CN101828953A - Special apparatus for correcting scoliosis deformity in growth period - Google Patents

Abstract

Disclosed is a special instrument for orthopedic scoliosis deformity in growth stage, which is composed of growth adjustment rod, slidable pedicle screw and common pedicle screw. With the function of sliding to the distal end automatically with the growth of the spine, it does not affect the longitudinal growth and development of the spine, so that children can avoid the pain of repeated adjustment operations, and further improve the curative effect of posterior scoliosis surgery in the growing period.

Description

Special instruments for orthopedic scoliosis deformity in growing period

technical field

The invention relates to a medical device for orthopedic scoliosis correction, in particular to a special orthopedic device for scoliosis patients in growth period.

Background technique

At present, the application of posterior three-dimensional orthopedic fusion technology in the treatment of scoliosis has been widely carried out at home and abroad. The most commonly used orthopedic devices, such as: CDH, TSRH, Moss Miami, USS, etc., are mainly researched and designed for adult patients. For children or adolescent scoliosis patients in the growing period, in order to increase the height as much as possible, there is a method of using the above-mentioned devices plus a "growth regulating valve" in surgical treatment, but surgery needs to be performed every six months to one year Stretching is extended; at the same time, in cases where height growth is not emphasized, the posterior orthopedic fusion of scoliosis during the growth period still has the possibility of "crank phenomenon" leading to orthopedic failure. Therefore, in order to slightly affect the longitudinal growth and development of the spine, avoid the pain of repeated adjustment operations in children, and further improve the curative effect of posterior scoliosis surgery in the growing period, there is an urgent need for a method that can achieve the therapeutic purpose through one operation. At the same time, it is an orthopedic device that has little influence on the longitudinal growth and development of the spine of children. The present invention is developed based on this requirement.

Contents of the invention

The purpose of the present invention is to overcome the limitation of longitudinal growth of the spine after posterior orthopedic fusion for scoliosis in the growth period, and the "crank phenomenon" that leads to the failure of orthopedic surgery; at the same time, it avoids the addition of "growth regulating valve" non-fusion orthopedic In order to solve the deficiency of multiple surgical adjustments, a special device for orthopedic scoliosis deformity in growth stage can be achieved by one operation.

Further elaboration is provided by the following detailed descriptions and illustrations:

Technical solution of the present invention is:

(1) Design the "growth regulating rod". The shape of the "growth regulating rod" is that the lower 1/3 section is a vertebral cylinder planing design with a tapered diameter, and the ratio of the lower 1/3 to the end diameter is: 6:5 (or the diameter of the lower 1/3 segment of the "growth regulating rod" tapers by 1 mm).

(2) Design a slidable pedicle fixation screw used in conjunction with the "growth adjustment rod", and the screw and the "growth adjustment rod" are fixed by point contact.

(3) The matching use of "growth adjustment rod" and slidable pedicle fixation screws can correct the sequence of the spine while allowing the spine to grow longitudinally to the distal end, so as to meet the needs of scoliosis correction in the growing period.

The remarkable effect that the present invention has is as follows:

1. The slidable pedicle screw in the distal part of the internal fixation device can slide along the "growth adjustment rod" to the distal end with the growth of the children's spine, which has the effect of automatically extending the spine, thus avoiding the need to repeatedly adjust and extend the internal fixation device Operation.

2. The treatment of scoliosis has a comprehensive effect. It can correct scoliotic deformity at one time and maintain the three-dimensional physiological curvature of the spine.

3. Only local bone graft fusion in the upper segment of the scoliosis is required, minimally affecting the longitudinal growth of the spine at the surgical site, preventing shortness of the upper body and avoiding the occurrence of the "crank phenomenon" after posterior spinal fusion in the growing period.

4. The production cost is only 1/2 of that of ordinary foreign orthopedic devices, which can greatly reduce the economic burden of patients, and has high social and economic benefits.

Description of drawings

Fig. 1 is a schematic diagram of the appearance of a growth regulating rod of the present invention;

Fig. 2 is a schematic diagram of the appearance of the slidable pedicle screw of the present invention;

Fig. 3 is a schematic view of the appearance of a common pedicle screw of the present invention;

Fig. 4 is a schematic diagram of the installation of each component of the slidable pedicle screw of the present invention;

Fig. 5 is a schematic diagram of the application of the present invention.

Detailed ways:

As shown in Fig. 1, Fig. 2 and Fig. 3, the whole system of the present invention consists of a growth regulating rod (Fig. 1), a slidable pedicle screw (Fig. 2), and a common pedicle screw (Fig. 3). Wherein the slidable pedicle screw ( FIG. 2 ) is composed of the external fixation screw 1 shown in FIG. 4 , the fixation cap 2 , the internal fixation screw 3 and the slidable pedicle screw body 4 quarters. When in use, the tapering position of the lower third of the growth regulating rod (Fig. 1) is fixed with the internal fixation screw 3 through point contact, because the diameter of the lower third of the growth regulating rod (Fig. 1) gradually becomes thinner and smooth , after being fixed with the internal fixation screw 3, only the slidable pedicle screw (Fig. 2) is allowed to slide downward, so that the slidable pedicle screw (Fig. 2) can move distally with the growth of the spine, so that the It produces a good orthopedic effect without affecting the longitudinal growth and development of the children's spine.

In the present invention, all materials can be selected from titanium alloy materials, and of course other materials suitable for medical use can also be selected.

The application process of the special instrument for scoliosis deformity correction in the growth stage will be further described below in conjunction with FIG. 5 . Firstly, two pairs of slidable pedicle screws 9 are inserted into the pedicles 10 of the lower vertebral body of scoliosis respectively, and three (or two) pairs of ordinary pedicle screws 7 are respectively inserted into the upper vertebral body of scoliosis. Then the growth adjustment rod 5 is pre-bent to the physiological curvature 1 of the scoliotic segment spine to be corrected (note that the tapering lower segment should be bent very slightly or not); place the growth adjustment rod 5 , the tapered end is inserted below, and about 1/3 of the length is reserved for the longitudinal growth and development of the spine; the upper end of the growth adjustment rod 5 is fixed with the common pedicle screw 7 by surface contact, and the growth adjustment rod 5 and the lower end pass through the point The contact is fixed with 9 slideable pedicle screws. Then, the growth adjustment rod 5 is rotated from the convex side to the sagittal plane to correct the rod 6, and the expansion and locking operation is performed to correct the scoliosis.

Although the above description and accompanying drawings have shown and described the present invention in detail, similar technologies should also be considered the same as described, and are not limited to the described features. It should be understood that only the preferred embodiments are illustrated and described herein. All changes and improvements within the concept of the present invention are within the scope of protection.

Claims (4)

1. A special instrument for orthopedic scoliosis deformity in growth period, which is composed of growth adjustment rod, slidable pedicle screw and ordinary pedicle screw. 2. As claimed in claim 1, the special instrument for correcting scoliosis deformity in the growth period is characterized in that the shape of the "growth adjustment rod" is that the lower 1/3 section is a planed design of the vertebral cylinder with tapering diameter, and the lower 1/3 The ratio of the diameter of the center to the end is 6:5 (or the diameter of the lower 1/3 section of the "growth regulating rod" is tapered by 1mm). 3. As claimed in claim 1, the special instrument for deformity correction of scoliosis in growth period is characterized in that the slidable pedicle fixation screw is divided into quarters by the outer fixation screw, the fixation cap, the inner fixation screw and the slidable pedicle screw. department composition. 4. As claimed in claim 1, the special instrument for deformity correction of scoliosis in the growth period is characterized in that the slidable pedicle fixation screw and the "growth adjustment rod" adopt a point-contact fixation design, so that the slidable pedicle fixation screw can only Move towards the tapered distal end of the "growth regulator".

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