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 method for manufacturing a lateral bore in a tubular bone for a bone nail to be guided through a transverse bore of a bone nail characterised by the following features;knocking in the bone nailintroducing an elongate transmitting unit for energy into the bone nail and aligning an effective end of the transmitting unit, directed transversely to the axis of the nail, to the transverse bore in the bone nail;producing a hole which is relatively small in diameter by way of the effective end from the inside anddrilling out the small hole from the outside, preferably to the core diameter of the bone screw.

Abstract: A bone nail for upper arm fractures, including a hollow first shank adapted to be inserted into the proximal end portion of a medullary canal, the first shank having a distal end that has a slotted portion provided with a plurality of slots and an internal thread extending beyond the slotted portion.