The Brigham and Women's Hospital, Inc.

Johnson & Johnson Professional, Inc.

Other

Depuy Products, Inc.

Johnson & Johnson Orthopaedics, Inc.

Thomas S Thornhill

Anuj Bellare

Richard D Scott

Wolfgang Fitz

Andreas H Gomoll

John E Slamin

Thomas S Camino

Salvatore Caldarise

Jorge A Ochoa

Marc Weissman

Thomas P Schmalzried

Erik S Larson

J Brock VanMeter, Jr

Daniel J Berry

William H Kennefick

Michael B Martyn

John Callaghan

David Fisher

Highly crystalline, oxidation resistant crosslinked polymeric materials such as crosslinked ultrahigh molecular weight polyethylenes having high wear resistance, enhanced stiffness, enhanced tensile strength, a high level of fatigue and crack propagation resistance, and enhanced creep resistance can be manufactured by the new methods described herein.

Crosslinked polymers

Nanocomposite surgical materials, such as cements, having very fine heterogenous structure are formed by incorporating into a polymeric matrix a well dispersed solid filler having an average mass diameter ranging from about 750 nanometers to about 1 nanometer. The average ligament thickness of the surgical composite cements ranges from about 750 nanometers to about 1 nanometer. Methods and apparatus for avoiding air contact during the preparation and transfer of a cement to an in vivo site are described.

Nanocomposite surgical materials and method of producing them

A articulating hemiarthroplasty prosthesis () for use in arthroplasty is provided. The prosthesis includes a stem () for implantation at least partially within the medullary canal () of a long bone () and a collar (). The collar () is operably associated with the stem () and extends outwardly therefrom. At least a portion of the collar () includes a resorbable material. The prosthesis includes a head () and a cup () for engagement with the head ().

Prosthesis with resorbable collar

Nanocomposite surgical materials, such as cements, having very fine heterogenous structure are formed by incorporating into a polymeric matrix a well dispersed solid, liquid or gaseous filler having an average mass diameter ranging from about 750 nanometers to about 1 nanometer. The average ligament thickness of the surgical composite cements ranges from about 750 nanometers to about 1 nanometer. Methods and apparatus for avoiding air contact during the preparation and transfer of a cement to an in vivo site are described.

A bone allograft applicator device and system is effective to apply a bone graft slurry to an artificial joint without having to remove a previously implanted prosthetic component. In one embodiment, the device includes a hollow member coupled to an actuation mechanism for discharging the bone slurry from the device via a nozzle coupled to a distal end of the hollow member. The device can be used to discharge bone graft slurry from the nozzle and through a screw hole in an acetabular component implanted in the acetabulum of a patient. A bone allograft system can include various components for loading the device with the slurry and/or a plurality of nozzles each having a geometry suited for a particular application.

Morsellized bone allograft applicator device

An improved knee prosthesis disclosed that includes a patella for positioning in a trochlear groove formed by two condyles of a femoral component. The novel patella of the disclosure has an elliptical outer periphery and presents an articulating surface to the femoral component for sliding engagement with a trochlear groove formed between the condyles of the femoral component. A side opposite the articulating surface has extending therefrom three posts which enhance the attachment of the patella prosthesis to the patella bone. In one embodiment of the invention an undercut area which is cut into the bone contacting surface of the prosthesis presents an overhang or undercut to the bone in order to enhance cement fixation. The overhang is formed by an outer defining wall which is positioned at an angle to a bottom surface of the recessed overhang area of between 50.degree. and 75.degree..

Oval domed shaped patella prosthesis

Instrumentation useful in knee revision surgery uses the intramedullary canal as a mount for other instruments, such as cutting guides. A bearing sleeve is inserted into the intramedullary canal by a rod. The position of the rod within the sleeve and the canal is then fixed and a cutting guide is attached to the proximal end of the rod. The rod and sleeve connection prevents abandonment of the sleeve in the canal.

Intramedullary based instrument systems for total knee revision

An osteal prosthetic component of a prosthetic joint and a method of implanting an osteal prosthetic component in the medullary canal of a bone are disclosed. The osteal prosthetic component includes a stem for disposition within a medullary canal of a bone and a fluted wedge portion extending from the stem. The fluted wedge has wedge portions which define at least one flute between the wedge portions. An interference fit is formed between the wedge portions and the bone during implantation of the stem into the medullary canal. Movement of the osteal prosthetic component relative to the bone is thereby sufficiently limited to allow tissue growth into a tissue-ingrowth portion at the surface of the stem to substantially prevent micromotion of the stem relative to the bone.

Growing community of inventors

Dover, MA, United States of America

Thomas S Thornhill