Francis W Cooke

US Patent:

51083981, Apr 28, 1992

Filed:

Oct 16, 1990

Appl. No.:

7/598920

Inventors:

David A. McQueen - Wichita KS
Francis W. Cooke - Wichita KS
Dustan L. Hahn - Derby KS

Assignee:

Orthopaedic Research Institute - Wichita KS

International Classification:

A61B 1758

US Classification:

606 62

Abstract:

An orthopaedic surgical implant apparatus includes an elongated intramedullary rod assembly 10 for use in uniting a pair of bone segments wherein each of the bone segments includes a medullary cavity. The elongated intramedullary rod assembly 10 defines a central longitudinal axis when assembled and includes first and second points of attachment 26, 48, the rod assembly 10 being adapted to be positioned within the medullary cavities of the bone segments and secured to the first bond segment at the first point of attachment 26 and to the second bone segment at the second point of attachment 48. Structure 18, 52 is provided for shortening the predetermined distance between the first and second points of attachment 26, 48 of the rod assembly in the direction of the longitudinal axis after the rod assembly has been connected to the first and second bone segments so that the first and second bone segments are brought into contact with and press against one another. A method of implanting the apparatus is also disclosed.

US Patent:

53366999, Aug 9, 1994

Filed:

Dec 28, 1992

Appl. No.:

7/998881

Inventors:

Francis W. Cooke - Wichita KS
Thomas R. Marrero - Columbia, MO
Hirotsuga K. Yasuda - Columbia, MO

Assignee:

Orthopaedic Research Institute - Wichita KS

International Classification:

A61F 200

US Classification:

523115

Abstract:

Improved polymeric orthopaedic compositions are disclosed wherein sized, functional fibers are incorporated into a physiologically acceptable matrix. The compositions of the invention can be fabricated in the form of particulate powders adapted for reinforcment of bone cements, continuous media for such cements, and orthopaedic implant coatings. A complete implant attachment system is also provided, made up of a fiber reinforced implant coating, and a compatible fiber-reinforced cement. In preferred forms, the fibers have a layer of sizing thereover which is chemically joined both to the surface of the fibers and to the surrounding matrix, and the fibers are present at a level of at least about 6 volume percent. If desired, sized radiopaque particles may be incorporated into the compositions of the invention. The fibers are advantageously polymeric in nature and of intermediate stiffness, whereas the matrix fraction is preferably polymethylmethacrylate.

US Patent:

54768802, Dec 19, 1995

Filed:

Jul 28, 1994

Appl. No.:

8/281831

Inventors:

Francis W. Cooke - Wichita KS
Thomas R. Marrero - Columbia MO
Hirotsuga K. Yasuda - Columbia MO

Assignee:

Orthopaedic Research Institute, Inc., of Wichita - Wichita KS
Curators of University of Missouri - Columbia MO

International Classification:

A61F 200
A61F 504
A61F 228
A61B 1756

US Classification:

523115

Abstract:

Improved polymeric orthopaedic compositions are disclosed wherein sized, functional fibers are incorporated into a physiologically acceptable matrix. The compositions of the invention can be fabricated in the form of particulate powders adapted for reinforcment of bone cements, continuous media for such cements, and orthopaedic implant coatings. A complete implant attachment system is also provided, made up of a fiber reinforced implant coating, and a compatible fiber-reinforced cement. In preferred forms, the fibers have a layer of sizing thereover which is chemically joined both to the surface of the fibers and to the surrounding matrix, and the fibers are present at a level of at least about 6 volume percent. If desired, sized radiopaque particles may be incorporated into the compositions of the invention. The fibers are advantageously polymeric in nature and of intermediate stiffness, whereas the matrix fraction is preferably polymethylmethacrylate.