CN114224462A - Connecting rod anti-falling part, rod connecting seat and pedicle screw - Google Patents
Connecting rod anti-falling part, rod connecting seat and pedicle screw Download PDFInfo
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- CN114224462A CN114224462A CN202111518448.9A CN202111518448A CN114224462A CN 114224462 A CN114224462 A CN 114224462A CN 202111518448 A CN202111518448 A CN 202111518448A CN 114224462 A CN114224462 A CN 114224462A
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- 230000000903 blocking effect Effects 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 4
- 239000007943 implant Substances 0.000 abstract description 2
- 230000000399 orthopedic effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 19
- 238000001356 surgical procedure Methods 0.000 description 13
- 230000004888 barrier function Effects 0.000 description 8
- 206010039722 scoliosis Diseases 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000002512 anti-withdrawal effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 101500028702 Mus musculus Dll1-soluble form Proteins 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000002612 cardiopulmonary effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- 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 ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
- A61B17/7034—Screws or hooks with U-shaped head or back through which longitudinal rods pass characterised by a lateral opening
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- 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 ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7043—Screws or hooks combined with longitudinal elements which do not contact vertebrae with a longitudinal element fixed to one or more transverse elements which connect multiple screws or hooks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- 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 ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- 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
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- 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
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- 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
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
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- Surgical Instruments (AREA)
Abstract
The invention discloses a connecting rod anti-falling part, a rod connecting seat and a pedicle screw, and belongs to the technical field of orthopedic implants. The connecting rod anti-drop piece, the rod connecting seat and the pedicle screw are easy to put on or place the rod, and the connecting rod is not easy to drop outwards.
Description
Technical Field
The invention relates to the technical field of orthopedic implants, in particular to a connecting rod anti-falling piece, a rod connecting seat and a pedicle screw.
Background
Scoliosis is a three-dimensional deformity of the spine that includes coronal, sagittal, and axial sequence abnormalities. Severe scoliosis can affect the growth and development of infants and teenagers, deform the body, affect the cardio-pulmonary function, even involve the spinal cord, and cause paralysis. Scoliosis not only affects the physical health of the patient, but also its mental health.
In the existing lateral bending operation, doctors mostly adopt conventional pedicle screws to treat patients, the conventional pedicle screws generally comprise screw bases and screw bodies, the screw bases are provided with U-shaped grooves for placing connecting rods, and screw plugs are connected in the U-shaped grooves in a threaded mode; in the operation process, the connecting rod needs to span a larger distance or exceed the height of a nail seat of the pedicle screw (as shown in fig. 1) so as to be used for placing the rod, so that the connecting rod can touch muscle tissues in the moving process to cause damage, and meanwhile, the pedicle screw or the connecting rod can be deformed to a certain extent to increase the risk of fracture or failure.
The U type groove on the seat of a nail of conventional pedicle of vertebral arch screw is mostly the upper shed form, and during the final locking connecting rod of screw plug in the art, can make U type groove on the seat of a nail appear "rise mouthful" condition because the moment of torsion is too big, and similar "eight" word shape of falling appears, "the thread damage condition such as thread breakage, the reduction of seat of a nail intensity that causes the pedicle of vertebral arch screw, increase operation hidden danger risk easily appears in" dropout ". In addition, in the existing pedicle screw with the side opening, the screw seat is easy to be separated from the screw seat outwards by the rotating bottom surface of the screw plug in the process of screwing the screw plug into the locking connecting rod, so that the operation is delayed or fails.
Disclosure of Invention
The invention aims to solve the technical problem of providing a connecting rod anti-falling part, a rod connecting seat and a pedicle screw, wherein the connecting rod is easy to put on or place and is not easy to fall off outwards.
In order to solve the technical problems, the invention provides the following technical scheme:
on the one hand, provide a connective bar anticreep spare for open-sided stick connecting seat, the stick connecting seat has the side opening and is used for placing the C-shaped groove of connective bar, connective bar anticreep spare including be used for the location to connect in location portion of stick connecting seat upper end and with location portion connection follow stick connecting seat side downwardly extending is used for blockking the connective bar and follows the part that blocks that deviates from in the C-shaped groove.
Further, the positioning part is a positioning ring sleeved at the upper end of the rod connecting seat;
and/or the blocking part comprises a first limiting rod positioned on one side of the connecting rod close to the opening of the C-shaped groove.
Furthermore, the blocking part also comprises a second limiting rod which is positioned on one side of the connecting rod, which is far away from the opening of the C-shaped groove.
Furthermore, the first limiting rods are a pair and are arranged on two sides of the rod connecting seat along the length direction of the connecting rod;
and/or the second limiting rods are a pair and are arranged on two sides of the rod connecting seat along the length direction of the connecting rod;
and/or the positioning ring is provided with a downward extending extension part.
On the other hand, the rod connecting seat is provided with a C-shaped groove with an opening at the side for placing a connecting rod, a fastener for fixing the connecting rod is arranged above the C-shaped groove, and the connecting rod anti-falling part is arranged on the rod connecting seat.
Furthermore, the outer surface of the rod connecting seat is provided with a longitudinal groove for accommodating the first limiting rod and/or the second limiting rod of the blocking part.
Furthermore, the rod connecting seat is provided with a threaded hole communicated with the C-shaped groove, the fastener is a plug screw in the threaded hole in a threaded connection mode, and the middle of the lower end face of the plug screw is provided with a bulge.
Furthermore, the upper end of the rod connecting seat is provided with screw plug anti-withdrawal teeth which can be bent along the radial direction of the threaded hole;
and/or the upper end of the rod connecting seat is provided with a tool matching groove;
and/or the screw plug comprises a threaded section positioned at the lower part and a driving section positioned at the upper part, and a self-breaking groove is arranged between the threaded section and the driving section.
In another aspect, a pedicle screw is provided, which includes a screw seat and a screw body, wherein the screw seat is the rod connecting seat.
Further, a ball head is arranged at the upper end of the nail body, a mounting hole which is communicated with the C-shaped groove and used for accommodating the ball head is formed below the rod connecting seat, a gasket capable of moving up and down is arranged in the mounting hole, a ball socket matched with the ball head is arranged on the gasket, a plurality of longitudinal grooves capable of enabling the gasket to be elastically stretched are formed in the gasket, the gasket is stretched by the ball head after the ball head enters the mounting hole, the gasket and the ball socket form a ball head-ball socket matching structure, and when the ball head moves downwards and is separated from the mounting hole, the gasket moves downwards along with the ball head to enable the ball head to be clamped at the opening at the lower end of the mounting hole.
Further, the upper end of the gasket is provided with a rod bearing part, and when the connecting rod is locked in the C-shaped groove, the lower end of the gasket is located at the lower end opening of the mounting hole.
Furthermore, a vertical guide rotation-preventing platform is arranged on the rod bearing part, and a guide rotation-preventing groove matched with the guide rotation-preventing platform is arranged on the side surface of the C-shaped groove;
and/or the longitudinal groove is in a long-strip horn mouth shape;
and/or the root part of the longitudinal slot is provided with a round gap.
Furthermore, a plurality of transverse grooves are formed in the inner surface of the ball socket of the gasket;
and/or a spiral groove or an annular groove is arranged on the ball head;
and/or the threads on the nail body are designed with double taper degrees from the nail tip to the nail tail, and the thread peaks are gradually enlarged.
Furthermore, the two C-shaped grooves of the rod connecting seat are arranged in a back direction;
or the C-shaped groove of the rod connecting seat is one, the back of the C-shaped groove is provided with a U-shaped groove for placing another connecting rod, and a fastener for fixing the other connecting rod is arranged above the U-shaped groove;
or the bottom of the rod connecting seat is provided with a transverse extending part, the transverse extending part is provided with another rod connecting seat, the other rod connecting seat is provided with a U-shaped groove, and a fastener for fixing the other connecting rod is arranged above the U-shaped groove.
The invention has the following beneficial effects:
according to the connecting rod anti-falling piece, the rod connecting seat and the pedicle screw, the connecting rod anti-falling piece is used for the rod connecting seat with the side opening, the rod connecting seat is provided with the C-shaped groove with the side opening and used for placing the connecting rod, the situation of opening expansion is avoided, the connecting rod does not need to span a large distance or exceed the height of the rod connecting seat when the rod is loaded or placed in an operation, the rod is loaded or placed easily, and the rod placing process is simple, convenient, rapid and safe; the connective bar anticreep piece is including being used for the location to connect in the location portion of excellent connecting seat upper end and being connected from excellent connecting seat lateral surface downwardly extending with location portion and being used for blockking the barrier portion that the connective bar deviates from in the C-shaped groove, like this at the in-process of locking connective bar, the barrier portion can block that the connective bar deviates from in the C-shaped groove, reduces the risk of operation.
Drawings
FIG. 1 is a schematic illustration of a rod loading process for a pedicle screw of the prior art;
FIG. 2 is a schematic view showing the overall structure of the connecting rod separation preventing member of the present invention;
FIG. 3 is an exploded view of embodiment 1 of the pedicle screw of the invention;
FIG. 4 is a schematic structural view of the rod connecting seat/nail seat in the pedicle screw shown in FIG. 3, wherein (a) is a sectional view, (b) is a perspective view, and (c) is a perspective view of an improved structure;
FIG. 5 is a schematic structural view of a shim in the pedicle screw of FIG. 3, wherein (a) is a sectional view, (b) is a perspective view, and (c) is an enlarged structural view of a longitudinal slot therein;
FIG. 6 is a schematic view of a modified shim in the pedicle screw of FIG. 3;
FIG. 7 is a schematic structural view of a plug screw in the pedicle screw of FIG. 3, wherein (a) is a front view and (b) is a perspective view;
FIG. 8 is a schematic structural view of the shank of the pedicle screw of FIG. 3;
FIG. 9 is a schematic diagram showing the relationship between the fitting dimensions of the ball head, the washer, and the rod-connecting seat of the shank of the pedicle screw shown in FIG. 3;
FIG. 10 is a schematic view of the engagement process of the ball head, the washer, and the rod-connecting seat of the nail body in the pedicle screw shown in FIG. 3;
FIG. 11 is a schematic structural view of pedicle screw embodiment 2 of the invention, wherein (a) is an exploded structural view, (b) is a whole structural view, and (c) is a sectional view;
FIG. 12 is a schematic structural view of pedicle screw embodiment 3 of the invention, wherein (a) is an exploded structural view, (b) is a whole structural view, and (c) is a sectional view;
FIG. 13 is a schematic structural view of pedicle screw embodiment 4 of the invention, wherein (a) is an exploded structural view, (b) is a whole structural view, and (c) is a sectional view;
FIG. 14 is a schematic structural view of the gasket of FIG. 13, wherein (a) is a front view and (b) is a sectional view;
fig. 15 is a schematic structural view of pedicle screw of example 5 of the invention, wherein (a) is an exploded structural view, (b) is a whole structural view, and (c) is a sectional view.
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 connecting rod separation preventing member 6, as shown in fig. 2 to 3, for a side-opened rod connecting socket 1, the rod connecting socket 1 having a side-opened C-shaped groove 10 for receiving a connecting rod 5, the connecting rod separation preventing member 6 including a positioning portion for positioning the connecting rod connected to the upper end of the rod connecting socket 1, and a blocking portion connected to the positioning portion and extending downward from the side of the rod connecting socket 1 for blocking the connecting rod 5 from being separated from the C-shaped groove 10.
When using in the art, place connective bar 5 in the C-shaped groove 10 of excellent connecting seat 1 earlier, with the location portion fixed connection of connective bar anticreep piece 6 in the upper end of excellent connecting seat 1 before final locking connective bar 5, the part that blocks of connective bar anticreep piece 6 can block connective bar 5 and deviate from C-shaped groove 10, then according to conventional technique with connective bar 5 locking fix in C-shaped groove 10 can.
According to the connecting rod anti-falling piece, the connecting rod anti-falling piece is used for the rod connecting seat with the side opening, the rod connecting seat is provided with the C-shaped groove with the side opening and used for placing the connecting rod, the 'mouth expansion' condition is avoided, the connecting rod does not need to span a larger distance or turn over the height of the rod connecting seat when the rod is loaded or placed in an operation, the rod loading or placing is easy, and the simple, quick and safe rod placing process is realized; the connective bar anticreep piece is including being used for the location to connect in the location portion of excellent connecting seat upper end and being connected from excellent connecting seat lateral surface downwardly extending with location portion and being used for blockking the barrier portion that the connective bar deviates from in the C-shaped groove, like this at the in-process of locking connective bar, the barrier portion can block that the connective bar deviates from in the C-shaped groove, reduces the risk of operation. The invention is suitable for various spinal surgeries, including lateral bending surgeries (especially thoracolumbar lateral bending surgeries).
The positioning part of the connecting rod anti-falling piece 6 can adopt various structural forms which are easily thought by a person skilled in the art, for example, the positioning part is a screw, a bolt and the like; further, in order to improve the firmness and the operation convenience of the positioning portion, the positioning portion is preferably a positioning ring 61 sleeved at the upper end of the rod connecting seat 1, and the positioning ring 61 is sleeved at the upper end of the rod connecting seat 1 when the positioning device is used. The positioning ring 61 may be provided with a downward extending extension 611 (fig. 12 (a)) to improve the overall strength of the positioning ring 61 and the firmness of the positioning connection.
The blocking portion of the connecting rod release preventer 6 may take various structural forms as easily conceived by those skilled in the art, such as a limit plate, etc.; however, in order to reduce the occupied space, the blocking portion in the present invention may include a first stopper rod 62 located at one side of the connecting rod 5 adjacent to the opening of the C-shaped groove 10 (i.e., the left side in fig. 2), and the first stopper rods 62 are preferably a pair and disposed at both sides of the rod connecting socket 1 in the length direction of the connecting rod 5. Further, in order to prevent the connecting rod 5 from deflecting/shaking towards the side away from the opening of the C-shaped groove 10, the blocking portion may further include a second limiting rod 62 ' located at the side of the connecting rod 5 away from the opening of the C-shaped groove 10 (i.e., the right side in fig. 2), and the second limiting rod 62 ' is preferably a pair and is disposed at two sides of the rod connecting seat 1 along the length direction of the connecting rod 5, at this time, the first limiting rod 62 and the second limiting rod 62 ' are respectively located at two sides of the connecting rod 5, so as to better prevent the connecting rod 5 from deflecting and dropping out in the C-shaped groove 10.
On the other hand, the invention provides a rod connecting seat 1, wherein the rod connecting seat 1 is provided with a C-shaped groove 10 with an opening side for placing a connecting rod 5, a fastening piece for fixing the connecting rod 5 is arranged above the C-shaped groove 10, and the connecting rod anti-falling piece 6 is arranged on the rod connecting seat 1. Since the structure of the connecting rod anticreep piece 6 is the same as above, it is not described herein again.
According to the rod connecting seat, the connecting rod anti-falling piece is used for the rod connecting seat with the side opening, the rod connecting seat is provided with the C-shaped groove with the side opening for placing the connecting rod, the 'mouth expansion' condition is avoided, the connecting rod does not need to span a larger distance or turn over the height of the rod connecting seat when the rod is loaded or placed in an operation, the rod is loaded or placed easily, and the rod placing process is simple, convenient, rapid and safe; the connective bar anticreep piece is including being used for the location to connect in the location portion of excellent connecting seat upper end and being connected from excellent connecting seat lateral surface downwardly extending with location portion and being used for blockking the barrier portion that the connective bar deviates from in the C-slot, like this at the in-process of locking connective bar, the barrier portion can block that the connective bar deviates from in the C-slot, and the fastener can firmly be fixed the connective bar in the C-slot, reduces the risk of operation.
As shown in fig. 4, the outer surface of the rod connecting seat 1 may be provided with a longitudinal groove 16 for receiving the first stopper rod 62 and/or the second stopper rod 62 'of the stopper, so that the stopper rods 62, 62' of the stopper are fixed by means of the longitudinal groove 16 of the outer surface of the rod connecting seat 1, which can significantly improve the firmness of the connecting rod anti-falling part 6 on the rod connecting seat 1, increase safety, and reduce surgical risks.
The fastener for fixing the connecting rod 5 in the present invention preferably takes the following structural form:
as shown in fig. 3-4 and 7, the rod connecting seat 1 may be provided with a threaded hole 18 communicated with the C-shaped groove 10, the fastener is a plug screw 4 threaded into the threaded hole 18, a protrusion 43 is provided in the middle of the lower end surface of the plug screw 4, so that in the process of locking the connecting rod 5 in the C-shaped groove 10 by the plug screw 4, the protrusion 43 on the lower end surface of the plug screw 4 is in point contact with the connecting rod 5, if there is no protrusion 43, when the connecting rod 5 is locked to reach a set torque, either the lower end surface of the plug screw 4 is deformed to generate a rod indentation, or the connecting rod 5 is deformed to generate a ring-shaped rotation indentation on the outer surface of the connecting rod 5, or both cases are present, which easily forms a fatigue fracture source and causes a potential surgical hazard.
Further, the screw plug 4 may include a threaded section 41 at a lower portion and a driving section 45 at an upper portion, and a self-breaking groove 42 is formed between the threaded section 41 and the driving section 45, so that when the screw plug 4 reaches a set torque, the driving section 45 will break at the self-breaking groove 42, and at the same time, the protrusion 43 at the middle portion of the lower end surface of the screw plug 5 releases the stress between the connecting rod 5 and the connecting rod 5, thereby achieving an optimal locking and fixing state.
As shown in fig. 4, the upper end of the rod connecting seat 1 may be provided with a plug screw anti-withdrawal tooth 19 which can be bent along the radial direction of the threaded hole 18, and when the plug screw 4 is not provided with the self-breaking groove 42 and the driving section 45, the plug screw anti-withdrawal tooth 19 may be directly matched with the upper end surface of the plug screw 4; when the screw plug 4 is in the structure shown in fig. 7 (i.e. the screw plug is provided with the self-breaking groove 42 and the driving section 45), the screw plug anti-back tooth 19 can be matched with the self-breaking groove 42, the screw plug anti-back tooth 19 is in a specially designed structure, the screw thread section 41 of the screw plug 4 can smoothly pass through the screw plug anti-back tooth 19, after the self-breaking groove 42 of the screw plug 4 is positioned at the screw plug anti-back tooth 19 at the upper end of the rod connecting seat 1, the screw plug anti-back tooth 19 is slightly deformed (i.e. radially bent) by pressing the screw plug anti-back tooth 19 through a tool, so that the screw plug anti-back tooth 19 is limited in the self-breaking groove 42, thus the screw plug 4 can be prevented from falling and losing in the transportation process or the operation, the configuration of a screw plug pre-holding tool (i.e. a pre-locking screwdriver) can be reduced, the weight of a tool kit can be lightened, and the cost can be reduced. The screw stopper retreat preventing teeth 19 may be uniformly distributed on the upper end surface of the rod connecting socket 1, and the number thereof may be 6 in fig. 4(b) and 4 in fig. 4 (c).
In order to facilitate the connection and fixation of tools such as a rod placing device and the like on the rod connecting seat 1, the upper end of the rod connecting seat 1 can be provided with a tool matching groove 17, the shape of the tool matching groove 17 can be flexibly arranged according to the needs in the operation, in the embodiment shown in fig. 4, the tool matching groove 17 is an annular groove, and the positioning ring 61 of the connecting rod anti-falling part 6 can be sleeved at the annular groove. In the modified structure shown in fig. 4(c), and in the embodiment shown in fig. 11 to 15, the tool engagement grooves 17 are a pair of recesses located on both sides of the stick attachment base 1.
When the rod connecting seat 1 is used for placing a rod, tools such as a rod placing device are firstly pulled and fixed on the tool matching groove 17 of the rod connecting seat 1, the connecting rod 5 is pulled to the working center of the C-shaped groove 10 of the rod connecting seat 1 along the guide opening 15 by the moving arm of the rod placing device, and then the screw plug plum blossom 44 at the tail part of the screw plug 4 is driven by the screwdriver, so that the screw plug 4 compresses the connecting rod 5 to achieve the final locking state.
In another aspect, the present invention provides a pedicle screw, as shown in embodiment 1 of fig. 2-14, comprising a screw seat and a screw body 3, wherein the screw seat is the rod connecting seat 1. Since the structure of the stick connecting seat 1 is the same as above, it will not be described herein again.
According to the pedicle screw, the connecting rod anti-falling piece is used for the rod connecting seat with the side opening, the rod connecting seat is provided with the C-shaped groove with the side opening for placing the connecting rod, the 'mouth expansion' condition is avoided, the connecting rod does not need to span a larger distance or turn over the height of the rod connecting seat when the rod is loaded or placed in an operation, the rod is loaded or placed easily, and the rod placing process is simple, convenient, rapid and safe; the connective bar anticreep piece is including being used for the location to connect in the location portion of excellent connecting seat upper end and being connected from excellent connecting seat lateral surface downwardly extending with location portion and being used for blockking the barrier portion that the connective bar deviates from in the C-slot, like this at the in-process of locking connective bar, the barrier portion can block that the connective bar deviates from in the C-slot, and the fastener can firmly be fixed the connective bar in the C-slot, reduces the risk of operation.
The inventor finds that the existing pedicle screw has a structure that the screw seat and the screw body are usually integrated, when the screw is placed, the screw seat and the screw body need to be placed into an operation position at the same time, the visual field is narrow due to the existence of the screw seat, the operation of placing the screw by a doctor is inconvenient, and the muscle tissue is easily irritated to cause damage, so that the pain of a patient is increased, and the time in the screw placing process is increased. To solve this problem, the present finding preferably takes the following structural form:
as shown in fig. 3-5 and 8-9, the upper end of the nail body 3 may be provided with a ball head 31, a mounting hole 100 communicating with the C-shaped groove 10 and used for accommodating the ball head 31 is arranged below the rod connecting seat 1, a gasket 2 capable of moving up and down is arranged in the mounting hole 100, the gasket 2 is provided with a ball socket 25 matched with the ball head 31, the gasket 2 is provided with a plurality of longitudinal slots 24 capable of elastically expanding the gasket 2, the gasket 2 is expanded by the ball head 31 after the ball head 31 enters the mounting hole 100 (shown in fig. 10 (C), specifically, the diameter C1 of the ball head 31 is equal to the inner diameter B3 of the ball socket 25 of the gasket 2, the diameter C1 of the ball head 31 is smaller than the aperture a1 of the through hole 11 at the lower end of the mounting hole 100, the size a2 at the middle of the mounting hole 100 is larger than the maximum outer diameter B2 when the gasket 2 is not expanded, the diameter C1 of the ball head 31 is larger than the inner diameter B1 when the gasket 2 is not expanded), and both form a ball-socket fit structure (shown in fig. 10 (d), when the ball 31 moves downward and is separated from the mounting hole 100 (as shown in fig. 10 (e)), the gasket 2 moves downward along with the ball 31 so that the ball 31 is clamped at the lower opening (i.e. the through hole 11) of the mounting hole 100 (specifically, the sum of the width C2 of the lower end of the ball 31 and the thicknesses of the two sides of the lower end of the gasket 2 is greater than the aperture a1 of the lower opening of the mounting hole 100).
To prevent the spacer 2 from coming out of the mounting hole 100, the diameter a1 of the lower end opening of the mounting hole 100 is preferably smaller than the maximum outer diameter B2 when the spacer 2 is not spread. Therefore, the gasket 2 can be pre-installed in the installation hole 100 of the rod connecting seat 1 before delivery, and delivered as a component of the system, so that the operation steps of a doctor in an operation are simplified, the operation efficiency is improved, and the doctor is helped to complete the operation simply, conveniently and quickly.
In the embodiment shown in fig. 4-5, the opening of the C-shaped groove 10 of the rod connecting socket 1 may be provided with a guide groove 15 to facilitate guiding the connecting rod 5 into the C-shaped groove 10; the mounting hole 100 may include a via hole 11 at a lower end, an expansion limiting groove 13 at a middle portion, and a fitting hole 14 at an upper portion; the outer surface of the gasket 2 may include an outer mating surface 22 at a lower portion to mate with the through hole 11, an expansion limiting surface 23 at a middle portion to mate with the expansion limiting groove 13, and a mating axial surface 28 at an upper portion to mate with the mating hole 14.
When the nail connecting seat is used in an operation, the nail body 3 can be firstly placed on a corresponding vertebral body, after the nail is placed, the rod connecting seat 1 provided with the gasket 2 and the screw plug 4 is placed on the ball head 31 at the upper end of the nail body 3 (as shown in (a) in fig. 10), the straight body surface of the through hole 11 of the mounting hole 100 firstly contacts the upper part of the ball head 31 of the nail body 3, the ball head 31 pushes the gasket 2 to move upwards in the mounting hole 100 (as shown in (b) in fig. 10) along with the continuous movement (towards the direction of the nail body 3) of the rod connecting seat 1), when the expansion limiting surface 23 on the outer surface of the gasket 2 is positioned in the expansion limiting groove 13 in the middle of the mounting hole 100, the expansion limiting groove 13 is matched with the expansion limiting surface 23 to block the gasket 2 to move upwards, and along with the continuous downward movement of the rod connecting seat 1, the outer matching surface 22 and the limiting surface 26 of the gasket 2 are propped open by the ball head 31 (as shown in (c) in fig. 10) under the action of the longitudinal open groove 24, the ball head 31 enters the ball socket 25 of the shim 2 through the ball head limiting surface 26 to form a ball head-ball socket matching structure (as shown in fig. 10 (d)), the implantation of the pedicle screw is completed, and then the connecting rod 5 is locked and fixed in the C-shaped groove 10 according to the conventional technology.
According to the pedicle screw, the rod connecting seat (screw seat) and the screw body are of a split structure, when the screw is placed, the rod connecting seat and the screw body are not required to be placed into an operation part at the same time, the screw body can be placed into a corresponding vertebral body firstly, the rod connecting seat is not attached, the size is small, the visual field is wide, the screw placing operation of a doctor is facilitated, the damage caused by irritation to muscle tissues can be reduced or avoided when the screw is placed, the safety of operation treatment and the accuracy of the screw placing are greatly improved, the pain of a patient is relieved, and the time in the screw placing process is shortened; the special design of the gasket can make the matching axial surface 28 minimum, thereby making the matching hole 14 of the mounting hole 100 minimum, ensuring the thickness and strength of the rod connecting seat 1 and improving the safety performance.
The upper end of the gasket 2 may be provided with a rod bearing portion 27, when the connecting rod 5 is locked in the C-shaped groove 10, the lower end of the gasket 2 is located at the lower end opening (i.e. the through hole 11) of the mounting hole 100, and in the process of locking the connecting rod 5 in the C-shaped groove 10 in operation, the connecting rod 5 presses the rod bearing portion 27 of the gasket 2 downward, so that the gasket 2 moves downward, so that the matching structure formed by the ball head 31 and the ball socket 25 moves downward, because the sum of the width C2 of the lower end of the ball head 31 and the thicknesses of both sides of the lower end of the gasket 2 is greater than the aperture a1 of the lower end opening of the mounting hole 100, the through hole 11 of the mounting hole 100 presses the outer matching surface 22 of the gasket 2 (as shown in (e) in fig. 10, thereby axially contracting the outer matching surface 22, further making the ball socket 25 and the ball head 31 tightly embrace, finally forming self-locking, and achieving final locking fixation.
In order to facilitate the installation of the through hole 11 of the hole 100 to extrude the outer fitting surface 22 of the gasket 2, and further facilitate the ball socket 25 to hold the ball head 31 tightly, the present embodiment may have the following structural form:
structural form one (not shown): the inner surface of the lower end opening of the mounting hole is provided with a first oblique conical surface, and the outer surface of the lower end of the gasket is provided with a second oblique conical surface matched with the first oblique conical surface;
structural form two (not shown): the inner surface of the lower end opening of the mounting hole is provided with a first arc surface, and the outer surface of the lower end of the gasket is provided with a second arc surface matched with the first arc surface.
As shown in fig. 4-5, a vertical guiding rotation-preventing platform 21 may be disposed on the rod bearing portion 27, a guiding rotation-preventing groove 12 matched with the guiding rotation-preventing platform 21 is disposed on a side surface of the C-shaped groove 10 on the rod connecting base 1, when the gasket 2 is installed in the installation hole 100 of the rod connecting base 1 through the via hole 11, the gasket 2 enters a corresponding position along the guiding rotation-preventing groove 12 on the side surface of the C-shaped groove 10 through the guiding rotation-preventing platform 21 on the rod bearing portion 27, and simultaneously, the degree of freedom of axial rotation of the gasket 2 in the installation hole 100 is limited, so that the time for attaching the connecting rod attaching surface (i.e., the upper end surface of the rod bearing portion 27) on the rod bearing portion 27 to the connecting rod 5 is reduced, and the time in the process of nail placement is further shortened.
As shown in fig. 5 (c), the longitudinal slot 24 is preferably in the shape of an elongated bell; the root of the longitudinal slot 24 can be provided with a round opening, so that the design of a round hole lengthened strip bell mouth can ensure that the gasket 2 cannot be plastically yielding when the gasket 2 is loaded into the mounting hole 100 of the rod connecting seat 1 and the ball head 31 at the upper end of the nail body 3 is loaded into the ball socket 25 of the gasket 2, thereby improving the elastic strength and ensuring the safety performance.
As shown in fig. 6, in the improved structure, the inner surface of the ball socket 25 of the spacer 2 may be provided with a plurality of transverse grooves 29 to increase the friction force between the ball socket 25 and the ball head 31 of the nail body 3, so that after the screw plug 4 finally locks the connecting rod 5, the overall strength of the pedicle screw is increased, thereby reducing the risk of slippage between the post-operation ball head 31 and the spacer 2, improving the firmness between the ball head 31 and the spacer 2, and providing reliable safety guarantee for medical staff and patients. In order to further improve the firmness between the ball head 31 and the gasket 2, a spiral groove or an annular groove or a parallel groove may be formed on the ball head 31, so that the gasket 2 and the ball head 31 are held more tightly.
As shown in fig. 8, the thread 32 on the nail body 3 is preferably designed with a double taper from the tip to the tail, and the peak of the thread 32 is gradually increased to increase the holding force between the nail body 3 and the vertebral body and improve the fixing strength. The nail tip of the nail body 3 can be provided with a self-tapping groove 33, so that bone chips can be discharged conveniently, and the nail placing speed is increased.
The inventor also finds that in the existing spinal surgery process, when long-stage surgery is performed, the length of the connecting rod used in the conventional surgery is often insufficient, or the strength of the connecting rod used in the conventional surgery is not enough, so that the difficulty of the surgery can be increased, the surgery time can be prolonged, the risk of surgery safety can be brought to a patient, and the pain of the patient can be increased. To solve this problem, the pedicle screw of the invention may also have the following embodiments, depending on the structural form of the pedicle screw:
example 2
As shown in fig. 11, the two C-shaped grooves of the rod connecting seat of the pedicle screw may be arranged in a back-to-back manner, and the positioning ring of the positioning portion of the connecting rod detachment prevention member is sleeved on the upper end of the whole rod connecting seat. In this embodiment, only one of the C-shaped grooves is provided with a nail body below, the nail body is also matched with the mounting hole through a gasket, and the gasket and the mounting hole have the same specific structure as that of embodiment 1, which is not described herein again, and the mounting hole is not provided below the C-shaped groove which is not provided with the nail body.
Example 3
As shown in fig. 12, the structure of the present embodiment is substantially the same as that of embodiment 2, except that: the C-shaped groove of the rod connecting seat can be one and the back of the C-shaped groove is provided with a U-shaped groove for placing another connecting rod, a fastener for fixing the other connecting rod is arranged above the U-shaped groove, a boss part 10 'can be arranged above the C-shaped groove on the rod connecting seat, the positioning ring of the positioning part of the connecting rod anti-falling part can only be sleeved on the upper end of the C-shaped groove side of the rod connecting seat, and the boss part 10' can be sleeved with the positioning ring. In this embodiment, only the lower part of the C-shaped groove is provided with the nail body, the nail body is matched with the mounting hole through the gasket, the specific structure of the gasket and the mounting hole is the same as that of embodiment 1, the description is omitted, and the mounting hole is not arranged below the U-shaped groove.
Example 4
As shown in fig. 13 to 14, the structure of the present embodiment is substantially the same as that of embodiment 3, except that: the nail body is positioned below the U-shaped groove, but not below the C-shaped groove. In this embodiment, the positioning portion of the connecting rod detachment prevention member 6 extends up to the U-shaped groove, i.e., when the connecting rod detachment prevention member 6 is used, the positioning portion is provided on the entire rod connecting seat.
In this embodiment, the two vertical guiding rotation-preventing tables 21 are arranged on the rod bearing portion 27 of the gasket 2 along the radial direction, and the two side surfaces of the lower portion of the U-shaped groove 10 of the rod connecting seat 1 are both provided with the guiding rotation-preventing grooves 12 matched with the guiding rotation-preventing tables 21, so that the degree of freedom of the axial rotation of the gasket 2 in the mounting hole 100 is further limited, thereby reducing the time for attaching the connecting rod attaching surface (i.e., the upper end surface of the rod bearing portion 27) on the rod bearing portion 27 to the connecting rod 5, and further shortening the time in the nail placing process.
Example 5
As shown in fig. 15, the structure of the present embodiment is substantially the same as that of embodiment 3, except that: the bottom of the rod connecting seat can be provided with a transverse extending part, the transverse extending part is provided with another rod connecting seat 7, the other rod connecting seat 7 is provided with a U-shaped groove, a fastening piece used for fixing the other connecting rod is arranged above the U-shaped groove, and the positioning ring of the positioning part of the connecting rod anti-release piece is sleeved at the upper end of the rod connecting seat 1 directly connected with the nail body.
In this embodiment, the end of the transverse extension portion may be provided with a ball head, the lower end of the other rod connecting seat 7 may be provided with a mounting hole for accommodating the ball head, a gasket 8 is provided in the mounting hole, and the fitting form of the ball head, the gasket 8 and the mounting hole at the lower end of the rod connecting seat 7 may refer to the structure configuration of embodiment 1, which is not described herein again. Thus, the universal adjustment of the rod connecting seat 7 can be realized, and the rod can be more conveniently placed.
In summary, the embodiments 1 to 5 of the present invention are modular pedicle screws suitable for scoliosis surgery, which greatly improve the safety of scoliosis surgery treatment and the accuracy of screw placement, and the operation process is simple and convenient to operate, and the intuition during surgery is good, and there is no "mouth expansion" and no "extrusion" of the connection rod from the C-shaped groove during screwing in of the screw plug, thereby improving the safety performance of pedicle screws. The screw plug and the gasket can be combined with the rod connecting seat in advance to form an assembly, so that the risk of dropping and losing the screw plug and the gasket in the product transportation and operation processes is avoided, the configuration of a screw plug pre-holding tool is reduced, a tool box is simplified, the weight is lightened, the cost is reduced, the operation steps in the doctor operation are simplified, and the operation time is shortened.
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 (14)
1. The utility model provides a connective bar anticreep spare for open-sided stick connecting seat, its characterized in that, the stick connecting seat has the side opening and is used for placing the C-shaped groove of connective bar, connective bar anticreep spare is including being used for the location to connect and is in location portion of stick connecting seat upper end and with location portion connection follow stick connecting seat side downwardly extending is used for blockking the connective bar and follows the part that blocks that deviates from in the C-shaped groove.
2. A connecting rod separation preventing member according to claim 1, wherein the positioning portion is a positioning ring fitted over an upper end of the rod connecting seat;
and/or the blocking part comprises a first limiting rod positioned on one side of the connecting rod close to the opening of the C-shaped groove.
3. A connector rod release preventing member according to claim 2, wherein said blocking portion further comprises a second stopper rod located on a side of the connector rod away from the opening of the C-shaped groove.
4. A connecting rod release preventing member according to claim 3, wherein the first position-limiting rods are a pair and are provided on both sides of the rod connecting seat in a length direction of the connecting rod;
and/or the second limiting rods are a pair and are arranged on two sides of the rod connecting seat along the length direction of the connecting rod;
and/or the positioning ring is provided with a downward extending extension part.
5. A rod connecting socket, characterized in that the rod connecting socket has a C-shaped groove with a side opening for placing a connecting rod, a fastening member for fixing the connecting rod is provided above the C-shaped groove, and the rod connecting socket is provided with a connecting rod falling-off preventing member as claimed in any one of claims 1 to 4.
6. The rod connecting socket according to claim 5, wherein an outer surface of the rod connecting socket is provided with a longitudinal groove for receiving the first and/or second stop bar of the blocking portion.
7. The rod connecting seat according to claim 5, wherein a threaded hole communicating with the C-shaped groove is formed in the rod connecting seat, the fastening member is a plug screw threadedly connected in the threaded hole, and a protrusion is formed in the middle of the lower end surface of the plug screw.
8. The rod connecting seat according to claim 7, wherein the upper end of the rod connecting seat is provided with screw plug anti-back teeth which can be bent along the radial direction of the threaded hole;
and/or the upper end of the rod connecting seat is provided with a tool matching groove;
and/or the screw plug comprises a threaded section positioned at the lower part and a driving section positioned at the upper part, and a self-breaking groove is arranged between the threaded section and the driving section.
9. A pedicle screw, comprising a screw seat and a screw body, wherein the screw seat is the rod connecting seat of any one of claims 5-8.
10. The pedicle screw according to claim 9, wherein a ball head is provided at the upper end of the screw body, a mounting hole communicating with the C-shaped groove and used for accommodating the ball head is provided below the rod connecting seat, a gasket capable of moving up and down is provided in the mounting hole, the gasket is provided with a ball socket matching with the ball head, the gasket is provided with a plurality of longitudinal slots capable of elastically expanding the gasket, the gasket is expanded by the ball head after the ball head enters the mounting hole, the gasket and the ball socket form a ball head-ball socket matching structure, and when the ball head moves downwards to be separated from the mounting hole, the gasket moves downwards along with the ball head to enable the ball head to be clamped at the lower opening of the mounting hole.
11. The pedicle screw according to claim 10, wherein the spacer has an upper end provided with a rod receiving portion, and a lower end located at a lower end opening of the mounting hole when the connecting rod is locked in the C-shaped groove.
12. The pedicle screw according to claim 11, wherein a vertical guiding rotation-preventing platform is provided on the rod bearing part, and a guiding rotation-preventing groove matched with the guiding rotation-preventing platform is provided on a side surface of the C-shaped groove;
and/or the longitudinal groove is in a long-strip horn mouth shape;
and/or the root part of the longitudinal slot is provided with a round gap.
13. Pedicle screw according to claim 10, wherein the inner surface of the socket of the spacer is provided with several transverse grooves;
and/or a spiral groove or an annular groove is arranged on the ball head;
and/or the threads on the nail body are designed with double taper degrees from the nail tip to the nail tail, and the thread peaks are gradually enlarged.
14. The pedicle screw according to claim 10, wherein the C-shaped grooves of the rod attachment seat are two and are arranged back to back;
or the C-shaped groove of the rod connecting seat is one, the back of the C-shaped groove is provided with a U-shaped groove for placing another connecting rod, and a fastener for fixing the other connecting rod is arranged above the U-shaped groove;
or the bottom of the rod connecting seat is provided with a transverse extending part, the transverse extending part is provided with another rod connecting seat, the other rod connecting seat is provided with a U-shaped groove, and a fastener for fixing the other connecting rod is arranged above the U-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111518448.9A CN114224462B (en) | 2021-12-13 | 2021-12-13 | Connecting rod anti-drop piece, rod connecting seat and pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111518448.9A CN114224462B (en) | 2021-12-13 | 2021-12-13 | Connecting rod anti-drop piece, rod connecting seat and pedicle screw |
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| CN114224462A true CN114224462A (en) | 2022-03-25 |
| CN114224462B CN114224462B (en) | 2024-03-29 |
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| US20070055242A1 (en) * | 2005-07-27 | 2007-03-08 | Bailly Frank E | Device for securing spinal rods |
| CN201668484U (en) * | 2010-05-13 | 2010-12-15 | 中国人民解放军第一七五医院 | Atlantoaxial nail stick fixing device |
| US20180098796A1 (en) * | 2008-09-05 | 2018-04-12 | DePuy Synthes Products, Inc. | Bone Fixation Assembly |
| CN109745112A (en) * | 2019-03-05 | 2019-05-14 | 上海节惠生物科技有限公司 | A kind of screw kit structure |
| CN111202573A (en) * | 2020-02-22 | 2020-05-29 | 董谢平 | Dynamic pedicle screw capable of being pressurized in neutral mode and limiting tool thereof |
| CN112370138A (en) * | 2020-11-24 | 2021-02-19 | 朱晓东 | Orthopedic screw and system for scoliosis of children |
| CN112826581A (en) * | 2021-02-10 | 2021-05-25 | 北京理贝尔生物工程研究所有限公司 | Holding and taking device and self-breaking screw plug assembly with same |
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2021
- 2021-12-13 CN CN202111518448.9A patent/CN114224462B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070055242A1 (en) * | 2005-07-27 | 2007-03-08 | Bailly Frank E | Device for securing spinal rods |
| US20180098796A1 (en) * | 2008-09-05 | 2018-04-12 | DePuy Synthes Products, Inc. | Bone Fixation Assembly |
| CN201668484U (en) * | 2010-05-13 | 2010-12-15 | 中国人民解放军第一七五医院 | Atlantoaxial nail stick fixing device |
| CN109745112A (en) * | 2019-03-05 | 2019-05-14 | 上海节惠生物科技有限公司 | A kind of screw kit structure |
| CN111202573A (en) * | 2020-02-22 | 2020-05-29 | 董谢平 | Dynamic pedicle screw capable of being pressurized in neutral mode and limiting tool thereof |
| CN112370138A (en) * | 2020-11-24 | 2021-02-19 | 朱晓东 | Orthopedic screw and system for scoliosis of children |
| CN112826581A (en) * | 2021-02-10 | 2021-05-25 | 北京理贝尔生物工程研究所有限公司 | Holding and taking device and self-breaking screw plug assembly with same |
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| CN114224462B (en) | 2024-03-29 |
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