A spinal orthopedic implant for adolescents

Abstract

This invention discloses a spinal orthopedic implant for adolescents, comprising a spreading device and a fixing device. The spreading device includes a sleeve containing a spinous column that can move axially and rotate circumferentially. One end of the spinous column has a growth rod extending from the sleeve's opening, and the other end of the sleeve has a growth fixing rod. The sleeve has a side opening and a limiting chamber. A pawl passing through the side opening is rotatably connected within the limiting chamber. An elastic body is provided on the back of the pawl to ensure it fits tightly against the spinous column. The spinous column has multiple rows of ratchet teeth that extend axially and are arranged in a circular array around its axis. The end of the ratchet tooth facing the growth rod has an axial guide portion, and the left or right side of the ratchet tooth has a circumferential guide portion. The front end of the pawl has a conforming groove adapted to the spinous column, and the bottom of the conforming groove has a tooth groove. This orthopedic implant can reduce surgery time, maintain normal spinal mobility postoperatively, has excellent overall function, and is highly practical.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a spinal orthopedic implant for adolescents. Background Technology

[0002] The existing spinal correction systems for adolescents mainly include the following. The most common spinal correction device is the growth rod system. Growth rods have several drawbacks. In this technique, the vertebral bodies need to be fixed at both ends of the implant using pedicle screws. As the patient grows taller, the length of the growth rod needs to be adjusted surgically every six months to adapt to the patient's height. Its main disadvantages are that repeated surgeries can easily lead to infection, scarring, poor wound healing, and even spontaneous intervertebral fusion, resulting in growth rod treatment failure. The second method uses fusion surgery for spinal correction. After implanting the rod and screw, the recovery time is long, and the fixation results in loss of spinal mobility and may lead to long-term complications such as pain and arthritis. For adolescents, scoliosis seriously affects their physical and mental health. Correction through internal rod and screw implantation involves large surgical incisions, and as the patient grows older, the connecting rods and screws need to be re-fixed, increasing surgical risks. For complex scoliosis, the required surgery time is even longer. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spinal orthopedic implant for adolescents that can reduce the operation time and maintain normal spinal mobility after surgery.

[0004] To solve the above-mentioned technical problems, the present invention achieves its objective as follows: The present invention relates to a spinal orthopedic implant for adolescents, comprising a spreading device and a fixing device disposed at both ends of the spreading device. The spreading device includes a sleeve, within which is a spur column that can move along its axial direction and rotate around its circumference. One end of the spur column is provided with a growth rod extending out of the sleeve's opening, and the other end of the sleeve is provided with a growth fixing rod. The sleeve has a side opening, and a limiting chamber that covers the side opening is provided on the sleeve. A pawl that passes through the side opening is rotatably connected within the limiting chamber. An elastic body is provided on the back side of the pawl to make it fit tightly against the spur column. The spur column is provided with multiple rows of ratchet teeth that extend along its axial direction and are arranged in a circular array around its axis. The end of the ratchet tooth facing the growth rod has an axial guide portion, and the left or right side of the ratchet tooth has a circumferential guide portion. The front end of the pawl has a contour groove that adapts to the spur column, and the bottom of the contour groove has a tooth groove for the ratchet teeth to be inserted.

[0005] The present invention is further configured such that the included angle between adjacent rows of ratchet teeth is equal.

[0006] The present invention is further configured such that the spacing between two adjacent ratchet teeth in the same column is equal.

[0007] The present invention is further configured such that the elastic body is a compression spring.

[0008] The present invention is further configured such that: the fixing device includes a first spherical movable hole opened on the growth movable rod and the growth fixing rod, both ends of the first spherical movable hole are connected to the outside, a first universal rotating ball is slidably connected in the first spherical movable hole, the first universal rotating ball is provided with a stud part extending out of one end of the first spherical movable hole and a first pedicle screw extending out of the other end of the first spherical movable hole, and a locking nut is threaded on the stud part.

[0009] The invention is further configured such that: the fixing device includes a second spherical movable hole formed on the growth movable rod and the growth fixed rod, both ends of the second spherical movable hole being connected to the outside; a second universal rotating bead is slidably connected inside the second spherical movable hole; the fixing device also includes a follower bracket passing through the two end openings of the second spherical movable hole and connected to the second universal rotating bead; the follower bracket is provided with an extension rod; the extension rod is provided with at least one second pedicle screw; the second pedicle screw includes a screw body and a tail seat; the tail seat is provided with a slot with both ends connected to the outside; the extension rod is inserted into the slot; and a set screw is threadedly connected to the slot, the end of which abuts against the extension rod and prevents it from moving laterally within the slot.

[0010] In summary, the present invention has the following beneficial effects:

[0011] This invention relates to a spinal orthopedic implant for adolescents. This orthopedic implant can treat spinal diseases involving lateral and transverse rotation in the coronal plane, and also has an adjusting function in the axial and circumferential directions. It is mainly used for adolescent patients with scoliosis and spinal rotation. Surgically, two pedicle screws are fixed to the posterior side of the spine on the concave side of the spinal curvature, thereby achieving fixation and acting as an internal support structure to correct spinal deformities. After surgical implantation, the internal support structure expands and rotates through stretching and spinal torsion. This system provides an effective solution for complex spinal diseases. The system has an automatic adjustment feature, allowing for normal postoperative activity. After implantation, the system can be used for exercise to restore lateral curvature and rotation, achieving spinal orthopedic function. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 This is a schematic diagram illustrating the overall structure of the spreading device of the present invention;

[0014] Figure 3This is a partial structural schematic diagram illustrating the spreading device of the present invention;

[0015] Figure 4 yes Figure 3 Enlarged structural diagram of section A in the middle;

[0016] Figure 5 This is a schematic diagram illustrating the structure of the ratchet in this invention;

[0017] Figure 6 This is a schematic diagram illustrating the structure of the ratchet pawl in this invention;

[0018] Figure 7 This is a structural schematic diagram illustrating the fixing device of the present invention;

[0019] Figure 8 This is another structural schematic diagram illustrating the fixing device of the present invention;

[0020] Figure 9 This is a schematic diagram of the implantation state of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that these descriptions are merely for further illustrating the features and advantages of the present invention, and not for limiting the scope of the patent claims of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0023] Example 1

[0024] See Figures 1 to 7 , Figure 9As shown, this embodiment involves a spinal orthopedic implant for adolescents, including a spreading device and fixing devices at both ends of the spreading device. The spreading device includes a sleeve 1, inside which is a spindle 2 that can move along its axial direction and rotate around its circumference. One end of the spindle 2 is provided with a growth rod 3 extending out of the opening of one end of the sleeve 1, and the other end of the sleeve 1 is provided with a growth fixing rod 4. The sleeve 1 has a side opening 5, and the sleeve 1 has a limiting chamber 6 that covers the side opening. The 6 is rotatably connected to a pawl 7 that passes through the side opening. The back side of the pawl 7 is provided with an elastic body 8 that makes it fit tightly against the ratchet post. The ratchet post 2 is provided with multiple rows of ratchet teeth 9 that extend along its axial direction and are arranged in a ring array around its axis. The end of the ratchet tooth 9 facing the growth rod has an axial guide portion 10. The left or right side of the ratchet tooth 9 has a circumferential guide portion 11. The front end of the pawl 7 has a contour groove 12 that adapts to the ratchet post. The bottom of the contour groove 12 has a tooth groove 13 for the ratchet tooth to be inserted.

[0025] Furthermore, the included angle between adjacent rows of ratchet teeth 9 is equal.

[0026] Furthermore, the spacing between two adjacent ratchet teeth 9 in the same column is equal.

[0027] Furthermore, the elastic body 8 is a compression spring.

[0028] Furthermore, the fixing device includes a first spherical movable hole 14 opened on the growth movable rod and the growth fixed rod. Both ends of the first spherical movable hole 14 are connected to the outside. A first universal rotating ball 15 is slidably connected in the first spherical movable hole 14. The first universal rotating ball 15 is provided with a stud part 16 extending out of one end of the first spherical movable hole and a first pedicle screw 17 extending out of the other end of the first spherical movable hole. A locking nut 18 is threadedly connected to the stud part 16.

[0029] Example 2

[0030] See Figures 1 to 6 , Figure 8 and Figure 9As shown, this embodiment involves a spinal orthopedic implant for adolescents, including a spreading device and fixing devices at both ends of the spreading device. The spreading device includes a sleeve 1, inside which is a spindle 2 that can move along its axial direction and rotate around its circumference. One end of the spindle 2 is provided with a growth rod 3 extending out of the opening of one end of the sleeve 1, and the other end of the sleeve 1 is provided with a growth fixing rod 4. The sleeve 1 has a side opening 5, and the sleeve 1 has a limiting chamber 6 that covers the side opening. The 6 is rotatably connected to a pawl 7 that passes through the side opening. The back side of the pawl 7 is provided with an elastic body 8 that makes it fit tightly against the ratchet post. The ratchet post 2 is provided with multiple rows of ratchet teeth 9 that extend along its axial direction and are arranged in a ring array around its axis. The end of the ratchet tooth 9 facing the growth rod has an axial guide portion 10. The left or right side of the ratchet tooth 9 has a circumferential guide portion 11. The front end of the pawl 7 has a contour groove 12 that adapts to the ratchet post. The bottom of the contour groove 12 has a tooth groove 13 for the ratchet tooth to be inserted.

[0031] Furthermore, the included angle between adjacent rows of ratchet teeth 9 is equal.

[0032] Furthermore, the spacing between two adjacent ratchet teeth 9 in the same column is equal.

[0033] Furthermore, the elastic body 8 is a compression spring.

[0034] Furthermore, the fixing device includes a second spherical movable hole 19 opened on the growth movable rod and the growth fixed rod. Both ends of the second spherical movable hole 19 are connected to the outside. A second universal rotating ball 20 is slidably connected in the second spherical movable hole. The fixing device also includes a follower bracket 21 that passes through the two ends of the second spherical movable hole and is connected to the second universal rotating ball. The follower bracket 21 is provided with an extension rod 22. The extension rod 22 is provided with at least one second pedicle screw. The second pedicle screw includes a screw body 23 and a tail seat 24. The tail seat 24 is provided with a slot 25 that is connected to the outside at both ends. The extension rod 22 is inserted into the slot 25. A set screw 26 is threadedly connected to the slot 25, the end of which abuts against the extension rod and prevents it from moving laterally in the slot.

[0035] In this embodiment, the spring tension causes the front end of the pawl 7 to engage between two rows of ratchet teeth 9, and also between two ratchet teeth 9 in one row of ratchet teeth 9, forming a bidirectional limiting in both the axial and circumferential directions. Because one side of the ratchet tooth 9 has a circumferential guide portion 11, the ratchet post 2 can rotate unidirectionally in either a clockwise or counterclockwise direction; because the end of the ratchet tooth 9 facing the growth rod has an axial guide portion 10, the ratchet post 2 can slide unidirectionally in the axial direction.

[0036] This invention relates to a spinal orthopedic implant for adolescents. This orthopedic implant can treat spinal diseases involving rotation in the coronal and transverse planes, and also has an adjusting function in the axial and circumferential directions. It is mainly used for adolescent patients with scoliosis and spinal rotation. Surgically, two pedicle screws are fixed to the posterior side of the spine on the concave side of the spinal curvature, thus achieving fixation and acting as an internal support structure to correct spinal deformities. After surgical implantation, the internal support structure expands and rotates through stretching and spinal torsion. This system provides an effective solution for complex spinal diseases. The system has an automatic adjustment feature, allowing for normal postoperative activity. After implantation, the system helps restore lateral curvature and rotation through exercise, achieving spinal orthopedic function. Overall, it has comprehensive functions and strong practicality.

[0037] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0038] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A spinal orthopedic implant for adolescents, comprising a spreading device and a fixing device disposed at both ends of the spreading device, characterized in that: The spreading device includes a sleeve, inside which is a ratchet column that can move along its axial direction and rotate around its circumference. One end of the ratchet column has a growth rod extending out of the sleeve's opening, and the other end of the sleeve has a growth fixing rod. The sleeve has a side opening, and a limiting chamber that covers the side opening is provided on the sleeve. A pawl that passes through the side opening is rotatably connected in the limiting chamber. An elastic body is provided on the back side of the pawl to make it fit tightly against the ratchet column. The ratchet column has multiple rows of ratchet teeth that extend along its axial direction and are arranged in a circular array around its axis. The end of the ratchet tooth facing the growth rod has an axial guide portion, and the left or right side of the ratchet tooth has a circumferential guide portion. The front end of the pawl has a contour groove that adapts to the ratchet column, and the bottom of the contour groove has a tooth groove for the ratchet teeth to be inserted.

2. The spinal orthopedic implant for adolescents according to claim 1, characterized in that: The included angle between the ratchet teeth in two adjacent columns is equal.

3. The spinal orthopedic implant for adolescents according to claim 2, characterized in that: The spacing between two adjacent ratchet teeth in the same column is equal.

4. The spinal orthopedic implant for adolescents according to claim 3, characterized in that: The elastic body is a compression spring.

5. The spinal orthopedic implant for adolescents according to any one of claims 1-4, characterized in that: The fixing device includes a first spherical movable hole formed on the growth movable rod and the growth fixing rod. Both ends of the first spherical movable hole are connected to the outside. A first universal rotating ball is slidably connected in the first spherical movable hole. The first universal rotating ball is provided with a stud part extending out of one end of the first spherical movable hole and a first pedicle screw extending out of the other end of the first spherical movable hole. A locking nut is threaded on the stud part.

6. The spinal orthopedic implant for adolescents according to any one of claims 1-4, characterized in that: The fixing device includes a second spherical movable hole formed on the growth rod and the growth fixing rod. Both ends of the second spherical movable hole are connected to the outside. A second universal rotating ball is slidably connected in the second spherical movable hole. The fixing device also includes a follower bracket that passes through the two ends of the second spherical movable hole and is connected to the second universal rotating ball. The follower bracket is provided with an extension rod. The extension rod is provided with at least one second pedicle screw. The second pedicle screw includes a screw body and a tail seat. The tail seat is provided with a slot that is connected to the outside at both ends. The extension rod is inserted into the slot. A set screw is threaded on the slot, the end of which abuts against the extension rod and prevents it from moving laterally in the slot.

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