Posterior growth rod orthopedic device for scoliosis and kyphosis that can be actively expanded for children or adolescents

Abstract

The invention relates to a spine correcting device. The spine correcting device comprises a growing bar and a growing groove (5), wherein the growing bar comprises a first rod piece (2) and a second rod piece (2'); a free end of the first rod piece (2) and a free end of the second rod piece (2') can be inserted in two ends of the growing groove (5) slidably; and bidirectional memory alloy springs (7 and 7') and a container (6) positioned between the two bidirectional memory alloy springs (7 and 7') are arranged in the growing groove (5). By the correcting device with the growing bar, the spine of a patient can be expanded actively for a long time; when the correcting device does not need to be expanded actively, an expanding force can also be applied with the aid of the longitudinal growing capability of the spine of the patient and is kept owing to the characteristic that the growing groove can be expanded in one way; and the growing capability of the spine of the patient can be kept, and repeated open surgeries are avoided.

Description

technical field [0001] The invention relates to an orthopedic medical instrument, which is an internal fixation device used for scoliosis correction surgery for children or adolescents. Background technique [0002] Due to congenital malformations or abnormalities in the growth process, the human spine may have deformities such as scoliosis and kyphosis. For children or adolescents with scoliosis and kyphosis, orthopedic techniques mainly include fusion and non-fusion techniques, each with its own advantages and disadvantages. [0003] At present, the most commonly used kyphoscoliosis correction technology is to use the "nail or hook and rod system" composed of pedicle screws, pedicle hooks, laminar hooks and metal rods for posterior correction and fusion. The disadvantages of spinal orthopedic internal fixation and fusion technology for young patients mainly include: 1. It hinders the growth of the spine at the orthopedic segment; 2. It restricts the development of the tho...

AI Technical Summary

Problems solved by technology

The growing rod technology can be divided into two types. One is to make the head and tail connecting rods slide relative to each other with the help of external force through multiple operations, and then lock them with screws to maintain the orthopedic effect. Multiple operations within half a year may easily lead to adverse reactions such as infection, soft tissue defect, and spontaneous fusion of the spine; another type of technology can be classified as passive sliding technology, and the relative sliding between connecting rods is caused by the growth force of the spine itself. Provided that the connector that constrains the relative movement between the sliding rods on the coronal plane plays a role in controlling the aggravation of scoliosis. There are few public reports on the clinical application of this type of technology, which may be related to its limited orthopedic force

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