Abstract: An implant for intersomatic fusion of two adjacent vertebrae, particularly by an operation that was performed in posterior manner. The implant has a first implant part and a second implant part that is adjustable relative to the former, for the purpose of distraction. The first implant part and the second implant part are structured so that they supplement one another, in a complementary manner, in the non-distracted state, to form a pipe that is divided in the longitudinal direction. Guide surfaces that extend radially in the distraction direction, and rest against one another are formed on the first implant part and the second implant part. The relative position of the guide surfaces is fixed in place. An instrument for the placement and distraction of the implant is also provided.

Abstract: An instrument for the placement and distraction of an implant for intersomatic fusion of two adjacent vertebrae comprises a hollow rod connected with a handle, and having a pivotable setting element at a front, free end. The element has two pins for insertion into two guide grooves assigned to a longitudinal parting in the implant. There is a sleeve disposed on the hollow rod and connected with a pivot lever which activates a tension piece that engages on the setting element, for pivoting. A hollow screwdriver is arranged in the hollow rod, and a threaded pin to be screwed into a threaded bore of a screw head of a locking screw on the implant passes through the screwdriver.

Abstract: An implant for intersomatic fusion of two adjacent vertebrae, particularly by means of an operation that was performed in posterior manner. The implant has a first implant part and a second implant part that is adjustable relative to the former, for the purpose of distraction. The first implant part and the second implant part are structured in such a manner that they supplement one another, in a complementary manner, in the non-distracted state, to form a pipe that is divided in the longitudinal direction. Guide surfaces that extend radially, in the distraction direction, and rest against one another, are formed on the first implant part and the second implant part. Means are provided for fixing the relative position of the guide surfaces in place. An instrument for the placement and distraction of the implant is also provided.

Abstract: The bone screw according to the invention for connection at a variable angle with a support bar for osteosynthesis, in particular a pedicle screw for implants for correcting and stabilizing a spinal column, has a threaded shaft (2) for screwing into a vertebra (3) and with a screw head (4) for fixing to a support bar (13), the screw head (4) being formed as a partial sphere with a frustoconically tapered peg (6) having a threaded bore (5), the tapered peg (6) with its threaded bore (5) extending at an acute angle to a longitudinal axis of the threaded shaft (2). The tapered peg (6) is securable by means of a screw (10) engaging in the threaded bore (5) to a clamping sleeve (11) forming a seat (12) for the support bar (13).

Abstract: A skeletal fixator including implant screws, a support angularly indexed with respect to a head of the implant screws and which comprises a cavity provided with a screw thread adapted to receive a connecting rod having a screw thread of pitch different from that of the thread of the cavity. A locking screw cooperates with the head of the implant screw to clamp and bind the connecting rod relative to the implant screws.

Abstract: An implant for stabilizing the vertebral column, having a longitudinal support and anchoring screws which can be fastened to the latter in an angularly stable manner so that even long-span multi-segmental instabilities can be treated. As the longitudinal support a sectional rod is provided, to which transverse brackets are clamped. The anchoring screws are fastened at an adjustable angle of inclination to a transverse bracket in each case. The transverse bracket comprises a clamping piece and a connector, which are screwed together. The clamping piece has two jaws which form a suitable receiving opening for the preferably cross-sectionally circular sectional rod and are drawn together by a clamping screw. In addition, two repositioning instruments for altering the position of the vertebral bodies during the operation are described, namely a traction instrument and an instrument which can be used as a basis of application for the traction instrument and which creates a connection between two neutral vertebrae.

Abstract: A device for adjusting a vertebral column with damaged vertebrae comprises an adjustable arm on a guiding axis and a stationary arm attached to the guiding axis, each arm having a hollow receiving body adjustable in two planes for a lengthening rod, which can be connected with a tire-fond. Each arm (2, 4) has an intermediate jointed piece (5, 5a) with an intermediate jointed piece (5, 5a) with two joints (6, 7), each intermediate jointed piece (5, 5a) being connected in a hinged manner to a support (8) for the hollow receiving body which is designed as an attachable cylindrical piece (15) with a tangential drilled hole (16).

Abstract: Apparatus for straightening a spinal column having damaged vertebrae in which support bolts are inserted into the vertebrae on both sides of the damaged vertebrae comprising a guide shaft carrying first and second arms. One of the arms is displaceable on the guide shaft and the other arm is fixed on the guide shaft. A receiving sleeve is displaceable on each arm in mutually perpendicular planes and receives an extension rod which is detachably seated in a respective support bolt.