Novel head marrow nail capable of preventing head and neck bone blocks from tilting backward

Abstract

The invention discloses a novel head marrow nail capable of preventing head and neck bone blocks from tilting backward, and belongs to the technical field of medical fracture reduction instruments. The head marrow nail with a device for preventing head and neck bone blocks from tilting back includes a main rod, a main nail and an anti-backward screw; the main rod is used for being inserted in thefemoral shaft of a patient; the first end of the main nail penetrates and is connected to the main rod, and the second end of the main nail penetrates and fixes the fracture blocks of the femoral neckand femoral head; and the first end of the anti-backward screw penetrates the main rod, and the second end of the anti-backward screw penetrates in femoral neck marrow to reach the posterior edge ofthe anterior cortex of the femoral neck. Thus, the problems, that cortical counterpoint is easy to lose and the healing rate of cortical support reduction to fracture is low during the process that postoperative sliding obtains secondary stability by adopting the structure that uses the main rod to penetrate the femoral shaft and uses the main nail to penetrate the femoral neck and femoral head, can be solved. The second end of the anti-backward screw penetrates in the femoral neck marrow to directly reach the posterior edge of the anterior cortex of the femoral neck, so that the blocking effects of preventing the cervical cortex of the head and neck bone blocks from tilting, falling, and moving backward can be achieved.

Description

technical field [0001] The invention relates to the technical field of medical fracture reduction instruments, in particular to a new type of intramedullary nail for preventing retroversion of head and neck bone fragments. Background technique [0002] my country is a country with a large aging population, especially the number of elderly people over the age of 80 is increasing rapidly. In 2013, the number of elderly hip fractures in my country was about 700,000, and it is expected to increase to 4 million in 2040. Intertrochanteric fractures account for about half of hip fractures in the elderly, most commonly occur in women, and falls in daily life and osteoporosis are the underlying causes. [0003] At present, for intertrochanteric fractures in the elderly, early closed reduction and intramedullary nail fixation are advocated. Clinical experience has shown that the quality of fracture reduction is the most important prerequisite factor affecting the effect of internal ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new type of intramedullary nail for preventing head and neck bone retroversion, to solve the existing problems in the prior art, the main rod is used to penetrate the femoral shaft, and the main nail is penetrated through the structure of the femoral neck and femoral head. In the process of post-sliding to obtain secondary stability, cortical alignment is easily lost, and the technical problem of cortical support reduction to fracture healing rate is low

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