Abstract: A connector for treatment of a fractured femur neck consists of an intramedullary nail to be inserted into the bone cavity through a bore made in the trochanter region. The leading or front end of the nail is provided with an expandable portion that can be urged against the cavity walls of the bone until it is held therein in a firm grip. This operation is carried out by manipulation of a screw in the rear portion of the nail which projects out of the bone by a short length. The rear end of the connector is fastened to the shaft of the femur by means of a flat fixator plate which is firmly fastened to the bone material by screws on the one hand, and to the connector by a socket adapted to be moved along the rear end by a screw-thread connection. The two fractured bone parts are drawn together and held in close attachment by pulling the fixator plate, together with the shaft portion towards the front end of the connector which has been expanded previously and clamps the neck in a firm grip.

Abstract: An intramedullary retraction nail serves to keep the two ends of a fractured and splintered bone at the correct distance and in correct alignment. For this purpose the nail is provided with an expansion element at its front end which can be expanded so as to grip the inside of the cavity walls of one bone end. The expansion of this element is carried out by manipulation of an expanding mechanism from the rear end of the nail protruding out of the other end of the bone. This bone end is held in position by one or two connector strips fastened thereto by screws, while the rear ends of these strips are attached to a retractor body which can be moved along the threaded end of the intramedullary nail so as to stretch the bone parts to their original distance. The retractor body is prevented from rotating about the nail end, thus the fractured bone parts are not only held at their correct distance but also in a desired angular alignment.

Abstract: A nail for insertion into the medullary cavity of a fractured bone, more especially a thighbone, consists of a hollow outer sheath of a diameter substantially equal to that of the narrowest part of the bone cavity, which sheath is longitudinally slotted at the front end adapted to be driven into the bone as far as the flared part at the far end of the bone cavity, while a short rear portion of the sheath is left to protrude out of the rear end of the bone. A wedge provided with inner screw thread is positioned in the slotted front end during insertion of the nail and is adapted to be pulled deeper into the sheath by the rotation of a screw-threaded bar passing through the hollow sheath, said wedge thus spreading the branches formed by the sheath material left between the slots and bringing them in contact with the solid bone structure.