RU1807870C - Endoprosthesis of neck of femur - Google Patents

Description

soft tissue, the proximal end of the femur; with external rotation of the femur, the head is easily dislocated from the acetabulum.

The round ligament of the hip joint does not bleed (obliterated). There is an aseptic necrosis in the head. A femoral neck affected by a tumor was resected, and a bone marrow canal curettage was performed.

In the upper third of the diaphysis of the femur in the oblique direction from the bottom up, a channel is drilled, a spongy substance is drilled in the corresponding head of the femur in the corresponding direction. After irrigation of the endoprosthesis of the femoral neck and shaping it (the petals are reduced, the hook with the tooth is unbent), convenient for insertion, its ends are immersed in the corresponding prepared bone channels, while the beveled end of the pin is pressed against the inner surface of the bone channel. After warming to body temperature, the original shape was restored — the petals were consumed, the hook was bent, the tooth was immersed in the bone and it was tightly fixed in the head and diaphysis of the femur. The portion of the femoral diaphysis in which the distal part of the endoprosthesis is located is strengthened by a ring-shaped retainer of titanium nickelide. On top of the endoprosthesis, at an angle to it, an autograft is placed between the diaphysis and the femoral head in a pre-prepared groove ..

Under the head, the plastically restored neck is turned away, 8 - figuratively tendon-fascial flap (from the wide fascia of the thigh). Two additional drainage tubes were introduced through additional incisions. 7 ml units of penicillin are poured into the wound. Seams in layers, iodine. Aseptic dressing.

The restoration of the function of the hip joint occurred after 6 months (in contrast to the old method of isolated bone autoplasty, in which

the hip joint was restored after 12-15 months).

Thus, the claimed endoprosthesis is the first endoprosthesis capable of replacing a defect or a complete absence

the femoral neck with a preserved femoral head.

Thanks to the two locking elements located at the ends of the endoprosthesis. one of which is made of porous titanium nickelide with thermomechanical memory in the form of a socket with diluted petals and a spike of cast titanium nickelide for fastening the femoral head, and the other

represented by the beveled end of the pin from

porous titanium nickelide and hook with serrated end on the end of cast titanium nickelide with

thermomechanical memory is excluded

migration of the endoprosthesis from the bone during hip endoprosthesis replacement, reliable fixation of the femoral head is achieved. This ensures the restoration of the function of the hip joint, reduces the percentage of patients with stamina

disability with this same pathology.

Claims (2)

1. An endoprosthesis of the femoral neck, comprising a fixing pin with fixing tabs at one end and made of titanium nickelide sheet axial rod, the ends of which are removed from the pin and the first of them is bent in the form of a hook, characterized in that, for the purpose of restoration of the anatomical structure of the hip joint, the mounting petals are made movably divergent and opposite located on the connecting pin with a spike in the center, which formed by the second end of the rod, wherein the fixing tooth is provided on the hook of the first end of the rod, and the pin is made of porous titanium nickelide. 2. The endoprosthesis according to claim 1, characterized in that the end of the pin facing the hook is beveled. FIG. Figz