Scoliosis Orthopedic Devices

Abstract

The present invention provides a scoliosis correction device, comprising: a connecting sleeve assembly; a connecting rod movably inserted into the connecting sleeve assembly; a ratchet locking structure arranged between the connecting sleeve assembly and the connecting rod, the ratchet locking structure comprising a matching tooth and a locking tooth abutting against the matching tooth, the matching tooth comprising a plurality of tooth portions, one of the matching tooth and the locking tooth being arranged on the connecting sleeve assembly, and the other being arranged on the connecting rod, wherein when the locking tooth is engaged with different tooth portions, the connecting rod is in different locking positions relative to the connecting sleeve assembly; a first screw inserted into the connecting sleeve assembly; and a second screw inserted into the connecting rod. The technical solution of the present application effectively solves the problem in the related art that a long segment in multi-segment vertebral fusion is fixed with a plurality of screws, resulting in limited movement.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a scoliosis correction device. Background Art

[0002] Adolescent idiopathic scoliosis (AIS) refers to the structural scoliosis of the spine that occurs during adolescence without other organic diseases. It is the most common scoliosis deformity. The scoliosis angle of AIS patients on the coronal plane is greater than 10°. As the natural course of the disease progresses rapidly, the scoliosis angle increases and the appearance of the spine and thorax deformities occurs, affecting heart and lung function, causing serious harm to the physical and mental health of the children, and at the same time bringing a serious burden to the children's families and society.

[0003] There are many methods for treating AIS, which can be summarized as non-surgical treatment and surgical treatment. Non-surgical treatment is suitable for children with early diagnosis, mild degree, and low risk of curve progression. Children with AIS who have a Cobb's angle greater than 40° and immature bone development, those who are ineffective with conservative treatment (medial curve progression of more than 5° in half a year), those with thoracolumbar kyphosis or lumbar kyphosis with obvious appearance deformity, and those with low back pain need surgical treatment.

[0004] Scoliosis surgery is the most serious surgery for spinal injury. The general surgery is to fuse multiple vertebrae together with multiple screws, resulting in permanent loss of spinal mobility. In the surgery of fusing multiple vertebrae together with multiple screws, there are a lot of blood loss, neurological deficits including spinal cord injury, late infection, pseudoarthrosis, spinal pain and intervertebral disc degeneration. The use of multiple screws to fix the long segments in multi-segment vertebral fusion restricts movement. Summary of the invention

[0005] The main purpose of the present invention is to provide a scoliosis correction device to solve the problem in the related art that a long segment in multi-segment vertebral fusion is fixed with multiple screws, resulting in limited movement.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a scoliosis correction device, comprising: a connecting sleeve assembly; a connecting rod, which is movably inserted into the connecting sleeve assembly; a ratchet locking structure, which is arranged between the connecting sleeve assembly and the connecting rod, and the ratchet locking structure includes a mating tooth and a locking tooth abutting against the mating tooth, the mating tooth includes a plurality of tooth portions, one of the mating tooth and the locking tooth is arranged on the connecting sleeve assembly, and the other is arranged on the connecting rod, wherein when the locking tooth cooperates with different tooth portions, the connecting rod is in different locking positions relative to the connecting sleeve assembly; a first screw, which is inserted into the connecting sleeve assembly; and a second screw, which is inserted into the connecting rod.

[0007] Furthermore, the connecting sleeve assembly includes a connecting sleeve, a swinging member and an elastic reset member. The connecting rod is movably inserted into the connecting sleeve. A accommodating cavity is provided on the connecting sleeve. The accommodating cavity is connected to the inner hole of the connecting sleeve to form an installation space. The swinging member is pivotally located in the installation space. The first end of the connecting rod extends into the installation space. One of the mating tooth and the locking tooth is provided on the first end of the connecting rod, and the other is provided on the swinging member. The second screw is inserted into the second end of the connecting rod. The elastic reset member can apply elastic force to the swinging member to make the locking tooth and the mating tooth abut and cooperate.

[0008] Furthermore, the elastic reset member is a spring sheet arranged on the swing member, a deformation gap is provided between the spring sheet and the swing member, the spring sheet cooperates with the cavity wall of the accommodating cavity, the matching tooth is arranged on the first end of the connecting rod, and the locking tooth is arranged on the swing member.

[0009] Furthermore, the connecting sleeve assembly also includes a pivot shaft and a limit pin, the pivot shaft passes through the swinging member and is fixed on the bottom cavity wall of the accommodating cavity, the limit pin is fixed on the bottom cavity wall of the accommodating cavity, the spring sheet includes a fixed end and a free end, the fixed end is connected to the swinging member, and the free end is located between the limit pin and the side cavity wall of the accommodating cavity.

[0010] Furthermore, a first guide surface is provided on the hole wall of the inner hole of the connecting sleeve, and a second guide surface matching the first guide surface is provided on the side wall of the connecting rod.

[0011] Further, the locking tooth includes a first inclined portion and a first plane portion connected to the first inclined portion, the first inclined portion is inclined relative to the axis of the connecting rod, and the first plane portion is perpendicular to the axis of the connecting rod.

[0012] Furthermore, each tooth portion includes a second inclined portion and a second planar portion connected to the second inclined portion, the second inclined portion is inclined relative to the axis of the connecting rod, the second planar portion is perpendicular to the axis of the connecting rod, and the second planar portion can contact and cooperate with the first planar portion.

[0013] Furthermore, the first screw is movably inserted into the connecting sleeve assembly through the first metal bead, and the second screw is movably inserted into the connecting rod through the second metal bead.

[0014] Furthermore, the first metal bead is provided with a first avoidance hole for the first screw to pass through, the connecting sleeve assembly is formed with a first spherical hole in contact with the outer surface of the first metal bead, the second metal bead is provided with a second avoidance hole for the second screw to pass through, and the connecting rod is formed with a second spherical hole in contact with the outer surface of the second metal bead.

[0015] Furthermore, the first screw and the second screw each include a screw segment, a washer segment, a prism segment, a rod segment and a threaded segment, the prism segment supports the first metal bead or the second metal bead, the rod segment cooperates with the first avoidance hole or the second avoidance hole, and the scoliosis correction device also includes a nut that cooperates with the threaded segment; the surface of the rod segment, the surface of the first metal bead, the surface of the second metal bead, the surface of the first spherical hole, the surface of the second spherical hole, the surface of the connecting rod and the surface of the inner hole of the connecting sleeve assembly are all provided with a friction-reducing layer; the connecting sleeve assembly includes a connecting sleeve, and a accommodating cavity is provided on the connecting sleeve, and the scoliosis correction device also includes a cover provided at the opening of the accommodating cavity.

[0016] Applying the technical solution of the present invention, the scoliosis correction device includes: a connecting sleeve assembly, a connecting rod, a ratchet locking structure, a first screw and a second screw. The connecting rod is movably inserted into the connecting sleeve assembly. The ratchet locking structure is arranged between the connecting sleeve assembly and the connecting rod, and the ratchet locking structure includes a matching tooth and a locking tooth that abuts and cooperates with the matching tooth. The matching tooth includes a plurality of tooth portions, and one of the matching tooth and the locking tooth is arranged on the connecting sleeve assembly, and the other is arranged on the connecting rod. In the present application, when the locking tooth cooperates with different tooth portions, the connecting rod is in different locking positions relative to the connecting sleeve assembly. The first screw is inserted into the connecting sleeve assembly. The second screw is inserted into the connecting rod. The first screw and the second screw are respectively fixed on the vertebral body of the spine to be corrected, and when the segment to be corrected is periodically stretched out of the body, the scoliosis correction device changes with the segment to be corrected, and the locking tooth cooperates with different tooth portions. The connecting rod can be in different locking positions relative to the connecting sleeve assembly, so that the scoliosis correction device is extended as a whole. When no force is applied externally, the locking tooth cooperates with a tooth portion, the connecting rod is in a locked position, and the length of the scoliosis correction device remains unchanged, so that the scoliosis correction device props up the segment to be corrected, thereby achieving unilateral stable support and fixation, and correcting spinal deformities in adolescents and children. Furthermore, there is no need to use multiple screws to fuse multiple segment vertebrae in the related art, thus avoiding the problem of restricted movement caused by long segment fixation. Therefore, the technical solution of the present application effectively solves the problem of restricted movement caused by using multiple screws to fix long segments in multi-segment vertebrae fusion in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram showing a spinal column correction according to an embodiment of the scoliosis correction device of the present invention;

[0019] Figure 2 Shows Figure 1A perspective schematic diagram of a scoliosis correction device after spinal correction;

[0020] Figure 3 Shows Figure 1 A schematic diagram of a three-dimensional structure of a scoliosis correction device at a first angle;

[0021] Figure 4 Shows Figure 1 A schematic diagram of a three-dimensional structure of a scoliosis correction device at a second angle;

[0022] Figure 5 Shows Figure 4 An enlarged schematic diagram of the scoliosis correction device at point A;

[0023] Figure 6 Shows Figure 1 A schematic diagram of the exploded structure of the scoliosis correction device; and

[0024] Figure 7 Shows Figure 1 Schematic diagram of the three-dimensional structure of the scoliosis correction device in which the swinging part and the spring piece are connected together.

[0025] The above drawings include the following reference numerals:

[0026] 1. Spine; 10. Connecting sleeve assembly; 11. Connecting sleeve; 111. First guide surface; 121. Swinging member; 122. Spring piece; 123. Fixed end; 124. Free end; 13. Accommodating chamber; 14. Pivot shaft; 15. Stop pin; 16. First spherical hole; 20. Connecting rod; 21. Second guide surface; 22. Second spherical hole; 30. First screw; 31. Screw section; 32. Washer section; 33. Prism section; 34. Rod section; 35. Threaded section; 40. Second screw; 71. First metal bead; 711. First avoidance hole; 72. Second metal bead; 721. Second avoidance hole; 81. Tooth section; 811. Second inclined section; 812. Second planar section; 82. Locking tooth; 821. First inclined section; 822. First planar section. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0030] like Figures 1 to 5 As shown, the scoliosis correction device of this embodiment includes: a connecting sleeve assembly 10, a connecting rod 20, a ratchet locking structure, a first screw 30 and a second screw 40. The connecting rod 20 is movably inserted into the connecting sleeve assembly 10. The ratchet locking structure is arranged between the connecting sleeve assembly 10 and the connecting rod 20, and the ratchet locking structure includes a matching tooth and a locking tooth 82 that abuts against the matching tooth. The matching tooth includes a plurality of tooth portions 81, and one of the matching tooth and the locking tooth is arranged on the connecting sleeve assembly 10, and the other is arranged on the connecting rod 20. In the present application, when the locking tooth 82 cooperates with different tooth portions 81, the connecting rod 20 is in different locking positions relative to the connecting sleeve assembly 10. The first screw 30 is inserted into the connecting sleeve assembly 10. The second screw 40 is inserted into the connecting rod 20.

[0031] The technical solution of this embodiment is applied, and the first screw 30 is inserted into the connecting sleeve assembly 10. The second screw 40 is inserted into the connecting rod 20. The first screw 30 and the second screw 40 are respectively fixed on the vertebral body of the spine 1 to be corrected. When the segment to be corrected is regularly stretched in vitro, the scoliosis correction device changes with the segment to be corrected, and the locking teeth 82 cooperate with different tooth portions 81. The connecting rod 20 can be in different locking positions relative to the connecting sleeve assembly 10, so that the scoliosis correction device is extended as a whole. When no correction force is applied to the vertebral body of the spine 1 in vitro, the locking teeth 82 cooperate with a tooth portion 81, the connecting rod 20 is in a locked position, and the length of the scoliosis correction device remains unchanged, so that the scoliosis correction device stretches the segment to be corrected, thereby achieving unilateral stable support and fixation, and realizing spinal deformity correction of adolescents and children. Furthermore, there is no need to use multiple screws in the related art to fuse multiple segment vertebrae, avoiding the problem of limited movement caused by long segment fixation. Therefore, the technical solution of this embodiment effectively solves the problem in the related art of using multiple screws to fix the long segment in multi-segment vertebral fusion, resulting in restricted movement.

[0032] like Figure 1 and Figure 4 As shown, the connecting sleeve assembly 10 includes a connecting sleeve 11, a swinging member 121 and an elastic reset member. The connecting rod 20 is movably inserted into the connecting sleeve 11, and a receiving chamber 13 is provided on the connecting sleeve 11. The receiving chamber 13 is connected to the inner hole of the connecting sleeve 11 and forms an installation space, and the swinging member 121 is pivotally located in the installation space. The installation space makes the connecting sleeve assembly 10 compact on the one hand, and the installation space makes the receiving chamber 13 directly connected to the inner hole of the connecting sleeve 11, so that the locking tooth 82 is easy to cooperate with different tooth portions 81. The first end of the connecting rod 20 extends into the installation space, the locking tooth 82 is provided on the first end of the connecting rod 20, the locking tooth 82 is provided on the swinging member 121, the second screw 40 is inserted into the second end of the connecting rod 20, and the elastic reset member can apply elastic force to the swinging member 121 to make the locking tooth 82 abut and cooperate with the matching tooth. The provision of the elastic reset member enables the swing member 121 to always exert force in a direction close to the connecting rod 20 under the action of the elastic force, so that the locking tooth 82 and the matching tooth can be reliably matched.

[0033] It should be noted that before scoliosis correction, the locking tooth 82 is located in the tooth portion 81 at 3 / 4 of the height of the connecting rod 20. Regular in vitro distraction of the segment to be corrected means that the scoliotic vertebrae are stretched by a traction machine every three months in vitro, and the scoliosis correction device is extended with the height of the stretched vertebrae. When it is adjusted to a suitable distraction height according to its own situation, the traction machine does not pull the scoliotic vertebrae, and the locking tooth 82 in the scoliosis correction device cooperates with a tooth portion 81 to keep the connecting rod 20 in a locked position.

[0034] Of course, in other embodiments not shown in the figures, the locking tooth is arranged on the first end of the connecting rod, and the matching tooth is arranged on the swinging member.

[0035] like Figures 4 to 6 As shown, the elastic reset member is a spring sheet 122 disposed on the swing member 121, and a deformation gap is provided between the spring sheet 122 and the swing member 121. The deformation gap allows the spring sheet 122 to have sufficient deformation space to effectively apply force to the swing member 121. The spring sheet 122 cooperates with the cavity wall of the accommodating cavity 13, the matching teeth are provided on the first end of the connecting rod 20, and the locking teeth 82 are provided on the swing member 121. The spring sheet 122 can realize rebound, so that the scoliosis correction device can realize expandable adjustment.

[0036] like Figure 4 , Figure 6 and Figure 7 As shown, the connecting sleeve assembly 10 also includes a pivot shaft 14 and a limit pin 15. The pivot shaft 14 is passed through the swinging member 121 and fixed on the bottom cavity wall of the accommodating cavity 13, and the limit pin 15 is fixed on the bottom cavity wall of the accommodating cavity 13. The setting of the pivot shaft 14 enables the swinging member 121 to pivot relative to the connecting sleeve 11. The spring piece 122 includes a fixed end 123 and a free end 124, the fixed end 123 is connected to the swinging member 121, and the free end 124 is located between the limit pin 15 and the side cavity wall of the accommodating cavity 13. A narrow gap is formed between the limit pin 15 and the side cavity wall of the accommodating cavity 13, and the free end 124 is effectively confined in the gap, which limits the swinging range of the free end 124 and provides lateral support for the free end 124. In this way, the free end 124 is limited by the side cavity wall of the accommodating cavity 13 and the limiting pin 15 , and the fixed end 123 is fixed on the swinging member 121 , so that the spring sheet 122 can always apply elastic force to the swinging member 121 .

[0037] like Figure 4 , Figure 6 and Figure 7 As shown, the swing member 121 has a first end and a second end, the fixed end 123 is located on the first end of the swing member 121, and the limit pin 15 is located on the second end of the swing member 121 away from the first end of the swing member 121. The locking tooth 82 and the fixed end 123 are both connected to the first end of the swing member 121, the pivot shaft is disposed at the second end of the swing member 121, and the spring 122 protrudes from the second end of the swing member 121.

[0038] like Figure 4 and Figure 6As shown, in this embodiment, the hole wall of the inner hole of the connecting sleeve 11 is provided with a first guide surface 111, and the side wall of the connecting rod 20 is provided with a second guide surface 21 that cooperates with the first guide surface 111. The first guide surface 111 and the second guide surface 21 cooperate to enable the connecting sleeve 11 and the connecting rod 20 to achieve plane limiting, thereby preventing the connecting sleeve 11 and the connecting rod 20 from relative rotation or lateral sliding.

[0039] like Figure 4 and Figure 5 As shown, the locking tooth 82 includes a first inclined portion 821 and a first plane portion 822 connected to the first inclined portion 821. The first inclined portion 821 is inclined relative to the axis of the connecting rod 20, and the first plane portion 822 is perpendicular to the axis of the connecting rod 20. The first plane portion 822 can be stuck in the tooth portion 81, so that the swinging member 121 can only move in one direction relative to the connecting rod 20, and the swinging member 121 cannot be retracted relative to the connecting rod 20, thereby achieving an anti-retraction effect.

[0040] like Figure 4 and Figure 5 As shown, in this embodiment, each tooth portion 81 includes a second inclined portion 811 and a second plane portion 812 connected to the second inclined portion 811, the second inclined portion 811 is inclined relative to the axis of the connecting rod 20, the second plane portion 812 is perpendicular to the axis of the connecting rod 20, and the second plane portion 812 can be in contact with the first plane portion 822. In this way, when the locking tooth 82 is in contact with one tooth portion 81, the second plane portion 812 is in contact with the first plane portion 822, which can effectively prevent the swing member 121 from retreating relative to the connecting rod 20, so as to ensure that the connecting sleeve assembly 10 and the connecting rod 20 can support the segment position to be corrected.

[0041] like Figure 3 and Figure 6 As shown, the first screw 30 is movably inserted into the connecting sleeve assembly 10 through the first metal bead 71, and the second screw 40 is movably inserted into the connecting rod 20 through the second metal bead 72. In this way, the first screw 30 can be transitionally connected with the connecting sleeve assembly 10 through the first metal bead 71, and the second screw 40 can be transitionally connected with the connecting rod 20 through the second metal bead 72, so that in the process of the connecting sleeve assembly 10 and the connecting rod 20 to open the segment to be corrected, the first metal bead 71 and the second metal bead 72 can provide multiple degrees of freedom, so that the connecting sleeve assembly 10 can rotate and move relative to the first screw 30, and similarly, the connecting rod 20 can rotate and move relative to the second screw 40. Non-fusion correction treatment of scoliosis is achieved.

[0042] like Figure 3 and Figure 6As shown, the first metal bead 71 is provided with a first avoidance hole 711 for the first screw 30 to pass through, and the connecting sleeve assembly 10 is formed with a first spherical hole 16 that contacts the outer surface of the first metal bead 71. The outer surface of the first metal bead 71 contacts and cooperates with the first spherical hole 16, so that the center of the first metal bead 71 and the center of the first spherical hole 16 can coincide, and the connecting sleeve assembly 10 can rotate and tilt relative to the first screw 30. The second metal bead 72 is provided with a second avoidance hole 721 for the second screw 40 to pass through, and the connecting rod 20 is formed with a second spherical hole 22 that contacts the outer surface of the second metal bead 72. The outer surface of the second metal bead 72 contacts and cooperates with the second spherical hole 22, so that the center of the second metal bead 72 and the center of the second spherical hole 22 can coincide, and the connecting rod 20 can rotate and tilt relative to the second screw 40.

[0043] like Figure 3 and Figure 6 As shown, the surfaces corresponding to the first screw 30 and the first avoidance hole 711 are polished, so that the surface of the first screw 30 is smoother, so that the surface of the first screw 30 and the hole wall of the first avoidance hole 711 are in smooth contact, and then the first screw 30 and the connecting sleeve assembly 10 can slide relative to each other.

[0044] like Figure 3 and Figure 6 As shown, the surfaces corresponding to the second screw 40 and the second avoidance hole 721 are polished, so that the surface of the second screw 40 is smoother, so that the surface of the second screw 40 and the hole wall of the second avoidance hole 721 are in smooth contact, and the second screw 40 and the connecting rod 20 can slide relative to each other.

[0045] like Figure 4 and Figure 6As shown, the first screw 30 and the second screw 40 both include a screw segment 31, a washer segment 32, a prism segment 33, a rod segment 34 and a threaded segment 35. The prism segment 33 supports the first metal bead 71 or the second metal bead 72. The rod segment 34 cooperates with the first avoidance hole 711 or the second avoidance hole 721. The scoliosis correction device also includes a nut that cooperates with the threaded segment 35. The setting of the nut on the first screw 30 can prevent the connecting sleeve assembly 10 from being separated from the first screw 30, and the setting of the nut on the second screw 40 can prevent the connecting rod 20 from being separated from the second screw 40. The screw segment 31 on the first screw 30 is implanted into the vertebral body, and the screw segment 31 on the second screw 40 is implanted into the vertebral body. During the implantation process, the prism segment 33 on the first screw 30 or the second screw 40 can be easily matched with the operating tool to realize the implantation of the first screw 30 or the second screw 40 into the vertebral body in a screw-in and screw-out manner. At the same time, the end of the prism segment 33 can support the first metal bead 71 or the second metal bead 72, so that the first metal bead 71 or the second metal bead 72 is pressed against the cross section of the prism segment 33. The prism segment 33 of this embodiment is a hexagonal prism, and of course, the prism segment can also be a triangular prism, a quadrangular prism, a pentagonal prism, or a heptagonal prism or more.

[0046] In this embodiment, the surface of the rod segment 34, the surface of the first metal bead 71, the surface of the second metal bead 72, the surface of the first spherical hole 16, the surface of the second spherical hole 22, the surface of the connecting rod 20, and the surface of the inner hole of the connecting sleeve assembly 10 are all provided with a friction-reducing layer. The provision of the friction-reducing layer can reduce the friction and wear caused by the movement between the rod segment 34 of the first screw 30 and the first avoidance hole 711, between the rod segment 34 of the second screw 40 and the second avoidance hole 721, between the outer surface of the first metal bead 71 and the first spherical hole 16, between the outer surface of the second metal bead 72 and the second spherical hole 22, and between the outer surface of the connecting rod 20 and the inner hole of the connecting sleeve assembly 10. The friction-reducing layer is preferably diamond-like carbon (DLC).

[0047] The connecting sleeve 11 is provided with an accommodating cavity 13, and the scoliosis correction device further comprises a cover provided at the opening of the accommodating cavity 13. The provision of the cover can prevent tissue outside the accommodating cavity 13 from entering the accommodating cavity 13, and can prevent the swinging member 121, the elastic reset member, the pivot shaft 14 and the limit pin 15 from being exposed outside the accommodating cavity 13, and can prevent the swinging member 121 from moving along the axis of the pivot shaft 14.

[0048] In this embodiment, the scoliosis correction device is made of medical metals, which include but are not limited to titanium and titanium alloys, cobalt alloys, stainless steel, tantalum metal, and magnesium alloys. Such metal materials are specified in the ISO-5830 series of international standards, and their biocompatibility has been confirmed by many years of orthopedic implant application practices at home and abroad.

[0049] The scoliosis correction device of the present application is a non-fusion treatment for adolescent idiopathic scoliosis, which can avoid the massive blood loss, neurological deficits including spinal cord injury, late infection and pseudoarthrosis caused by related fusion surgery. The limited spinal movement after fusion surgery also affects the spinal pain and intervertebral disc degeneration of the unfused segment. In addition, the height of the scoliosis correction device is adjusted by limiting and fixing the connecting sleeve assembly, the connecting rod and the ratchet locking structure, without the need for a secondary surgery, and the height of the adjustment is controllable and quantifiable, gradually achieving the correction of the scoliotic spine.

[0050] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A scoliosis correction device, characterized in that: include: Connecting sleeve assembly (10); A connecting rod (20) is movably inserted into the connecting sleeve assembly (10); A ratchet locking structure is arranged between the connecting sleeve assembly (10) and the connecting rod (20), the ratchet locking structure comprising a matching tooth and a locking tooth (82) abutting against the matching tooth, the matching tooth comprising a plurality of tooth portions (81), one of the matching tooth and the locking tooth (82) being arranged on the connecting sleeve assembly (10), and the other being arranged on the connecting rod (20), wherein when the locking tooth (82) is matched with different tooth portions (81), the connecting rod (20) is in different locking positions relative to the connecting sleeve assembly (10); A first screw (30) is inserted into the connecting sleeve assembly (10); A second screw (40) is inserted into the connecting rod (20); The connecting sleeve assembly (10) comprises a connecting sleeve (11), a swinging member (121) and an elastic reset member, the connecting rod (20) is movably inserted into the connecting sleeve (11), the connecting sleeve (11) is provided with an accommodating cavity (13), the accommodating cavity (13) is communicated with the inner hole of the connecting sleeve (11) and forms an installation space, the swinging member (121) is pivotally located in the installation space, the first end of the connecting rod (20) extends into the installation space, one of the matching tooth and the locking tooth (82) is arranged on the first end of the connecting rod (20), and the other is arranged on the swinging member (121), the second screw (40) is inserted into the second end of the connecting rod (20), and the elastic reset member can apply elastic force to the swinging member (121) so that the locking tooth (82) and the matching tooth are in abutment with each other; The elastic return member is a spring sheet (122) arranged on the swing member (121), a deformation gap is provided between the spring sheet (122) and the swing member (121), the spring sheet (122) cooperates with the cavity wall of the accommodating cavity (13), the matching tooth is arranged on the first end of the connecting rod (20), and the locking tooth (82) is arranged on the swing member (121); The connecting sleeve assembly (10) further comprises a limit pin (15), wherein the limit pin (15) is fixed on the bottom cavity wall of the accommodating cavity (13); the spring sheet (122) comprises a fixed end (123) and a free end (124), wherein the fixed end (123) is connected to the swinging member (121), and the free end (124) is located between the limit pin (15) and the side cavity wall of the accommodating cavity (13); The swing member (121) has a first end and a second end, the fixed end (123) is located on the first end of the swing member (121), the limit pin (15) is located on a side of the second end of the swing member (121) away from the first end of the swing member (121), the locking tooth (82) and the fixed end (123) are both connected to the first end of the swing member (121), and the spring sheet (122) protrudes from the second end of the swing member (121).

2. The scoliosis correction device according to claim 1, characterized in that: The connecting sleeve assembly (10) further comprises a pivot shaft (14), wherein the pivot shaft (14) passes through the swinging member (121) and is fixed on the bottom cavity wall of the accommodating cavity (13).

3. The scoliosis correction device according to claim 1, characterized in that: The hole wall of the inner hole of the connecting sleeve (11) is provided with a first guide surface (111), and the side wall of the connecting rod (20) is provided with a second guide surface (21) matching with the first guide surface (111).

4. The scoliosis correction device according to claim 1 or 3, characterized in that: The locking tooth (82) comprises a first inclined portion (821) and a first plane portion (822) connected to the first inclined portion (821), wherein the first inclined portion (821) is inclined relative to the axis of the connecting rod (20), and the first plane portion (822) is perpendicular to the axis of the connecting rod (20).

5. The scoliosis correction device according to claim 4, characterized in that: Each of the tooth portions (81) includes a second inclined portion (811) and a second planar portion (812) connected to the second inclined portion (811), wherein the second inclined portion (811) is inclined relative to the axis of the connecting rod (20), and the second planar portion (812) is perpendicular to the axis of the connecting rod (20), and the second planar portion (812) is capable of contacting and cooperating with the first planar portion (822).

6. The scoliosis correction device according to claim 1, characterized in that: The first screw (30) is movably inserted into the connecting sleeve assembly (10) via a first metal bead (71), and the second screw (40) is movably inserted into the connecting rod (20) via a second metal bead (72).

7. The scoliosis correction device according to claim 6, characterized in that: The first metal bead (71) is provided with a first avoidance hole (711) for the first screw (30) to pass through, the connecting sleeve assembly (10) is formed with a first spherical hole (16) in contact with the outer surface of the first metal bead (71), the second metal bead (72) is provided with a second avoidance hole (721) for the second screw (40) to pass through, and the connecting rod (20) is formed with a second spherical hole (22) in contact with the outer surface of the second metal bead (72).

8. The scoliosis correction device according to claim 7, characterized in that: The first screw (30) and the second screw (40) both include a screw segment (31), a washer segment (32), a prism segment (33), a rod segment (34) and a threaded segment (35); the prism segment (33) supports the first metal bead (71) or the second metal bead (72); the rod segment (34) cooperates with the first avoidance hole (711) or the second avoidance hole (721); and the scoliosis correction device further includes a nut that cooperates with the threaded segment (35); The surface of the rod segment (34), the surface of the first metal bead (71), the surface of the second metal bead (72), the surface of the first spherical hole (16), the surface of the second spherical hole (22), the surface of the connecting rod (20) and the surface of the inner hole of the connecting sleeve assembly (10) are all provided with a friction-reducing layer; The connecting sleeve assembly (10) comprises a connecting sleeve (11), a receiving cavity (13) is provided on the connecting sleeve (11), and the scoliosis correction device further comprises a cover arranged at the opening of the receiving cavity (13).

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