EP0639359A1
Expired / Lapsed
EP
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An endoprothesis for a shoulder joint
Assignee: Stryker Trauma GmbH
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Filing: 1994-05-20
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Granted: —
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Expires: 2014-05-20
Abstract
Abstract An endoprothesis for a shoulder joint, comprising a head portion (10) including a spherical joint surface (16) and an elongate shank portion (12) which is to be driven into the proximal humerus and which is to be connected to said head portion (10), wherein the head portion (10) includes a first threaded portion (18) cooperating with a second threaded portion (34) provided at the proximal ending of the shank portion (12) such that the distance between the head portion (10) and the shank portion (12) is adjustable.
Inventors
- 👤 Herbert F. Resch
- 👤 Holger Müller
- 👤 Bernd Robioneck
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 04:48
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/40; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30125; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2002/30476; A61F2002/30507; A61F2002/30535; A61F2002/30537; A61F2002/3055; A61F2002/30574; A61F2002/30617; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30777; A61F2002/3082; A61F2002/30878; A61F2002/30884; A61F2002/30899; A61F2002/30902; A61F2/4014; A61F2002/4018; A61F2002/4051; A61F2/4059; A61F2002/4062; A61F2220/00; A61F2220/0025; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0097
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
84 words
An endoprothesis for a shoulder joint, comprising a head portion including a spherical joint surface and an elongate shank portion which is to be driven into the proximal humerus and which is to be connected to said head portion, characterized in that the head portion (10) includes a first threaded portion (18) cooperating with a second threaded portion (34) provided at the proximal ending (32) of the shank portion (12) such that the distance between the head portion and the shank portion is adjustable.
Claim 2
Dependent Claim
27 words
The endoprothesis of claim 1, wherein the axis (22) of the first threaded portion (18) approximately extends through the center of curvature of the joint suface (16).
Claim 3
Dependent Claim
31 words
The endoprothesis of claim 1 or 2, wherein the axis (22) of the second threaded portion (34) is inclined with respect to the longitudinal axis (38) of the shank portion (12).
Claim 4
Dependent Claim
33 words
The endoprothesis of claim 3, wherein the axis (22) of the second threaded portion (34) is inclined with respect to the axis (38) of the shank portion at an angle of approximately 50°.
Claim 5
Dependent Claim
41 words
The endoprothesis of one of claims 1 to 4, wherein the first threaded portion (18) is defined by a threaded pin (18) including an outer thread (20) and wherein the second threaded portion (34) is defined by a threaded bore (34).
Claim 6
Dependent Claim
37 words
The endoprothesis of claim 5, wherein the threaded pin (18) includes longitudinal grooves extending parallel to the axis thereof and being peripherally spaced, said grooves being engaged by a locking means (14) to non-rotationally secure said pin.
Claim 7
Dependent Claim
15 words
The endoprothesis of claim 6, wherein the longitudinal grooves (28) include a rounded cross-sectional profile.
Claim 8
Dependent Claim
42 words
The endoprothesis of claim 6 or 7, wherein the head portion includes reference marks (30) which are provided at or close to the edge or at the lower side of the joint surface, which reference marks are aligned to said longitudinal grooves.
Claim 9
Dependent Claim
41 words
The endoprothesis of one of claims 5 to 9, wherein the head portion includes recesses for being engaged by a turning tool which recesses are provided at or close to the edge or at the lower side of the joint face.
Claim 10
Dependent Claim
32 words
The endoprothesis of one of claims 6 to 9, wherein four longitudinal grooves are provided each peripherally spaced at 90° and wherein the respective reference marks are formed as tool engaging recesses.
Claim 11
Dependent Claim
19 words
The endoprothesis of one of claims 5 to 10, wherein the second thread is formed in a blind bore.
Claim 12
Dependent Claim
28 words
The endoprothesis of one of claims 5 to 11, wherein a locking screw (14) is screwed into a threaded bore (40) extending transverse to the second threaded portion.
Claim 13
Dependent Claim
14 words
The endoprothesis of claim 12, wherein the locking screw (14) is a pin-type screw.
Claim 14
Dependent Claim
15 words
The endoprothesis of claim 12 or 13, wherein the locking screw includes a rounded tip.
Claim 15
Dependent Claim
27 words
The endoprothesis of one of claims 12 to 14, wherein the locking screw includes a head (56) which is formed to be engaged by a turning tool.
Claim 16
Dependent Claim
22 words
The endoprothesis of one of claims 12 to 15, wherein the shaft of the locking screw includes a transversally extending plastic insert.
Claim 17
Dependent Claim
27 words
The endoprothesis of one of claims 1 to 16, wherein a peen (44) including openings (46) for mounting bone fragments is approximately attached to the shank portion.
Claim 18
Dependent Claim
26 words
The endoprothesis of one of claims 1 to 17, wherein the shank portion includes a proximal portion including openings (50) and a smooth distal portion (52).
Claim 19
Dependent Claim
15 words
The endoprothesis of claim 18, wherein the perforated portion (48) includes axially extending elongate openings.
Claim 20
Dependent Claim
39 words
The endoprothesis of one of claims 1 to 19, wherein the shank portion includes an oval cross section at the height of the distal end of the threaded portion (34) with a reference to the longitudinal shank axis (38).
Claim 21
Dependent Claim
38 words
The endoprothesis of one of claims 1 to 20, wherein a collar (42) extending vertical with respect to the thread axis (22) is provided at the shank portion close to the proximal end of the threaded portion (34).
Claim 22
Dependent Claim
24 words
The endoprothesis of one of claims 1 to 21, wherein the head portion, the shank portion and/or the locking screw are made of metal.
Claim 23
Dependent Claim
25 words
The endoprothesis of claim 22, wherein the head portion, the shank portion and/or the locking screw are made of titan or a cobalt chrome alloy.
References Cited (Backward Citations)
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