INTERVERTEBRAL DISK REVISIONAL ENDOPROSTHESIS Russian patent published in 2017 - IPC A61F2/44 

FIELD: medicine.

SUBSTANCE: revisional endoprosthesis of the intervertebral disc contains oppositely and coaxially located support plates with spear-like flat fixation elements on the outer sides against transverse displacement relative to the vertebrae, and a disk of alloplastic material that is a part of the movable plates connection. T-shaped through grooves for plate adapters are made on the inner surfaces of support plates and fixed on the end surfaces of the insert located between the support plates and having the form of a flat, sealed membrane box consisting of two elastic corrugated disk diaphragms fixed to each other, with the cavity filled by a bioinert liquid with antifriction nanoparticles of unmodified carbon, and containing axially symmetrically mounted hirulen disk and titanium alloy stop attached to the membrane bottom parts and facing each other, respectively; their convex and concave spherical end surfaces form a spherical movable joint. The through grooves are provided with stops for plate adapters at one end and flat elastic latches at the other end, and the spear-shaped locking elements are bifurcated and resilient in the radial direction and are provided with facets with opposite angles of inclination on the outer side surfaces.

EFFECT: increased stability of the mutual arrangement of endoprosthesis elements, simplifed installation, reduced wear of element surfaces, forming a flexible joint, increased implant service life, reduced duration of surgery and significantly reduced duration of the postoperative recovery period.

9 dwg