An ankle arthroplasty system may have a talar prosthesis and a tibial prosthesis, each of which has an articular surface and a bone engagement surface. Each bone engagement surface may have an anterior-posterior curvature and a medial-lateral curvature with a convex shape. A burr with a rotatable cutting element may be used to form a prepared surface on the talus or the tibia to receive the corresponding prosthesis. A cutting guide may be used to guide motion of the burr; the cutting guide may include a base and an arm movably coupled to the base. One of the base and the arm may have a guide surface, and the other may have a follower that slides along the guide surface to constrain motion of the burr such that the prepared surface has at least one concave curvature and one convex curvature.

A method for forming a prosthesis comprising a bone-like portion and a cartilage-like portion can comprise additively manufacturing a first positive mold in accordance with a portion of a first three-dimensional model of a portion of a bone. A first negative mold can be formed from the first positive mold. The bone-like portion can be created within the first negative mold. A second positive mold of the bone and a cartilage can be additively manufactured from a second three-dimensional model. A portion of the second three-dimensional model can correspond to a portion of the first three-dimensional model. A second negative mold can be formed from the second positive mold. The bone-like portion can be positioned in the second negative mold so that the second negative mold and the bone-like portion can define a cartilage space that can be filled with a material to form the cartilage-like portion of the prosthesis.

The present invention relates to a crescent or tri-corner shaped orthopedic plate with at least a first and a second end, and generally coextensive top and bottom surfaces joined directly or indirectly by an edge. The plate includes a plurality of fixation holes the first end of the plate and a second end of the plate that receives locking screws and intermediate the two holes, the plate includes a recess that defines a screw hole edge at an angle relative to the top surface of the plate so as to receive and support a screw in the recess. The invention further relates to a method of fusion using the plate and a clamp designed for the method.

Various cannulated bone implants and methods of using the cannulated bone implant are disclosed. The cannulated bone implant can include a proximal portion, a proximal end, a distal portion, a distal end, a transition portion, a threaded portion, a finned portion and a central passage. The transition portion can comprise a bend positioned between the proximal portion and the distal portion. The threaded portion can be positioned along the proximal portion between the proximal end and the transition portion. The threaded portion can be configured to secure the implant into a bone of a patient. The finned portion can be positioned along the distal portion between the transition portion and the distal end. The finned portion can be configured to prevent migration and/or rotation of the implant in use. The central passage can extend linearly from the proximal end of the implant to the distal end of the implant.

A system includes a first spacer sized and configured to be received within a resected bone space of a first bone and a second spacer sized and configured to be coupled to a second bone. The first spacer and the second spacer each include a body extending between a bone contacting surface and a coupling surface. At least one shim is positioned between the first and second spacers. The shim includes a body extending between a first coupling surface and a second coupling surface. The first spacer, the second spacer, and the at least one shim position the first and second bones in a predetermined alignment. An adjustable guide including a guide adapter and a guide body is configured to couple to the first spacer and is adjustable on a first axis.

A wrist arthrodesis plate (20) consisting of a distal region (21) and of a proximal region (22) which adjoins the distal region (21) in the direction of a longitudinal axis (A). The plate (20) is of such a shape and size that the distal region (21) of the plate can be fastened to the carpus (1) and a proximal region (22) of the plate can be fastened to the radius (3) by fastening devices, such as screws, which can be inserted into plate holes. A distal end region (29), which comprises a farthest distal location (23) of the plate (20), is of a shape and size that the distal end region (29) can be placed with the farthest distal location (23) exactly, and only, on a carpal bone from the group comprising trapezium (11), trapezoid (10), capitate (9) and hamate (8), without covering any part of the laterally adjacent bones.

A wrist arthrodesis plate (20) consisting of a distal region (21) and of a proximal region (22) which adjoins the distal region (21) in the direction of a longitudinal axis (A). The plate (20) is of such a shape and size that the distal region (21) of the plate can be fastened to the carpus (1) and a proximal region (22) of the plate can be fastened to the radius (3) by fastening devices, such as screws, which can be inserted into plate holes. A distal end region (29), which comprises a farthest distal location (23) of the plate (20), is of a shape and size that the distal end region (29) can be placed with the farthest distal location (23) exactly, and only, on a carpal bone from the group comprising trapezium (11), trapezoid (10), capitate (9) and hamate (8), without covering any part of the laterally adjacent bones.

An implant having a joint facing surface and a bone facing surface forming a body member and a dorsal member therebetween. The implant further having a ring member extending out from the bone facing surface to a free end disposed for insertion into a bone recess. The body member and the dorsal member include a concave curvature on the bone facing surface and a convex curvature on the joint facing surface.

An implant having a unitary body includes an intramedullary portion and an extramedullary portion. The intramedullary portion is sized and structured to be received within an intramedullary canal of a first bone and defines a longitudinal axis. The extramedullary portion includes a surface defining an axis that is disposed at an angle with respect to the longitudinal axis. An aperture defined along the extramedullary portion is sized and configured to receive a fastener therein for coupling the extramedullary portion of the implant to a second bone.

Devices, systems, techniques and methods for determining the fit of an implant and for determining one or more prognosticators, indicators or risk factors of postoperative performance are provided.