A kind of locking plate for femoral periprosthetic fracture revision and locking

Abstract

The invention relates to a fracture revision locking plate around the femoral prosthesis, which has a U-shaped main body matching the shape of the femur. The material of the main body can be titanium alloy or cobalt-chromium-molybdenum alloy; the bottom end of the main body has a constriction; two side wings are extended on both sides of the main body, which are respectively the first side wing, the second side wing, and the second side wing. Three flanks and a fourth flank; the main body and the flanks are provided with several nail holes. The present invention can fix the proximal end of the fracture at multiple angles without increasing the width of the steel plate, and the screw holding force, steel plate anti-bending force, and anti-rotation ability are all stronger than any previous fixing materials; the locking design can avoid excessive stripping of the periosteum due to the plate being too close to the bone surface and blood supply damage caused by soft tissue; the moment arm of the present invention is longer, and dispersed fixation can avoid steel plate fracture caused by stress concentration or bone nonunion caused by stress shielding; combined with minimally invasive percutaneous plate internal fixation technology, soft tissue damage can be further reduced .

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a revision locking plate for fractures around the femoral prosthesis after artificial hip joint replacement. Background technique [0002] Periprosthetic femoral fractures should be treated surgically except for some Vancouver type A fractures that can be treated non-operatively. The usual surgical methods include common plate and screw fixation, pure steel wire or titanium cable cerclage fixation, allograft bone transplantation supplemented by plate and steel wire fixation, etc. Due to the existence of the prosthesis, it is difficult for the proximal screw to pass through the prosthesis, so it can only fix one side of the cortical bone, or due to poor local bone quality and osteoporosis, the screw cannot be tightly occluded with the bone, making the fracture fixation difficult. If it is firm, the patient will not be able to achieve the purpose of early mobilization. Si...

AI Technical Summary

Problems solved by technology

For periprosthetic fractures of the femur, although the embracing device avoids damage to the bone structure, the prosthesis-bone cement-bone interface and the bone cement shell, it needs a large enough contact area to maintain firm fixation, which is bound to increase Soft tissue damage and disruption of periosteal blood supply

Moreover, the selection of the model is very important. Too large fracture ends are unstable, and too small fractures cannot properly encircle the proximal femur.

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