EP0505634A1
Expired / Lapsed
EP
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A prosthesis
Assignee: BIOMATERIAL UNIVERSE KK
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Filing: 1991-04-26
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Granted: —
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Expires: 2011-04-26
Abstract
Abstract A prosthesis used for a damaged bone, an artificial articular cartilage or an artificial intervertebral disc being characterized in that the prosthesis is a composite body comprising polyvinyl alcohol hydrogel and ceramic or metallic porous body. With this prosthesis, PVA hydrogel enhances lubrication and shock absorbing functions, and the porous body allows the ingrowth and ossification of the bone tissue of a living body therein to affinitively connect said hydrogel to the bones of the living body.
Inventors
- 👤 Masanori Oka
- 👤 Shokyu Gen
- 👤 Yoshito Ikada
- 👤 Hideaki c/o Kyocera Corp. Okimatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 23:00
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/30756; A61F2/32; A61F2/36; A61F2/3601; A61F2/3603; A61F2/44; A61F2/442; A61L; A61L27/00; A61L27/14; A61L27/16; A61L27/50; A61L27/52; A61F2/3094; A61F2/30965; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30113; A61F2002/30125; A61F2002/30133; A61F2002/30138; A61F2002/30153; A61F2002/30154; A61F2002/30156; A61F2002/30199; A61F2002/30224; A61F2002/30261; A61F2002/30263; A61F2002/3028; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2002/30667; A61F2002/30673; A61F2/30767; A61F2/30907; A61F2002/30909; A61F2002/30915; A61F2002/30971; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0008; A61F2230/0015; A61F2230/0017; A61F2230/0019; A61F2230/0021; A61F2230/0023; A61F2230/0063; A61F2230/0069; A61F2230/0082; A61F2230/0084; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00179; A61F2310/00185; A61F2310/00203
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A prosthesis used for a damaged bone, an artificial articular cartilage or an artificial intervertebral disc being characterized in that said prosthesis comprises polyvinyl alcohol hydrogel and a ceramic or metallic porous body, wherein said hydrogel is carried by said porous body via infiltration and fixation in said porous body or formed independently and positioned at the dynamic interface between the bones of a living body, and said porous body is brought into contact with the bones so that said porous body allows the ingrowth and ossification of bone tissue therein to connect said hydrogel to the bones of the living body.
Claim 2
Dependent Claim
27 words
An artificial articular cartilage according to claim 1, wherein said polyvinyl alcohol hydrogel is carried via infiltration and fixation in said ceramic porous body or metallic mesh.
Claim 3
Dependent Claim
30 words
An artificial articular cartilage according to claim 2, wherein said polyvinyl alcohol has a polymerization rate of 1700 or more and a saponification rate of 99.5 mol % or more.
Claim 4
Dependent Claim
24 words
An artificial articular cartilage according to claim 2, wherein said polyvinyl alcohol hydrogel has a water content rate of 10 to 60 weight %.
Claim 5
Dependent Claim
15 words
An artificial articular cartilage according to claim 2, wherein said metallic mesh is titanium mesh.
Claim 6
Dependent Claim
21 words
An artificial articular cartilage according to claim 2, wherein said alumina ceramic porous body has a porosity of 20 to 80%.
Claim 7
Independent Claim
42 words
A method of producing an artificial articular cartilage being characterized in that said method comprises infiltrating a PVA solution in part or most of an alumina ceramic porous body or metallic mesh and setting said solution to gel at a low temperature.
Claim 8
Dependent Claim
42 words
A method of producing an artificial articular cartilage according to claim 7, wherein said method further comprises drying said PVA hydrogel carried via fixation in said alumina ceramic porous body or metallic mesh and heat-treating it at 120 to 180 o C.
Claim 9
Dependent Claim
27 words
An artificial intervertebral disc according to claim 1, which comprises a pair of metallic or ceramic porous bodies and a polyvinyl alcohol hydrogel block integrally incorporated therebetween.
Claim 10
Dependent Claim
29 words
An artificial intervertebral disc according to claim 9, wherein polyvinyl alcohol hydrogel is carried by said metallic or ceramic porous body contacting said hydrogel block via infiltration and fixation.
References Cited (Backward Citations)
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