Abstract: An instrument system for the operative correction of vertebral displacements and for the stabilizing of repositioned vertebral bodies is described which is characterized by correction and support devices which are formed in two parts and which are displaceable in the axial direction guided relative to one another by means of an integrated setting member, as well as by interim spacers which are adapted in their spacer dimensions to the respective correction and support devices and by perforated hollow cylinder implants which are provided with outwardly lying fixing members and which are replaceable by the correction and support devices in repositioned vertebral bodies.

Abstract: The invention concerns a distraction device for moving apart two bone sections, in particular for extending bones or bridging a gap in a bone, the device comprising an intramedullary nail (1) which can be introduced into the medullary space of a bone and comprises two parts (2, 3) which can be moved axially and can each be secured to one of the two bone sections. The distraction device further comprises a drive unit (4) that drives a drive shaft (16), and a device for converting the rotational movement of the drive shaft (16) into a relative axial movement of the two parts (2, 3) of the intramedullary nail (1).

Abstract: The distraction system for long bones includes a guide socket (42) and an intramedullary pin (10). It will make possible, in addition to elongation, also a segmental dislocation, as well as a segmental dislocation in combination with an elongation without repeated surgical intervention, while assuring a sufficient pressure on the bone contact surfaces of the docking site. Intramedullary pin (10) is thus provided on its outside wall with a projection (41) which engages in a longitudinal hole (43) in guide socket (42), whereby intramedullary pin (10) is secured against rotation by means of guide socket (42) attached in the long bone, but can be displaced axially.

Abstract: A medullary nail (10) has a cavity (12) in which an inner part (20) can slide longitudinally without being able to rotate. The wall (11) of the medullary nail (10) which forms the cavity (12) is traversed on opposite sides by an elongated hole (16) in the region of the driving-in end (14). At least one fastening hole (22) aligned flush with the elongated hole (16) is provided in the inner part (20). When the connecting screws are driven into the spaced fastening holes (15, 16, 22) and an osteotomy is located between the connecting screws (15, 22), the edges of the osteotomy are moved apart as the inner part slides longitudinally, and the slowly widening gap between the edges of the osteotomy becomes filled with bone tissue.

Abstract: The device for guiding an internal saw (43) for the osteotomy of long tubular bones (50) has an elongate stem (10), a mandrel (20) which projects centrally from one end of the stem and in its peripheral surface (22), parallel with its axis, there is recessed a longitudinal groove (23) which continues in the stem (10) and through it in a longitudinal recess orientated in alignment with the longitudinal groove and it also has a spacer sleeve (30) adapted to be longitudinally displaced and fixed on the mandrel (20).