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Gradual distraction device used after tibial osteotomy and capable of maintaining inner-side cortex to be free of fracture

A technology of spreader and tibia, which is applied in the field of orthopedic medical devices, and achieves the effects of good effect, restoration of lower limb force line, and simple structure

Inactive Publication Date: 2018-07-27
THE THIRD HOSPITAL OF HEBEI MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the problem of how to protect the medial cortex from brittle fracture has not been solved, and it has become the key to breakthroughs that affect the use of bone plates, and it needs to be solved urgently

Method used

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  • Gradual distraction device used after tibial osteotomy and capable of maintaining inner-side cortex to be free of fracture
  • Gradual distraction device used after tibial osteotomy and capable of maintaining inner-side cortex to be free of fracture
  • Gradual distraction device used after tibial osteotomy and capable of maintaining inner-side cortex to be free of fracture

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Experimental program
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Embodiment Construction

[0026] The present invention consists of an upper spreader plate 1, a lower spreader plate 2, a spreader seat 3, a casing 4, a screw rod 5, a spreader connecting rod 6, a spreader plate rotating shaft 7, a pull rod rotating shaft 8, a connecting rod rotating shaft 9, a retainer Plate 19, turning handle 20 form.

[0027] figure 1 , 2 , 3, 4, 5, and 6 show that the upper expansion plate 1 and the lower expansion plate 2 are rectangular flat plates respectively, and the board surfaces of the upper expansion plate 1 and the lower expansion plate 2 are placed parallel to each other, and the upper expansion plate 1 and the lower expansion plate The front end of the rectangular length direction of the lower expansion plate 2 is connected by the expansion plate rotating shaft 7, and the upper expansion plate 1 and the lower expansion plate 2 can be opened around the two sides of the expansion plate rotating shaft 7, so that the osteotomy gap 22 is enlarged. Big.

[0028] figure 1 ...

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Abstract

The invention discloses a gradual distraction device used after tibial osteotomy and capable of maintaining inner-side cortex to be free of fracture and belongs to the technical field of orthopedic medical instruments. The gradual distraction device is used for distracting a gonitis tibial osteotomy position. The front ends of an upper distraction plate and a lower distraction plate are connectedby a distraction plate rotating shaft, the front end of a distraction seat is connected with the rear ends of the upper distraction plate and the lower distraction plate through connection rod rotating shafts, one end of a distraction connection rod is connected with a connection rod rotating shaft while the other end of the same is connected with a pull rod rotating shaft, the rear end of the distraction seat is connected with the front end of a sleeve, a thread is formed in the rear portion of the sleeve, a spiral pull rod is positioned in the sleeve, the front portion and the rear portion of the spiral pull rod are in rotatable connection, the front end of the spiral pull rod penetrates the distraction seat and is provided with a shaft hole, the pull rod rotating shaft and the shaft hole of the spiral pull rod are in rotating fit, and the rear portion of the spiral pull rod is provided with a thread matched with the thread in the rear portion of the sleeve. By the gradual distraction device, gradual and slow distraction can be implemented on an osteotomy gap during operation to maintain the inner-side cortex to be complete and free of fracture during operation.

Description

technical field [0001] The invention relates to a device for stretching the tibial osteotomy site of knee arthritis and keeping the inner cortex intact without breaking, and belongs to the technical field of orthopedic medical devices. Background technique [0002] Knee osteoarthritis is the most common joint disease in the elderly, and it is also the main cause of lower limb disability in the elderly, which seriously affects the daily activities and quality of life of the elderly. Knee osteoarthritis refers to a chronic bone and joint disease caused by cartilage degeneration and bone hyperplasia in the knee joint. Clinically, it is mainly manifested as knee joint pain and dysfunction of varying degrees, and some joint swelling and effusion , X-ray showed narrowing of the joint space, osteophyte formation at the joint margin, subchondral bone sclerosis and cystic degeneration. About 60% of people over the age of 55 have knee osteoarthritis on X-ray films, and 35%-50% of the...

Claims

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Application Information

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IPC IPC(8): A61B17/88
CPCA61B17/8852
Inventor 张英泽郑占乐王娟邢欣
Owner THE THIRD HOSPITAL OF HEBEI MEDICAL UNIV
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