Patent RU-2621949-C1 (RU)
Title: Combined implant and instruments for its installation
Inventor: KOPYSOVA VALENTINA AFANASEVNA
IPC: A61B17/68
Filed: 2016-06-02
Granted: 2017-06-08
Abstract: FIELD: medicine. 
     SUBSTANCE: combined implant includes a wedge-shaped porous metal implant and an extramedullary metal plate. The wedge-shaped implant has side-sloping side walls connected by an upper wall in the center of which an aperture with an internal thread is located, front and rear walls. The extramedullary plate has holes with a conical recess for fixing screws with a submerged head. The extramedullary plate is made of titanium nickelide with a thermomechanical shape memory, with a conical central recess, terminating with a hole for the attachment screw with a submerged head, has paired legs on both sides, bent down at an angle of 45° and directed towards each other, has a protrusion located on the underside in the plate center in the transverse direction, made in conjunction with the longitudinal groove of the wedge implant. The wedge implant is made of porous titanium nickelide with a porosity of 70-80%, the lateral walls converge to form a wedge, the surface of the side walls is corrugated in the form of longitudinal grooves forming L shaped teeth, the front and rear walls are triangular. The upper wall is in the form of a quadrilateral, in the middle of which a longitudinal groove is located to install the extramedullary plate protrusion. In the center of the longitudinal groove, a bushing made of titanium with an axial hole with an internal thread is inserted to install the connecting screw. The wedge-like analogue of a wedge implant in the form of a wedge with smooth walls has oblique laterally converging lateral walls forming a pointed end, front and rear walls in the form of a triangle, an upper wall in the form of a quadrangle. An element for connection with an implantator is located on the top wall. The form of the wedge-analogue of the wedge implant corresponds to the shape of the wedge implant. The element for connection with the implantator is made in the form of a longitudinal groove passing in the middle of the upper wall for installation of plates located at the lower end of the implantator outer tube. In the center of the longitudinal groove, a bushing of titanium with an axial hole with an internal thread is inserted for connection to the inner core of the implantator. An implantator for installation and removal of a wedge implant and its wedge-shaped analogue includes a handle with a shock pad, a rod with a working end having a threaded portion. The implantator consists of a T-shaped body where the inner core is inserted. The implant body includes an outer tube having oppositely disposed plates at the working end for insertion into a longitudinal groove of a wedge-shaped analogue and a transverse handle having an opening in the center to insert an inner rod with a working end. The handle has shock pads on the top and bottom sides of the outer tube. The inner core has a head with a through cross hole for reception of the rotary shaft from the top and a threaded portion on the working end corresponding to the thread of the female threaded hole in the bushing of the combined implant and the wedge implant analogue. 
     EFFECT: increased stability of fixation with accuracy and reliability of surgical manipulations. 
     5 cl, 2 ex, 15 dwg