CN108498155A - A kind of anti-rotation pedicle screw of self-locking and its application method - Google Patents
A kind of anti-rotation pedicle screw of self-locking and its application method Download PDFInfo
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- CN108498155A CN108498155A CN201810385391.1A CN201810385391A CN108498155A CN 108498155 A CN108498155 A CN 108498155A CN 201810385391 A CN201810385391 A CN 201810385391A CN 108498155 A CN108498155 A CN 108498155A
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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
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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
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
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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
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
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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
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention belongs to technical field of medical equipment, more particularly to a kind of anti-rotation pedicle screw of self-locking and its application method, including integrally formed screw tail portion and screw body, screw tail portion top offers U-lag, screw tail portion upper surface offers the first blind hole, first blind hole inner wall is equipped with the first internal thread, screw body outer wall is equipped with the first external screw thread, screw body is equipped with the second blind hole in the first blind via bottom, middle bar is equipped in second blind hole, middle bar is threadedly coupled with screw body, middle bar lower end is in up big and down small pyramidal structure, screw body lower part radial symmetric is set there are two notch, the height dimension of inner side is more than the height dimension on the outside of notch, bail is equipped in notch, expose screw body outer wall in bail outer end, second boss is equipped on the inside of bail upper surface.It, which has, dramatically increases the fixed stability of pedicle screw, improves pedicle screw axial direction resisting pull out forces, and screw is not easy to loosen and exit, the low advantage of broken nail, disconnected stick incidence.
Description
Technical field
The invention belongs to technical field of medical equipment, and in particular to a kind of anti-rotation pedicle screw of self-locking and its user
Method.
Background technology
Osteoporosis (osteoporosis, OP) be a kind of low, bone micro-structure with bone amount destroys, bone brittleness increases,
Bone strength declines, systemic, metabolic bone systemic disease that fracture is characterized easily occurs.The female in U.S. in 2004 50 years old or more
Property, male's OP illness rates be 13%-18%, 3%-6%, women, the illness rate of male in 50 years old or more, Europe in 2010 are
21%, 6%.The total prevalence rate women in the end of the year 2014, China 50 years old or more OP is 20.7%, and male 14.4%.50 years old or more
Low BMD crowd male 57.6%, women 64.6%.OP features：1. risk of bone fracture obviously increases, 2. interior fixed easily loosening, abjection
Or broken nail breaks stick, 3. healing time is long or disunion, and 4. bone grafting easily absorbs, and 5. activity reduces, accelerates bone information, aggravates
OP, 6. resets difficulty after fracture site, second fracture risk is big.Document report OP Unstable internal fixation rates are up to 18% -63%.
The Osteoporotic vertebral fracture expectant treatment death rate increases by 23%, surgical intervention：1. plain screw is fixed：Increase
Pedicle screw diameter, length and increase fixed-segment, wound is big, and operation risk increases, and screw loosening exits, broken nail, disconnected stick
Incidence obviously increases；2. convex after percutaneous vertbroplasty (percutaneousvertebroplasty.PVP) and percutaneous vertebral body
Plasty (percutaneouskyphoplasty, PKP) is widely used in treating Treatment of osteoporotic vertebral compression fractures, minimally invasive, town
Pain definite effect, but fracture loses healing chance, is suitable for elderly patient；3. bone cement pedicle screw can obtain at once
Stabilization, is still influence union chance and operating time is obviously prolonged；4. expanding pedicle screw, cannot obtain at once steady
It is fixed, and anti-soon resistance to plucking output capacity is low.Design a kind of pedicle screw of the centrum of novel fixed osteoporosis or bone amount reduction
It is imperative.
Invention content
The purpose of the present invention is：It is intended to provide a kind of anti-rotation pedicle screw of self-locking and its application method, it has notable
Increase the fixed stability of pedicle screw, improves pedicle screw axial direction resisting pull out forces.Screw is not easy to loosen and exit, broken nail hair
The low advantage of raw rate.
To realize the above-mentioned technical purpose, the technical solution adopted by the present invention is as follows：
A kind of anti-rotation pedicle screw of self-locking, including integrally formed screw tail portion and screw body, the screw tail portion
Top offers U-lag, and screw tail portion upper surface offers the first blind hole, and the first blind hole inner wall is equipped with spiral shell in first
Line, the screw body outer wall are equipped with the first external screw thread, and the screw body is equipped with the second blind hole in the first blind via bottom, described
Middle bar is equipped in second blind hole, the middle bar is threadedly coupled with screw body, and the middle bar lower end is in up big and down small taper knot
Structure, screw body lower part radial symmetric are set there are two notch, and the height dimension of the inner side is more than on the outside of notch
Height dimension, is equipped with bail in the notch, and screw body outer wall is exposed in the bail outer end, on the inside of the bail upper surface
Equipped with second boss.
It further limits, the screw body is equipped with annular groove in the second blind hole top edge, in the annular groove
Wall is equipped with the second internal thread, and the middle bar upper surface is equipped with the first boss that matches with annular groove, outside the first boss
Wall is equipped with the second external screw thread to match with the second internal thread, and the first boss upper surface is equipped with hexagonal blind hole in first.This
The structure design of sample, first boss are mounted in annular groove, and bar is threadedly coupled with screw body in completion, is fixed to each other
On the basis of, first boss is sunk in annular groove, the use for influencing the first internal thread of the first blind hole inner wall is avoided.
It further limits, the second boss upper surface by tilting gradually downward inwardly outside.Such structure design makes
Two boss and the pyramidal structure of middle bar lower end match so that and middle bar end can be caught in more easily between two bails,
It is more convenient to use.
It further limits, the bail inner face is arc-shaped.Such structure design so that form one between two bails
A gap, middle bar end can be more easily inserted between two bails.
It further limits, the pedicle screw further includes putting rod, and the putting rod upper end is equipped with handle, the storing
Bar lower end is equipped with threaded post, and the second boss upper surface is equipped with the threaded hole to match with threaded post vertically.Such structure
Design closes connection bail, then bail is put by putting rod by threaded post and the corresponding threaded holes of putting rod when in use
In notch, putting rod is then reversely rotated, takes out putting rod, then place another bail, it is more convenient to use.
It further limits, the pedicle screw further includes that card sets bar, and the card sets bar upper surface and is equipped with and annular groove
The third boss to match, the third outer wall of boss are equipped with the third external screw thread to match with the second internal thread, the third
Boss upper surface is equipped with hexagonal blind hole in third, and the card sets bar lower face equipped with longitudinal section in up-narrow and down-wide trapezium structure
Circular groove.It after bail is put into notch by putting rod, then places card in screw body and sets bar, bar is set by card
Circular groove blocks the second boss of bail, and screw body is then implanted into bone, and after the completion of implantation, card of dismantling sets bar, installation
Middle bar；Such structure design can avoid screw body in implantation process, and screw body is protruded in bail outer end, is made to bone
At injury.
It further limits, the second boss lateral surface is to match arc with circular groove.Such structure design, the
The lateral surface of two boss and the inner wall of circular groove match, and in card sets bar rotation process, second boss and card are set between bar
Contact be face contact, the water chestnut that can avoid second boss sets bar to card and causes to damage, and practicability is stronger.
It further limits, first external screw thread is double thread.Such structure design, can not only obtain faster into
Speed is followed closely, and relative to single thread, there are better resisting pull out forces, can be avoided screw loosening to a certain extent and pull out
The complication such as go out.
The invention also discloses the application methods of the anti-rotation pedicle screw of above-mentioned self-locking, include the following steps：
S1. bail is assembled：Bail is installed on putting rod, then the putting rod for installing bail is put into screw body,
Operation putting rod makes bail pass through notch, and bail end is located on the outside of screw body, then takes out putting rod, repeats above-mentioned step
Suddenly, another bail is installed on to the gap position of screw body；At this point, bail outer end is stopped by notch, reversely rotates and put
Bar, you can so that threaded post is detached from threaded hole, it is easy to use；
S2. installation card sets bar：It is hidden in screw body to bail end to press two bails, then in screw master
Internal installation card sets bar；The sum of the length dimension of two bails is slightly less than the outer diameter of screw body, is installed when card sets bar
Cheng Hou, bail outer end are unlikely to protrude outside screw body, bail are can avoid in screw body implantation process, to skeleton
It causes to scratch；
S3. it is implanted into bone：Bail is mounted with skeleton is implanted into the screw body for setting bar is blocked；At this time outside two bails
End is kept off by bone so that bail is unlikely to fall；
S4. reinforce fixing：It using tool clamp screws tail portion, then reversely rotates card and sets bar, so that card is set bar and be detached from screw
Main body, is continuing with tool clamp screws tail portion, then bar in being installed in screw body, middle bar during moving down,
Bail is pushed to be moved horizontally to both sides, to make bail be caught in skeleton so that screw body is not easy to loosen and exit.
Using the invention of above-mentioned technical proposal, screw body is hollow structure, and bar in being installed in screw body makes middle bar
It bears radial shear power together with screw body, the structural strength of screw body can be improved, prevent broken nail, stick situation of breaking
Occur；The bail extended to both sides is set in screw body lower end, and with the movement of middle bar, bail is moved horizontally to both sides, card
Enter skeleton, increase the fixed stability of pedicle screw, improve pedicle screw axial direction resisting pull out forces, screw is not easy to loosen
It exits, and bone will not be damaged elsewhere.
Description of the drawings
The present invention can be further illustrated by the nonlimiting examples that attached drawing provides；
Fig. 1 is a kind of anti-rotation pedicle screw of self-locking of the present invention and its structural schematic diagram of application method embodiment；
Fig. 2 is the schematic cross-sectional view of a kind of anti-rotation pedicle screw of self-locking of the present invention and its application method embodiment；
Fig. 3 is the enlarged structure schematic diagram at A in Fig. 2；
Fig. 4 is the section view knot of screw body in a kind of anti-rotation pedicle screw of self-locking of the present invention and its application method embodiment
Structure schematic diagram；
Fig. 5 is the enlarged structure schematic diagram at B in Fig. 4；
Fig. 6 is the structural representation of bail in a kind of anti-rotation pedicle screw of self-locking of the present invention and its application method embodiment
Figure；
Fig. 7 is the knot of putting rod and bail in a kind of anti-rotation pedicle screw of self-locking of the present invention and its application method embodiment
Structure schematic diagram；
Fig. 8 is the structural representation that card sets bar in a kind of anti-rotation pedicle screw of self-locking of the present invention and its application method embodiment
Figure；
Fig. 9 is the knot that card sets when bar uses in a kind of anti-rotation pedicle screw of self-locking of the present invention and its application method embodiment
Structure schematic diagram；
Figure 10 is the enlarged structure schematic diagram at C in Fig. 9；
Main element symbol description is as follows：
Screw tail portion 1, the first blind hole 11, screw body 2, annular groove 21, the second blind hole 22, middle bar 3, first boss
31, hexagonal blind hole 32 in first, notch 4, bail 5, second boss 51, putting rod 6, handle 61, threaded post 62, threaded hole 620,
Card sets bar 7, third boss 71, hexagonal blind hole 72, circular groove 73 in third.
Specific implementation mode
In order to make those skilled in the art that the present invention may be better understood, with reference to the accompanying drawings and examples to this hair
Bright technical solution further illustrates.
As shown in Fig. 1~Figure 10, a kind of anti-rotation pedicle screw of self-locking of the invention, including integrally formed screw tail portion
1 and screw body 2,1 top of screw tail portion offer U-lag, 1 upper surface of screw tail portion offers the first blind hole 11, and first is blind
11 inner wall of hole is equipped with the first internal thread, and 2 outer wall of screw body is equipped with the first external screw thread, and screw body 2 is in 11 bottom of the first blind hole
Equipped with the second blind hole 22, it is equipped with middle bar 3 in the second blind hole 22, middle bar 3 is threadedly coupled with screw body 2, and 3 lower end of middle bar is presented greatly
Under small pyramidal structure, 2 lower part radial symmetric of screw body sets there are two notch 4, and the height dimension of 4 inside of notch is more than notch
The height dimension in 4 outsides, is equipped with bail 5 in notch 4, and 1 outer wall of screw body is exposed in 5 outer end of bail, on the inside of 5 upper surface of bail
Equipped with second boss 51.
Wherein, screw body 2 is equipped with annular groove 21 in 22 top edge of the second blind hole, and 21 inner wall of annular groove is equipped with the
Two internal threads, 3 upper surface of middle bar are equipped with the first boss 31 that matches with annular groove 21, and 31 outer wall of first boss is equipped with and the
The second external screw thread that two internal threads match, 31 upper surface of first boss are equipped with hexagonal blind hole 32 in first.Such structure is set
Meter, first boss 31 are mounted in annular groove 21, and bar 3 is threadedly coupled with screw body 2 in completion, the basis being fixed to each other
On, first boss 31 is sunk in annular groove 21, the use for influencing the first internal thread of 11 inner wall of the first blind hole is avoided.
51 upper surface of second boss by tilting gradually downward inwardly outside.Such structure design makes second boss 51 in
The pyramidal structure of 3 lower end of bar matches so that 3 end of middle bar can be caught in more easily between two bails 5, using more
It is convenient.
5 inner face of bail is arc-shaped.Such structure design a so that gap, middle bar 3 are formed between two bails 5
End can be more easily inserted between two bails 5.
Pedicle screw further includes putting rod 6, and 6 upper end of putting rod is equipped with handle 61, and 6 lower end of putting rod is equipped with threaded post
62,51 upper surface of second boss is equipped with the threaded hole 620 to match with threaded post 62 vertically.Such structure design is using
When, by the threaded post 62 of putting rod 6 and 620 bail 5 in mating connection of threaded hole, then by putting rod 6 bail 5 is put into scarce
In mouth 4, putting rod 6 is then reversely rotated, takes out putting rod 6, then place another bail, it is more convenient to use.
Pedicle screw further includes that card sets bar 7, and card sets 7 upper surface of bar and is equipped with the third boss to match with annular groove 21
71,71 outer wall of third boss is equipped with the third external screw thread to match with the second internal thread, and 71 upper surface of third boss is equipped with third
Interior hexagonal blind hole 72, card set circular groove 73 of 7 lower face of bar equipped with longitudinal section in up-narrow and down-wide trapezium structure.By setting
It puts after bar 6 is put into bail 5 in notch 4, then places card in screw body 2 and set bar 7, the circular groove 73 of bar 7 is set by card
The second boss 51 of bail 5 is blocked, screw body 2 is then implanted into bone, after the completion of implantation, card of dismantling sets bar 7, bar in installation
3；Such structure design can avoid screw body 2 in implantation process, and screw body 2 is protruded in 5 outer end of bail, is made to bone
At injury.
51 lateral surface of second boss is to match arc with circular groove 73.Such structure design, second boss 51
The inner wall of lateral surface and circular groove 73 matches, and in card sets 7 rotation process of bar, second boss 51 and card are set between bar 7
Contact is that face contacts, and the water chestnut of avoidable second boss 51 sets bar 7 to card and causes to damage, and practicability is stronger.
First external screw thread is double thread.Such structure design can not only obtain faster into nail speed, and relatively
In single thread, there are better resisting pull out forces, the complication such as screw loosening and extraction can be avoided to a certain extent.
The invention also discloses the application methods of the anti-rotation pedicle screw of above-mentioned self-locking, include the following steps：
S1. bail is assembled：Bail 5 is installed on putting rod 6, the putting rod 6 for installing bail 5 is then put into screw body
In 2, operation putting rod 6 makes bail 5 pass through notch 4, and 5 end of bail is located at 2 outside of screw body, then takes out putting rod 6,
It repeats the above steps, another bail 6 is installed on to 4 position of notch of screw body 2；At this point, 5 outer end of bail is hindered by notch 4
Gear reversely rotates putting rod 6, you can and so that threaded post 62 is detached from threaded hole 620, it is easy to use；
S2. installation card sets bar：It is hidden in screw body 2 to 5 end of bail to press two bails 5, then in spiral shell
Installation card sets bar 7 in nail main body 2；The sum of the length dimension of two bails 5 is slightly less than the outer diameter of screw body 2, when card is set
After installation is complete, 5 outer end of bail is unlikely to protrude outside screw body 2 bar 7, can avoid bail 5 in 2 implantation process of screw body
In, skeleton is caused to scratch；
S3. it is implanted into bone：Bail 5 is mounted with skeleton is implanted into the screw body 2 for setting bar 7 is blocked；Two cards at this time
Nail outer end is kept off by bone so that bail 5 is unlikely to fall；
S4. reinforce fixing：It using tool clamp screws tail portion 1, then reversely rotates card and sets bar 7, so that card is set bar 7 and be detached from spiral shell
Main body 2 is followed closely, tool clamp screws tail portion 1, then the bar 3 in the interior installation of screw body 2 are continuing with；Middle bar 3 is moving down
In the process, bail 5 is pushed to be moved horizontally to both sides, to make bail 5 be caught in skeleton so that screw body 2 is not easy to loosen
It exits.
In the present embodiment, screw body 2 is hollow structure, and bar 3 in installation, makes middle bar 3 and screw master in screw body 2
Body 2 bears radial shear power together, and the structural strength of screw body 2 can be improved, the occurrence of preventing broken nail, disconnected stick；
The bail 5 extended to both sides is set in 2 lower end of screw body, and with the movement of middle bar 3, bail 5 is moved horizontally to both sides, is caught in
Skeleton increases the fixed stability of pedicle screw, improves pedicle screw axial direction resisting pull out forces, and screw is not easy to loosen and move back
Go out, and bone will not be damaged elsewhere.
A kind of anti-rotation pedicle screw of self-locking provided by the invention and its application method are described in detail above.Tool
The explanation of body embodiment is merely used to help understand the method and its core concept of the present invention.It should be pointed out that being led for this technology
For the those of ordinary skill in domain, without departing from the principle of the present invention, can also to the present invention carry out it is several improvement and
Modification, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (9)
1. a kind of anti-rotation pedicle screw of self-locking, including integrally formed screw tail portion (1) and screw body (2), the screw
Tail portion (1) top offers U-lag, and screw tail portion (1) upper surface offers the first blind hole (11), first blind hole
(11) inner wall is equipped with the first internal thread, and screw body (2) outer wall is equipped with the first external screw thread, and the screw body (2) is in the
One blind hole (11) bottom is equipped with the second blind hole (22), it is characterised in that：Middle bar (3) is equipped in second blind hole (22), it is described
Middle bar (3) is threadedly coupled with screw body (2), and middle bar (3) lower end is in up big and down small pyramidal structure, the screw body
(2) lower part radial symmetric is set there are two notch (4), and the height dimension on the inside of the notch (4) is more than the height on the outside of notch (4)
Size, the notch (4) is interior to be equipped with bail (5), and screw body (1) outer wall, the bail are exposed in bail (5) outer end
(5) second boss (51) is equipped on the inside of upper surface.
2. a kind of anti-rotation pedicle screw of self-locking according to claim 1 and its application method, it is characterised in that：The spiral shell
It follows closely main body (2) and is equipped with annular groove (21) in the second blind hole (22) top edge, annular groove (21) inner wall is equipped with second
Internal thread, middle bar (3) upper surface are equipped with the first boss (31) to match with annular groove (21), the first boss
(31) outer wall is equipped with the second external screw thread to match with the second internal thread, and first boss (31) upper surface is equipped with six in first
Angle blind hole (32).
3. a kind of anti-rotation pedicle screw of self-locking according to claim 2 and its application method, it is characterised in that：Described
Two boss (51) upper surface by tilting gradually downward inwardly outside.
4. a kind of anti-rotation pedicle screw of self-locking according to claim 3 and its application method, it is characterised in that：The card
It is arc-shaped to follow closely (5) inner face.
5. a kind of anti-rotation pedicle screw of self-locking according to claim 4 and its application method, it is characterised in that：The vertebra
Pedicle screw further includes putting rod (6), and putting rod (6) upper end is equipped with handle (61), and putting rod (6) lower end is equipped with spiral shell
Line column (62), second boss (51) upper surface are equipped with the threaded hole (620) to match with threaded post (62) vertically.
6. a kind of anti-rotation pedicle screw of self-locking according to claim 5 and its application method, it is characterised in that：The vertebra
Pedicle screw further includes that card sets bar (7), and the card sets bar (7) upper surface and is equipped with the third boss to match with annular groove (21)
(71), third boss (71) outer wall is equipped with the third external screw thread to match with the second internal thread, the third boss (71)
Upper surface is equipped with hexagonal blind hole (72) in third, and it is in up-narrow and down-wide trapezoidal knot that the card, which sets bar (7) lower face equipped with longitudinal section,
The circular groove (73) of structure.
7. a kind of anti-rotation pedicle screw of self-locking according to claim 6 and its application method, it is characterised in that：Described
Two boss (51) lateral surface is to match arc with circular groove (73).
8. a kind of anti-rotation pedicle screw of self-locking according to claim 7 and its application method, it is characterised in that：Described
One external screw thread is double thread.
9. a kind of application method of the anti-rotation pedicle screw of self-locking as claimed in claim 8, which is characterized in that including following step
Suddenly：
S1. bail is assembled：Bail (5) is installed on putting rod (6), the putting rod (6) for installing bail (5) is then put into screw
In main body (2), operation putting rod (6) makes bail (5) pass through notch (4), and bail (5) end is located on the outside of screw body (2),
Putting rod (6) is then taken out, repeats the above steps, another bail (6) is installed on to notch (4) position of screw body (2)；
S2. installation card sets bar：It is hidden in the screw body (2) to bail (5) end to press two bails (5), then in
Screw body (2) interior installation card sets bar (7)；
S3. it is implanted into bone：Be mounted with bail (5) and card set bar (7) screw body (2) be implanted into skeleton；
S4. reinforce fixing：Using tool clamp screws tail portion (1), then reversely rotates card and set bar (7), card is made to set bar (7) disengaging
Screw body (2) is continuing with tool clamp screws tail portion (1), then the bar (3) in the interior installation of screw body (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385391.1A CN108498155B (en) | 2018-04-26 | 2018-04-26 | Self-locking anti-rotation pedicle screw and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385391.1A CN108498155B (en) | 2018-04-26 | 2018-04-26 | Self-locking anti-rotation pedicle screw and use method thereof |
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| CN108498155B CN108498155B (en) | 2023-06-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109276305A (en) * | 2018-09-19 | 2019-01-29 | 丁敬瑄 | A kind of orthopaedics lock screw |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109276305A (en) * | 2018-09-19 | 2019-01-29 | 丁敬瑄 | A kind of orthopaedics lock screw |
| CN109276305B (en) * | 2018-09-19 | 2021-11-30 | 陆焕彪 | Orthopedic locking screw |
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