Patent US3311844A successfully refreshed from Google Patents.
Patent EP0382429A2 successfully refreshed from Google Patents.
EP0382429A2
Expired / Lapsed
EP
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Modular hip prosthesis
Assignee: Smith and Nephew Inc
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Filing: 1990-02-02
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Granted: —
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Expires: 2010-02-02
Abstract
Abstract A modular hip prosthesis can be custom fitted to a particular patient by a surgeon prior to surgical insertion comprising (i) a prosthesis a body having a neck portion for carrying a rounded head element, a transitional mid-section of the prosthesis body and a stem section and (ii) means attachable to the prosthesis body to adjust and maintain the prosthesis in load bearing engagement with the femur. A tubular extension sleeve to the stem may have an open end portion to receive the stem body. The stem may also include an integral bore, and an attachment in the form of an elonagated screw is provided for connection to the stem internal bore for securing the extension sleeve and the prosthesis body together, forming a compressive sealed connection therebetween. Pads can be attached to the transitional mid-section of the prosthesis body for increasing the cross-sectional shape of the prosthesis at the transitional mid-section. Removable collars can be added to the prosthesis to form a transverse load carrying interface with the upper end of the patient's femur. Frustro-conically shaped extension sleeves can be added to the prosthesis neck for extending the neck length.
Inventors
- 👤 Michael Demane
- 👤 Steve Garner
- 👤 Thomas Wade Fallin
- 👤 Jeff Schryver
- 👤 Robert Brosnahan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30721; A61F2/30728; A61F2/30724; A61F2/30734; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2/3672; A61F2/3676; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30116; A61F2002/30131; A61F2002/30159; A61F2002/30171; A61F2002/30182; A61F2002/30187; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30354; A61F2002/30433; A61F2002/30474; A61F2002/30476; A61F2002/30492; A61F2002/30535; A61F2002/30594; A61F2002/30604; A61F2002/30616; A61F2002/30729; A61F2002/30738; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/30795; A61F2002/30797; A61F2/30907; A61F2002/30919; A61F2/3609; A61F2002/3625; A61F2002/365; A61F2002/3678; A61F2002/3686; A61F2002/3694; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0013; A61F2230/0028; A61F2230/0034; A61F2230/005
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
79 words
A modular hip prosthesis that can be modified to individual requirements prior to insertion comprising a prosthesis body having an upper end portion with a neck adapted to carry a rounded head portion which engages with the acetabulum or with an acetabular prosthesis and a lower stem portion adapted for placement in the intramedullary canal of the femur and means attachable to the prosthesis body for adjusting and maintaining the prosthesis body in load bearing engagement with the femur.
Claim 2
Dependent Claim
79 words
A modular hip prosthesis that can be modified to individual requirements prior to insertion comprising a prosthesis body having an upper end portion with a neck adapted to carry a rounded head portion which engages with the acetabulum or with an acetabular prosthesis and a lower stem portion adapted for placement in the intramedullary canal of the femur and means attachable to the prosthesis body for adjusting and maintaining the prosthesis body in load bearing engagement with the femur.
Claim 3
Dependent Claim
17 words
A prosthesis as claimed in claim 1 wherein the lower stem portion terminates at a rounded tip.
Claim 4
Dependent Claim
79 words
A prosthesis as claimed in claim 1 or claim 2 wherein the lower stem portion is provided with an internal bore and the attachable means is a tubular stem extension sleeve having a hollowed portion correspond in shape to that of the stem portion including an open end portion adapted to receive the stem portion herein and wherein the extension sleeve is secured to the prosthesis body by attachment means connectable to the internal bore of the stem portion.
Claim 5
Dependent Claim
82 words
A prosthesis as claimed in any one of the preceding claims wherein the attachable means comprises a removable pad means attachable by connection to a mid-section of the prosthesis body intermediate the upper and lower portions for thereby to increase the cross-sectional area of the prosthesis at the mid-section, wherein said connection means are carried in part by the pad means and are adapted to be continuously loaded by hip joint reaction force to secure the pad means to the prosthesis body.
Claim 6
Dependent Claim
129 words
A modular hip prothesis that can be custom fitted to a particular patient by a surgeon prior to surgical insertion comprising: a) a hip prosthesis body having a wider upper end portion with a neck adapted for carrying a round head portion that fits the patient's acetabulum, and a lower stem portion including an internal bore and terminating at a rounded tip and adapted for placement in the intramedullary canal of the patient's femur and b) a tubular stem extension sleeve having a hollowed portion corresponding in shape to the lower stem portion and including an open end portion adapted to receive the stem portion therein; c) attachment means connectable to the internal bore of the stem for securing the extension sleeve and prosthesis body together, forming seal therebetween.
Claim 7
Dependent Claim
129 words
A modular hip prothesis that can be custom fitted to a particular patient by a surgeon prior to surgical insertion comprising: a) a hip prosthesis body having a wider upper end portion with a neck adapted for carrying a round head portion that fits the patient's acetabulum, and a lower stem portion including an internal bore and terminating at a rounded tip and adapted for placement in the intramedullary canal of the patient's femur and b) a tubular stem extension sleeve having a hollowed portion corresponding in shape to the lower stem portion and including an open end portion adapted to receive the stem portion therein; c) attachment means connectable to the internal bore of the stem for securing the extension sleeve and prosthesis body together, forming seal therebetween.
Claim 8
Dependent Claim
23 words
A prosthesis as claimed in any one of claims 3 to 5 wherein the tubular stem extension sleeve is of generally uniform cross-section.
Claim 9
Dependent Claim
20 words
A prosthesis according to any one of claims 3 to 6 wherein the tubular stem extension sleeve is substantially straight.
Claim 10
Dependent Claim
27 words
A prosthesis according to any one of claims 3 to 6 wherein the tubular stem extension is curved to conform to the shape of the intramedullary canal.
Claim 11
Dependent Claim
54 words
A prosthesis according to any one of claims 3 to 6 wherein the prosthesis body has a longitudinal central open ended bore extending substantially the length thereof, and the attachment means includes in part an elongated fastener that is adapted for placement in the bore extending substantially the length of the bore upon assembly.
Claim 12
Dependent Claim
38 words
A prosthesis according to claim 9 wherein the fastener is a bolt having a threaded lower end portion and the stem extension sleeve includes a threaded section that can engage the threaded lower end portion of the bolt.
Claim 13
Dependent Claim
23 words
A prosthesis according to any one of claims 3 to 10 wherein the internal bore has one open end portion and the bore.
Claim 14
Dependent Claim
32 words
A prosthesis according to claim 11 wherein the bore has female threaded portion and the attachment means includes a threaded fastener that can threadably engage the female threaded portion of the bore.
Claim 15
Dependent Claim
109 words
A modular hip prosthesis that can be custom fitted to a particular patient by a surgeon prior to surgical insertion comprising: a) a hip prosthesis body having an upper end portion with a neck adapted for carrying a rounded head portion that fits the patient's acetabulum, and a lower stem portion adapted for placement in the intramedullary canal of the patient's femur; b) removable pad means attachable to the mid-section for increasing the cross-sectional area of the prosthesis at the mid-section; and c) connection means carried in part by the pad means and continuously loaded by hip joint reaction force for securing the pad means to the prosthesis body.
Claim 16
Dependent Claim
109 words
A modular hip prosthesis that can be custom fitted to a particular patient by a surgeon prior to surgical insertion comprising: a) a hip prosthesis body having an upper end portion with a neck adapted for carrying a rounded head portion that fits the patient's acetabulum, and a lower stem portion adapted for placement in the intramedullary canal of the patient's femur; b) removable pad means attachable to the mid-section for increasing the cross-sectional area of the prosthesis at the mid-section; and c) connection means carried in part by the pad means and continuously loaded by hip joint reaction force for securing the pad means to the prosthesis body.
Claim 17
Dependent Claim
48 words
A prosthesis according to any one of the preceding claims further comprising attachable collar means affixable to the wide portion of the prosthesis body generally transverse to the longitudinal axis of the prosthesis body for forming a load carrying interface with the upper end of the patient's femur.
Claim 18
Dependent Claim
34 words
A prosthesis according to any one of claims 1 to 12 or 14 comprising removable pad means attachable to the transitional mid-section for increasing the cross-sectional area of the prosthesis at the transitional mid-section.
Claim 19
Dependent Claim
49 words
A prosthesis as claimed in any one of claims 1 to 4 or 13 to 16 comprising a transverse opening in the prosthesis at the transitional mid-section and means carried by the pad means, and extending into the transverse opening for holding the pad means to the prosthesis body.
Claim 20
Dependent Claim
26 words
A prosthesis as claimed in claim 16 wherein the pad means comprises a pair of pad members, each carrying at least in part the holding means.
Claim 21
Dependent Claim
29 words
A prosthesis as claimed in claim 17 wherein the holding means includes in part a locking bolt that fits generally between the pair of pads forming a connection therebetween.
Claim 22
Dependent Claim
31 words
A prosthesis as claimed in any one of claims 14 to 18 wherein the body carries one or more openings and the pad means attaches to the body at the openings.
Claim 23
Dependent Claim
35 words
A prosthesis as claimed in any one of claims 1 to 4 or 13 to 19 wherein the pad means comprises a pair of pads, each having an inside surface that carries the connection means.
Claim 24
Dependent Claim
39 words
A prosthesis as claimed in claim 20 wherein each pad has a projection thereon extending from the inside surface and the connection means includes locking means carried by the projection for forming a releasable connection with the prosthesis body.
Claim 25
Dependent Claim
47 words
A prosthesis as claimed in claim 20 wherein the prosthesis body has a pair of opposed sockets interior and posterior, each defined by a peripheral sidewall, each socket respectively being correspondingly shaped to a pad so that each pad registers within the peripheral edge of a socket.
Claim 26
Dependent Claim
39 words
A prosthesis as claimed in claim 20 wherein each pad has an interior surface shaped to register upon the prosthesis body outer surface, and an outer pad surface having a shape that differs from the pad inner surface shape.
Claim 27
Dependent Claim
20 words
A prosthesis as claimed in claim 22 wherein the sockets communicate, defining together a transverse opening through the prosthesis body.
Claim 28
Dependent Claim
64 words
A prosthesis as claimed in any one of claims 1 to 4 or 13 to 24 wherein the connection means comprises: a locking tab carried by the pad means; socket means form on the prosthesis body and shaped to recieve the pad means; a pair of frictionally engaging load transfer surface carried respectively by the tab and by the prosthesis body at the socket.
Claim 29
Dependent Claim
57 words
A prosthesis as claimed in any one of claims 1 to 4 or 13 to 25 wherein the connection means includes wedge means for tightening the connection between the pad means and the prosthesis body as the pad means are moved longitudinally with respect to the prosthesis body longitudinal axis when the load transfer surfaces are engaged.
Claim 30
Dependent Claim
33 words
A prosthesis as claimed in any one of claims 1 to 4 or 13 to 26 wherein the removable pad means is attachable to the anterior or posterior side of the prosthesis body.
Claim 31
Dependent Claim
86 words
A prosthesis as claimed in any one of the preceding claims wherein the neck of the upper portion is of a generally conical shape and wherein the prosthesis further comprises a neck extension sleeve having a hollowed portion corresponding in shape to the neck and including an open end portion receptive of the neck for insertion thereinto; said extension sleeve having an outer surface that corresponds in shape to the neck so that the rounded head portion can interchangably fit the neck and the extension sleeve.
Claim 32
Dependent Claim
19 words
A prosthesis as claimed in claim 28 wherein the neck extension sleeve is of a generally uniform longitudinal cross-section.
Claim 33
Dependent Claim
18 words
A prosthesis as claimed in claim 28 or 29 wherein the extension has a wall of uniform thickness.
Claim 34
Dependent Claim
21 words
A prosthesis as claimed in any one of claims 28 to 30 wherein the neck has a frustro-conically shaped outer surface.
Claim 35
Dependent Claim
42 words
A prosthesis as claimed in any one of claims 28 to 31 comprising a frustro-conically shaped closed socket in the rounded head element for selectively registering the head element upon the neck, or upon the extension sleeve, for extending the neck length.
Claim 36
Dependent Claim
28 words
A prosthesis as claimed in any one of claims 28 to 32 wherein the outer extension sleeve is an annular member having corresponding inner and outer shaped surfaces.
Claim 37
Dependent Claim
49 words
A prosthesis as claimed in any one of claims 14 to 33 further comprising securing means for holding the collar to the prosthesis body and comprising in part a pin bore at least partially extending through the collar means and pin means that can extend into the pin bore.
Claim 38
Dependent Claim
31 words
A prosthesis body as claimed in claim 34 wherein the pin bore has a closed end portion that defines a stop for movement of the pin means within the pin bore.
Claim 39
Dependent Claim
33 words
A prosthesis as claimed in any one of claims 14 to 35 wherein the collar means include distal offset means for replacing bone loss in the medial proximal area of the patient's femur.
Claim 40
Dependent Claim
28 words
A prosthesis as claimed in claim 36 wherein the distal offset means includes a tab portion that extends downwardly from the transverse plane of the bearing collar means.
Claim 41
Dependent Claim
24 words
A hip prosthesis claimed in claim 36 or 37 wherein the distal offset means is attached to the medial portion of the collar means.
Claim 42
Dependent Claim
28 words
A prosthesis as claimed in any one of claims 3 to 38 wherein the stem extension sleeve has a bore that extends substantially the length of the sleeve.
Claim 43
Dependent Claim
21 words
A prosthesis as claimed in claim 39 wherein the sleeve has a bore that extends partially the length of the sleeve.
References Cited (Backward Citations)
No citation records indexed.
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