Abstract: The use of a magnesium substance, whose corrosiveness is altered as a result of modification with halogenides, enables medical implants, prostheses or prosthesis parts and medical instruments, devices and auxiliary contrivances, especially surgical instruments or tools, for use in and on the human or animal body to be produced, whereby the degree of corrosion-resistance thereof can be adjusted to full corrosion-resistance.

Abstract: A cutting device (1) for cutting bone tissue (3), which is particularly intended for correcting malpositions, and which enables a segment of the bone tissue (3) to be cut along a predetermined cut surface (5). The cutting device (1) produces a high pressure fluid jet (2) which is guided by a control program stored in a control unit (4) to produce a cut surface (5) having a desired configuration, for example, a circular arc shape. The resulting bone parts (6, 7), created in this manner, can be fixed in a corrective position (8) with little effort and without significant loss of material. A collector (9), which is equipped with a supply line (14) for supplying a rinsing liquid and with a suction line (13), is provided for collecting the fluid from the fluid jet (2). Collector (9) simultaneously serves to reduce the energy remaining in the high-pressure fluid jet (2).