An implantable prosthetic hip system generally includes acetabular components, femoral components, and tooling for implanting the components. The acetabular components include an acetabular socket and a bushing received within the acetabular socket. The acetabular socket defines a reamer with cutters for preparing the acetabulum. The femoral components generally include a cutter cap, a head cover, and a screw. Tooling includes a cutting bit that is used to cut a flat on the femoral head. The cutter cap is advanced in a cutting action onto the femoral head to remove the sides of the head and the cutter cap is also implanted on the femoral head. The head cover is positioned on the cutter cap, and retained with a coupling screw. The acetabular socket and the head cover are assembled with a bushing therebetween. Methods of implantation are also provided.

A method of performing joint arthroplasty includes accessing a surface on a bone and supporting a stop with the accessed surface. The method includes positioning an instrument at least partially within the stop, the instrument having a body and a punch, the punch including a portion thereof having a shape similar to a shape of a stem of an implant, and rotating the stop with respect to the accessed surface based upon an indicia on one of the body and the stop so as to position the punch rotationally with respect to the accessed surface at a first orientation. The method further includes moving the body axially with respect to the stop to form a cavity in the bone with the punch at the first rotational orientation, the formed cavity having a shape similar to the stem of the implant, and implanting the stem of the implant into the cavity.

A total joint prosthesis that achieves non-invasive length modification and a method of using the same is provided. A gearbox housing within the implant contains a lengthening mechanism comprising a rotatable magnetic rod mechanically coupled to a lengthening screw through a series of parallel gear sets. The lengthening screw is coupled to an internally threaded implant neck. An external magnetic device containing at least one rotatable magnet produces a magnetic field. After total joint arthroplasty, the magnetic field of the external device forces rotation of the internal magnetic rod, causing rotation of the lengthening screw. Rotation of the lengthening screw causes the neck to either compress toward or extend away from the housing, adjusting the overall length of the implant and limb. This invention thus provides non-invasive means for post-operative limb-length modification after total joint arthroplasty and is useful in treating conditions such as limb-length discrepancy.

Intramedullary fixation device, having an intramedullary rod (2) which is provided for insertion thereof into a bone (1) and consists of a central screw (4) having a first free end comprising a stopper (7) and a second free end with a pre-tensioning nut (8), an alternating series of expanders (3) and bolts (5) being arranged in between, the bolt surfaces in contact with the expanders (3) having a wedge shape. The bolts (5) or expanders (3) may have no, or one or more variations in the dimensions of the different geometric parameters, in accordance with the adjacent expanders, along the length of the implant, and the central screw (4) may have a variable cross section. The device may have different additional components, such as an osteotomic base (9) for fixation of the musculature. The device promotes maximum nailing limited between these elements and produces a controlled peripheral radial deformation.

Provided is an implant receiving apparatus (10) comprising a core (20), the core defining a first end (30) and a second end (40), a wall (50) comprising inner surface (60) and outer surface (70) and a centerline (80) extending centrally of and between the ends (30, 40), the size and shape of the core (20) defining a socket or cavity (90) adapted to receiving an implant engaging member (100), wherein the wall comprises at least one threaded bore (110) for engaging a screw retainer, the bore traversing through the wall from the inner surface to the outer surface. Also provided is an implant engaging member, an implant system comprising both an implant engaging member and implant receiving apparatus as well as kits comprising an implant receiving apparatus.

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.

A surgical or arthroscopic method for resurfacing at least one surface of a hip joint of a human patient, using a medical device comprising an artificial hip joint surface, wherein the hip joint surface comprising an acetabulum surface and a caput femur surface, said method comprising the steps of: creating at least one hole passing into the hip joint, dissecting and preparing the hip joint, introducing at least one artificial hip joint surface, comprising at least one of an artificial acetabulum surface and an artificial caput femur surface, wherein said at least one artificial hip joint surface, comprising a first sealing member, creating a sealed hollow space between said first sealing member and one of the acetabulum surface or said artificial acetabulum surface and one of the caput femur surface or said artificial caput femur surface, selecting at least one artificial hip joint surface and injecting a material into said hollow space.

An implantable medical device for implantation in a hip joint is provided. The medical device comprises: at least one artificial hip joint surface adapted to replace at least the surface of at least one of the caput femur and acetabulum. At least one artificial hip joint surface comprises: a positioning hole with at least one opening in said at least one artificial hip joint surface. The hole is adapted to be placed and dimensioned such that the medical device is adapted to be fitted using a positioning shaft and at least partly surround the shaft, for positioning the at least one artificial hip joint surface in a desired position in the hip joint. The hole is adapted to be fitted using the positioning shaft, when the shaft is stabilized and placed in at least one of the femoral bone and the pelvic bone for positioning said medical device inside the hip joint.

A method of performing joint arthroplasty includes preparing a flat surface on a long bone, providing an instrument having a body and a punch extending from the body, the punch including a portion thereof having a shape similar to a stem of an implant, positioning a stop on the flat surface, rotating the stop with respect to the surface of the long bone based upon an indicia on one of the body and the stop so as to position the punch rotationally with respect to the surface to a desired orientation when the instrument is at least partially inserted into the stop, using the instrument to form a cavity in the long bone with the punch at the desired rotational orientation with the instrument inserted at least partially within the stop, the cavity having a shape similar to the stem of the implant, and implanting the stem into the cavity.

Intramedullary fixation device, having an intramedullary rod (2) which is provided for insertion thereof into a bone (1) and consists of a central screw (4) having a first free end comprising a stopper (7) and a second free end with a pre-tensioning nut (8), an alternating series of expanders (3) and bolts (5) being arranged in between, the bolt surfaces in contact with the expanders (3) having a wedge shape. The bolts (5) or expanders (3) may have no, or one or more variations in the dimensions of the different geometric parameters, in accordance with the adjacent expanders, along the length of the implant, and the central screw (4) may have a variable cross section. The device may have different additional components, such as an osteotomic base (9) for fixation of the musculature. The device promotes maximum nailing limited between these elements and produces a controlled peripheral radial deformation.