Depuy Ireland Unlimited Co.

Depuy Ireland Unlimited Company, Loughbeg Industrial Estate

David Horne

Alec Paul Birkbeck

Thomas Maack

Richard Patnelli

Gary Moore

Graeme John Dutton

Ian J Flatters

Duncan G Young

James Anderson

Christopher Hunt

James Aaron Reed

Henry Prout

Jeffrey A McAnelly

Stephanie Prince

John Bohannon Mason

Duncan Temple

Marcus Agunloye

Jeffrey Mcanelly

An orthopaedic joint prosthesis assembly includes a head part of an orthopaedic joint prosthesis component and an alignment guide. The head part has a spherical bearing surface for articulation with a corresponding joint surface, and an assembly surface having a first bore formed in it for receiving a spigot on another part of the orthopaedic joint prosthesis. The bore has a first axis that extends perpendicular to the assembly surface. The alignment guide has an axial portion defining a second axis and an arm extending from the axial portion. The arm includes a distal portion which is configured to engage the assembly surface, with the axial portion being arranged to engage the bearing surface of the head part when the head part is mounted within the guide such that an impaction force applied along the second axis is directed along the first axis.

Alignment guide

Kits and methods for use in intraoperative trialling of hip prostheses to determine an appropriate length for the femoral neck component of a prosthetic hip joint, are described. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis kit comprises a first and a second broach. Each of the first and second broaches has a neck connection element comprising a projection extending from a proximal surface of the broach, each projection having a length. The projection on the first broach has a different length than the projection on the second broach. The kit also includes a trial femoral neck component having a neck connection element in the form of a recess in a distal surface. The recess is configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length.

Trial neck

A surgical rotational tool driver and method. The driver includes a driveline extending within a hollow shaft and a head part including connection features for connecting to a connection member of a surgical rotational tool. The connection features of the head part include a housing and a pair of jaw member each including jaws for receiving the connection member. Each jaw member is pivotally mounted for rotation between: a first position for receipt of the connection member and a second position for retaining the connection member. The connection features of the head part further include a locking mechanism including a pair of catches for engaging with a respective catch of each jaw member to lock the jaw members in the second position. The locking mechanism also includes a release member slideably moveable within the housing to release the catches of the locking mechanism from the catches of the jaw members.

Surgical rotational tool driver and method

An acetabular reamer handle including a shaft having a distal end, a neck part having a longitudinal axis, a driveline extending through the shaft and the neck part, and a locking mechanism. A distally located head part of the driveline is mounted for rotation about the longitudinal axis of the neck part and is connectable to a reamer. The distal end of the shaft and a proximal end of the neck part are pivotally attached to allow the shaft to be tilted relative to the longitudinal axis. The tilting can allow part of the acetabulum and/or reamer that is otherwise obscured to be viewed. The locking mechanism includes an engagement member having an engagement surface located at the distal end of the shaft. The engagement member is moveable distally to urge the engagement surface against the proximal end of the neck part.

Acetabular reamer handle and method of reaming an acetabulum

Kits and methods for use in intraoperative trailing of hip prostheses to determine an appropriate length for the femoral neck component of a prosthetic hip joint, are described. A kit for use in selecting a femoral neck component of an orthopaedic joint prosthesis kit comprises a first () and a second () broach. Each of the first and second broaches has a neck connection element comprising a projection () extending from a proximal surface () of the broach, each projection having a length (L). The projection on the first broach has a different length than the projection on the second broach. The kit also includes a trial femoral neck () component having a neck connection element in the form of a recess () in a distal surface (). The recess is configured to mate with the projection on each of the first or second broaches such that mating of the trial femoral neck component with the first broach provides an assembly with a first neck length, and the mating of the trial femoral neck component with the second broach provides an assembly with a second neck length.

The invention provides a reamer handle comprising: a shank having a distal tool coupling end adapted to releasably couple to a part of a surgical tool and a proximal end; a retractable catch which is linearly displaceable along the shank between a non-retracted position in which the catch captures the surgical tool within the distal tool coupling end of the tool holder and a retracted position in which the catch enables the tool to be released from the distal tool coupling end; a biasing member configured to bias the catch in the non-retracted position; and a sleeve extending along the shank. The sleeve comprises: a distally located catch contacting portion and a proximally located handle portion for manually displacing the sleeve relative to the shank such that displacement of the catch contacting portion moves the retractable catch between the non-retracted position and the retracted position to enable capture and release of the tool from the tool holder.

Surgical tool release mechanism

A surgical rotational cutting tool, a surgical kit and a method of preparing a femur to receive a stem of a femoral prosthetic. The tool includes a longitudinal axis and a shaft extending along the longitudinal axis, which has a proximal end and a distal end. The tool also includes a head located at the distal end of the shaft. The head includes a pointed distal tip, a bone contacting outer surface having a portion which curves inwards toward the longitudinal axis as it approaches the tip, and a plurality of flutes. The edges of distal parts of neighboring pairs of the flutes meet to define a plurality of cutting edges which extend proximally from the pointed distal tip. A proximal part of each flute extends proximally across the curved portion.

Surgical rotational cutting tool and method

An orthopaedic joint prosthesis assembly includes a head part of an orthopaedic joint prosthesis component and an alignment guide. The head part has a spherical hearing surface for articulation with a corresponding joint surface, and an assembly surface having a first bore formed in it for receiving a spigot on another part of the orthopaedic joint prosthesis. The bore has a first axis that extends perpendicular to the assembly surface. The alignment guide has an axial portion defining a second axis and an arm extending from the axial portion. The arm includes a distal portion which is configured to engage the assembly surface, with the axial portion being arranged to engage the bearing surface of the head part when the head part is mounted within the guide such that an impaction force applied along the second axis is directed along the first axis.

The invention provides an impactor for transmitting an assembly force to a component of an orthopaedic implant. The impactor has first and second telescoping parts which are biased apart by means of a main spring. The main spring is compressed when an assembly force is applied to the parts. An indicator is latched against movement until it is released when the extent of the compression of the main spring by the application of an assembly force exceeds a threshold. The indicator then moves to provide the user with an indication that a minimum assembly force has been applied.

Impactor

The invention provides an osteotome which includes a curved guide member extending distally from its medial side. This curved guide member interfaces with the medial curvature of the femoral canal. The guide member guides the osteotome using the internal bone geometry of the femoral canal instead of relying on external anatomical landmarks.

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Leeds, United Kingdom

David Horne