Proximal tibia bone cement pressurizing device

Abstract

The invention discloses a proximal tibia bone cement pressurizing device. The proximal tibia bone cement pressurizing device comprises a barrel, a pressurizing plate, a driving mechanism and a baffle,wherein the pressurizing plate is located in the barrel, is in sealed connection with the barrel and moves in the length direction of the barrel, the driving mechanism is fixedly connected with the top of the pressurizing plate and drives the pressurizing plate to move in the vertical direction, and the baffle is located below the barrel and used for blocking the bottom of the barrel. Bone cementis located in the barrel and located on the lower surface of the pressurizing plate, and the bone cement is pressed into proximal tibia cancellous bone by applying pressure to the pressurizing plate.By arrangement of the pressurizing plate and the driving mechanism, the bone cement can be conveniently pressed into the proximal tibia cancellous bone, the amount of the bone cement entering the proximal tibia cancellous bone is large, the bone cement entering the proximal tibia cancellous bone is deep, a proximal tibia and a tibia prosthesis are well fixed, larger shearing force can be borne, the probability of sterile loosening of the prosthesis caused by bone cement technical defects after total knee replacement is not likely to occur, and therefore, the service life of the knee joint prosthesis is prolonged.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a bone cement pressurizing device at the proximal end of the tibia. Background technique [0002] After total knee arthroplasty, aseptic loosening of the prosthesis mostly occurs on the tibial side, part of which is due to poor bone cement filling on the tibial side. Poor bone cement technology leads to insufficient cement thickness between the prosthesis and the bone end, especially on the tibial side, resulting in insufficient shear force that the tibial side prosthesis can withstand, and the shear force generated by multiple flexion and extension activities of the knee joint Therefore, the thickness of the bone cement on the tibial side is very important. In total knee arthroplasty, the tibial plateau is an open oval plane, which is completely different from the proximal femur in hip arthroplasty. In hip replacement, the proximal femoral medullary cavity is a dis...

AI Technical Summary

Problems solved by technology

[0003] At present, the technical features of tibial bone cement in knee arthroplasty are as follows: fully expose the osteotomy surface of the proximal tibia, pulse flush the tibial plateau, thoroughly remove the fat and debris on the surface, and place the prepared bone cement on the proximal tibial cut surface. On the bone surface, apply the bone cement evenly, and apply a little bone cement on the underside of the tibial tray and the keel, and then blow it into the proximal tibia. Since the osteotomy surface of the proximal tibia is an open oval plane, it cannot be well The bone cement is pressed into the cancellous bone at the proximal end of the tibia, so that the amount of bone cement entering the tibial plateau is relatively small, so that the fixation of the tibial prosthesis and tibial plateau can withstand less shear force, and it is easy to loose early after surgery

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