EP0146192A1
Expired / Lapsed
EP
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Joint prosthesis
Assignee: Individual
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Filing: 1984-12-13
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Granted: —
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Expires: 2004-12-13
Abstract
Abstract A joint prosthesis comprising two co-operating prosthesis members fastening each to a different joint bone. At least one of the prosthesis members is formed by at least two prosthesis elements one surrounding the other, the one prosthesis element adjacent the bone being provided with fastening means distributed along the outer face and being located inside the outer face when the joint prosthesis is being applied, out of which outer face they can subsequently be moved in order to cause them to penetrate into the bone.The fastening means are formed by pins guided in passages of the prosthesis element. The tipform of these pins could be chosen in relation to the hardness of the bone to be penetrated.Furthermore, the contact faces of the two prosthesis elements could be provided with coating mimicing the elastic and/or resilientfeatures of bone.
Inventors
- 👤 Jonas Lindwer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/30721; A61F2/30734; A61F2/34; A61F2/38; A61F2/46; A61F2/4603; A61F2/30767; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30069; A61F2002/3007; A61F2002/30316; A61F2002/30535; A61F2002/30579; A61F2002/30594; A61F2002/30738; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30787; A61F2002/30841; A61F2002/30929; A61F2002/3412; A61F2/3609; A61F2002/365; A61F2002/3678; A61F2002/368; A61F2002/3694; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00029; A61F2310/00389; A61F2310/00395
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
87 words
A joint prosthesis comprising two co-operating prosthesis members each to a different joint bone characterized in that at least one of the prosthesis members is formed by at least two prosthesis elements one surrounding the other, the one prosthesis element adjacent the bone being provided with fastening means distributed along the outer face and being located inside the outer face when the joint prosthesis is being applied, out of which outer face they can subsequently be moved in order to cause them to penetrate into the bone.
Claim 2
Dependent Claim
87 words
A joint prosthesis comprising two co-operating prosthesis members each to a different joint bone characterized in that at least one of the prosthesis members is formed by at least two prosthesis elements one surrounding the other, the one prosthesis element adjacent the bone being provided with fastening means distributed along the outer face and being located inside the outer face when the joint prosthesis is being applied, out of which outer face they can subsequently be moved in order to cause them to penetrate into the bone.
Claim 3
Dependent Claim
25 words
A joint prosthesis as claimed in claim 1 characterized in that the fastening means are formed by pins guided in passages of the prosthesis element.
Claim 4
Dependent Claim
25 words
A joint prosthesis as claimed in claim 2 characterized in that the pins are split pins and a splitting partition is provided in the passages.
Claim 5
Dependent Claim
47 words
A joint prothesis as claimed in claim 2 or 3, characterized in that the pins have conical, rounded-off tips, preferably various types of said pins are used, having tips with an acute to blunt form, choosen in relation to the hardness fo the bone to be penetrated.
Claim 6
Dependent Claim
23 words
A joint prosthesis as claimed in claims 2 to 4 characterized in that sequences of pins are fastened to a strip of material.
Claim 7
Dependent Claim
23 words
A joint prosthesis as claimed in claim 5, characterized in that a prosthesis element has a slot for receiving the strip of material.
Claim 8
Dependent Claim
26 words
A joint prosthesis as claimed in claim 5 or 6 characterized in that the strip of material is fastened at one end to the prosthesis element.
Claim 9
Dependent Claim
37 words
A joint prosthesis as claimed in anyone of the preceding claims characterized in that at least one of the relative contact faces of the two prosthesis elements is provided with a coating of e resilient synthetic resin.
Claim 10
Dependent Claim
16 words
A joint prosthesis as claimed in claim 8 characterized in that the synthetic resin is polyethene.
Claim 11
Dependent Claim
41 words
A joint prosthesis as claimed in claim 8 or 9 characterized in that the synthetic resin coating is fastened to the one prosthesis element and establishes a force fit with the fastening means at the level of the passages provided therein.
Claim 12
Dependent Claim
39 words
A joint prothesis as claimed in anyone of the preceding claims characterized in that the shape and size of the relative contact surfaces are the same for relatively different types of the one and the other prosthesis elements. 1
Claim 13
Dependent Claim
33 words
A joint prosthesis as claimed in anyone of the preceding claims characterized in that the one and the other prosthesis element can be releasably guarded in place with the aid of guard means.
Claim 14
Dependent Claim
104 words
A joint prothesis as claimed in anyone of the preceding claims characterized in that the joint prosthesis is a hip prosthesis, in which the prosthesis member to be arranged in the tigh bone is formed by the one prosthesis element formed by a sleeve with the passages, the inner shape of the sleeve substantially matching the external shape of the part of the ogher prosthesis element formed by a stem to be inserted into said sleeve, the other part formed by a head and connected with the stem corresponding with the second prosthesis member formed by a socket to be arranged in the pelvis.
Claim 15
Dependent Claim
20 words
A tool intended for driving out the fastening means of the one prosthesis element after the latter has been applied.
Claim 16
Dependent Claim
20 words
A tool intended for driving out the fastening means of the one prosthesis element after the latter has been applied.
References Cited (Backward Citations)
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