摘要:
Disclosed is an intervertebral disk prosthesis comprising an essentially hollow cylindrical base element (1) which is provided with a casing (2) that is embodied as a bellows, a top end (3), a bottom end (4), and a central longitudinal axis (5), an upper apposition plate (6) which is disposed perpendicular to the longitudinal axis (5) at the top end (3) of the base element (1) and rests on the base plate of a vertebra, and a lower apposition plate (7) that is arranged perpendicular to the longitudinal axis (5) at the bottom end (4) of the base element (1) and leans on the cover plate of a vertebra. The casing (2) that is embodied as a bellows is configured as a spring element having a defined spring rate. Said structure largely approaches the function and purpose of a natural intervertebral disk.
摘要:
The intramedullary nail has a longitudinal axis (5), a near end (1) with means (8) for coupling to an insertion device and a far end (2) with a tip (7) for insertion into the intramedullary canal of a long bone. The far end (2) is provided with at least two traversing through holes (3) with axes (6), all of said through holes (3) being grouped in said far end (2) within a distance x measured from said tip (7) to the axis (6) of the most distant hole (3). The nail is provided with at least a third through hole (3) with axis (6) in said far end (2) which contains the first and second holes (3) and the projection of the hole axis (6) of said through holes (3) in a plane orthogonal to said longitudinal axis (5) is such that at least two of said projected hole axis (6) are at an angle α greater than zero and less than 90° with respect to each other.
摘要:
The present invention relates to inline skates wherein wheel assemblies can be selectively accommodated in or taken out from the interior of a housing inserted into outsoles of shoes. More particularly, the present invention relates to combined inline skates and shoes each of which comprises a rectangular housing that is mounted to an outsole of a shoe and has an open bottom face, four wheel assemblies installed in the housing on a straight line, a gear-type actuating unit for selectively causing the wheel assemblies to be accommodated in or taken out from the housing, an actuating portion for actuating the gear-type actuating unit, a stopper unit for stably maintaining a state where the wheel assemblies are accommodated in or taken out from the shoe, and a brake detachably mounted in a space between a rearmost wheel assembly and the housing. Further, the present invention relates to a brake that can be detachably mounted between the wheel assembly and the housing. More particularly, the present invention is directed to combined inline skates and shoes wherein a brake main body and a brake pad are separately manufactured so that the brake pad can be stably coupled to the brake main body and the brake pad can also be exchanged when it is worn out.
摘要:
The invention relates to a casting material for producing casting molds for casting high-melting point materials. Said casting material comprises a powdered component that contains magnesium oxide and aluminum oxide, and a liquid component. The powdered component additionally contains a calcium aluminate and an alkali fluoride or alkaline-earth fluoride, and the liquid component contains a polyelectrolyte and an alkaline component, said alkaline component adjusting the pH of the liquid component at between 10 and 14. The powdered and the liquid component are mixed, a flowable slip is produced, which is used, once dried, solidified and sintered, to produce a hollow mold.
摘要:
An implant (20) for fixation of a bone includes a shaft (24) having a proximal end (26) and a distal end (28), and a longitudinal axis (30) defined between the proximal end (26) and the distal end (28). A plurality of blades (32) are disposed on the shaft (24), and are helically twisted about the longitudinal axis (30). At least one of the blades (32b, 32d) has a variable blade width (wb, wd) that increases in a direction along the longitudinal axis (30). A mechanism for coupling the implant (20) to a second fracture fixation implant (22) may be provided separately or in combination.
摘要:
The invention relates to a knee-joint endoprosthesis comprising a tibia support surface (10) and a rotating guide which guides the condylar plate (2) situated on the tibia support surface (10) about a rotating axis (1) which is perpendicular thereto. The rotating guide comprises a pivoting body (4) which is arranged on the flat tibia support surface (10) and which can be pivoted thereon about a rotating axis (1) which is perpendicular thereto (10). According to the invention, the pivoting body (4) comprises an axle journal (8) which is approximately centrally or eccentrically positioned therein and which is set into the anchoring element (15) of the tibia support surface (10) in a rotating manner. The pivoting body (4) co-operates with the condylar plate (2) which is provided with a pocket bore hole (11), said pocket bore hole forming a snap connection with the pivotal body (4) by means of a narrow opening (12). To this end, the narrow opening (12) is narrower than the widest circle segment cross-section of the pivoting body (4) so that the condylar plate (2) can slide forwards or backwards on the pivoting body (4) along the walls of the pocket bore hole (11), and can be rotated about the rotating axis (1).
摘要:
The invention relates to a device for moving an X-ray apparatus in a controlled manner. The inventive apparatus is embodied as a C-bow (9) that can be displaced in parallel in relation to at least two axes (18; 19) and is mounted on a pedestal (31) in a rotatable manner in relation to three axes (18; 19; 21). Said pedestal comprises rollers (3) which can be driven by a motor. The direction of said rollers can be controlled. Each movement of the C-bow (9) is carried out in relation to a system of co-ordinates (29) and by means of controllable drive devices (6; 7; 37; 38). Said system is stationary in relation to the room. The drive devices (6; 7; 37; 38) are controlled by means of a computer (23) or a control device (39; 48) which can be controlled by means of a sterile control console or is voice-controlled. Adjusted positions or projections of the C-bow (9) can be stored in the computer (23) in such a way that a desired position or projection can be reproduced. The C-bow (9) can be combined with a surgical navigation system which comprises a position detection device (27). By measuring a reference base (51) that is provided with optical markers (28) and is applied to a patient (12) changes in the position of the patient (12) can thus be considered in such a way that an adjusted position and projection of the C-bow (9) can be reproduced after the patient (12) has changed position.
摘要:
Disclosed is an intervertebral implant shaped as a three-dimensional body (10), comprising: a) a top side (1) and a bottom side (2) used for the positioning thereof against the end plates of two adjacent vertebral bodies; b) a left-hand surface (3) and a right-hand surface (4); c) a front surface (5) and a rear surface (6); d) a horizontal central plane (7) located between the top side (1) and the bottom side (2); e) a vertical central plane (8) located between the left-hand surface (3) and the right-hand surface (4); and f) a plurality of bore holes (9) penetrating the body (10), which receive longitudinal fixing elements (20) and the axes (19) of which intersect the horizontal central plane (7). At least one of said bore holes (9) is configured in such a way that a longitudinal fixing element (10) that is received therein can be connected in a rigid manner to the intervertebral implant. This procedure is carried out effectively by means of a screw thread or corresponding cone-shaped surfaces.
摘要:
The invention relates to a device for linking a longitudinal support (11) with a bone or a bone fragment. The inventive device comprises the following elements: A) a bone fixation device (1) with a lower part (3) to be immobilized on a bone and an upper part (2) to be linked with a longitudinal support (11); and B) a locking ring (15) that can be coaxially displaced on the upper part (2) and that is provided with a center bore (22) having a diameter d; C) the upper part (2) comprises a channel (12) that is open at the upper end (13) of the upper part (2) and that has a channel axis (21) for receiving a longitudinal support (11) running at an angle to the longitudinal axis (5) and two tongues (19) that can be elastically deformed at an angle to the channel axis (21); D) the locking ring (15) can be displaced into a first position in which the two tongues (19) can be forced against the channel axis (21); and E) the upper part (2) comprises between its lower end (14) and the channel (12) a groove (8) having a core diameter DK1 and being concentric to the center axis (5), the core diameter DK1 of the groove (8) being smaller than the diameter d of the center bore (22) in the locking ring (15).