Periprosthetic femoral fracture revision locking steel plate

Abstract

The invention relates to a periprosthetic femoral fracture revision locking steel plate. The periprosthetic femoral fracture revision locking steel plate is provided with a U-type body with the shape matched with that of the thighbone. The body can be made of titanium alloy or vitallium. A first contracting part is arranged at the bottom end of the body. Each of the two sides of the body extends to form two wings, and the wings comprise the first wing, the second wing, the third wing and the fourth wing. The body and the wings are provided with a plurality of nail holes. The near end of a fracture can be fixed at multiple angles, the width of the steel plate does not need to be increased, and the screw bonding force, and the bending resisting force and rotating resisting capacity of the steel plate are all higher than those of any former fixing material. By means of locking design, blood supply damage caused by the fact that a steel plate is too closely attached to the bone face and the periosteum and soft tissue are excessively stripped can be avoided. The force arm of the steel plate is long, and by means of dispersed fixing, steel plate breakage caused by stress concentration or bone ununion caused by stress shielding can be avoided. The minimally invasive percutaneous steel plate internal fixing technology is used in cooperation, and therefore soft tissue injuries 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 types of VancouverA 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. ...

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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