Abstract: A hip neck screw having a shank, a male-threaded portion at the proximal end thereof and areas for engagement by a tool wherein the screw is designed in such a way that it is adapted to be passed through a bore of a supporting device adapted to be mounted on the femur, preferably a locking nail and to be held therein. The neck screw has axially parallel grooves extending from the distal end are formed at opposite sides, of which at least one extends into the threaded portion. A fork-like blade is provided having blade legs which are accommodated by the grooves and has a connecting portion of the legs adapted to be connected to the distal end of the screw shank.

Abstract: A hip neck screw having a shank, a male-threaded portion at the proximal end thereof and areas for engagement by a tool wherein the screw is designed in such a way that it is adapted to be passed through a bore of a supporting device adapted to be mounted on the femur, preferably a locking nail and to be held therein. The neck screw has axially parallel grooves extending from the distal end are formed at opposite sides, of which at least one extends into the threaded portion. A fork-like blade is provided having blade legs which are accommodated by the grooves and has a connecting portion of the legs adapted to be connected to the distal end of the screw shank.

Abstract: A hollow elongate element of elastic material for transmitting forces in which the walling comprises openings which reduce the bending resistance moment and are arranged such that the torsion resistance moment of the element essentially remains.

Abstract: A supracondylar bone nail has an elongated shank with a distal end and a proximal end and has two bends in the M-L plane. Both bends are in the same direction with screw holes between the distal tip of the nail and the first bend.

Abstract: A locking nail for placement in the marrow space of tubular bones for the care of bone fractures, with an elongate, essentially cylindrical shank with a number of essentially radial openings for accommodating locking screws. At least one radial, elongate opening extends in the longitudinal direction of the shank and at least two sliding blocks are unrotatably guided within the shank and are secured against a movement away from one another so that at least one opening at an angle to the longitudinal direction is formed from at least one intermediate space between the sliding blocks. This opening is aligned to the elongate opening for accommodating a locking screw. In another embodiment, only one such sliding block is used (and can be selected from any of a suitable set, for example a set in which the blocks of the set all have substantially the same length but have transverse bores positioned at a variety of different positions and at different angles with respect to the longitudinal axis of the nail).

Abstract: Drill head for boring out bone channels, characterized by the following features:a central bore for a guide wire;four spiral teeth arranged at 90% intervals on the periphery and having a small angle of twist, such as 15.degree.,that form an angle of approximately 45% relative to the longitudinal axis of bore at the forward end in the starting cut andthat form the main cutting edges andwhose secondary cutting edges consecutive to the main cutting edges are located approximately on a cylinder whose axis coincides with the axis of the bore,the length of the secondary cutting edges located on the cylindrical surface is smaller than the diameter of the cylinder;the rounded base of the slot-like chip chambers between the teeth is radially close to the bore andthe faces of the teeth bordering the chip chambers in the starting cut area are provided with a ground face such that a relatively sharp edge is formed, extending from the ends of the teeth and the chip chamber surfaces between them to the bore.