INTERVERTEBRAL DISC ENDOPROSTHESIS Russian patent published in 2018 - IPC A61F2/44 

FIELD: medicine.

SUBSTANCE: intervertebral disc endoprosthesis contains upper and lower axisymmetric and opposite supporting plates with serrated fixation elements in the bodies of the vertebrae on plates outer surfaces and elastic supporting-centering elements installed between them. The supporting plates are provided with annular beads on inner surfaces and located at different distances from the center by two concentric rows of holes located at the same angular distance from each other in staggered order. The supporting-centering elements are made in the form of V-shaped rod springs of round section with ends curved parallel to the supporting plates axes, embodied in their mirror located holes, vertices of springs, enshrined in holes of rows proximal to the plates axis are facing outwards, and distant - facing the axis, and placed accordingly in radial notches on the outer and inner forming cylindrical surfaces of the flat sprung-separation ring installed between the springs vertices. The cavity formed by the supporting plates is filled with bioinert elastoplastic material.

EFFECT: simplified design by excluding movable joints with external friction, dimensional, mechanical wear-prone joints from the composition of its supporting-centering element, absence of wear debris falling into the human body tissues, and consequently, of the need to remove them during inspection, ensuring the stability of relative position elements of the implant, simplified manipulation for its installation, increased service life of the implant and reduced duration of surgery.

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