Loci Orthopaedics Limited

National University of Ireland, Galway

Filip Stockmans

Arnold-Peter C Weiss

Amy L Ladd

Gerry Clarke

Brendan Boland

Mark Bruzzi

Fiona Mangan

A set of tools for installation of a stem implant into a bone comprises a stem-shaped priming tool () having a distal tip () and a plurality of cutting teeth () along a length thereof and a plurality of stem-shaped broaches () of different size. Each of the broaches have a distal tip () and a plurality of cutting teeth () along a length thereof. The priming tool () is shorter than, has more cutting teeth () per unit length, and has a sharper distal tip () than the smallest broach.

Set of tools for installing an implant

A hemi-arthroplasty bone joint implant has a first part () with a stem () tor intramedullary implanting into a metacarpal, and a second part () to engage the trapezium is a translational manner, a hemi-arthroplasty articulating coupling (). This allows multi-axial motion with translational movement of the second part over the trapezium and rotation of the first part () about the articulating coupling (). There is also a converter to convert the implant to a toral arthroplasty implant in situ during revision surgery. The second part () and the hemi-arthroplasty coupling () are removable in situ during revision surgery. The first part () has an engagement threaded socket () for, after removal of the second part and the hemi-arthroplasty coupling, engaging the replacement coupling () and allowing mutual articulation of the first () and replacement parts (). This forms a total arthroplasty joint implant.

Hemi arthroplasty joint implant

A hemi-arthroplasty bone joint implant has a first part () with a stem () tor intramedullary implanting into a metacarpal, mid a second part () to engage the trapezium is a translational manner, a hemi-arthroplasty articulating coupling (). This allows multi-axial motion with translational movement of the second part over the trapezium and rotation of the first part () about the articulating coupling (). There is also a converter to convert the implant to a total arthroplasty implant in situ during revision surgery. The second part () and the hemi-arthroplasty coupling () are removable in situ during revision surgery. The first part () has an engagement threaded socket () for, after removal of the second part and the hemi-arthroplasty coupling, engaging the replacement coupling () and allowing mutual articulation of the first () and replacement parts (). This forms a total arthroplasty joint implant.

A set of tools for installation of a stem implant into a bone comprises a stem-shaped priming tool () having a distal tip () and a plurality of cutting teeth () along a length thereof and a plurality of stem-shaped broaches () of different size. Each of the broaches have a distal tip and a plurality of cutting teeth along a length thereof. The priming tool () is shorter than, has more cutting teeth () per unit length, and has a sharper distal tip () than the smallest broach.

An implant () for a mammalian bone joint () for spacing a first bone () of the joint from a second bone () of the joint while allowing translational movement of the second bone in relation to the first bone is described. The implant comprises (a) a distal part () configured for intramedullary engagement with an end of the second bone, (b) a proximal part () having a platform () configured for non-engaging abutment of an end of the first bone and translational movement thereon, and (c) an articulating coupling () provided between the distal and proximal ends allowing controlled articulation of the first and second bones. The bone-abutting platform is shaped to conform to and translate upon the end of the first bone. A kit for assembly to form the implant of the invention, and the use of the implant to treat osteoarthritis in a bone joint, are also described.

Implant for a bone joint

Bone joint implants are described herein. The bone joint implants may comprise a metallic proximal platform configured for translational motion on the trapezium bone; a distal stem configured for intramedullary engagement with an end of the first metacarpal bone; an articulating coupling between the proximal platform and distal stem; and a proximal non-metallic wear surface and a distal non-metallic wear surface.

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Heule Kortrijk, Belgium

Filip Stockmans