Howmedica Osteonics Corporation

Inframat Corporation

Benoist Girard Sas

The University of Liverpool

Aiguo Wang

Daniel E Lawrynowicz

Aaron Essner

Shi-Shen Yau

Zongtao Zhang

John H Dumbleton

Nicholas Nai Guang Dong

Matthew P Poggie

Eric Jones

Shulin He

Haitong Zeng

Keenan Michael Hanson

Alfred J Zarnowski

Jay Krajewski

Damon J Servidio

Christopher John Sutcliffe

Casper F Stark

Robert W Klein

Thomas Francis McCarthy

Chau Ngo

Peter Tulkis

Gregory Plaskon

Naomi Murray

Balaji Prabhu

Ruey Lin

Robert Ledger

Thomas Francis Mccarthy

The tibial implant includes an integral baseplate, keel and four spikes. Each of the spikes include a non-tapering section and a tapering section, four free ends and four fillets. The spikes are specifically spaced about the baseplate and include porous outer surfaces adjacent to the baseplate.

Partially porous tibial component

A method for removing a stem portion of an orthopedic implant from a bone comprises exposing an implanted orthopedic implant having a body portion, a stem portion interconnected to the body and a porous metal section forming an interconnection between the body and the stem portion. A cutting tool is mounted on a holder connected to an exposed surface of the orthopedic implant. The porous section is aligned with the cutting tool mounted on the holder. The entire porous section is cut by moving the cutting tool therethrough in a direction transverse to the stem portion axis. The implant body portion is then removed and then the stem portion is removed from the bone. The cutting tool may be a saw or chisel which may be mounted on a guide fixed to the body portion.

Method of manufacturing a tibial implant

An orthopedic prosthetic joint comprising a joint couple having a first bearing surface made of a poly aryl ether ketone (PAEK) and a second joint component having a second bearing made of a polymer that is softer than the PAEK such as UHMWPE the first and second bearing surfaces in sliding engagement with one another.

Orthopedic PAEK-on-polymer bearings

Porous tibial implant

Partially porous bone implant keel

Orthopedic paek-on-polymer bearings

A method of fabricating a material having a high concentration of a carbide constituent. The method may comprise adding a carbide source to a biocompatible material in which a weight of the carbide source is at least approximately 10% of the total weight, heating the carbide source and the biocompatible material to a predetermined temperature to melt the biocompatible material and allow the carbide source to go into solution to form a molten homogeneous solution, and impinging the molten homogeneous solution with a high pressure fluid to form spray atomized powder having carbide particles. The size of a particle of carbide in the atomized powder may be approximately 900 nanometers or less. The biocompatible material may be cobalt chrome, the carbide source may be graphite, and the fluid may be a gas or a liquid.

Method for fabricating a biocompatible material having a high carbide phase and such material

A prosthetic head for a femoral component has a metal shell with a tapered cavity. The shell has a part-spherical outer surface defining an inner portion terminating in an open end. A polymeric material completely fills the inner portion of the hollow shell extending from an inner surface of the shell to the open end. The polymeric material includes a conically tapered socket centered about the polar axis intermediate ends of the open end wherein the shell is a hollow titanium shell having an inner surface with a porous structure for receiving a portion of the polymeric material. The hollow titanium shell inner surface has at least one rib extending inwardly toward the conically tapered socket.

Femoral prosthesis head

A method of producing an improved polyethylene, especially an ultra-high molecular weight polyethylene utilizes a sequential irradiation and annealing process to form a highly cross-linked polyethylene material. The use of sequential irradiation followed by sequential annealing after each irradiation allows each dose of irradiation in the series of doses to be relatively low while achieving a total dose which is sufficiently high to cross-link the material. The process may either be applied to a preformed material such as a rod or bar or sheet made from polyethylene resin or may be applied to a finished polyethylene part.

Sequentially cross-linked polyethylene

A method for coating an orthopedic implant made of a titanium or titanium alloy substrate with a cobalt-chrome molybdenum alloy uses multi-arc physical vapor deposition (MA-PVD). The substrate has a first bearing surface coated with a coating made of the deposited cobalt-chromium molybdenum alloy. The bearing surface slidably receives a second bearing surface of the prosthetic joint component. The MA-PVD cobalt-chromium molybdenum alloy coating forming the first bearing surface is made up of hexagonal close packed (HCP) grains having a columnar structure with a length of about 1 &#x3bc;m and a width of about 0.1 &#x3bc;m with the length of each HCP grains being oriented generally perpendicular to the titanium substrate bearing surface.

Cobalt chrome coated titanium implant

A method of manufacturing an orthopaedic implant device having a porous outer surface is described. In one embodiment, the implant device includes a porous layer, an intermediate layer, and a solid substrate. The porous layer is preferably bonded to the intermediate layer by cold isostatic pressing. The intermediate layer is preferably bonded by vacuum welding to the solid substrate such that the porous layer forms at least a portion of the outer surface of the orthopaedic implant device. Preferably, a diffusion bond is created between the bonded intermediate layer and the solid substrate by hot isostatic pressing. In another embodiment, a porous layer is created on an outer surface of a solid layer by selective melting. Preferably, the solid layer is bonded to the solid substrate such that the porous layer forms at least a portion of the outer surface of the orthopaedic implant device.

Methods for manufacturing porous orthopaedic implants

Growing community of inventors

Wayne, NJ, United States of America

Aiguo Wang