words
A prosthetic femoral component as claimed in any one of claims
1 to 11 in which the tapered insert portion (4) and head portion (5)
are made from a ceramic material.
Claim 18
Dependent Claim
28 words
A prosthetic femoral component as claimed in claim 17 when
dependent on claims 6 to 11 in which the bearing element (20) is made
from a ceramic material.
Claim 19
Dependent Claim
23 words
A prosthetic femoral component as claimed in claims 17 and 18
in which the ceramic material is alumina zirconium or zirconium
thoughened alumina.
Claim 20
Dependent Claim
31 words
A prosthetic femoral component as claimed in any one of the
preceding claims in which the surface finish of parts which abut bone
are in the form of a cut-away honeycomb.
Claim 21
Dependent Claim
27 words
A prosthetic femoral component as claimed in any one of the
preceding claims in which the parts which abut bone are coated with
plasma sprayed hydroxyapatite (HA).
Claim 22
Dependent Claim
29 words
A prosthetic femoral component as claimed in any one of the
preceding claims in which the stem is adapted to be driven into the
bone and held without cement.
Claim 23
Dependent Claim
33 words
A prosthetic femoral component as claimed in any one of the
preceding claims in which the stem is adapted to be held by cement at
the proximal end of the insert portion (4)
Claim 24
Dependent Claim
27 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 5 and claims 17 and 19 which is formed as a
single component.
Claim 25
Dependent Claim
44 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 24 in which tapered insert portion (4) has a
general axis (10) which is inclined to the central axis (11) of the
head portion (5) in a plane radial thereto.
Claim 26
Dependent Claim
34 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 25 in which the tapered insert portion (4) is
non-circular and is adapted to prevent rotation relative to the bone.
Claim 27
Dependent Claim
31 words
A prosthetic femoral component as claimed in claim 26 in which
the cross-section of the tapered insert portion (4) is elongate in a
plane extending normal to the central axis (11).
Claim 28
Dependent Claim
28 words
A prosthetic femoral component as claimed in claims 26 or 27 in
which the cross-section of the tapered insert portion (4 is
substantially rectangular, oval, or figure-of-eight shaped.
Claim 29
Dependent Claim
40 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 28 in which the tapered insert portion (4)
extends radially away from the distal rim (12) of the head portion (5)
towards the central axis (11).
Claim 30
Dependent Claim
41 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 29 in which the distal side of the head portion
(5) is formed as a trough (13) which extends around part of the tapered
insert portion (4).
Claim 31
Dependent Claim
35 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 30 in which the distal portion of the tapered
insert portion (4) is formed with a rectangular or irregular concave
taper.
Claim 32
Dependent Claim
38 words
A prosthetic femoral component as claimed in any one of
preceding claims 1 to 31 in which the proximal end of the tapered
insert portion (4) is provided with a series of radially outwardly
extending steps or fins.
References Cited (Backward Citations)
No citation records indexed.
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