Fracture fixation device capable of realizing longitudinal dynamic sliding

Abstract

The invention provides a fracture fixation device capable of realizing longitudinal dynamic sliding. According to the fracture fixation device, slide rails are arranged on a strip steel plate, sliding chutes are arranged on block steel plates, and the block steel plates sleeve the slide rails of the strip steel plate through the sliding chutes, and can slide dynamically and longitudinally on the strip steel plate; screw holes are reserved in the block steel plates, and the threads of the screw holes are matched with those on the tail of screws so that the block steel plates and the screws are integrated into a whole; grooves are reserved on the strip steel plate, and the screws are screwed into the skeleton after sequentially passing through the screw holes in the block steel plates and the grooves in the strip steel plate, and can slide in the grooves of the strip steel plate. According to the fracture fixation device, the fixation is stable, the healing time is short, the dynamic pressing and extension adjustment are integrated into a whole, and the healing and growth of the diseased bone are promoted; the limiting sliding fixation technology is adopted, the fracture end can be pressed continuously in the healing process of the fracture, no stress shielding is generated, and the longitudinal mechanical stress and final motion can be conducted on the fracture end, therefore, the fracture healing is promoted, the difficulties that the skeletal development is limited and the fracture healing is slow in the traditional static fixation model are solved, the treatment and rehabilitation time of patients are shortened, the burden of the patients is alleviated, and the fracture fixation device belongs to an ideal matched fixation apparatus specially used for treating limb fracture.

Description

technical field [0001] The invention relates to a medical device, more specifically a built-in fixation device for orthopedic surgery, which can be longitudinally and dynamically slid to pressurize or extend and adjust, and is a vertically and dynamically slidable fracture fixation device for fracture reduction, fixation and rehabilitation. Background technique [0002] As we all know, after fractures, fractures, and broken bones in humans and animals, it is necessary to reset the fracture site first, and then fix it with a built-in steel plate or an external splint. The traditional built-in steel plate is designed as a whole piece, which is to fix the steel plate on the bone with screws, so that the steel plate and the bone are integrated and cannot move in all directions. At the same time, the longitudinal stress required in the fracture healing process is also reduced And blocking, which led to many adverse consequences: In adults, the fractured end surface cannot get mic...

AI Technical Summary

Problems solved by technology

[0004] 1. Unable to continuously pressurize the fracture end: the current internal fixation is static fixation, that is, after the fracture is reduced and fixed, the bone and the internal fixation are combined into a whole that cannot move, and it is impossible to generate continuous pressure by the patient standing or tapping the limb longitudinally. The stumps are pressurized, and the stump gaps remaining during the fracture reduction process and the stump gaps caused by the early bone resorption of the fracture repair will not be eliminated, resulting in the separation of the stumps, interruption of bone conduction, and affecting fracture healing.

[0005] 2. Stress shielding: because the internal fixation is fixed as a whole and is too hard, it shields the stress stimulation of the fracture end, so that fracture healing or bone growth lacks stress stimulation, resulting in delayed bone reconstruction and insufficient mechanical properties of the fracture end healing site. Clinically, serious problems such as secondary fractures easily occur after internal fixation removal

[0006] 3. Unable to transmit longitudinal mechanical stress to the fracture end: current research shows that longitudinal mechanical stimulation can induce fracture healing, which is an effective non-invasive way to assist in strengthening fracture healing

The existing internal fixation is static fixation, which cannot provide micro-movement for the fracture end and affects fracture healing

[0008] 5. Unable to extend with bone growth: For children and adolescents who are in the growth and development period, internal fixation should not limit the longitudinal growth of bones while maintaining fractures, otherwise it may lead to temporary or permanent growth inhibition, causing bilateral fractures in patients. The development of limbs is not equal, and the existing internal fixation devices cannot meet the needs of such patients

[0009] The current fracture fixation mode cannot meet the needs of patients for treatment and surgery. Therefore, it is urgent to develop a fracture fixation that can not only effectively fix the fracture site, but also help the bone heal and grow, and realize dynamic compression or extension adjustment. Mode to meet the actual clinical needs, to reduce the pain and economic burden of patients, increase social benefits

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