Abstract:
The instantly disclosed implant is designed to resurface or partially replace (two versions) the arthritic or osteonecrotic femoral head in an anatomic fashion with maximum fixation, durability and stability. It will serve a wide range of patient ages, arthritic/traumatic deformity, and bone pathologies while providing for high performance activity. The implant has absolute fixation utilizing existing, contoured femoral head bone with or without bone cement/porous texturing, an internal plate with modular head attachment, and advantageously benefit from the concurrent use of precision guided instrumentation. This implant optimizes maximal femoral head contact with or without porous contact surfaces but does not rely purely on the head for long term stability. This new concept prevents the common failure mechanisms of femoral neck fracture, loosening and malpositioning as well as makes patient bone quality less important for this high performance hip resurfacing implant.
Abstract:
Die Erfindung betrifft eine für chirurgische Zwecke bestimmte Bohrmaschine (1). Um sogar Bohrungen in Implantate aus hochfesten Titan- oder Kobaltlegierungen einbringen zu können, ist diese mit einer Aufnahme (2) ausgestattet, welche eine Anlagefläche (3) für einen einem Bohrwerkzeug (4) abgewandten Bereich eines einen Prothesenschaft (5) einer Prothese (6) aufnehmenden Knochens (7) aufweist. Die Anlagefläche (3) bildet somit ein Widerlager für auftretende Bearbeitungskräfte. Hierzu ist die hakenförmige Anlagefläche (3) an einem konkaven Bereich der Aufnahme (2) angeordnet. Das mittels eines Spannfutters (8) austauschbar fixierte Bohrwerkzeug (4) ist hierzu gemeinsam mit einem druckluftbetriebenen Antrieb (9) an einem mittels einer Gewindespindel (10) zustellbaren Schlitten (11) angeordnet. Eine mit einem Kugelgelenk (14) ausgestattete Haltevorrichtung (15) ermöglicht zur einfachen Handhabung der Bohrmaschine (1) eine ortsfeste, aber schwenkbewegliche Positionierung.
Abstract:
The invention relates in particular to a joint prosthesis (10) with a cap (11) having a supporting surface, a telescopic arrangement (15) having a telescopic component on the cap side (17) and hence engaging telescopically on the holder side (18) and a holder (16) connected to the telescopic component on the holder side for securing to a bone surface, wherein the supporting surface is formed by the inner surface (13) of the cap which is at least approximately shaped to fit the bone head, and there is a restricting device acting dependently upon the direction, which allows the cap to be moved in relation to the holder in the direction away from the socket and prevents or at least hampers movement towards the socket; and a surgical device for making a drilling with a bush (131) to accept an instrument and a system (125) connected to the bush to accept the joint head at least partially, which brings the median longitudinal axis of the bush into relation with the periphery of the joint head and facilitates the positioning of the device in relation to the bone system.
Abstract:
A surgical instrument (100) for clamping to a ball end of a femur. The instrument includes a body (102) and first (108), second (110) and third (112) clamping arms. The body (102) has a central longitudinal axis (CLA). The first clamping arm (108) is connected to the body (102) and has a proximal end (122) and a distal end (124). The second clamping arm (110) is connected to the body (102) and has a proximal end (130) and a distal end (134). The third clamping arm (112) is connected to the body (102) and has a proximal end (140) and a distal end (144). The distal ends of at least two of the first (108), second (110) and third (112) clamping arms are moveable toward the central longitudinal axis (CLA) of the body (102) to permit the surgical instrument (100) to clamp around at least a portion of the ball end of the femur. The at least two clamping arms are independently moveable relative to one another.
Abstract:
A device for treating fractures comprises an intramedullary member sized and shaped for insertion along a longitudinal axis of a bone within a medullary canal thereof, the intramedullary member including a bore extending laterally therethrough and a lateral implant sized for insertion into the bone through the bore, a distal portion of the lateral implant including a plurality of substantially helical blades in combination with a sleeve slidably received over a proximal portion of the lateral implant, the sleeve being non-rotatably received on the proximal portion of the lateral implant and a locking member for locking the sleeve in a desired position within the bore.
Abstract:
Die Erfindung betrifft eine Femurprothese (1) und einer dazugehörigen Positioniereinrichtung (19), wobei sich die Femurprothese aufgrund einer ausgeprägten Konizität und besonders ausgestalteten Sicherung durch Schrauben (18) durch einen sicheren Sitz bei gleichzeitig einfacher Lösbarkeit auszeichnet.
Abstract:
Screw-based primary fixation (5) of the prosthetic components within the medullary cavity solves the problem of micro-movements encounted in conventional press fit cementless fixation. For a total hip prosthesis (10), the stem (1) is fixed to the medial cortex of the proximal femur by the medial approach alone, obviating the need for drilling of the lateral cortex. The stem (1) may be implanted using a special drill guide instrumentation. Anchoring screws (5) are locked into the stem (1) of the femoral component (10), while self cutting threads on the screw heads (17) engage the pre-drilled medial cortex. This novel fixation principle can also be applied to other joint prosthesis, e.g. finger, shoulder, elbow and knee, as well as to dental and spinal implants.
Abstract:
An implant (10) for replacement of the proximal portion of a femur (12), and specifically for replacement of the natural femoral head is provided. The implant (10) includes a body member (14) for insertion, in use, through the natural femoral neck (8) and in substantial alignment therewith, a head member (16) with a spherical portion for engagement with a natural or a prosthetic hip socket, and an optional sleeve (18) for altering the position of the spherical portion of the head member (16), relative to the body member (14). The body member (14) may also include a collar (20) designed to rest on the resected surface of the remaining intact natural femoral neck (8). A member for joining the head member (16) to the body member (14) is further provided which may integrally join the head (16) and body (14) members or, where the implant (10) is comprised of modular components, the joining member may be in the form of a protrusion (26) or a recess (52) on the body member (14) for engaging a complementary recess (28) or protrusion (56), respectively, on the head member (16).
Abstract:
The invention relates in particular to a joint prosthesis (10) with a cap (11) having a supporting surface, a telescopic arrangement (15) having a telescopic component on the cap side (17) and hence engaging telescopically on the holder side (18) and a holder (16) connected to the telescopic component on the holder side for securing to a bone surface, wherein the supporting surface is formed by the inner surface (13) of the cap which is at least approximately shaped to fit the bone head, and there is a restricting device acting dependently upon the direction, which allows the cap to be moved in relation to the holder in the direction away from the socket and prevents or at least hampers movement towards the socket; and a surgical device for making a drilling with a bush (131) to accept an instrument and a system (125) connected to the bush to accept the joint head at least partially, which brings the median longitudinal axis of the bush into relation with the periphery of the joint head and facilitates the positioning of the device in relation to the bone system.
Abstract:
A medical instrument (30) and procedure mills a groove at a precise angle and location in a partially formed bone canal (14) that has been drilled and reamed to provide a frustoconical seat (62) for a prothesis stem that has a conical proximal region. The groove finishes preparation of the canal in a precise manner so that an anti-rotation lug (24) attached to the conical proximal region of the prothesis stem (16) seats in the finished canal accurately.