Porous living body repairing member, and a method of imparting elasticity to it

• US 5,492,768 A
• Filed: 04/21/1995
• Issued: 02/20/1996
• Est. Priority Date: 10/08/1992
• Status: Expired due to Term

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Tamura, Yasunori, Okimatsu, Hideaki
• Primary Examiner(s): Walsh, Donald P.
• Assistant Examiner(s): Greaves, John N.
• Application Number:
  US08/426,035
• Time in Patent Office: 305 Days
• Field of Search: 428/549, 419/24, 623/16, 623/17, 623/18, 623/19, 623/20, 623/21, 623/22, 623/23
• US Class Current: 428/549
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/30907 Nets or sleeves applied to surface of prostheses or in cement
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2002/30263 cubical
• CPC Class Codes: A61F 2002/30968 Sintering
• CPC Class Codes: A61F 2230/0084 cubical
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61L 27/04 Metals or alloys
• CPC Class Codes: A61L 27/06 Titanium or titanium alloys
• CPC Class Codes: A61L 27/56 Porous materials, e.g. foams or sponges
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/146 Porous materials, e.g. foams or sponges
• CPC Class Codes: Y10T 428/12035 Fiber, asbestos, or cellulose in or next to particulate component

Abstract

A porous living body repairing member obtained by compression-molding a metal fiber material into a desired shape, sintering the fiber mesh body or thereafter, and imparting a compressive stress of not more than 4.00 to 40.0 MPa to provide a porous living body repairing member having a compressive elasticity of not more than 2000 MPa and a permanent deformation of not more than 1% under a stress below a compressive yield stress.

The compressive yield stress becomes approximately equal to the above compressive stress, and almost complete elasticity of a permanent deformation rate of not more than 0.1% is shown with respect to a compressive stress below this compressive yield stress. Accordingly, even when the porous living body repairing member is used at a high compressive load site such as man'"'"'s lumbar body, permanent deformation hardly occurs. Since the member of this invention has a compressive elasticity of not more than 2000 MPa, when it is transplanted within the living body, its stress to the bone is well transmitted, and it acts advantageously to the bone ingrowth in the pore. At the same time, bone absorption around the repairing member is not developed which may occur by the shielding off of the stress as is seen in a living body repairing member having a high elasticity.

Claims

1. A porous living body repairing member composed of a porous living body repairing member made of an fiber mesh body obtained by compression-molding a metal fiber material in a desired shape and having a compressive elasticity of not more than 2000 MPa and a permanent deformation of not more than 0.1% under a stress below a compressive yield stress.