Biomet UK Limited

British Technology Group Limited

Other

Btg International Limited

Biomet UK Healthcare Limited

Biomet, Inc.

Estate of John William Goodfellow

Colin Hunsley, Estate of John William Goodfellow

Oxford Analysis Ltd.

Murray, David Wycliffe

Oxford Joint Analysis Ltd

Hunsley, Colin

Dodd, Chris Alexander

O'connor, John

Colin Hunsley, Acting As Executor for the Estate of John William Goodfellow

John William Goodfellow

John Joseph O'Connor

David Wycliffe Murray

Christopher Dodd

Russell Lloyd

David R Wolfson

Mohammed Imran Khan

Chris Alexander Dodd

Mona Alinejad

David Murray

Duncan Andrew Ridley

Russell Llloyd

John O'Conner

Colin Hunsley

John O'connor

Christopher Alexander Dodd

John Joseph O'CONNOR

A system for a unicompartmental knee replacement is described. The system can include a femoral prosthesis component, a tibial prosthesis component and a meniscal bearing. The meniscal bearing can be insertable between the femoral prosthesis component and the tibial prosthesis component. The meniscal bearing can include a first bearing surface configured to bear against the femoral prosthesis component, a second bearing surface opposed to the first bearing surface and configured to bear against the tibial prosthesis component, and a sidewall separating the first bearing surface from the second bearing surface, wherein the sidewall has a retention groove formed in a portion thereof, and wherein the meniscal bearing and the tibial prosthesis component are configured such that the retaining flange enters the retention groove on movement of the meniscal bearing relative to the tibial prosthesis component towards the medial wall.

Femoral extension prosthetic component and tibial shelf prosthetic component for unicondylar meniscal bearing knee prosthesis and prosthesis including such component

A rotary mill is disclosed comprising a body portion () having a milling surface () and a central bore () extending along an axis of rotation () of the body portion (); and a guide portion () having a guide body () and a guide peg () extending from the guide body (), the guide peg () operable to be received in the central bore () of the body portion (), the guide body () having at least one alignment feature () which is the same as that of a prosthesis component. A method of implanting a unicondylar femoral component is also disclosed, the method comprising, a) reaming the femoral condylar surface to accept the unicondylar femoral component; b) drilling peg holes for affixing the unicondylar femoral component; c) affixing a guide portion of a rotary mill onto the prepared condylar surface using the drilled peg holes; d) reaming a portion of bone anterior to the affixed guide portion; e) removing the guide portion from the bone; and f) affixing a unicondylar femoral component to the prepared condylar surface.

Rotary mill

A bearing componentfor a joint replacement prosthesis comprises a first bearing element; a second bearing element, and a linking element, operatively connecting the first and second bearing elementsand permitting relative motion there between. The flexible linking elementprevents dislocation of mobile bearings in a total knee replacement prosthesis. The invention also relates to a bridging element which retains the linking elementwith some play, which acts as a ligament support, and which causes a deflection of the line of action of a ligament A joint replacement prosthesis is also disclosed comprising a biasing elementor a tensioning elementoperatively coupled to the artificial ligament. The biasing elementor tensioning elementmay be housed in the stem of a tibia tray

Prosthesis for simulating natural kinematics

A tibial knee joint prosthesis for attachment to a suitably prepared tibial bone, providing bearing portions in the lateral and medial compartments. The lateral and medial bearing surfaces of the component are inclined at different angles in the anterior to posterior direction of the knee, so that when mounted to the tibia, the lateral bearing surface of the prosthesis is higher than the medial bearing surface to the posterior side of the knee. In this way the lateral ligament is tightened progressively more than the medial ligament as the knee moves from extension to flexion, resulting in increased stability in the lateral compartment.

Tibial component

A kit of parts for use in unicondylar meniscal bearing knee replacement comprises a plurality of meniscal bearings, each meniscal bearing comprising a body defining a dished first bearing surface on one side thereof and a second surface on an opposing side of the body. Each meniscal bearing has an entrapment between 3.2 mm and 3.8 mm. Meniscal bearings and methods of performing unicondylar meniscal bearing replacements are also described.

Unicondylar meniscal bearing knee replacement

The invention concerns a tibial prosthetic component comprising a plate () for forming a tibial plateau of a tibia (), wherein a peripheral region of the plate () has a thickness of less than 3 mm. The invention also concerns a tibial prosthetic component having a keel of depth less than 9 mm. The invention also concerns a method of selecting a tibial prosthetic component comprising receiving measurements of at least one physical attribute of an individual into whom the tibial prosthetic component is to be implanted, selecting a thickness of a plate () and depth of keel of the tibial prosthetic component based on the measurements and providing a tibial prosthetic component comprising a plate () having the selected thickness and a keel having the selected depth. The invention may also comprise implanting a tibial prosthetic component selected in accordance with this method into an individual and a kit comprising a plurality of prosthetic components comprising plates having different thicknesses with keels of different depths.

Tibial prosthetic component for a partial or unicondylar bearing knee replacement, method of selecting such a tibial prosthetic component, method of implanting such a tibial prosthetic component and a kit for a surgeon

A kit of parts for use in unicondylar knee replacement of a patient having a femur and a tibia comprises a drill guide and an intramedullary rod, the intramedullary rod being sized to fit within the intramedullary canal of the femur of the patient. The drill guide is arranged so as to engage a distal end of the intramedullary rod to that which engages the patient's intramedullary canal, and is formed with a foot portion sized to fit between the patient's femur and tibia before any bone is removed from the femur or tibia. The drill guide provides a guide for drilling of at least one hole in the femur. A further kit of parts for use in unicondylar knee replacement of a patient having a femur and a tibia comprises a femoral component for implantation in the femur, the femoral component having a bearing surface having a radius of curvature, and a guide spoon. The guide spoon has a bowl-shaped portion with an internal radius of curvature the same as that of the bearing surface, and a handle portion extending from the bowl-shaped portion. Methods of performing unicondylar knee replacement are also described.

Unicondylar knee replacement

A femoral extension prosthetic component for use in a unicondylar meniscal bearing unicompartmental knee replacement is described. The femoral component comprises a securing element and a bearing surface, the securing element adapted to abut and be connected to a distal end of a femur bone, and the bearing surface adapted to abut a meniscal bearing. The femoral component includes an entrapment portion adapted to extend beyond the meniscal bearing. Tibial components and meniscal bearings are also described, as well as methods of using such components.

Femoral extension prosthetic component and tibial shelf prosthetic component for unicondylar meniscal bearing knee prosthesis and prosthesis including such a component

A bearing componentfor a joint replacement prosthesis comprises a first bearing element; a second bearing element, and a linking element, operatively connecting the first and second bearing elementsand permitting relative motion there between. The flexible linking elementprevents dislocation of mobile bearings in a total knee replacement prosthesis. The invention also relates to a bridging element which retains the linking elementwith some play, which acts as a ligament support, and which causes a deflection of the line of action of a ligament A joint replacement prosthesis is also disclosed comprising a biasing elementor a tensioning elementoperatively coupled to the artificial ligament. The biasing elementor tensioning elementmay be housed in the stem of a tibial tray

Prosthesis for stimulating natural kinematics

A stylus assembly () adapted to align a surgical tool with a bone, the stylus assembly () comprising: a mounting element (); a tool guide () adjustably mounted relative to the mounting element (); a stylus () adjustably mounted relative to the mounting element () and having a curved portion for engagement with a predetermined part of the bone; and a lockable retaining member () for simultaneously locking the surgical tool guide () and the stylus () to the mounting element ().

Stylus assembly

A drill guide comprising: a body comprising a hole extending therethrough for guiding a drill; and an alignment tool, the alignment tool being operable to connect the body to an intramedullary rod, such that the orientation of the body is fixable with respect to the intramedullary rod in an anteroposterior plane and in a transverse plane.

Growing community of inventors

Oxfordshire, United Kingdom

John William Goodfellow