摘要:
A saddle-type prosthesis for replacement of a hip joint; includes a shank assembly for engagement in a femur, a saddle-shaped head having a seat to form a bearing area for engagement by a portion of a pelvic bone, and a mounting for so coupling the saddle-shaped head to the shank assembly as to permit a pivoting of the saddle-shaped head relative to the shank assembly about at least two predetermined axes for rotation with at least two degrees of freedom wherein one of the predetermined axes is positioned above the bearing area of the saddle-shaped head.
摘要:
Endoprosthesis having two prosthesis parts which are connected by mutually overlapping lugs. The safety of the connection is increased due to the fact that the ends (5) of the lug clamp (3) are received in a positive-locking manner by pocket clamps (9) on the respective other prosthesis part. The engagement position of the lugs (3) is secured by screws (7). The contact surface (6) with which the lugs (3) face one another, runs at an inclination to the longitudinal axis of the connection region (2) of the prosthesis, which, on the one hand, allows the thickening of the lugs (3) near to their transition into the associated prosthesis part and a good power transition and, on the other hand, permits a clearance-free engagement of the ends (5) of the overlapping parts (3) with the pocket clamps (9) in the engagement position.
摘要:
Device for connecting bone fragments by a bone plate (1), which is to be connected to the bone fragments using screws (5). A screw (5) or group of screws is connected to a coupling part (6) at a fixed angle, which coupling part surrounds the bone plate (1) transversely, on the one hand forming with the underside (3) of the plate a swivel bearing and on the other hand having a cover plate (10), which contains at least three fixing screws (16) arranged laterally offset with respect to the swivel bearing. By adjusting these fixing screws, the coupling part with the associated screws can be angularly adjusted with respect to the bone plate.
摘要:
The invention relates to a joint prosthesis having a shaft made from a titanium alloy, in which at least the shaft is investment cast and has a body-centered cubic crystal structure. A titanium alloy having this crystal structure (known as β-titanium alloy) has an advantageously low modulus of elasticity which is well matched to the physiological demands of joint prostheses. Furthermore, implementation as a shaped casting allows a complex shape to be achieved. It is particularly embodied as a femoral prosthesis for an artificial hip joint, which has an elongate shaft with grooves and sawtooth-like projections for bone anchoring.
摘要:
A bone spreader includes two tubular pin holders which are connected to one another by a parallel guide system, and two pins that are configured to be connected to the bone parts that are to be spread apart. In order to give the bone parts that are to be spread apart a more secure position in relation to one another, at least one of the pin holders is provided with a locking device for a pin located in the pin holder. This locking device includes a locking finger which is movable tangentially with respect to the pin holder and which, in the locking position, engages in a transverse groove of the associated pin and can be formed by a pivotably mounted hook.
摘要:
An energy-efficient method of recovering carbon dioxide (CO2) in a liquid state from a high-pressure gas stream is provided. The method includes cooling, condensing, and/or separating CO2 from a high-pressure gas stream and further purifying the resulting liquid CO2 in a purification zone to thereby provide a purified CO2 product. The purified liquid CO2 product may then be pumped to a higher pressure for further utilization and/or sequestration for industrial or environmental purposes.
摘要:
An intervertebral prosthesis, in particular for the cervical spine, includes a first cover plate to be connected to a first vertebral body, second cover plate to be connected to the second vertebral body, and a prosthesis core which forms an articulation with the second cover plate. The prosthesis core is held by seat of the first cover plate which is designed as a guide device. The core can be pushed into the guide device from the ventral side in the anterior-posterior (AP) direction relative to the first cover plate. A limit-stop plate is provided on the ventral edge of the first cover plate. This limit-stop plate is displaceable in a slide guide between a locking position and a nonlocking position.
摘要:
An instrument for inserting an intervertebral prosthesis, comprising two prosthesis holders which are connected by a parellel guide and can be spread apart from one another and are intended to receive a pair of prosthesis plates. The first prosthesis holder is arranged fixedly on an elongate instrument body. The second prosthesis holder is held from the instrument body by means of a parallel guide. The parts connecting the second prosthesis holder to the instrument body or to the first prosthesis holder delimit on both sides a central through-opening which extends like a channel in the longitudinal direction of the instrument body and whose width corresponds at least to the transverse dimensions of a prosthesis core, to be inserted between the prosthesis plates, and of the prosthesis core holder provided for this.
摘要:
A hip prosthesis includes a shaft which can be inserted into a hole in the femur without using cement. The proximal section of the shaft includes a base body having a form that is complementary to the shape of the hole in the femur into which the shaft is to be inserted. The hole is made using a tool of a shape corresponding to the base body. The base body has a cuneus rib raised on its dorsal or ventral surface that has a width in its center that is at least three times its height. The rear surface of the cuneus rib has rough and abrasive properties.
摘要:
The invention relates to an insertion instrument for an endoprosthesis (1), which comprises a neck part (12) and a shaft part (10) which is to be inserted into a medullary cavity, comprising a clamping device (2) which is provided with a holding fork (25) and a thrust bearing (26), which are embodied in such a manner that the endoprosthesis (1) is held fixedly in a clamped state and is released in an unclamped state, in addition to a striker device (3). The aim of the invention is to simplify the safe and precise insertion thereof such that a guide rail (23) for a striker element is arranged in a fixed manner on the clamping device (2) and is oriented in such a manner that a path, which is determined by the guide rail, leads to an end face of the endoprosthesis (1) which is held in the clamping device (2).