A device, for example a medical implant, and a method of making the same, the device having a metal or metal alloy substrate, for example cobalt chrome, and a diffusion hardened metallic surface, for example a plasma carburized surface, contacting a non-diffusion hardened surface or a diffusion hardened surface having a diffusion hardening species different from that of the opposing surface.

The invention relates to a revision prosthesis shaft of a revision joint endoprosthesis for anchoring in an elongate bone (9), in particular femur. The surface is designed for adhesive agent-free fastening in the proximal epimetaphysis (91) and the diaphysis (92) of the bone. According to the invention, a distal epimetaphyseal extension (2) is provided at the far end of the shaft (12), the tip of which extension reaches into the distal epimetaphysis (93) of the bone. The extension (2) is designed for fastening in the distal epimetaphysis (93) by means of an adhesive agent (3), in particular bone cement. The invention combines the advantages of cement-free fastening, namely of the shaft in itself in the diaphysis (92), with the advantages of cemented fastening, namely of the extension in the distal epimetaphysis (93). Even in difficult cases in which sufficient hold previously could not be achieved for lack of fastening distance in the diaphysis, stable anchoring can thus be achieved. This increases the safety and longevity of the revision. The invention further relates to a corresponding implantation method.

An orthopedic assembly includes a tibial prosthesis that includes a body that defines an anterior side and a posterior side. The body further includes a recess in the anterior side of the joint prosthesis and a plurality of openings that extend through the body from the anterior side to the posterior side thereof. At least a first and second opening of the openings are positioned at respective lateral and medial sides of a longitudinal axis of the tibial prosthesis. A modular insert is positioned within the recess of the body such that at least a portion of the modular insert is positioned between the openings of the body. The modular insert is formed separately from the tibial prosthesis and has a porous outer surface to promote tissue ingrowth.

An implant or endoprosthesis suitable to be implanted in human or animal tissue includes two (or more than two) parts to be joined in situ. Each one of the parts includes a joining location, the two joining locations facing each other when the device parts are positioned for being joined together, wherein one of the joining locations includes a material which is liquefiable by mechanical vibration and the other one of the joining locations includes a material which is not liquefiable by mechanical vibration and a structure (e.g. undercut cavities or protrusions) suitable for forming a positive fit connection with the liquefiable material. The joining process is effected by pressing the two device parts against each other and by applying ultrasonic vibration to one of the device parts when the two parts are positioned relative to each other such that the two joining locations are in contact with each other.

An orthopaedic implant includes: an implant body including a biocompatible material and configured to be implanted at an anatomical location, the implant body defining an attachment region on an outer surface of the implant body; an adjustable holder attached to the implant body and having a compression surface facing the attachment region, the adjustable holder being configured to be implanted at the anatomical location with the implant body and adjustably compress a soft tissue and/or a graft material between the compression surface and the attachment region; and a ratcheting mechanism attached to the implant body and configured to apply tension to the soft tissue and/or the graft material connected to the ratcheting mechanism.

SIT0018.DIV2 1

A device, for example a medical implant, and a method of making the same, the device having a metal or metal alloy substrate, for example cobalt chrome, and a diffusion hardened metallic surface, for example a plasma carburized surface, contacting a non-diffusion hardened surface or a diffusion hardened surface having a diffusion hardening species different from that of the opposing surface.

An orthopedic assembly includes a tibial prosthesis that includes a body that defines an anterior side and a posterior side. The body further incudes a recess in the anterior side of the joint prosthesis and a plurality of openings that extend through the body from the anterior side to the posterior side thereof. At least a first and second opening of the openings are positioned at respective lateral and medial sides of a longitudinal axis of the tibial prosthesis. A modular insert is positioned within the recess of the body such that at least a portion of the modular insert is positioned between the openings of the body. The modular insert is formed separately from the tibial prosthesis and has a porous outer surface to promote tissue ingrowth.

An orthopedic implant has an implant body defining a longitudinal axis extending in a direction of implantation of the orthopedic implant, the implant body having a first end portion and a second end portion. A porous structure extends circumferentially around the implant body and has a first circumferentially-extending zone exhibiting a first coefficient of friction with bone tissue and a second circumferentially-extending zone exhibiting a second coefficient of friction with bone tissue, wherein the second coefficient of friction is greater than the first coefficient of friction. The first circumferentially-extending zone of the porous structure is offset from the second circumferentially-extending zone along the longitudinal axis such that during implantation of the orthopedic implant, the first circumferentially-extending zone of the porous structure contacts bone before the second circumferentially-extending zone of the porous structure.

An implant or endoprosthesis suitable to be implanted in human or animal tissue includes two (or more than two) parts to be joined in situ. Each one of the parts includes a joining location, the two joining locations facing each other when the device parts are positioned for being joined together, wherein one of the joining locations includes a material which is liquefiable by mechanical vibration and the other one of the joining locations includes a material which is not liquefiable by mechanical vibration and a structure (e.g. undercut cavities or protrusions) suitable for forming a positive fit connection with the liquefiable material. The joining process is effected by pressing the two device parts against each other and by applying ultrasonic vibration to one of the device parts when the two parts are positioned relative to each other such that the two joining locations are in contact with each other.

An implantable prosthesis including a stem and a stem head. The stem extends along a longitudinal axis from a proximal end portion to a distal end portion of the stem. The stem head is coupled to the proximal end portion of the stem. The stem head is configured to be coupled to a joint component. The stem head includes a side surface and a side surface cleat. The side surface cleat defines a first side surface groove and a second side surface groove. The side surface cleat extends between the first side surface and the second side surface.