Patent US3292754A successfully refreshed from Google Patents.
EP0454645A1
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Artificial joint mechanism
Assignee: Medevelop AB
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Filing: 1991-04-23
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Granted: —
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Expires: 2011-04-23
Abstract
Abstract An artificial joint mechanism (1) with a flexible mid-section and which, by means of connecting members or pins (2) cooperates with anchoring members arranged in the bone tissue. At least the mid-section of the joint mechanism is provided with suitable reinforcements (3) in the form of fibers, strips, layer, etc. of a suitable flexible, resilient material to optimally impart normal joint function, partly in order to guarantee the ablity of the artificial joint to withstand repeated bending stress and partly to provide the artificial joint with a necessarily limited pivotability. The reinforcement has various configurations and are either inside or outside the mid-section and usually extending along the body toward the end pins. <IMAGE>
Inventors
- 👤 Per-Ingvar Branemark
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 08:21
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/02; A61L27/04; A61L27/06; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/3094; A61F2/30965; A61F2/42; A61L27/14; A61L27/18; A61F2/32; A61F2/38; A61F2/3804; A61F2/4202; A61F2/4225; A61F2/4241; A61F2/4261; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30289; A61F2002/30291; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2002/30565; A61F2002/30566; A61F2002/30573; A61F2/30767; A61F2/30771; A61F2002/30878; A61F2/30907; A61F2002/30919; A61F2230/00; A61F2230/0063; A61F2230/0091; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61L2430/00; A61L2430/24
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
64 words
An artificial joint mechanism for replacing a natural joint and comprising a joint body (1) which includes a flexible mid-section, connecting means (2) for connecting said joint body (1) to bone tissue, and reinforcement means (3) in at least said flexible mid-section for optimizing flexibility of said mid-section in the main bending direction of the joint mechanism and/or the pivotability of the joint mechanism.
Claim 2
Dependent Claim
41 words
The artificial joint mechanism of claim 1, wherein said connecting means (2) comprises a pair of pins connected to said flexible mid-section and protruding therefrom for cooperation with anchoring members implanted in the bone tissue on each side of the joint.
Claim 3
Dependent Claim
43 words
The artificial joint mechanism of claim 1, wherein said reinforcement means (3) is shaped and comprised of a material for resiliently maintaining said joint body (1) in its original shape following repeated deformations of said joint body (1) in its main bending direction.
Claim 4
Dependent Claim
16 words
The artificial joint mechanism of claim 1, wherein said mid-section is comprised of an elastomeric material.
Claim 5
Dependent Claim
21 words
The artificial joint mechanism of claim 4, wherein said mid-section is comprised of a thermoplastic containing di-phenyl-sulphone groups of the type
Claim 6
Dependent Claim
27 words
The artificial joint mechanism of claim 5, wherein said mid-section has an ability to return to its original form of at least 80% after repeated, varying deformations.
Claim 7
Dependent Claim
27 words
The artificial joint mechanism of claim 4, wherein said mid-section has an ability to return to its original form of at least 80% after repeated, varying deformations.
Claim 8
Dependent Claim
54 words
The artificial joint mechanism of claim 5, wherein said mid-section is comprised of a polymeric material having a tensile strength of between 50 and 90 N/mm², a modulus of elasticity of between 2000 and 2600 N/mm² and a notch impact strength of between 40 and 80 J/n (with a material thickness of 2.8-15.0 mm).
Claim 9
Dependent Claim
54 words
The artificial joint mechanism of claim 4, wherein said mid-section is comprised of a polymeric material having a tensile strength of between 50 and 90 N/mm², a modulus of elasticity of between 2000 and 2600 N/mm² and a notch impact strength of between 40 and 80 J/n (with a material thickness of 2.8-15.0 mm).
Claim 10
Dependent Claim
54 words
The artificial joint mechanism of claim 3, wherein said mid-section is comprised of a polymeric material having a tensile strength of between 50 and 90 N/mm², a modulus of elasticity of between 2000 and 2600 N/mm² and a notch impact strength of between 40 and 80 J/n (with a material thickness of 2.8-15.0 mm).
Claim 11
Dependent Claim
56 words
The artificial joint mechanism of claim 2, wherein said mid-section and pins are comprised of a polymeric material having a tensile strength of between 50 and 90 N/mm², a modulus of elasticity of between 2000 and 2600 N/mm² and a notch impact strength of between 40 and 80 J/n (with a material thickness of 2.8-15.0 mm).
Claim 12
Dependent Claim
35 words
The artificial joint mechanism of claim 1, wherein said reinforcement means (3) comprises at least one fiber embedded in and extending longitudinally along said mid-section and extending along a direction of movement of said mid-section.
Claim 13
Dependent Claim
56 words
The artificial joint mechanism of claim 1, wherein said reinforcement means (3) comprises at least one reinforcement element extending along said joint body (1) selected from the group consisting of titanium threads, carbon fibers, polymer fibers, cable-like twisted fibers, plastic or metal mesh, woven inserts comprising biocompatible material, and thin strips or plates comprising biocompatible material.
Claim 14
Dependent Claim
58 words
The artificial joint mechanism of claim 1, wherein said reinforcement means (3) comprises a plurality of layers of a reinforcement element selected from the group consisting of prefabricated strips, plates and net-like inserts, whereing said layers are substantially parallel to and spaced from each other wherein said layers extend through said mid-section and into said connecting means (2).
Claim 15
Dependent Claim
35 words
The artificial joint mechanism of claim 14, wherein said connecting means (3) are narrower in cross section than said mid-section and wherein said layers are narrower in said connecting means (3) than in said mid-section.
Claim 16
Dependent Claim
26 words
The artificial joint mechanism of claim 1, wherein said reinforcement means (3) includes a reinforcement element transverse to a normal direction of movement for said joint.
Claim 17
Dependent Claim
25 words
The artificial joint mechanism of claim 1, wherein said means includes a reinforcement means (3) which spreads in three dimensions in said joint body (1).
Claim 18
Dependent Claim
19 words
The artificial joint mechanism of claim 1, wherein said reinforcement means (3) is a spiral coil surrounding said mid-section.
Claim 19
Dependent Claim
18 words
The artificial joint mechanism of claim 1, further comprising a sleeve-shaped outer casing surrounding at least said mid-section.
Claim 20
Dependent Claim
13 words
The artificial joint mechanism of claim 19, wherein said outer casing comprises titanium.
Claim 21
Dependent Claim
41 words
The artificial joint mechanism of claim 1, wherein said reinforcement means (3) comprises a plurality of reinforcing elements extending through said joint body (1) and at least one of said elements being in a plane diagonal to said joint body (1).
Claim 22
Dependent Claim
51 words
The artificial jont mechanism of claim 4, wherein said body is generally half spherical in shape with a flat side, and one of said connecting means (2) extending out of said flat side; said body having a rounded side and another of said connecting means (2) projecting from said rounded side.
Claim 23
Dependent Claim
51 words
The artificial joint mechanism of claim 1, wherein said body is generally half spherical in shape with a flat side, and one of said connecting means (2) extending out of said flat side; said body having a rounded side and another of said connecting means (2) projecting from said rounded side.
Claim 24
Dependent Claim
32 words
The artificial joint mechanism of claim 23, wherein said reinforcement means (3) comprises a helically coiled wire in said body and the helix of said coil extending toward said connecting means (2).
Claim 25
Dependent Claim
36 words
The artificial joint mechanism of claim 24, wherein said coil is wound wider in diamter toward said rounded side of said body and is wound gradually smaller in diameter toward said flat side of said body.
Claim 26
Dependent Claim
26 words
The artificial joint mechanism of claim 25, wherein said connecting means (2) at said flat side of said body is a pin integral with said coil.
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