TELESCOPIC VERTEBRAL PROSTHESIS AND METHOD FOR IMPLANTATION THEREOF Russian patent published in 2014 - IPC A61F2/44 A61B17/56 

FIELD: medicine.

SUBSTANCE: telescopic vertebral prosthesis comprises an upper cylindrical base with its end face comprising an upper rest pad, a lower cylindrical base with its end face comprising a lower rest pad, a ring coupling and prosthesis height adjusters. The externally threaded upper cylindrical base and the internally threaded ring coupling form a screw pair. The lower cylindrical base with the ring coupling form a movable rotary coupling geared by a circular groove and the ring coupling. The end face of the upper rest pad and the end face of the lower rest pad comprise holders and slots. A side surface of the lower cylindrical base comprises slots. The holders are belted along the external perimeter of the upper and lower rest pads uniformly. An arrow-type holder can have a rectangular- or round-sectioned leg and tip. The tip profile has straight or concave borders. The telescopic prosthesis is implanted from a ventral approach to a lesion using common ventral surgical techniques. The prosthesis is inserted between healthy vertebrae by a relative rotation of the ring coupling to adjust the desired elevation of the prosthesis as shown by the pressure transducer readings. The prosthesis height is adjusted at the moment of pressure being within the range of 150-200 mm Hg. The arrow-type holders are belted along the external perimeter of the upper and lower rest pads.

EFFECT: enabling reliable restoration of the primary mechanical stability, forming further secondary metal/osseous unit and avoiding recurrent surgical intervention.

11 cl, 5 dwg