CN109077791B - Fixing screw for pedicle screw and pedicle screw suit - Google Patents
Fixing screw for pedicle screw and pedicle screw suit Download PDFInfo
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- CN109077791B CN109077791B CN201811300349.1A CN201811300349A CN109077791B CN 109077791 B CN109077791 B CN 109077791B CN 201811300349 A CN201811300349 A CN 201811300349A CN 109077791 B CN109077791 B CN 109077791B
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- 230000001154 acute effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 38
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000020307 Spinal disease Diseases 0.000 description 1
- 241001079814 Symphyotrichum pilosum Species 0.000 description 1
- 206010066901 Treatment failure Diseases 0.000 description 1
- 235000004224 Typha angustifolia Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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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
-
- 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
- A61B17/8695—Washers
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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)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides a fixing screw for a pedicle screw, and belongs to the field of medical appliances. The fixing screw for pedicle screw provided by the invention comprises: a main body, the periphery of which is provided with a plurality of single-circle grooves; and the backstop bulge is arranged on the inner wall of the single-circle groove of the thread groove at the preset height of the main body. When the screw is used, the main body is screwed into the mounting groove of the pedicle screw until the threads on the inner wall of the mounting groove of the pedicle screw enter the single-ring groove at the preset height of the main body, at the moment, the lower end of the main body just tightly presses and fixes the spine fixing rod in the mounting groove, the retaining bulge on the inner wall of the single-ring groove and the threads on the inner wall of the mounting groove on the other side of the single-ring groove are tightly clamped, and the fixation screw for the pedicle screw and the head of the pedicle screw are prevented from loosening. Pedicle screw kit comprising a pedicle screw set screw according to any of the above and a pedicle screw. By adopting the fixing screw for the pedicle screw, the operation of doctors is simplified, and the operation difficulty is reduced.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a fixing screw for a pedicle screw and a pedicle screw suit.
Background
Spinal vertebral lesions are common diseases and frequently-occurring diseases which afflict people, and the main operation for treating the diseases is to perform spinal focus excision and then perform spinal reconstruction. The procedure typically requires intraspinal fixation on the spine using a spinal stabilization system commonly known as a rod-and-staple system.
The structure of the current nail rod system is as follows: the vertebral pedicle screws are fixedly arranged on the vertebral column, and the vertebral column fixing rods are sequentially fixed with the vertebral pedicle screws, so that the reconstruction of the vertebral column is realized. Specifically, the fixing mode of the spine fixing rod and the pedicle screw is generally that the head of the pedicle screw is provided with a mounting groove, the spine fixing rod is embedded into the mounting groove, and then the spine fixing rod is tightly pressed and fixed in the mounting groove by using the fixing screw and the head of the pedicle screw, so that the spine fixing rod and the pedicle screw are fixed.
After the nail stick system is installed, the backbone of patient can take place certain crooked when the motion, can draw the backbone fixed stick on the backbone to produce and remove, leads to backbone fixed stick, set screw and pedicle screw three to promote each other, in the long run, can lead to the threaded connection of set screw and pedicle screw head to take place not hard up, influences treatment, leads to the treatment failure even.
In order to prevent the screw connection between the fixing screw and the pedicle screw head from loosening, a locking washer is added to the fixing screw, or a locking pin is inserted between the fixing screw and the pedicle screw head. However, since the pedicle screw is used in human surgery, the above-mentioned locking method requires an additional operation by a doctor in a limited operation space, which greatly increases the difficulty of the surgery.
Disclosure of Invention
The invention aims to provide a fixing screw for a pedicle screw, which aims to solve the technical problems of the prior art that the locking structure between the fixing screw and the head of the pedicle screw is inconvenient to operate in operation, and the operation difficulty is increased.
In order to achieve the above purpose, the invention adopts the following technical scheme: provided is a pedicle screw fixation screw, including:
the main body is provided with a plurality of single-ring grooves axially arranged along the main body, and adjacent single-ring grooves are communicated to form a thread groove; and
the retaining protrusion is arranged on the inner wall of the single-circle groove of the thread groove at the preset height of the main body.
Further, the thickness of the retaining protrusion gradually increases in the precession direction along the single turn groove.
Further, the backstop protrusion is arranged on the upper side wall and/or the lower side wall of the single-ring groove.
Further, the top surface of the retaining protrusion is a plane, the single-ring groove is provided with an included angle gamma between the side wall surface of the retaining protrusion and the top surface of the retaining protrusion, and the included angle gamma is an acute angle.
Further, the cross-sectional profile of the single-circle groove is rectangular, triangular or trapezoidal.
Further, the hardness of the backstop protrusion is lower than that of the screw thread matched with the single-circle groove; and/or the hardness of the backstop bulge is lower than that of the inner wall of the single-ring groove.
Further, in the direction from the bottom end to the top end of the main body, the groove width of the thread groove formed by the communication of the plurality of single-turn grooves is gradually reduced.
Further, the body predetermined height is equal to the depth L1 of the pedicle screw mounting slot minus the thickness L2 of the spinal fixation rod.
Further, the included angle between the rear end face of the backstop protrusion and the longitudinal section of the mounting groove is alpha, and the included angle is more than or equal to 90 degrees and more than or equal to 0 degrees.
Further, the included angle between the back end surface of the retaining protrusion and the top surface of the retaining protrusion is beta, and the included angle is more than or equal to 90 degrees and more than or equal to 60 degrees.
Further, the retaining projection has two or more protrusions arranged in the single turn groove precession direction.
The fixing screw for the pedicle screw has the beneficial effects that: compared with the prior art, the fixing screw for the pedicle screw is characterized in that when the fixing screw is used, the spine fixing rod is embedded into the installation groove of the pedicle screw, then the main body is screwed into the installation groove of the pedicle screw, threads on the inner wall of the installation groove rotate in the thread groove formed by the single-circle groove until the end head of the threads on the inner wall of the installation groove of the pedicle screw enters the single-circle groove at the preset height of the main body, at the moment, the spine fixing rod is just pressed and fixed in the installation groove by the lower end of the main body, and the retaining protrusions on the inner wall of the single-circle groove clamp the threads on the inner wall of the installation groove with other inner walls of the single-circle groove, so that the fixing screw for the pedicle screw and the head of the pedicle screw are prevented from loosening. The doctor only needs to screw the main part and can realize the locking of pedicle screw with set screw and pedicle screw, need not to carry out extra operation with the help of other apparatuses, easy operation can not increase the operation degree of difficulty yet.
The invention aims to provide a pedicle screw suit, which solves the technical problems of the prior art that the locking structure of a fixing screw and a pedicle screw head is inconvenient to operate in operation, and the operation difficulty is increased.
A pedicle screw set comprising a pedicle screw set screw as claimed in any one of the preceding claims and a pedicle screw.
The pedicle screw set provided by the invention has the beneficial effects that: compared with the prior art, the pedicle screw set has the advantages that the fixing screw for the pedicle screw is adopted, so that the operation of doctors is simplified, and the operation difficulty is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a pedicle screw fixation screw according to an embodiment of the invention;
FIG. 2 is a front view of a pedicle screw fixation screw according to an embodiment of the invention;
FIG. 3 is a view of the use of a pedicle screw package provided in an embodiment of the invention;
fig. 4 is a cross-sectional view of fig. 3.
Wherein, each reference sign in the figure:
10-a body; 11-single turn groove; 20-a backstop protrusion; 30-pedicle screws; 40-spinal fixation rod.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 4 together, a description will now be given of a fixing screw for a pedicle screw according to an embodiment of the invention. A set screw for a pedicle screw, comprising:
a main body 10, the periphery of which is provided with a plurality of single-circle grooves 11 arranged along the axial direction of the main body, and adjacent single-circle grooves 11 are communicated to form a thread groove; and
the stopping protrusion 20 is arranged on the inner wall of the single-turn groove 11 of the thread groove at the preset height of the main body 10.
Compared with the prior art, the fixing screw for the pedicle screw is characterized in that when the fixing screw is used, the spine fixing rod 40 is embedded into the installation groove of the pedicle screw 30, then the main body 10 is screwed into the installation groove of the pedicle screw 30, threads on the inner wall of the installation groove rotate in the thread groove formed by the single-circle groove 11 until the end of the threads on the inner wall of the installation groove of the pedicle screw 30 enters the single-circle groove 11 at the preset height of the main body 10, at the moment, the spine fixing rod 40 is just pressed and fixed in the installation groove by the lower end of the main body 10, and the ends of the threads on the inner wall of the installation groove are clamped by the retaining protrusions 20 on the inner wall of the single-circle groove 11 and the other inner walls of the single-circle groove 11, so that the fixing screw for the pedicle screw and the head of the pedicle screw 30 are prevented from loosening. The doctor only needs to screw the main part 10 and can realize the locking of pedicle screw with set screw and pedicle screw, need not to carry out extra operation with the help of other apparatuses, easy operation can not increase the operation degree of difficulty.
Specifically, when the main body 10 is screwed into the mounting groove but the lower end of the main body 10 is not yet abutted against the spinal fixation rod 40, the screw groove on the outer periphery of the main body 10 is in normal screw fit with the screw on the inner wall of the mounting groove, so that the main body 10 can be smoothly rotated. When the lower end of the main body 10 is pressed against the spinal fixation rod 40, the retaining projections 20 clamp the threads on the inner wall of the mounting groove, providing reverse resistance to the main body 10, preventing loosening. The main body 10 is cylindrical, a plurality of single-turn grooves 11 are coaxially and circumferentially arranged on the outer periphery of the main body 10, and the plurality of single-turn grooves 11 are axially arranged along the main body 10 and mutually communicated to form a thread groove. When the main body 10 is screwed into the installation groove of the head of the pedicle screw 30 and compresses the spinal fixation rod 40, the length of the lower end of the main body 10 entering the installation groove is not only the preset height of the main body 10, so that the screw thread on the inner wall of the installation groove enters the single-circle groove 11 provided with the stop protrusion 20 while the lower end of the main body 10 is compressed to the spinal fixation rod 40, and the stop protrusion 20 clamps the screw thread on the inner wall of the installation groove. The inner wall of the single turn groove 11 includes an upper side wall of the single turn groove 11, a lower side wall of the single turn groove 11, and a groove bottom of the single turn groove 11. The upper side wall of the single-circle groove 11, the lower side wall of the single-circle groove 11 and the groove bottom of the single-circle groove 11 can be provided with retaining protrusions 20, or the retaining protrusions 20 can be arranged on one or two of the three.
Referring to fig. 1 to 4 together, as an embodiment of the fixing screw for pedicle screws according to the invention, the thickness of the retaining protrusion 20 gradually increases in the direction of the single turn groove 11. The screwing direction refers to the movement direction of the screw thread on the inner wall of the installation groove in the single turn groove 11 when the main body 10 is screwed into the installation groove, that is, the arrow in fig. 1 and 2 points to the screwing direction of the single turn groove 11.
Referring to fig. 1 to 3 together, as an embodiment of the fixing screw for pedicle screws according to the invention, retaining protrusions 20 are provided on the upper and/or lower side walls of the single-turn groove 11.
Specifically, the areas of the upper side wall and the lower side wall of the single-turn groove 11 are larger, larger retaining protrusions 20 can be arranged, the contact area between the retaining protrusions 20 and threads on the inner wall of the mounting groove is increased, friction is increased, the depth of the single-turn groove 11 can be increased if necessary, the areas of the upper side wall and the lower side wall are larger, and larger retaining protrusions 20 are arranged. Because the top of the thread on the inner wall of the mounting groove is pointed, the bearing capacity is smaller, the areas of the upper side surface and the lower side surface of the thread on the inner wall of the mounting groove are larger, the bearing capacity is relatively better, and the retaining protrusion 20 is arranged on the upper side wall of the single-circle groove 11, so that the retaining protrusion 20 can be abutted with the upper side surface of the thread on the inner wall of the mounting groove; the backstop bulge 20 is arranged on the lower side wall of the single-ring groove 11, so that the backstop bulge 20 can be abutted with the lower side surface of the thread on the inner wall of the mounting groove, the stress structure is more reasonable, and the thread on the inner wall of the mounting groove is prevented from being damaged.
In addition, the retaining protrusion 20 is disposed on the lower side wall of the single-turn groove 11, so that the top surface of the retaining protrusion 20 can be abutted against the lower side surface of the thread on the inner wall of the installation groove, the thread on the inner wall of the installation groove pushes the main body 10 into the installation groove through the retaining protrusion 20, and the compression force of the bottom end of the main body 10 to the spinal fixing rod 40 is increased.
When the retaining protrusions 20 are arranged on the upper side wall and the lower side wall of the single-ring groove 11, the threads on the inner wall of the mounting groove are clamped together by the retaining protrusions 20 on the upper side wall and the lower side wall of the single-ring groove 11 after the threads on the inner wall of the mounting groove enter the single-ring groove 11.
Referring to fig. 1 and 2 together, as a specific embodiment of the fixing screw for pedicle screws provided by the invention, the top surface of the retaining protrusion 20 is a plane, and the side wall surface of the single-ring groove 11 provided with the retaining protrusion 20 and the top surface of the retaining protrusion 20 form an included angle γ, and the included angle γ is an acute angle.
Specifically, 30 degrees or more than or equal to gamma, or 20 degrees or more than or equal to gamma, or 15 degrees or more than or equal to gamma. So that the rotational resistance of the main body 10 is gradually increased, and a doctor can sense that the pedicle screw is rotated in place by the fixing screw through the change of the rotational resistance of the main body 10. So that the retaining protrusion 20 does not directly block the rotation of the main body 10, and when the retaining protrusion 20 abuts against the threads on the inner wall of the installation groove, the main body 10 can also rotate to a certain extent to adjust the pressure of the main body 10 on the spinal fixing rod 40 and the pressure between the retaining protrusion 20 and the threads on the inner wall of the installation groove.
Referring to fig. 1 to 4 together, as an embodiment of the fixing screw for pedicle screws according to the present invention, the cross-sectional profile of the single-turn groove 11 is rectangular, triangular or trapezoidal.
Specifically, the cross-sectional profile of the single turn groove 11 may be selected to take a rectangular shape, a triangular shape or a trapezoidal shape according to the profile of the threads on the inner wall of the installation groove.
Referring to fig. 1 to 4 together, as an embodiment of the fixing screw for pedicle screw provided by the present invention, the retaining protrusion 20 has a hardness lower than that of the screw thread engaged with the single turn groove 11.
Specifically, the hardness of the threads on the inner wall of the installation groove is greater than that of the retaining protrusion 20, so that when the main body 10 is screwed into the installation groove, after the threads on the inner wall of the installation groove are abutted against the retaining protrusion 20, the retaining protrusion 20 is extruded and deformed by the threads on the inner wall of the installation groove, so that the main body 10 can continue to rotate for a certain angle, and the compression force of the lower end of the main body 10 to the spinal fixing rod 40 is increased.
Referring to fig. 1 to 4 together, as an embodiment of the fixing screw for pedicle screws according to the invention, the retaining protrusion 20 has a hardness lower than that of the inner wall of the single-turn groove 11.
Specifically, after the retaining protrusion 20 abuts against the thread on the inner wall of the mounting groove, the retaining protrusion 20 is prevented from crushing the inner wall of the single-turn groove 11, so that the single-turn groove 11 is deformed and damaged.
In this case, the retaining protrusion 20 may be disposed on the lower sidewall of the single-turn groove 11, and when the spinal fixing rod 30 is twisted, the spinal fixing rod 30 may press the pedicle screw upward, and the pedicle screw transmits pressure to the harder upper sidewall of the single-turn groove 11 by using the fixing screw, thereby avoiding the compression deformation of the retaining protrusion 20 by using the fixing screw, and reducing the clamping force of the retaining protrusion 20 to the screw thread of the pedicle screw.
Referring to fig. 1 to 4 together, as a specific embodiment of the fixing screw for pedicle screw according to the invention, in the direction from the bottom end to the top end of the main body 10, the width of the thread groove formed by the communication of the plurality of single-turn grooves 11 is gradually reduced, that is, the distance between the upper side wall and the lower side wall of the thread groove is gradually reduced, so that the upper side wall and the lower side wall of the thread groove can gradually clamp the thread on the inner wall of the installation groove when the thread on the inner wall of the installation groove enters the thread groove formed by the communication of the single-turn grooves 11 from bottom to top. More specifically, the retaining protrusions 20 may be disposed on the upper side walls of the single-turn grooves 11, and in use, the lower side walls of the single-turn grooves 11 are abutted against the lower side surfaces of the inner wall threads of the installation groove, and a gap is formed between the upper side walls of the single-turn grooves 11 and the upper side surfaces of the inner wall threads of the installation groove, so that the top surfaces of the retaining protrusions 20 are abutted against the upper side surfaces of the inner wall threads of the installation groove.
Referring also to fig. 4, as an embodiment of the pedicle screw fixation screw according to the invention, the body 10 has a predetermined height equal to the depth L1 of the mounting slot of the pedicle screw 30 minus the thickness L2 of the spinal fixation rod 40.
Specifically, the threads on the inner wall of the mounting groove extend to the opening at the top of the mounting groove. When the main body 10 is screwed into the installation groove of the head of the pedicle screw 30 and compresses the spinal fixation rod 40, a portion below a predetermined height of the main body 10 enters the installation groove, the thread at the top of the inner wall of the installation groove enters the single-turn groove 11 at the predetermined height of the main body 10, so that the thread on the inner wall of the installation groove enters the single-turn groove 11 provided with the retaining protrusion 20 while the lower end of the main body 10 is compressed against the spinal fixation rod 40, and the retaining protrusion 20 clamps the thread on the inner wall of the installation groove.
Referring to fig. 1 and 2 together, as a specific embodiment of the fixing screw for pedicle screw provided by the invention, the included angle between the rear end surface of the retaining protrusion 20 and the longitudinal section of the mounting groove is alpha, 90 degrees > alpha is greater than or equal to 0 degrees.
Referring to fig. 1 and 2 together, as a specific embodiment of the fixing screw for pedicle screws provided by the invention, an included angle between the rear end surface of the retaining protrusion 20 and the top surface of the retaining protrusion 20 is beta, and 90 degrees or more is beta or more than 60 degrees.
Specifically, the strength of the retaining protrusion 20 is ensured, the top of the retaining protrusion 20 is prevented from being broken, scraps are generated to influence the operation, and the locking effect is not achieved.
As a specific embodiment of the fixing screw for pedicle screw provided by the invention, the retaining projection 20 has two or more arranged along the screwing direction of the single turn groove 11.
Specifically, two or more single-turn grooves 11 may be sequentially arranged on the lower side wall of the single-turn groove 11 at a predetermined height of the main body 10, or may be sequentially arranged on the upper side wall of the single-turn groove 11 at a predetermined height of the main body 10.
Referring to fig. 3 and 4 together, a pedicle screw set includes a pedicle screw set screw according to any of the above and a pedicle screw 30.
Compared with the prior art, the pedicle screw set has the advantages that the fixing screw for the pedicle screw is adopted, so that the operation of doctors is simplified, and the operation difficulty is reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. A pedicle screw fixation screw, comprising:
a main body (10), wherein a plurality of single-ring grooves (11) are arranged along the axial direction of the main body, and adjacent single-ring grooves (11) are communicated to form thread grooves; and
a retaining projection (20) provided on the inner wall of the single-turn groove (11) at a predetermined height of the main body (10);
the thickness of the retaining projection (20) increases gradually in the direction of precession along the single turn groove (11).
2. The pedicle screw fixation screw as claimed in claim 1, wherein: the retaining protrusion (20) is arranged on the upper side wall and/or the lower side wall of the single-ring groove (11).
3. The pedicle screw fixation screw as claimed in claim 2, wherein: the top surface of the retaining protrusion (20) is a plane, the single-ring groove (11) is provided with an included angle gamma between the side wall surface of the retaining protrusion (20) and the top surface of the retaining protrusion (20), and the included angle gamma is an acute angle.
4. A pedicle screw fixation screw as claimed in claim 3, wherein: the cross section outline of the single-ring groove (11) is rectangular, triangular or trapezoidal.
5. The pedicle screw set screw as claimed in any one of claims 1-2, wherein: the hardness of the backstop bulge (20) is lower than that of a thread matched with the single-circle groove (11); and/or the hardness of the backstop bulge (20) is lower than the hardness of the inner wall of the single-ring groove (11).
6. The pedicle screw set screw as claimed in any one of claims 1-2, wherein: in the direction from the bottom end to the top end of the main body (10), the groove width of a thread groove formed by communicating a plurality of single-turn grooves (11) is gradually reduced.
7. The pedicle screw set screw as claimed in any one of claims 1-2, wherein: the body (10) has a predetermined height equal to the depth L1 of the pedicle screw mounting slot minus the thickness L2 of the spinal fixation rod (40).
8. The pedicle screw set screw as claimed in any one of claims 1-2, wherein: the included angle between the rear end surface of the retaining protrusion (20) and the top surface of the retaining protrusion (20) is beta, and the beta is more than or equal to 90 degrees and more than or equal to 60 degrees.
9. Pedicle screw set, characterized in that it comprises a pedicle screw set screw according to any of claims 1 to 8 and a pedicle screw (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300349.1A CN109077791B (en) | 2018-11-02 | 2018-11-02 | Fixing screw for pedicle screw and pedicle screw suit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300349.1A CN109077791B (en) | 2018-11-02 | 2018-11-02 | Fixing screw for pedicle screw and pedicle screw suit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109077791A CN109077791A (en) | 2018-12-25 |
| CN109077791B true CN109077791B (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811300349.1A Active CN109077791B (en) | 2018-11-02 | 2018-11-02 | Fixing screw for pedicle screw and pedicle screw suit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109077791B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2776320Y (en) * | 2005-04-06 | 2006-05-03 | 山东威高骨科材料有限公司 | Vertebral arch root screw spike |
| CN103327918A (en) * | 2011-01-21 | 2013-09-25 | 新特斯有限责任公司 | Trochanteric femoral nail augmentable |
| CN106028988A (en) * | 2013-12-23 | 2016-10-12 | 史密夫和内修有限公司 | Distal radius plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040049197A1 (en) * | 1994-12-08 | 2004-03-11 | Jose Vicente Barbera Alacreu | Dorsolumbar and lumbosacral vertebral fixation system |
| US8663289B2 (en) * | 2009-10-29 | 2014-03-04 | Warsaw Orthopedic, Inc. | Pedicle screw head extender |
-
2018
- 2018-11-02 CN CN201811300349.1A patent/CN109077791B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2776320Y (en) * | 2005-04-06 | 2006-05-03 | 山东威高骨科材料有限公司 | Vertebral arch root screw spike |
| CN103327918A (en) * | 2011-01-21 | 2013-09-25 | 新特斯有限责任公司 | Trochanteric femoral nail augmentable |
| CN106028988A (en) * | 2013-12-23 | 2016-10-12 | 史密夫和内修有限公司 | Distal radius plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109077791A (en) | 2018-12-25 |
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