Scoliosis Screw Rod Correction Bracket System

Abstract

A scoliosis screw rod correction bracket system, comprising a pedicle screw, a longitudinal connecting rod, a puncture cone, a guide needle, a guide wire, an expansion core, a screw-setting guide sleeve, a hollow flat process file, a hollow wire tap, and an upper nail Pedicle screw includes screw body, screw seat, two breakable long arms, The screw plug and cap, the two breakable long arms are connected to the nail base to form a U-shaped structure, the breakable long arm is provided with a concave notch, and the concave notch divides the breakable long arm into a broken arm and a short arm. The outer surface of the short arm of the breakable long arm is provided with an external thread, and the cap is used to be sleeved on one end of the short arms of the two breakable long arms near the concave notch and is provided with an internal thread that matches the external thread of the short arm. Has a cap hole. The scoliosis screw-rod correction bracket system is flexible, simple, fast, labor-saving, and has high accuracy, stability and reliability for placing the screw-rod correction bracket.

Description

technical field [0001] The invention relates to the technical field of orthopedic surgery medical instruments, in particular to a scoliosis screw rod correction bracket system. Background technique [0002] Scoliosis refers to the scoliosis and rotational deformity of the spine, which are divided into infantile type (0-3 years old), juvenile type (4-10 years old), and adolescent type (above 10 years old), which seriously affect the health and safety of children. mental health. Adolescent patients with severe scoliosis can undergo orthopaedic fusion surgery, which has relatively little impact on their spinal development and cardiopulmonary. With the increase of age, the spinal deformity from childhood to adolescence is very serious, the operation is difficult, the trauma is large, and there are many complications. Spinal deformities in childhood are flexible and easy to correct. For children with scoliosis at a young age, orthopaedic fusion surgery obviously affects the de...

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

Images