Abstract: The actabular socket supporting ring has a modular construction and is formed of a supporting ring having two securing straps for a cement-free attachment in and on the corresponding bone portions, of a socket cup which is pivotably adjustable in the supporting ring and attachable to the supporting ring by a securing element without the use of bone cement, and of an insert receiving the joint head. The modular construction, and in particular, the pivotable arrangement of the socket cup in the supporting ring, allows a biomechanically optimal alignment of the socket cup, and thus, of the insert receiving the joint ball, and the securing of the socket cup to the supporting ring by a securing element allows an entirely cement-free anchorage of all components.

Abstract: The metal wire structure for endoprosthetics is formed of a sintered hollow mesh knitting of elastic metal wires (D), said knitting being preferably manufactured in the manner of a "rete milanese". Said metal wire structure is either used as a coating (1) of an endoprosthesis (3) or, after having been sintered together, as a bone replacement piece.Such a metal wire structure allows to obtain a good anchorage in the bone, since the pore size of said meshes may be adapted to the local conditions, on one hand, and on the other hand, the remaining elasticity of said meshes allows a suitable transition from said prosthesis to the bone.

Abstract: An implant for the operative correction of spinal deformity, in particular scoliosis, kyphosis, and lordosis, which is a distraction and compression rod, having at one of its end a ratchet part formed by circumferential saw notches conically broadening toward the top and ending in a flat surface for receiving spinal hooks, a cylindrical part followed by a threaded part, the threaded part being build for receiving the heads of bone screws fixed by nuts, wherein the ratchet part of the rod is used for distraction and the threaded part of the rod is used for compression as well as distraction of the deformed spine.

Abstract: The apparatus for electrical stimulation is more particularly adapted for the treatment of scoliosis and comprises an electrical circuit which delivers individual pulses having a duration of about 1 ms, an amplitude of about 150 V, a constant current intensity of about 75 mA and a frequency of 100 Hz as well as series of pulses with rising amplitude and a ramp up phase of about 2 s, followed by holding phase of about 2 s and a time off between two series of pulses of about 10 s. The apparatus further comprises three channels, whereby the first channel is applied on the side of the curvature, the second channel on the side of the counter curvature and the third channel on the abdominal musculature, whereby all channels are fed simultaneously.

Abstract: The bone substitute material on the base of natural bone is rendered completely free of albumin and antigen by premaceration, pyrolization and sintering and its frame work consists of only the natural mineral structure of the natural bone.In the process of production of this bone substitute material the bone pieces are submitted to a pretreatment with warm water for removing of the soft parts, subsequently takes place a dealbumination by means of a solution of 10 to 30% H.sub.2 O.sub.2 in a shaking machine and a degreasing with ether. The bone pieces treated in this way are subsequently submitted to a combustion in a stove at 400.degree. C. to 1500.degree. C. and then to a sintering.This bone substitute material which may exist in the shape of the bone part to be replaced forms a form stable matrix for the bone regeneration in which only pure "mineral bone" is present so that no immunogen reactions can take place.

Abstract: For producing the bone substitute material from collagen and hydroxyapatite, an aqueous solution of cleaned collagen is mixed with a cross-linking agent causing only a partial cross-linking, and the mixture is lyophilized.The quantity of the cross-linking agent is chosen such that the collagen retains its resorbability and its absorptivity vis-a-vis bodily fluids, the material further showing no undesirable side effects.Preferably less than 1% by weight of formaldehyde, one of the preferred cross-linking agents, is added, with reference to the dry weight of collagen, and sintered apatite grains with a diameter of 50-300 .mu.m are used.Such a bone substitute material is stronger and less tearable as previously known materials and insures a good promotion of the growth of own bone tissue and the substitution by it.

Abstract: A bone substitute comprised of collagen material in the form of fleece or a spatial meshwork having apatite, the mineral component of bone material, admixed therewith. The structure of the collagen material may be strengthened by carbohydrate or starch or may be applied, in the form of a coating, to a honeycomb-like basic structure made from a variety of materials.Such a bone substitute has a good support quality, promotes bone growth and also has a good styptic or haemostatic effect.