Controllable and slidable locking compression plate for femoral neck

Abstract

The invention discloses a controllable and slidable locking compression plate for a femoral neck. The controllable and slidable locking compression plate for the femoral neck comprises a fixation steel plate, wherein the shape of a mounting surface of the fixation steel plate is matched with an anatomical structure at a near end of a thigh bone; a femoral shaft fixation hole, multiple screw thread locking holes and multiple sleeves are arranged on the fixation steel plate, a fixation screw is arranged in the femoral shaft fixation hole, the multiple sleeves correspond to multiple screw thread locking holes one by one, each sleeve is matched and connected with the corresponding screw thread locking hole and is coaxial with the screw thread locking hole, a slidable screw and a limit body used for limiting excessive looseness of the slidable screw are arranged in each sleeve, a sliding space exists between the limit body and the corresponding slidable screw, and the size of each sliding space can be controlled by regulating the length of the corresponding limit body. The controllable and slidable locking compression plate for the femoral neck has the advantages that continuous and sliding pressurization can be provided for a fracture end in a fracture healing early stage of the femoral neck, and excessive sliding produced by the screws in the sleeves also can be avoided, so that shortening of the femoral neck is reduced to the utmost extent while the fracture healing of the femoral neck is guaranteed.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a femoral neck controllable sliding pressurized locking steel plate. Background technique [0002] Femoral neck fracture is the most common injury of the hip, and its incidence is second only to distal radius fracture in systemic fractures. This kind of fracture is mostly caused by accidentally falling while walking and landing on the hip. After the injury, the hip hurts and cannot stand and walk. Femoral neck fractures in young people are mostly caused by strong violence such as car accidents or falls from heights. Most of the femoral neck fractures have obvious displacement, and because of the greater leverage in this part, the fracture is unstable and requires surgical treatment. [0003] There are many fixation methods for femoral neck fractures. The currently accepted methods are multiple compression screws, proximal femoral neck locking plate, and dynamic hip scre...

AI Technical Summary

Problems solved by technology

[0003] There are many fixation methods for femoral neck fractures. The currently accepted methods are multiple compression screws, proximal femoral neck locking plate, and dynamic hip screw fixation. However, there are still many problems in the use of these existing fixation devices. , for example: (1) three-screw fixation, poor stability, easy to displace the femoral head, resulting in nonunion of the femoral neck or bone malunion; (2) continuous sliding pressure after surgery may easily cause excessive shortening of the femoral neck, exceeding 5mm It will seriously affect the function of the hip joint; (2) dynamic hip screw fixation has high mechanical strength, but it is also prone to excessive sliding, and once nonunion occurs, the local bone defect area is too large, making revision difficult; (3) femoral neck Proximal locking plate, although the initial stability after internal fixation is strong, avoiding the risk of redisplacement of the femoral neck, but because the locking screws limit the postoperative sliding pressure of the fracture end, it is easy to make the fracture end 2 weeks later Necrotic absorption gaps appear, resulting in nonunion of the fracture end or fracture and failure of internal fixation

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