Scoliosis screw-rod correction stent system

Abstract

The invention relates to a scoliosis screw-rod correction stent system. The scoliosis screw-rod correction stent system comprises a pedicle screw, a longitudinal connecting stick, a puncture cone, a guide pin, a guide wire, an expansion core, a screw placement guiding sleeve, a hollow potance file, a hollow screw tap, a nail loading device, a rod holding device, a plug screw holding device, a screwdriver, an unfolding pressurizer, an incision tissue retractor and an anti-torque socket spanner, wherein the pedicle screw comprises a screw body, a screw seat, two long arms which can be broken, aplug screw and a cap, the two long arms which can be broken are connected with the nail seat to form a U-shaped structure, a concave incisura is formed in each long arm which can be broken, the concave incisurae can divide the long arms which can be broken into broken arms and short arms, an external screw thread is formed on the outer surface of the short arm of each long arm which can be broken,the cap is used for being sheathed at one end, close to the concave incisurae, of the short arms of the long arms which can be broken and is provided with an internal screw thread matched with the external screw threads of the short arms, and the cap is provided with a cap holding hole. The scoliosis screw-rod correction stent system provided by the invention is flexible, simple and rapid in operation, labor is saved, and accuracy, stability and reliability of an embedded screw-rod correction stent are high.

Description

technical field [0001] The invention relates to the technical field of orthopedic surgery medical instruments, in particular to a scoliosis screw rod correction support system. Background technique [0002] Scoliosis refers to the scoliosis and rotational deformity of the spine. It is divided into infantile type (0-3 years old), juvenile type (4-10 years old), and adolescent type (over 10 years old). It seriously affects the health and mental health. Adolescent patients with severe scoliosis can undergo orthopedic fusion surgery, which has relatively little impact on their spine development and cardiopulmonary development. With the growth of age, the development of childhood to adolescence is very serious spinal deformity, the operation is difficult, the trauma is large, and there are many complications. Children's spinal deformity is soft and easy to correct. For young children with scoliosis, orthopedic fusion surgery significantly affects the development of the child's...

AI Technical Summary

Problems solved by technology

The clinical efficacy of spinal fusion technology in the treatment of scoliosis in mature populations is satisfactory, but in the treatment of scoliosis in growing children, there will be many problems and failures. "Phenomenon

In addition, premature fusion results in short upper body and affects the development of heart and lung functions, which is also unacceptable

The double-rod growing rod technology, which is still being promoted and applied in China, was once considered a good method, but its shortcomings have been reported at home and abroad in recent years: (1) Repeated operations are required (every 6 months on average); (2) Rod breakage Decoupling (or pulling out of the upper screw); (3) kyphotic deformity after the upper junction; (4) distraction failure; (5) complications such as spontaneous fusion are common; (6) higher infection rate, etc.

(3) The existing corrective devices at home and abroad cannot provide sufficient corrective stress on the top vertebra of the scoliosis

Its advantage is that it can avoid repeated surgical trauma to children, but it also has all the disadvantages of double-rod growth rods. It also cannot correct the lateral curvature immediately, and it is prone to nails and rods being pulled out, upper screws pulled out, unable to hold, Problems such as kyphosis at the proximal junction

[0004] To sum up, the current non-fusion techniques for scoliosis at home and abroad have the following four problems: (1) The asymmetric growth of the scoliotic spine cannot be controlled, and the scoliosis of sick children cannot be corrected immediately during surgery

(2) Pedicle screw “bolt” phenomenon exists on the concave side after operation, and the vertebral body cannot grow and extend freely along the direction of the correction rod, and the correction cannot be maintained without loss or loss during the entire growth and development period of the child, or even Let the scoliosis shape, further self-correction, need to do fusion surgery again after maturity

(3) The two ends of the growth rod are only fixed on the pedicle screws of the upper and lower vertebrae of scoliosis in the body, and the top vertebra and its adjacent upper and lower vertebrae are not fixed with pedicle screws. The effect of the lateral thrust to the concave side exerted by the apical vertebra and the compression and fixation on the convex side of the apical vertebra inhibit the growth of the endplate

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