Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1993-06-17
1995-04-11
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 16, 623 22, 623 23, 623 20, A61F 230
Patent
active
054053943
ABSTRACT:
The invention provides an interpositional coupler for inserting between modules of a modular medical implant, wherein the modules are fabricated of compositions having different electrochemical potentials, to reduce or prevent the flow of a galvanic current and thereby reducing or preventing this contribution to corrosion of the prosthesis. The coupler may be of an insulative type comprising a zirconium/zirconium alloy core coated with blue-black zirconium oxide or nitride or any metal coated with amorphous diamond-like carbon. Alternatively, the coupler may be of a dual composition type with each of the compositions having essentially the same electrochemical potential as the module to which it couples.
REFERENCES:
patent: 3707006 (1972-12-01), Bokros et al.
patent: 4032994 (1977-07-01), Frey
patent: 4058856 (1987-11-01), Doerre et al.
patent: 4227265 (1980-10-01), Frey
patent: 4687488 (1987-08-01), Frey
patent: 4921500 (1990-05-01), Averill et al.
patent: 4950298 (1990-08-01), Gustilo et al.
patent: 5047058 (1991-09-01), Roberts et al.
patent: 5080679 (1992-01-01), Pratt et al.
Dewert Abstract of EPO 0 011 665 (in English) "Ceramic Endoprosthesis Hip Knee Joint Taper Sleeve Join Shank Neck Length Adjust" by Mittelmeie, H et al.; Jun. 11 1980.
Derwert Abstract of French 2 310 120 (in English) "Aluminum Ball Couple Insert Joint Metal Oxide Prosthesis Shaft Socket Titanium" by Ceraver, SA; Jan. 7 1977.
Isabella David
Smith & Nephew Richards Inc.
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