Abstract: Systems and methods and augments for supporting an acetabular shell at a hip bone. An example system of modular augments can include first and second augments, each having a body extending from a respective first end portion to a respective second end portion. The first augment second end portion can include a first coupling element and the second augment first end portion can include a second coupling element. Together the first and second coupling elements can form a coupling mechanism to join the first and second augments together. In some examples, the coupling mechanism can include a bulbous tip portion and a recess to receive and retain the bulbous tip portion.

Abstract: The invention relates to an endoprosthesis shaft system for elongate bones, comprising an anchoring part (10) and a shaft (1), which is formed from module elements that can be coupled by means of a plug-in connection (45), wherein a mutual rotation of the elements along the shaft (1) is adjustable and is blocked by means of an anti-rotation mechanism. In order to adjust the rotation, a rotation piece (5) is provided as a further module element, which has a self-contained rotation adjustment device (6) and a clamping device (7) as a mechanism for blocking the rotation. The rotation piece (5) comprises two end faces for the plug-in connection (45) and a sleeve (77). The invention provides, with the rotation piece, a particular module element for the shaft, which as a structural unit allows both an adjustment of the rotation and a blocking against undesired rotation in a self-contained unit.

Abstract: The present invention relates to an expandable implant for engagement between vertebrae generally comprising an inner member, outer member, and gear member positioned coaxial with respect to each other such that the inner and outer members are moveable relative to each other along an axis. The gear member is axially fixed to the outer member and freely rotatable with respect to the outer member and the gear member threadedly engages a threaded portion of the inner member to translate inner member along the axis. The implant is configured to engage the vertebrae in a predetermined alignment and the gear member includes gear teeth exposed to the exterior and configured to be accessible by a tool member at a plurality of angular positions around the perimeter of the implant device.

Abstract: The invention relates to a shaft for a femoral neck prosthesis, which comprises an anchoring area (27, 29) which is arranged inside the femur in order to anchor the prosthesis into bone, a head area which is axially adjacent to the anchoring area (27, 29) on the proximal side, said head area comprising a device (13) which is connected to the prosthesis head (15), in addition to a distal end which is arranged opposite the head area in the axial direction of the anchoring area (27, 29). The invention is characterised in that the maximum cross-sectional dimension of the head area is at the most equal and, in particular, smaller than the maximum diameter of the anchoring area (27, 29), in such a manner that the maximum cross-sectional dimension of the shaft (11) is in the anchoring area (27, 29).

Abstract: A stabilizer for receiving an end of a spinal implant. The stabilizer includes a gap that creates a socket for receiving the spinal implant. Bodies of the stabilizer are manufactured in a plurality of shapes. A cover is capable of blocking egress of the spinal implant from the socket.

Abstract: For replacing a human hip or knee joint and the adjoining bone sections, an implantable prosthesis is provided, comprising a joint replacement part (10), a shaft replacement part (12) and a rod-shaped shaft anchoring part (16) being insertable into an axial cavity (14) in the shaft replacement part (12).

Abstract: A modular joint prosthesis includes a nail for insertion into a bone marrow canal, the nail Slaving a nail neck. A neck piece has a proximal end, a middle shaft portion defining a longitudinal axis, and a distal end with a conical pin to which a slip-on joint hall can be attached. The proximal end of the neck piece has a helmet-shaped receiving head that includes an insertion opening for insertion of the nail neck or a module connector, a slot extending in the direction of the longitudinal axis, and corresponding recesses positioned on either side of the slot and extending perpendicularly to the longitudinal axis. The corresponding recesses receive a tensioning means which, in a tensioned state. clampingly fixes the nail neck or the module connector in the receiving head by frictional engagement in a jaw-like manner by application of tightening torque sufficient to prevent axial displacement and rotation.

Abstract: The invention relates to a joint part prosthesis, particularly for a finger joint, consisting of either a proximal or a distal component, as well as a shaft that extends away from this component, to be mounted in a bone, which shaft is configured with a fin-like anti-twist device. According to the invention, it is provided that as an anti-twist device (7), at least two anti-twist elements (8) are disposed on the mantle surface (6) of the shaft (4), with rotation symmetry, and extend radially away from this mantle surface (6) and in the longitudinal direction of the shaft (4), whereby the distance of the anti-twist elements (8) from the mantle surface (6) decreases slightly in the direction toward the free end (5) of the shaft (4).

Abstract: An implantable, adjustable prosthesis includes a first component which may be moved relative to a second component by use of a transcutaneous control signal. A method of operating such a prosthesis is also disclosed.

Abstract: A growing prosthesis comprising a joint replacement part, a prosthesis stem, a stem-anchoring element, and an element with corresponding drive provided for the lengthening of the growing prosthesis. The element provided for the lengthening of the growing prosthesis is a spindle element arranged in the stem-anchoring element.

Abstract: A modular prosthesis according to embodiments of the present invention includes a diaphyseal element adapted for implantation into a bone, a metaphyseal element with a mount adapted to receive a prosthetic articulating surface, a fluid reception chamber formed between the diaphyseal element and the metaphyseal element, the fluid reception chamber having proximal and distal ends and a side wall, one end being formed by the diaphyseal element and the other end being formed by the metaphyseal element, and an injection canal in fluid communication with the fluid reception chamber, wherein the fluid reception chamber is configured to receive fluid injected via the injection canal, such that a length of the modular prosthesis is adjustable in a longitudinal dimension based on a volume of fluid received by the fluid reception chamber. Progressive insertion of agglutinating fluid into the fluid reception chamber lengthens the prosthesis.

Abstract: A proximal femoral ball assembly having a variable offset that is selectively adjustable to conform to various anatomical conditions encountered during a femoral surgical procedure. The femoral ball assembly generally includes a head, a neck, and an adjustment mechanism. The head has a smooth spherical outer surface that is adapted to engage an acetabular component or native acetabulum. The neck extends outward from the head and removeably connects to the head using a threaded attachment.

Abstract: An implantable, adjustable prosthesis includes a first component which may be moved relative to a second component by use of a transcutaneous control signal. A method of operating such a prosthesis is also disclosed.

Abstract: An implantable, adjustable prosthesis includes a first component which may be moved relative to a second component by use of a transcutaneous control signal. A method of operating such a prosthesis is also disclosed.

Abstract: An orthopedic device for ball and socket joint reconstruction. The anchor stem is adapted to be anchored in a medullary canal. A proximal portion of the anchor stem includes a threaded hole oriented along a longitudinal axis thereof. Metaphyseal portion includes a proximal end with recess and a longitudinal bore in fluid communication with the recess, and a distal end adapted to interface with the proximal portion of the anchor stem. An anti-rotation structure is preferably located at an interface of the anchoring stem to the metaphyseal portion to prevent rotation of the anchor stem relative to the metaphyseal portion around the longitudinal axis. A fastener is provided to extend through the longitudinal bore and to engage with the threaded hole on the anchor stem to fix the metaphyseal portion to the anchoring stem. The locking assembly is located in the recess and mechanically couples the head of the fastener to the metaphyseal portion to limit rotation of the fastener relative to the metaphyseal portion.

Abstract: The present invention relates to a non-invasive expandable implant utilizing energy from an epiphyseal growth plate of a human long bone to expand the implant. A bone replacement section includes a housing, an expansion shaft, a connection system, and an implant member. An anchoring member is secured to the second bone portion and spaced from the implant member. The expansion shaft is configured to translate a first distance between the housing and the first bone member. Growth of the bone causes an increase of a second distance between an implant portion and the anchoring member. The increase of the second distance causes the anchoring member to exert a force on a connection system causing an increase of the first distance, thus expanding the implant.

Abstract: A proximal femoral head assembly having a variable offset that is selectively adjustable to conform to various anatomical conditions encountered during a femoral surgical procedure. The assembly includes a femoral head, a neck removeably connectable to the femoral head, and an adjustment mechanism. The adjustment mechanism provides the neck with a plurality of different femoral offsets with respect to a femoral hip stem.

Abstract: A surgical distraction device is provided for applying extending or tensioning force non-invasively to a patient's skeleton or to an implant which comprises anchoring means for attaching first and second components of the device to a bone or to adjoining bones, said components being connected by a linkage of an extendible length, a magnet connected to the linkage via a reduction gearbox and actuating means located externally of the patient for generating a moving or varying electro-magnetic field, thereby causing the magnet to rotate and the linkage to be extended.

Abstract: The invention relates to a reinforcement endoprosthesis for use in a femoral bone which is resected at an end of a hip joint and at an end of a knee joint. The endoprosthesis includes a stem part of an artificial hip joint and a condyle part of an artificial knee joint. The connecting part between the stem part and the condyle part is configured as a two-piece intramedullary nail which extends inside the femoral bone. One part of the intramedullary nail is a massive intramedullary nail with a connecting portion for a thread and a thread attached thereto and another part of the intramedullary nail is a hollow intramedullary nail with a female thread matching the thread of the first part. The female thread can be screwed with the thread, thereby allowing a length adjustment of the endoprosthesis.

Abstract: A surgical distraction device is provided for applying extending or tensioning force non-invasively to a patient's skeleton or to an implant which comprises anchoring means for attaching first and second components of the device to a bone or to adjoining bones, said components being connected by a linkage of an extendible length, a magnet connected to the linkage via a reduction gearbox and actuating means located externally of the patient for generating a moving or varying electro-magnetic field, thereby causing the magnet to rotate and the linkage to be extended.

Abstract: A long bone prosthesis includes upper and lower articulating components, with the free ends of the components configured to engage a corresponding prosthetic joint. The overall length of the articulating components is adjustable to approximate the length of a patient's long bone, such as the humerus. The articulating components include a stem and collet arrangement for fixing the relative axial and rotational position of the components. A tapered lock nut is threaded onto the outer threaded surface of the collet portion to provide a pressure engagement of the articulating elements. Various surface features can be implemented among the components of the prosthesis to enhance the pressure fixation, restrict rotation or provide indexed movement of the articulating components relative to each other.

Abstract: A prosthetic component includes an adaptor having a first end and a second end. The first end includes an elongated male tapered body. The second end includes a flange extending radially outwardly from the male tapered body and having an anti-rotational/anatomically orientation component formed therewith. The second end also includes a female tapered aperture formed therein which has an anti-rotational/anatomical orientation component formed therewith. The flange may include an elongated portion having a porous annular surface thereon.

Abstract: Alloplastic replacement for a long bone, in particular for young persons. It comprises a length-adjustable part with a threaded spindle (7), a nut (11) which can be screwed onto the latter, and a sleeve (5) receiving the spindle (7) as far as the nut (11), which are provided with rotation-locking means (9, 12) in connection with a groove (8) included in the threaded spindle (7).

Abstract: A bone attachment assembly for a remaining portion of a long bone diaphysis following resection is provided. The assembly includes a main body, means for anchoring the device with respect to the remaining bone portion, such as an anchor body, and means for attaching the main body to the means for anchoring. The means for attaching the main body may preferably be in the form of one or more washer springs retained upon a connecting rod attached to the means for anchoring. The assembly may be connected to an orthopedic appliance, an interposed orthopedic appliance connected to a second bone attachment assembly, or a transcutaneous bar for attaching an external appliance. A reaming device for creating an intramedullary cavity, a guide device for guiding an aperture-forming procedure in a remaining bone portion, and a milling device for shaping an interface surface of the bone in a preselected geometry are also provided.

Abstract: A joint prosthesis having an intramedullary insert. The intramedullary insert has an elongated body with an attached coil spring. The coil spring may be constructed to provide variable flexibility at different locations along the spring. A control rod is inserted through the coil spring and attached thereto further modifying the flexibility of the coil spring. The shape of the control rod may be varied throughout its length producing different flexibility. The selection of a particular coil spring and a particular control rod resulting in particular joint prosthesis.