Abstract: Hip joint socket prosthesis with devices for anchoring to the bone. These comprise, for bridging an interspace between the socket surface and the bone, at least one support which projects from the socket surface and which is preferably extensible from the socket inside.

Abstract: A hip prosthesis has a stem which is to be anchored in the femur bone and has a transverse surface for support on a subtrochanteric bone surface. The transverse surface comprises a plurality of support parts which engage in the bone at mutual spacings and which preferably radiate in the form of a star from a ring.

Abstract: Endoprosthesis having a stem to be anchored in the bone and a separate bone support. The devices for holding the bone support on the shaft are designed such that the bone support is pivotable, preferably spherically mobile, so that it adjusts itself automatically to the position of the bore surface supporting it.

Abstract: A knee joint prosthesis wherein a first component which is partially embedded in the femur carries a pivotably mounted tubular guide for a pin-shaped second guide mounted on a second component which is partially embedded in the tibia. The second guide is rotatable and reciprocable in the tubular guide, and the extent of the reciprocatory movement is limited by two abutments one of which is mounted on the first component and the other of which is mounted on the second component.

Abstract: A device for embedding in bone, in particular as a femoral hip-joint prosthesis, comprises a head part, a stem to be anchored in the bone, and a support collar terminating the stem at the head end. In order to make it easy for the surgeon, on reoperation, to remove the prosthesis stem from the bone tissue, the support collar can be removed. In addition, it can be combined with an anchor for attachment to the greater trochanter. By this means, on the one hand, the support collar is fixed in the envisaged position and, on the other hand, the greater trochanter participates with the adjacent lateral areas of the bone in taking up the load.

Abstract: A device for anchoring a tension element in a tubular bone comprises an anchoring device attached eccentrically and in a hinged manner on the end of the tension element, the longitudinal dimension of the anchoring device being somewhat larger than the diameter of the medullary canal.

Abstract: A prosthesis which is particularly well-suited for use in the region of the hip joint has a shaft which carries a bearing at one end. The bearing has a rim at its junction with the shaft. The end of the bearing opposite the rim has a saddle-shaped portion including a pair of protrusions which flank a depression. The depression has a pair of bearing surfaces separated by a protuberance which is formed in the depression and extends from one of the protrusions to the other. The prosthesis is installed at a hip joint by inserting the shaft into the end of the femur nearest the pelvis. The shaft is pushed into the femur until the rim on the bearing contacts the end of the femur. One of the protrusions is passed through an opening in the wall of the pelvis so that the wall is received in the depression of the bearing. The wall is contoured so as to conform to the shape of the depression and the protuberance therein and rests on the surface of the protuberance as well as the bearing surfaces of the depression.

Abstract: Holding stand for surgical instruments which has a comb bar having receiving recesses for instrument shafts. To secure or release simultaneously all of the instrument shafts in the associated receiving recesses, a locking bar is allocated to the comb bar, which locking bar is arranged adjacent and parallel to the comb bar and can be moved relative to the comb bar in the longitudinal direction and, at each receiving recess of the comb bar, has a locking lug which, as a result of the displacement, can be pushed over the instrument shaft or removed from the latter, which instrument shaft is located in the receiving recess.

Abstract: A joint endoprosthesis and an instrument for knocking it in or out, which are provided for mutual connection with collaborating ribs and grooves, on the one hand, in a fork arranged on the end of the instrument shaft and, on the other hand, on the neck of the prosthesis, the direction of the instrument shaft being transverse to the plane of the fork. To obtain a positive, play-free and sensitive connection between the instrument and the prosthesis, the end of the instrument shaft is taken as a locking pin through a threaded bore in the fork and the prosthesis contains a locking recess for receiving the locking pin.

Abstract: A femoral hip joint prosthesis with a stem (6) which is intended for anchorage without cement in the femur (1) and the proximal end section of which, in order to substantially fill the spongy part of the femur, is greatly thickened in the trochanteric region (14) thereof, as compared with its distal section (12), comprises a thickening which is made in the form of a plurality of longitudinal ribs (15) which project from a slender stem core (17) on the dorsal and ventral sides thereof and which face the medial side with a broad surface and have a multiplicity of perforations (20) which are substantially closed towards the ridge (18) of the rib. As a result, the conditions for the transmission of forces to the bone tissue in the proximal end section of the prosthesis stem are improved, it being possible at the same time to exert a favorable influence on the elasticity of the stem.

Abstract: A surgical chisel is formed by a flexurally rigid chisel shank and a thin, elongated chisel blade fixed at its front end, which are both displaceably guided in slideways in a chisel guide, which lends the chisel blade buckling resistance.

Abstract: A prosthesis for the knee joint has a tibial component and a femoral component. No mechanical connection exists between these components. The tibial component includes a shaft which carries a platform and is received in the cavity of the tibia so as to position the tibial component. The platform supports a bearing element which engages the femoral component and, in addition, a projection is mounted on the platform and extends towards the femoral component. The femoral component includes a shaft which carries a hinge and is received in the cavity of the femur to position the femoral component. The hinge, which defines a pivot axis for bending of the knee, comprises a hinge pin having a recess which faces the tibial component. The projection is slidably received in the recess and defines a rotational axis about which limited rotation of the tibial component relative to the femoral component may take place. In addition, the projection maintains the hinge pin in requisite position.

Abstract: A hip joint prosthetic device having a support shank to be fitted into the medullary canal of the femur and which, in its proximal region, has a curvature in the AP plane with a center of curvature at its anterior that makes the shank more compatible to naturally existing conditions of the femur, permits a substantial increase in the shank thickness, reduces shank tendency to turn within the medullary canal, simplifies the prosthesis operating procedures and improves the association of the shank with the trochanter region of the femur.

Abstract: The invention relates to a vario-head endoprosthesis, consisting of a ball-shaft prosthesis (5), for example a femur prosthesis, and a vario-head socket (1, 2) which is provided with a positive safeguard for the prosthesis head, in the form of a construction of the aperture of the socket. To prevent an undesirable dislocation of the prosthesis head from the socket, the constriction is formed, according to the invention, by a ring (11) which is held in an annular groove (8) in the socket, close to the aperture. After the head has been inserted, the ring can be pushed in and withdrawn in the circumferential direction through a cut-out (10) in the groove.

Abstract: The pins of a cranial extension holder engage indirectly in bitemporal cranial bores by means of plastic sleeves which cover the wound with a flange and, due to the conicity or splayability of the pin, make clean contact with the surface of the bore. Relative movements between the sleeves and the bores are prevented since the pin is rotatable relative to the bracket. The pins are adjustable in their longitudinal direction in the bracket which is constructed without joints.

Abstract: A prosthesis instrument for implanting a pair of separate tibia plates of an endo-knee prosthesis and having a pair of supports with tibia plate locating rods and clamps for rigidly supporting the tibia plates and laterally adjustable for establishing a predetermined implanted relationship thereof.

Abstract: A hip joint prosthetic device having a support shank to be fitted into the medullary canal of the femur and which, in its proximal region, has a curvature in the AP plane with a center of curvature at its anterior that makes the shank more compatible to naturally existing conditions of the femur, permits a substantial increase in the shank thickness, reduces shank tendency to turn within the medullary canal, simplifies the prosthesis operating procedures and improves the association of the shank with the trochanter region of the femur.