CN112370138A - Orthopedic screw and system for scoliosis of children - Google Patents
Orthopedic screw and system for scoliosis of children Download PDFInfo
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- CN112370138A CN112370138A CN202011334239.4A CN202011334239A CN112370138A CN 112370138 A CN112370138 A CN 112370138A CN 202011334239 A CN202011334239 A CN 202011334239A CN 112370138 A CN112370138 A CN 112370138A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
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Abstract
The invention discloses a children scoliosis orthopedic screw and a system, belonging to the technical field of orthopedic implants. The invention can realize that when the laterally convex vertebral body needs to be restored to an ideal position through rotation, the vertebral body can not be limited by the internal fixator such as the connecting rod, the pedicle screw and the like.
Description
Technical Field
The invention relates to the technical field of orthopedic implants, in particular to a children scoliosis orthopedic screw and a system.
Background
The early-onset scoliosis refers to a spinal deformity which occurs in children before the age of 10 and has a cobb angle of more than 10 degrees, causes of the spinal deformity include idiopathic, congenital, neuromuscular, syndrome and the like, and needs to correct and control the curvature of the spine before the bone of a child patient is mature. For some children, the patients need to receive surgical intervention to reduce the lateral bending angle, and the lateral bending angle of the spine of the patients is controlled within a certain range before the development is completed.
To address the above-mentioned conditions, spinal growth valve technology has emerged. The growth valve technique is currently the most widely used spinal non-fusion technique that can correct deformities while preserving the growth potential of the spine. The technology is mainly characterized in that holes are formed in the upper end and the lower end of a growth valve to connect a connecting rod and can be locked and fixed by screw plugs respectively, the upper end of the upper connecting rod is fixed on one or two vertebral bodies at the near end of a vertebral column through pedicle screws, and the lower connecting rod is fixed on one or two vertebral bodies at the far end of the vertebral column through other pedicle screws. After the growth valve is arranged on the concave side of the side curvature, the upper connecting rod and the lower connecting rod are longitudinally stretched, so that the spinal curvature segment can be gradually stretched; and loosening the screw plug on one side every half year to one year, longitudinally expanding the upper connecting rod or the lower connecting rod by using an expansion tool, and then locking by using the screw plug.
Most patients who receive the operation are younger than fourteen years old, so that the operation of propping open for many times is needed along with the growth and development of the sick children, and great pain is brought to the patients. The inventor finds in the research process that the technology has obvious shortcomings: although the longitudinal adjustment of the spine is realized by adjusting the length of the connecting rod controlled by the growth valve, the vertebral body fixed by the pedicle screws needs to rotate a certain angle to restore to the ideal state in addition to the change of the longitudinal height when restoring to the ideal position. However, in the existing operation, the pedicle screws and the connecting rods positioned at the near end or the far end of the spine are completely locked through the screw plugs, and the formed orthopedic system is inelastic and strong in fixation, so that the vertebral body cannot rotate. The screw has great influence on the mobility of the spine, particularly influences the natural growth of the spine and the postoperative orthopedic effect, and increases the pain of patients in the orthopedic period. In addition, the presence of rotational stresses in the vertebral body also increases the risk of fracture of the implant.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a children scoliosis orthopedic screw and a system, which can realize that when a scoliosis vertebral body needs to be restored to an ideal position through rotation, the vertebral body can not be limited to rotate by internal fixators such as a connecting rod, a pedicle screw and the like.
In order to solve the technical problems, the invention provides the following technical scheme:
on the one hand, the orthopedic screw of children's scoliosis is provided, the screw is the pedicle of vertebral arch nail, including the head of a nail and connecting the nail body of head of a nail below, the head of a nail has vertical through-hole and is used for placing the U type groove of connective bar, be equipped with the internal thread in the vertical through-hole, be connected with the plug screw that is used for fixed connection stick on the internal thread, the nail body has and is used for connecting bulb in the vertical through-hole of head of a nail, be equipped with respectively in the head of a nail and carry out spacing packing ring and axial stop device to the upper portion and the lower part of bulb, the structural design of packing ring, axial stop device and bulb makes when the connective bar is by the plug screw locking back, the bulb of the nail body can be at the.
Further, the axial limiting device is a C-shaped clamping ring arranged at the bottom of the inner side of the nail cap;
when the connecting rod is locked by the screw plug, the lower end of the washer is contacted and pressed on the upper surface of the clamping ring.
Further, the inner surface of the lower portion of the washer, the inner surface of the snap ring and the outer surface of the ball head are all concentric circles, and/or the inner surface of the lower portion of the washer, the inner surface of the snap ring and the outer surface of the ball head are all smooth surfaces.
Further, an annular boss is arranged above the gasket in the nail cap.
Furthermore, the axial limiting device is used for sleeving a ball ring coated on the ball head of the nail body, the bottom of the inner side of the nail cap is provided with a closing structure, and the inner diameter of a bottom hole of the nail cap is smaller than the outer diameter of the ball ring; when the connecting rod is locked by the screw plug, the lower end of the washer is pressed to contact the ball ring.
Furthermore, the ball ring is obtained by horizontally cutting off the upper end and the lower end of a spherical ring, and a plurality of vertical opening grooves are formed in the ball ring;
the ball ring is provided with a plurality of through holes, balls are arranged in the through holes, and the surfaces of the balls protrude to the inner side and the outer side of the ball ring.
Furthermore, the outer surfaces of the ball ring and the ball head are concentric circles.
Furthermore, a circumferential groove is formed in the middle of the outer side of the gasket, an instrument operation blind hole is formed in the position, corresponding to the gasket, of the lower portion of the outer side of the nail cap, and the bottom wall of the instrument operation blind hole is deformed through extrusion and then enters the circumferential groove of the gasket, so that the gasket is limited and fixed in the nail cap.
Furthermore, a closing structure is arranged at the bottom of the inner side of the nail cap, the axial limiting device is of the closing structure, and the inner diameter of a bottom hole of the nail cap is smaller than the outer diameter of a ball head of the nail body;
after the connecting rod is locked by the screw plug, the lower part of the washer is in pressing contact with the ball head of the nail body, and balls are arranged on the ball head of the nail body in a contact area with the washer and in a contact area with the inner wall of the nail cap.
In another aspect, a system for correcting scoliosis of children is provided, which comprises a pedicle screw and a growth valve rod, wherein the pedicle screw is the screw for correcting scoliosis of children.
The invention has the following beneficial effects:
the invention mainly realizes the function that the ball head part of the screw body can still rotate in the screw cap under the condition that the connecting rod, the screw plug and the screw cap are completely locked after the screw is implanted into the vertebral body through the structures of the gasket and the axial limiting device. Thus, when the laterally bent vertebral body needs to be rotated to a desired position, the ball head part of the nail body can automatically rotate in the nail cap along the direction required by the natural growth of the vertebra.
The screw can ensure that the vertebral body is not limited when needing to rotate in the treatment process, the normal growth and development of the vertebral column can not be limited, the stress generation between the internal fixator and the vertebral body can be avoided, the risk of fracture of the internal fixator and postoperative complications are reduced, and the pain of a patient is greatly reduced. The operation steps in the operation are the same as the operation steps of the common pedicle screw, so that the operation difficulty of a doctor cannot be increased.
Drawings
FIG. 1 is a block diagram of a first embodiment of the pediatric scoliosis orthopedic screw of the present invention, wherein (a) is an elevation view and (b) is a lateral view;
FIG. 2 is a cross-sectional view of the pediatric scoliosis orthopedic screw of FIG. 1;
FIG. 3 is a cross-sectional view of a second embodiment of the pediatric scoliosis orthopedic screw of the present invention;
fig. 4 is a structural view of the ball ring of fig. 3.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
In one aspect, the present invention provides a children scoliosis orthopedic screw, which is a pedicle screw, as shown in fig. 1 to 4, and comprises a screw cap 1 and a screw body 2 connected below the screw cap 1, wherein:
the nail cap 1 is provided with a vertical through hole (allowing the nail body 2 to be arranged from the upper end or the bottom of the nail cap 1 during assembly) and a U-shaped groove 11 for placing the connecting rod 3, an internal thread is arranged in the vertical through hole, and the internal thread is connected with a screw plug 4 for fixing the connecting rod 3; in the embodiment shown in the figures, the nut 1 also has a long tail 12 to accommodate minimally invasive surgery, it being understood that the long tail 12 may be omitted without affecting the implementation of the solution of the invention;
the nail body 2 is provided with a ball head (spherical head) 21 which is used for connecting in a vertical through hole of the nail head 1;
the inside of the nail head 1 is provided with a gasket 5 and an axial limiting device which respectively limit the upper part and the lower part of the ball head 21, and the structural design of the gasket 5, the axial limiting device and the ball head 21 enables the ball head 21 of the nail body 2 to rotate in a space formed by the gasket 5 and the axial limiting device after the connecting rod 3 is locked by the screw plug 4.
The core of the invention is that the function that the ball head 21 of the nail body 2 can still rotate in the nail cap 1 under the condition that the connecting rod 3, the screw plug 4 and the nail cap 1 are completely locked after the screw is implanted into the vertebral body is realized through a special connecting structure among the components, so that the vertebral body can rotate to the direction and the position required by the natural growth of the spinal column.
When the screw is applied to the scoliosis treatment of children, the screw is firstly implanted into a vertebral body at the near end or the far end of the spine, and a connecting rod is placed into a U-shaped groove of a screw cap at the near end or the far end of the spine according to the difference of the positions of the implanted vertebral body; the screw plug is screwed in along the internal thread of the screw cap and pressed on the connecting rod, and the screw plug is continuously screwed in until the screw cap, the connecting rod and the gasket are completely locked, at the moment, the ball head of the screw body can still rotate in a space formed by the gasket and the axial limiting device although the ball head of the screw body can not move due to the existence of the axial limiting device. When the laterally bent vertebral body needs to be rotated to a desired position, the ball head part of the nail body can automatically rotate in the nail cap along the direction required by the natural growth of the vertebra.
The screw can ensure that the vertebral body is not limited when needing to rotate in the treatment process, the normal growth and development of the vertebral column can not be limited, the stress generation between the internal fixator and the vertebral body can be avoided, the risk of fracture of the internal fixator and postoperative complications are reduced, and the pain of a patient is greatly reduced. The operation steps in the operation are the same as the operation steps of the common pedicle screw, so that the operation difficulty of a doctor cannot be increased.
The invention mainly realizes the function that the ball head part of the screw body can still rotate in the screw cap under the condition that the connecting rod, the screw plug and the screw cap are completely locked after the screw is implanted into the vertebral body through the structures of the gasket and the axial limiting device. The following embodiments of the invention are possible depending on the specific construction of the washer and the axial stop.
Example one
As shown in fig. 1-2, in the present embodiment, the axial limiting device is a C-shaped snap ring 6 disposed at the bottom of the inside of the nut 1, and in a specific implementation, the bottom of the inside of the nut 1 may be provided with an annular groove 17 to accommodate the snap ring 6;
when the connecting rod 3 is locked by the screw plug 4, the lower end of the gasket 5 is in contact with and presses the upper surface of the snap ring 6, so that the screw cap 1, the screw plug 4, the connecting rod 3, the gasket 5 and the snap ring 6 form a stress link and are in a locking state, and the independent locking of the connecting rod 3 can be realized, rather than the simultaneous locking of the connecting rod 3 and the ball head 21 in the prior art.
The assembly and use of the present embodiment can be referred to as follows:
the washer 5 and the ball 21 of the nail body 2 sequentially enter the nail cap 1 through the bottom hole 13 of the nail cap 1, one side of the snap ring 6 is provided with an opening, the snap ring can be firstly unfolded and sleeved into the nail body 2 and then slides towards the nail cap 1, and finally the snap ring is extruded into the bottom hole 13 of the nail cap 1 and then is placed into the nail cap 1, at the moment, the snap ring 6 can prevent the washer 5 and the ball 21 of the nail body 2 from being separated from the bottom hole 13 of the nail cap 1 and is matched with the washer 5, so that the ball 21 of the nail body 2 can only rotate in a space formed by the washer 5 and the snap ring.
After the screw is implanted into a vertebral body at the near end or the far end of the spine, the connecting rod 3 is placed into the screw cap 1, then the screw plug 4 is screwed in along the internal thread of the screw cap 1 and is contacted with the connecting rod 3, and when locking is needed, the screw plug 4 is continuously screwed in along the internal thread of the screw cap 1 and the connecting rod 3 descends; the washer 5 is gradually contacted and pressed with the snap ring 6 under the extrusion of the connecting rod 3, and the space formed by the washer and the snap ring is reduced, so that the ball head 21 of the nail body 2 cannot move and only can keep the rotary capacity (in the embodiment, the universal rotation is realized); the screw cap 1, the screw plug 4, the connecting rod 3, the washer 5 and the snap ring 6 form a stressed link which is in a locking state, and the locking of the connecting rod 3 is not influenced, so that the aim of the invention is fulfilled.
In order to ensure that the ball 21 of the nail body 2 can better rotate in the space formed by the washer 5 and the snap ring 6, the inner surface of the lower part of the washer 5, the inner surface of the snap ring 6 and the outer surface of the ball 21 are preferably concentric circles, so that the matching degree is improved, and the friction resistance is reduced; further, the inner surface of the lower portion of the washer 5, the inner surface of the snap ring 6, and the outer surface of the ball head 21 may be smooth surfaces to further reduce friction.
In order to improve the assembling firmness of the screw, an annular boss 14 can be arranged above the gasket 5 in the screw cap 1 to block the gasket 5 and prevent the gasket 5 from being separated from the screw cap 1.
Example two
As shown in fig. 3, the axial limiting device in this embodiment is used for sleeving a ball ring 7 (embedded with balls) covering a ball head 21 of a nail body, the bottom of the inner side of the nail cap 1 is provided with a closing-in structure 15, and the existence of the closing-in structure 15 enables the inner diameter of a bottom hole 13 of the nail cap 1 to be smaller than the outer diameter of the ball ring 7; the inner diameter of the vertical through hole of the nail cap 1 needs to be larger than or equal to the outer diameter of the ball ring 7, so that the ball ring 7 can be smoothly arranged in the nail cap 1;
when the connecting rod 3 is locked by the screw plug 4, the lower end of the washer 5 is pressed into contact with the ball ring 7.
As shown in fig. 4, the specific structure of the ball ring 7 is preferably as follows:
the ball ring 7 is obtained by horizontally cutting off the upper end and the lower end of a spherical ring, and a plurality of vertical opening grooves 71 are arranged on the ball ring 7;
the ball ring 7 is provided with a plurality of through holes, the balls 72 are arranged in the through holes (the through holes can be slightly knocked in for installation), and the surfaces of the balls 72 protrude to the inner side and the outer side of the ball ring 7.
The assembly and use of the present embodiment can be referred to as follows:
the ball head 21 of the nail body 2 is squeezed into the ball ring 7 by utilizing the opening effect of the opening groove 71, because of the existence of the ball 72, a gap is reserved between the ball ring 7 and the ball head 21 of the nail body 2 and is only connected through the ball 72, then the nail body 2 assembled with the ball ring 7 is put into the bottom hole 13 of the nail cap 1 from the opening at the upper end of the nail cap 1 and passes through the bottom hole 13 of the nail cap 1, the diameter of the bottom hole 13 of the nail cap 1 is smaller than that of the ball ring 7, so that the limiting effect is realized, and the ball ring 7 and the ball head 21 of the nail body 2 can be prevented from being separated from the bottom hole 13 of the nail cap 1; then a washer 5 is arranged above the nail cap 1 and is buckled on the ball ring 7.
After the screw is implanted into the vertebral body at the near end or the far end of the spine, the connecting rod 3 is placed into the screw cap 1, then the screw plug 4 is screwed in along the internal thread of the screw cap 1 and is contacted with the connecting rod 3, and when the screw plug 4 is locked according to the requirement of the operation, the screw plug 4 is continuously screwed in along the internal thread of the screw cap 1 and the connecting rod 3 descends; the washer 5 is gradually close to the ball ring 7 due to the extrusion of the connecting rod 3 and presses the ball ring 7 and the inner side of the nail cap 1, and the ball ring 7 cannot move due to the action of the washer 5 and the bottom hole 13 of the nail cap 1; at the moment, the screw cap 1, the screw plug 4, the connecting rod 3 and the washer 5 are locked together and can be regarded as a whole; due to the existence of a large number of balls 72, the nail head 1, the washer 5, the ball ring 7 and the ball head 21 of the nail body 2 are connected only through the balls 72, so that a structure similar to a bearing principle is formed, wherein the ball head 21 of the nail body 2 can be regarded as a bearing inner ring, the whole formed by the nail head 1 and the washer 5 can be regarded as a bearing outer ring, and the ring body of the ball ring 7 can be regarded as a ball support frame with the balls. When the screw body 2 is driven by the vertebral body to axially rotate, the structure realizes that the ball head 21 of the screw body 2 cannot move and only can keep the rotation capacity, and simultaneously, the screw cap 1, the screw plug 4, the connecting rod 3 and the washer 5 are in a locking state, thereby realizing the purpose of the invention.
In order to make the ball 21 of the nail body 2 rotate in the space formed by the washer 5 and the ball ring 7, the outer surfaces of the ball ring 7 and the ball 21 are preferably concentric circles, so that the matching degree is improved, and the friction force is reduced.
In order to improve the self-assembly firmness of the screw, the middle part of the outer side of the washer 5 can be provided with a circumferential groove 51, the lower part of the outer side of the screw cap 1 corresponding to the washer 5 is provided with an instrument operation blind hole 16, the bottom wall (the bottom wall is thin-walled) of the instrument operation blind hole 16 is deformed by extrusion and then enters the circumferential groove 51 of the washer 5, so that the washer 5 is limited and fixed in the screw cap 1, and the washer 5 is prevented from being separated from the upper part of the screw cap 1.
EXAMPLE III
In the embodiment, not shown, and referring to fig. 4 as appropriate, the bottom of the inner side of the nail cap 1 is provided with a closing-in structure 15, the axial limiting device is the closing-in structure 15, and the inner diameter of the bottom hole 13 of the nail cap 1 is smaller than the outer diameter of the ball 21 of the nail body 2;
when the connecting rod 3 is locked by the screw plug 4, the lower part of the washer 5 is pressed and contacted with the ball 21 of the nail body 2, and the ball 21 of the nail body 2 is provided with balls in the contact area with the washer 5 and the contact area with the inner wall of the nail head 1.
The principle of the embodiment is similar to that of the second embodiment, and the difference is that the ball is directly arranged on the ball head (particularly, a mounting hole can be dug on the ball head), wherein the ball head of the nail body is regarded as the combination of the bearing inner ring and the ball support frame, and the whole formed by the nail cap and the washer is regarded as the bearing outer ring. The present embodiment can also achieve the object of the present invention.
In order to make the ball 21 of the nail body 2 rotate in the space formed by the washer 5 and the closing-in structure 15, the inner surface of the lower part of the washer 5, the inner surface of the closing-in structure 15 and the outer surface of the ball 21 are preferably concentric circles, so as to improve the matching degree and reduce the friction force.
In another aspect, the present invention provides a system for correcting scoliosis in children, which includes a pedicle screw and a growth valve rod (i.e., a growth valve and a connecting rod connected to the upper and lower ends of the growth valve), wherein the pedicle screw is the above-mentioned screw for correcting scoliosis in children, and the structure is the same as above, and therefore, the description thereof is omitted here.
The screw in the children scoliosis orthopedic system can ensure that the vertebral body is not limited when needing to rotate in the treatment process, the normal growth and development of the vertebral column can not be limited, the stress generation between the internal fixator and the vertebral body can be avoided, the risk of fracture of the internal fixator and postoperative complications are reduced, and the pain of patients is greatly reduced. The operation steps in the operation are the same as the operation steps of the common pedicle screw, so that the operation difficulty of a doctor cannot be increased.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a children's scoliosis orthopedic screw, the screw is the pedicle of vertebral arch nail, including the head of a nail and connecting the nail body of head of a nail below, the head of a nail has vertical through-hole and is used for placing the U type groove of connective bar, be equipped with the internal thread in the vertical through-hole, be connected with the plug screw that is used for fixed connection stick on the internal thread, the nail body has and is used for connecting bulb in the vertical through-hole of head of a nail, its characterized in that, be equipped with respectively and carry out spacing packing ring and axial stop device to the upper portion and the lower part of bulb in the head of a nail, the structural design of packing ring, axial stop device and bulb makes when the connective bar is by the plug screw locking back, the bulb of the nail body can be at the.
2. The pediatric scoliosis orthopedic screw of claim 1, wherein the axial stop is a C-shaped snap ring disposed at the bottom of the inside of the nut;
when the connecting rod is locked by the screw plug, the lower end of the washer is contacted and pressed on the upper surface of the clamping ring.
3. The orthopedic screw of scoliosis according to claim 2, characterized in that the inner surface of the washer lower portion, the inner surface of the snap ring and the outer surface of the ball head are all concentric circles and/or the inner surface of the washer lower portion, the inner surface of the snap ring and the outer surface of the ball head are all smooth surfaces.
4. The pediatric scoliosis orthopedic screw of claim 2, wherein the nut is provided with an annular boss within the nut above the washer.
5. The children scoliosis orthopedic screw according to claim 1, wherein the axial limiting device is a ball ring covering the ball head of the screw body, the bottom of the inner side of the screw cap is provided with a closing structure, and the inner diameter of the bottom hole of the screw cap is smaller than the outer diameter of the ball ring;
when the connecting rod is locked by the screw plug, the lower end of the washer is pressed to contact the ball ring.
6. The orthopedic screw for scoliosis of children according to claim 5, wherein said ball ring is a spherical ring with upper and lower ends horizontally cut off, and a plurality of vertical opening grooves are formed on said ball ring;
the ball ring is provided with a plurality of through holes, balls are arranged in the through holes, and the surfaces of the balls protrude to the inner side and the outer side of the ball ring.
7. The pediatric scoliosis orthopedic screw of claim 5, wherein the outer surfaces of the ball ring and ball head are concentric circles.
8. The orthopedic screw for scoliosis of children as claimed in claim 5, wherein a circumferential groove is formed in the middle of the outer side of the washer, a blind instrument-operating hole is formed in the lower part of the outer side of the screw cap corresponding to the washer, and the bottom wall of the blind instrument-operating hole is deformed by squeezing and enters the circumferential groove of the washer so as to fix the washer in the screw cap in a limiting manner.
9. The orthopedic screw for scoliosis of children as claimed in claim 1, wherein the inside bottom of the nail cap has a closing-in structure, the axial limiting device is the closing-in structure, and the inner diameter of the bottom hole of the nail cap is smaller than the outer diameter of the ball head of the nail body;
after the connecting rod is locked by the screw plug, the lower part of the washer is in pressing contact with the ball head of the nail body, and balls are arranged on the ball head of the nail body in a contact area with the washer and in a contact area with the inner wall of the nail cap.
10. A children's scoliosis correction system comprising a pedicle screw and a growth valve stem, wherein the pedicle screw is a children's scoliosis correction screw as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011334239.4A CN112370138A (en) | 2020-11-24 | 2020-11-24 | Orthopedic screw and system for scoliosis of children |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011334239.4A CN112370138A (en) | 2020-11-24 | 2020-11-24 | Orthopedic screw and system for scoliosis of children |
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| Publication Number | Publication Date |
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| CN112370138A true CN112370138A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011334239.4A Pending CN112370138A (en) | 2020-11-24 | 2020-11-24 | Orthopedic screw and system for scoliosis of children |
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| CN (1) | CN112370138A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113813032A (en) * | 2021-08-23 | 2021-12-21 | 天津正天医疗器械有限公司 | A spinal internal fixation system |
| CN114224462A (en) * | 2021-12-13 | 2022-03-25 | 北京纳通医疗科技控股有限公司 | Connecting rod disengagement prevention part, rod connecting seat and pedicle screw |
| CN118902582A (en) * | 2024-07-22 | 2024-11-08 | 武汉医佳宝生物材料有限公司 | Multi-shaft nail and nail rod system |
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| CN102525614A (en) * | 2010-12-10 | 2012-07-04 | 比德尔曼技术有限责任两合公司 | Receiving part for receiving a rod for coupling the rod to a bone anchoring element and a bone anchoring device |
| US20120232598A1 (en) * | 2011-03-09 | 2012-09-13 | Zimmer Spine, Inc. | Polyaxial pedicle screw with increased angulation |
| US20130096623A1 (en) * | 2011-09-15 | 2013-04-18 | Lutz Biedermann | Polyaxial bone anchoring device with enlarged pivot angle |
| US20170281241A1 (en) * | 2014-10-21 | 2017-10-05 | Roger P. Jackson | Bone anchor having a snap-fit assembly |
| CN214318115U (en) * | 2020-11-24 | 2021-10-01 | 朱晓东 | Orthopedic screw and system for scoliosis of children |
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| CN113813032A (en) * | 2021-08-23 | 2021-12-21 | 天津正天医疗器械有限公司 | A spinal internal fixation system |
| CN114224462A (en) * | 2021-12-13 | 2022-03-25 | 北京纳通医疗科技控股有限公司 | Connecting rod disengagement prevention part, rod connecting seat and pedicle screw |
| CN114224462B (en) * | 2021-12-13 | 2024-03-29 | 北京纳通医疗科技控股有限公司 | Connecting rod anti-disengagement parts, rod connecting seat and pedicle screws |
| CN118902582A (en) * | 2024-07-22 | 2024-11-08 | 武汉医佳宝生物材料有限公司 | Multi-shaft nail and nail rod system |
| CN118902582B (en) * | 2024-07-22 | 2025-03-14 | 武汉医佳宝生物材料有限公司 | Multi-shaft nail and nail rod system |
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