Knee joint bone surface replacement device

Abstract

The invention discloses a knee joint bone surface replacement device. The knee joint bone surface replacement device comprises a detector, wherein a bone cutting device is arranged on the detector, and a measurer is arranged on the bone cutting device. The knee joint bone surface replacement device is simple in structure and high in accuracy rate, a posterior condyle plate is additionally arranged on the detector on the existing basis, so that a gap detector can be clamped in a gap between the tibia and the femur in a more fitting manner, a straightening gap corresponds to a flexion gap obtained through the bone cutting device, so that the shaking of the femur is avoided, and the accuracy of the femur cutting is improved; other bone cutting devices with different sizes are saved, the cutting operation of the femurs with different sizes can be realized, and the operation efficiency is improved; a moving body at the top of the existing bone cutting device is separated and is combined with a pointer, the sizes of the front diameter and the rear diameter of the femur are measured through the pointer, and meanwhile, the position of the moving body is adjusted, so that the size of the femur cut by a first section on the moving body is completely matched with an artificial joint prosthesis, and the operation success rate and the operation efficiency are improved.

Description

technical field [0001] The invention relates to a knee joint bone surface replacement device, which belongs to the technical field of medical equipment. Background technique [0002] Knee osteoarthritis is a common and frequently-occurring disease. Among the elderly people over 65 years old, more than 50% suffer from it. Knee joint surface replacement is the ultimate effective method for treating knee osteoarthritis. Those necrotic or worn femurs 1 connected by face 3 are resected, as figure 1 As shown, and the artificial joint prosthesis 2 is installed, so that the patient can stand up again and walk normally. [0003] During the surface replacement operation of the knee joint, the balance between the extension gap and the flexion gap is the key to the operation, and the priority of the extension gap is the most commonly used and effective method for osteotomy. At present, the operation of orthopedic surgeons is: first cut off the distal end of femur 1 ( image 3 First c...

AI Technical Summary

Problems solved by technology

[0005] After the straightening gap is determined, when determining the flexion gap using the existing anterior reference or posterior reference measurer, the doctor will determine the position of the second cut plane 1-5 by visual observation and through his own experience. There is no positioning device below, and the gap between the two sides of the femur 1 and the tibia 4 on the knee joint of different people is different. Therefore, it cannot be guaranteed that the gap between the two sides of the flexed femur 1 and the tibia 4 before the second cutting plane 1-5 is cut. Balance, so that the positioning position of the femoral osteotomy plate is not accurate, affecting the installation of artificial joint prosthesis after surgery, and the problem that patients may not be able to restore normal function after installation

[0006] When using the current femoral osteotomy plates, doctors often need to choose different sizes of femoral osteotomy plates according to the size of the femur. time, increased surgical risk

[0007] When the current measuring device is in use, only the height of the osteotomy at the fifth section 1-1 is measured by the measuring device, so as to obtain what size artificial joint prosthesis 2 is used, if the measured size is the same as the artificial joint prosthesis If the size of the artificial joint prosthesis differs too much, it is necessary to re-cut the osteotomy and measure; if the measured size is between the size of two different artificial joint prosthesis, then only a small-sized artificial joint prosthesis can be used, but this small size The artificial joint prosthesis and the femur are not fully fitted, which may lead to restricted postoperative activities of the patient and accelerated wear of the prosthesis.

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