摘要:
The present invention relates to a device (4) as well as to a method used for simulating the position and orientation of a plurality of implants (3) constituting a fixation system (1) and thus for simulating the shape of the load carrier (2) used for connecting said implants (3) together. This device (4) includes a base plate (27) that comprises longitudinal parallel tracks (5) as well as crossbars (6) which are capable of displacement in the plane of the base plate (27) and which can be fixed in any position using tightening screws (7). The crossbars (6) include integrated spherical pairs (10) into which the implants (3) can be screwed together with the same extension pins (8) as in the in-situ fixation system so that the height of said implants can be adjusted. The device (4) further includes a mechanical positioning unit (14) whose operation is based on electromagnetic or acoustic signal exchange. This unit (14) is used for positioning the implants (3) into the device so that they have the same position and orientation relative to each other as the implants (3) mounted in situ on the fixation system (1).
摘要:
The invention relates to a device used to connect a longitudinal support (1) to a pedicle screw (2) by means of an accommodating head (3) having a channel (5) to accommodate the longitudinal support, wherein it is possible to freely choose from or mix laterally open, top open or closed accommodating heads. A top open accommodating head (3) facilitates, for example, insertion of the longitudinal support (1), whereas a lateral opening enables lateral corrections. The pedicle screw (2) and the accommodating head (3) are connected via a conical collet chuck (7) in the accommodating head (3) and by a spherical head on the pedicle screw. It is thus possible to subsequently engage the accommodating head (3) and screw in the pedicle screw (2) even without the accommodating head (3), thereby allowing better visibility when assembling the pedicle screw. According to the embodiment, a clamping member (10) for the longitudinal support (1) is built into the clamping screw (36) of the spherical head (9) or integrated into the intermediate element (12) and the longitudinal support (1) and the spherical head (9) can be fastened separately.
摘要:
A hollow cylindrical intervertebral implant with a longitudinal axis (3), a covering surface (1) and a base surface (2), made essentially of a ceramic material presenting a maximum porosity of 30 vol. % and which pores are filled with air. The inventive implant is distinguished by the fact that it compensates the distance (corresponding to intervertebral disk height) - after successful primary fusion - between both vertebral bodies during the absorption process - upon adequate fusion - and is resorbed by said bodies after a certain amount of time.
摘要:
A clamp (10) for fixing bone pins or wires to an external frame (6) is disclosed. The clamp (10) has a central post member (11), a lower vise plate (31) and an upper vise plate (41) urged together on the post member (11) by a spring (60) for provisional placement, a nut (65) for positively locking the vise plates (31, 41) together on an external frame (6), and a pin clamp that can be moved along the axis of the central post member (11), and can receive and clamp either a bone pin or a bone wire. The pin or wire has unlimited angular movement in two planes. The clamp (10) is a captive unit that requires no intraoperative assembly.
摘要:
A threaded washer (1) with a central bore (5) for use with a bone screw (60) is disclosed. The threaded washer (1) is threaded into a counterbore extending below the bone surface and into cancellous bone material. The external washer threads (9) are tapered to provide improved purchase. The bone screw (60) is inserted through the central bore of the threaded washer (1) and threaded into the fragment beyond the fracture. The threaded washer (1) provides improved compressive forces while permitting the bone screw head (67) to be located beneath the bone surface.
摘要:
The invention concerns a bone-fixing device (20; 30) comprising a block (1) and a bone plate (2) which is connected thereto and has a bone-contact surface (3) and at least one plate hole (4) passing through the bone plate (2) in order to accommodate a bone-fixing means. The block (1) comprises a first guide channel (5) and a second guide channel (6) which each accommodate a longitudinal carrier, the two guide channels (5, 6) running parallel to each other and the axes (7, 8) of the two guide channels (5, 6) lying in a plane which is parallel to the bone-contact surface (3). The circular cylinder (9) defined by the first guide channel (5) does not intersect the circular cylinders (10) each defined by the plate holes (4), whilst the circular cylinder (11) defined by the second guide channel (6) intersects the circular cylinders (10) each defined by the plate holes (4).
摘要:
The osteosynthetic fixation device consists of a securing component (1) having a conical head section (11) and an adjoining anchoring component (13) designed for fixing in the bone, and a spherical segment-shaped slotted clamping component (2) with a conical bore (21) to receive the conical head section (11) to clamp inside a connecting component (3) having a spherical segment-shaped bore (31). The securing component (1) has an axially arranged tension component (4) which permits the axial movement and wedging of the conical head section (11) in the corresponding bore (21). The securing device is suitable as a plate/screw system, an external or internal fixing device and especially for fixation of the spinal column.
摘要:
The bone plate comprises an upper surface (6) and a lower surface for application to a bone, characterized in that the lower surface (10) is curved to conform to a cylindrical bone and the upper surface (6) has two intersecting planes (7,8).
摘要:
The suture anchor comprises a first main body (11) of a generally cylindrical shape having a front portion (1), a rear portion (2), a longitudinal axis (3), a curved surface (4) with protrusions (5), a central through-going bore (19) extending from said front portion (1) to said rear portion (2), and a longitudinal slit (12) which opens at said front portion (1) and curved surface (4) and is closed at said rear portion (2). It further comprises a second body (14) having a smaller base (15), a larger base (16), a curved surface (17) and a longitudinal axis (13), said second body (14) being wedge-shaped coaxially introducible with its smaller base (15) into said slit (12) thereby causing expansion of said first main body (11). The second body (14) is provided with a through-hole (6) running transversely to said longitudinal axis (13) and two channels (7) positioned on said curved surface (17) and extending from the orifices (18) of said through-hole (6) to said smaller base (15).