Biomet UK Limited

British Technology Group Limited

Biomet UK Healthcare Limited

Other

Btg International Limited

Zimmer Gmbh

Biomet, Inc.

Bioment UK Healthcare Limited

Oxford Analysis Ltd.

Colin Hunsley, Estate of John William Goodfellow

Estate of John William Goodfellow

Dodd, Christopher Alexander

O'connor, John Joseph

Murray, David Wycliffe

Oxford Joint Analysis Ltd

John Joseph O'Connor

John William Goodfellow

David Wycliffe Murray

Christopher Dodd

Russell Lloyd

Mona Alinejad

Mohammed Imran Khan

David R Wolfson

Chris Alexander Dodd

Duncan Andrew Ridley

David Murray

Russell Llloyd

Mohammed Imran Kahn

Colin Hunsley

Christopher Paul Buckley

Junjie Wu

Christopher Alexander Dodd

Christopher Alexander Ferrier Dodd

Lloyd Russell

A ligament assembly comprising a first ligament anchor () connected to a second ligament anchor () by a ligament () a resilient element () being associated with the first ligament anchor () and a ligament tension adjuster () being associated with the second ligament anchor (). The resilient element () may be disposed within the first ligament anchor () and the ligament tension adjuster () may be disposed within the second ligament anchor ().

Ligament assembly

A rotary mill comprising a body portion having a milling surface for milling a first bone, a guide portion having a guide body, and inter-engageable guide formations formed on the body portion and guide portion, the guide body having a projection which is adapted to hold a second bone away from the rotary mill during the milling operation.

Rotary mill

A ligament assembly () comprising a resilient element () connected to a bone anchor () and a ligament (), the resilient element () acting m a cantilever and resisting toads transmitted between the bone anchor () and the ligament () by virtue of the resistance to bending of the resilient element. The ligament () may comprise an artificial ligament () which is adapted to replace a human or animal ligament. The resilient element () may comprise a spiral spring and may act as a biasing element/shock absorber operatively coupled to the artificial ligament () to control the effective stiffness of the artificial ligament (). Consequently, the resilient element () enables an effective stiffness of the artificial ligament () to be achieved that more closely approximates the stiffness of a natural ligament.

An artificial ligament is provided having an elongate body and two ends, with a loop being provided at least one of the ends and a loop liner being provided within the loop. A kit of artificial ligaments is also provided with each ligament in the kit having a different fixed length. Also provided are methods for determining a length of artificial ligament to be used within a prosthetic knee joint, selecting a ligament from a range or kit of ligaments, and implanting a prosthetic knee joint assembly comprising an artificial ligament.

Ligament fixing and a method of attaching a ligament

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.

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 prosthesis () comprising a bone attachment component () having one or more fixation structures (), wherein the prosthesis is configured to be selectively convertible between a mobile bearing prosthesis, in which a barrier () is secured to the bone attachment component () using the fixation structures, and a constrained bearing prosthesis, in which a bearing component () is secured to the bone attachment component () using the fixation structures ().

Prosthesis with fixed or mobile bearing

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 bearing for a total or partial joint replacement prosthesis: the bearing having a body and a reinforcing element which strengthens the bearing and which forms an attachment member, and/or the bearing being formed at least partially from polymeric or composite material the bearing comprising a lower modulus portion and a higher modulus portion, one portion of the bearing being at least partially encased by the other portion of the bearing. Also provided is a method for of forming the bearing, and a total or partial joint replacement prosthesis comprising the hearing.

Growing community of inventors

Oxford, United Kingdom

John Joseph O'Connor