Juvenile type osteoepiphysis-striding slidingly extending steel plate

Abstract

The invention discloses a juvenile type osteoepiphysis-striding slidingly extending steel plate. The juvenile type osteoepiphysis-striding slidingly extending steel plate comprises a first steel plate and a second steel plate, wherein the first steel plate is used for being fixed on the juvenile osteoepiphysis part; the second steel plate is used for being fixed on the juvenile bone part; a first conical threaded hole, which is used for being matched with a locking screw to lock and fix the first steel plate on the juvenile osteoepiphysis part, is formed on the first steel plate; a second conical threaded hole, which is used for being matched with the locking screw to lock and fix the second steel plate on the juvenile bone part, is formed on the second steel plate; a sliding mechanism is arranged between the two steel plates; and a through hole is formed on the first steel plate and the locking screw can pass through the through hole to be used on the second conical threaded hole of the second steel plate below the first steel plate, so that the second steel plate is fixed. The juvenile type osteoepiphysis-striding slidingly extending steel plate is applied to patients with osteoepiphysis fracture of the juvenile femoral condylar part with unclosed osteoepiphysis and fracture around the osteoepiphysis, so the fracture part can be effectively fixed, inhibition on bone longitudinal growth can be alleviated, and occurring rate of dysmelia after osteoepiphysis fracture of the juvenile femoral condylar part with unclosed osteoepiphysis and fracture around the osteoepiphysis is reduced. The juvenile type osteoepiphysis-striding slidingly extending steel plate has a good application prospect.

Description

technical field [0001] The invention relates to an orthopedic steel plate, in particular to a juvenile type trans-epiphyseal sliding extension steel plate. Background technique [0002] The habit of epiphyseal injury is also called epiphyseal injury. The epiphyseal plate is weaker than tendons, ligaments, and joint capsules in childhood, and the latter is 2 to 5 times stronger than the epiphyseal plate. Therefore, epiphyseal injuries in childhood are quite common. Children under the age of 16 Epiphyseal injuries account for 6%-30% of long bone fractures in children and adolescents. The epiphyseal plate is located between the epiphysis and the metaphysis, and has unidirectional cartilage proliferation and osteogenesis. It is the growth mechanism for the longitudinal development of the long bones of the limbs. Once the function is damaged, it will affect the bone development, resulting in limb shortening and joint deformity. 25 %-33% epiphyseal injury can lead to limb shorten...

AI Technical Summary

Problems solved by technology

Simple plaster fixation or bone traction use ligaments, tendons, and joint capsules to achieve fracture reduction. Although secondary damage to the epiphyseal plate caused by surgery can be avoided, it cannot meet the requirements for precise reduction of the epiphyseal plate, metaphysis, and articular surface. , prone to malunions, bone bridge formation, or traumatic arthritis

Screws, bone chip nails, and Kirschner wires are all fixed through the epiphyseal plate, and there is secondary damage to the epiphyseal plate, and the fixation is unreliable. If the diameter of the pin is too large, it may lead to bone growth inhibition

Although internal fixation with ordinary plates is relatively reliable, it has disadvantages such as hindering the longitudinal growth of bones. External fixation can easily cause pinhole infection and cannot automatically extend with the longitudinal growth of bones.

Therefore, there are obvious deficiencies in the traditional treatment of epiphysis and its surrounding fractures in adolescents, and it cannot solve the problem of effective fixation, while reducing the hindrance to the longitudinal growth of bones and the aggravation of deformities.

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