CN108013923A - A kind of anchors strengthens bone screws - Google Patents
A kind of anchors strengthens bone screws Download PDFInfo
- Publication number
- CN108013923A CN108013923A CN201711247651.0A CN201711247651A CN108013923A CN 108013923 A CN108013923 A CN 108013923A CN 201711247651 A CN201711247651 A CN 201711247651A CN 108013923 A CN108013923 A CN 108013923A
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- China
- Prior art keywords
- anchors
- cavity volume
- core bar
- actuator
- slot
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Classifications
-
- 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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- 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
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
-
- 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
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
-
- 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
Abstract
The present invention relates to bone surgery set field, particularly a kind of anchors strengthens bone screws, including screw body and anchors component, the anchors component includes core bar and the actuator for driving core bar to be axially moveable in component cavity volume, the core bar is integrally in the form of a column, and two laterally outsides obliquely extend from a pair of bar shaped flat member composition anchors for having one fixed width, front end hanging on the core bar；A pair of anchors slot for running through side wall is provided tiltedly with the component cavity volume inner wall.By driving the actuator, such as utilize the thread fitting between actuator and component cavity volume inner wall, core bar is headed into forward component cavity volume by rotary drive, anchors is promoted to move forward, when anchors reaches appropriate location, anchors so as to have the function that grappling, can increase the effect of the biomechanical stability of screw fixation along being obliquely installed, being stretched out through the anchors slot of side wall outside screw body.
Description
Technical field
The invention belongs to bone surgery set field, specifically, is related to a kind of new bone screws --- and anchors strengthens murices
Nail.
Background technology
In orthopaedics, it need to often apply and be fixed in screw progress, for patient when carrying out bone surgery, it is one wide that screw, which is fixed,
The technology of general application.There are some defects when being fixed using existing bone screws：1）If the sclerotin fixed is cancellous bone or bone
Matter is abnormal, such as suffers from osteoporosis, can make it that the anti-dial-out of screw and anti-cut ability are weaker, and the biomethanics that screw is fixed is steady
It is qualitative poor；2）As wished on the basis of original screw, increase the biomechanical stability of its fixation, it is general to be consolidated using double cortex
It is fixed, increase screw diameter, or bone cement is injected to increase the biomechanical strength of screw fixation in sclerotin；But these methods are deposited
Similar the shortcomings that, such as in sclerotin injecting bone cement can cause bone cement to leak, so as to damage surrounding vital tissue such as spinal cord
Possibility；Increase screw diameter while the mechanical stability that screw is fixed is strengthened, can accordingly increase the damage of sclerotin, and
Some positions can not be solved by increasing screw diameter, such as increased the diameter of pedicle screw or caused pedicle of vertebral arch to rupture, instead
And reduce the biomechanical stability of screw fixation；At some positions, double cortex, which are fixed, can damage neighbouring important feature, such as spiral shell
Nail penetrates risk of the anterior margin of vertebral body cortex there are important blood vessels in front of injected vertebral body, when hip screw is fixed, penetrates anterior cortex
In the presence of important blood vessels in damage pelvic cavity, or even threat to life may.Therefore it is good there is an urgent need for a kind of not only biomechanical stability but also at the same time
It can avoid damage to the new bone screws of adjacent tissue.
The content of the invention
It is good it is an object of the invention to provide a kind of biomechanical stability for overcome the deficiencies in the prior art
The new bone screws of adjacent tissue can be avoided damage at the same time.
To achieve these goals, the invention discloses a kind of anchors to strengthen bone screws, including screw body, screw sheet
Body includes the head of a nail, rivet nut and nail tip, and rivet nut and nail tip are equipped with screw thread, and the head of a nail is equipped with the structure for facilitating instrument to screw screw, its
It is characterized in that：Anchors component is additionally provided with, the screw body is equipped with axial pass-through holes and forms component cavity volume, the anchors component bag
Core bar and the actuator for driving core bar to be axially moveable in component cavity volume are included, the core bar is integrally in the form of a column, the core
Two laterally outsides obliquely extend from a pair of bar shaped flat member that there is one fixed width, front end vacantly to dissociate and form anchors on bar；
The component cavity volume inner wall is equipped with the same outward-dipping anchors slot through side wall more than a pair of or a pair of, per a pair of anchors
Slot is on axially distinct position, is equipped with the guide groove being connected with anchors slot on component cavity volume inner wall vertically, described
Core bar and the axially slidable cooperation of component cavity volume, the actuator and component cavity volume are axially slidable, and with the component cavity volume
Inner wall forms Detachable connection structure in thread fitting.
This anchors strengthens bone screws when in use, and selection needs anchors to strengthen the suitable position of screw body fixation, root
According to the anchors component of the position selection appropriate length of anchors, first screw body is screwed into the sclerotin that need to be fixed, by the anchors
Core bar and actuator in component are inserted in the component cavity volume of screw body successively, and the anchors alignment guiding on core bar is recessed
Groove, by driving the actuator, such as using thread fitting between actuator and component cavity volume inner wall, rotary drive is by core
Bar heads into forward component cavity volume, promotes anchors to be moved along guide groove to guide groove, when anchors reaches appropriate location, anchors
, so as to have the function that grappling, spiral shell can be increased outside anchors slot stretching screw body being obliquely installed, through side wall
Follow closely the effect of fixed biomechanical stability.
Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described.
Brief description of the drawings
Attached drawing 1 is 1 stereoscopic structure diagram of the specific embodiment of the invention；
Attached drawing 2 is 1 front view of the specific embodiment of the invention；
Attached drawing 3 is Fig. 2 A-A structure sectional views；
Attached drawing 4 is 1 left view of the specific embodiment of the invention；
Attached drawing 5 is Fig. 4 B-B structure sectional views；
Attached drawing 6 is 1 stereoscopic structure diagram of anchors component specific embodiment of the present invention；
Attached drawing 7 is 1 left view of anchors component specific embodiment of the present invention；
Attached drawing 8 is Fig. 7 C-C structure sectional views；
Attached drawing 9 is 1 structural decomposition diagram of anchors component specific embodiment of the present invention；
Attached drawing 10 is 2 structure sectional view of the specific embodiment of the invention；
Attached drawing 11 is one of 2 stereoscopic structure diagram of core bar specific embodiment of the present invention；
Attached drawing 12 is 2 stereoscopic second structural representation of core bar specific embodiment of the present invention；
Attached drawing 13 is 1 actuator front view of the specific embodiment of the invention；
Attached drawing 14 is Figure 13 D-D structure sectional views.
Embodiment
As shown in Figs. 1-3, anchors, which strengthens bone screws, includes screw body 1 and anchors component 2, and screw body 1 includes the head of a nail
101st, rivet nut 102 and nail tip 103, rivet nut 102 and nail tip 103 are equipped with screw thread, and the head of a nail 101, which is equipped with, facilitates instrument to screw screw
Structure, such as flat recess, cross recess or interior hexagonal, screw body 1 can be the bone screws of any type, as os integumentale screw,
Cancellous bone screw and composite screws etc., the screw body 1 is equipped with axial pass-through holes and is used to connect guide pin, preferably adjacent to rear end
（101 one end of the head of a nail）The perforation bore dia of a part is slightly larger to form component cavity volume 104.The anchors component 2 include core bar 201 with
And the actuator 202 for driving core bar 201 to be axially moveable in component cavity volume 104, the screw body 1 and anchors component 2
Using the alloy material of composite sanitary standard.The core bar 201 is overall to be in the form of a column, and two laterally outsides tilt on the core bar 201
Extend a pair of bar shaped flat member composition anchors 2011 for having one fixed width, front end hanging；104 inner wall of component cavity volume
On be provided tiltedly with a pair or more of anchors slot 105 through side wall, be equipped with vertically on 104 inner wall of component cavity volume with
The connected guide groove 106 of anchors slot 105, the core bar 201 and the 104 axially slidable cooperation of component cavity volume, the driving
Part 202 and component cavity volume 104 are axially slidable, and form and be detachably connected in thread fitting with 104 inner wall of component cavity volume
Structure, the core bar 201 and actuator 202.Wherein anchors 2011 and anchors slot 105 can be symmetrical arranged with right and wrong, but preferably
To be symmetrical arranged.
The core bar 201 can be overall rod-shaped in cylinder, or including the less body of rod 2012 of diameter and the body of rod
The head 2013 that 2012 rear ends are relatively large in diameter, the pair of anchors 2011 are symmetricly set on the body of rod 2012, the anchors 2011
Can be from it is rear it is interior tiltedly move towards to set to outward lean, or by preceding interior outer incline backward move towards set, according to the anchors 2011
Incline direction, correspondingly the anchors slot 105 can be from it is rear it is interior to outward lean tiltedly move towards set or by preceding interior
Outer incline moves towards to set backward, as shown in Figure 10,12.Core bar 201 includes the head 2013 of 2012 rear end of the body of rod 2012 and the body of rod,
The pair of anchors 2011 can be symmetrically set directly on the body of rod 2012, or is symmetrically axially extended forward from head 2013
Go out.Actuator 202 can be separately set with the core bar 201, and the actuator 202 can be and 104 inner wall structure of component cavity volume
Into the screw plug for being threadedly coupled cooperation, i.e. the inner wall of component cavity volume 104 is equipped with one section of internal thread, 202 outside diameter of actuator and component
The internal orifice dimension of cavity volume 104 matches, and 202 surface of actuator is equipped with the external screw thread to match with internal thread, on the rear end face of actuator 202
Equipped with the structure for facilitating instrument to screw, such as flat recess, cross recess or interior hexagonal, the tail end of the core bar 201, which is equipped with, to be used to hook
The hanging hole of drawing, in this way, when needing to take out core bar 201, can be hooked by raker and hold the core bar 201 from component on hanging hole
Pulled out in chamber 104.
This anchors strengthens bone screws when in use, is first screwed into screw body 1 in the sclerotin that need to be fixed, then by the anchors
Core bar 201 and actuator 202 in component 2 are inserted in the component cavity volume 104 of screw body 1 successively, allow actuator 202 to be against core
On 201 rear end of bar, the anchors 2011 on core bar 201 is directed at the guide groove 106, by rotating clockwise the driving driving
Part 202, heads into forward 104 depths of component cavity volume by core bar 201, drives anchors 2011 to move forward, and is fitted when anchors 2011 reaches
When position, using 2011 termination of natural resiliency anchors can along be obliquely installed, through side wall anchors slot 105 stretch out spiral shell
Follow closely and be inserted into outside body 1 in the bone tissue outside screw body 1, so that have the function that grappling, the biology that increase screw is fixed
The effect of mechanical stability, is further elaborated on the present invention with specific embodiment below.
Specific embodiment 1
In this specific embodiment, screw body 1 includes the head of a nail 101, rivet nut 102 and nail tip 103, is set in rivet nut 102 and nail tip 103
There is screw thread, the head of a nail 101 is equipped with the structure for facilitating instrument to screw screw, and the screw body 1 is equipped with axial pass-through holes and is used to connect
Guide pin, close to rear end（101 one end of the head of a nail）The perforation bore dia of a part is slightly larger to form component cavity volume 104, in component cavity volume 104
Wall is equipped with internal thread, and a pair of anchors slot 105 for running through side wall is provided tiltedly with 104 inner wall of component cavity volume, and component holds
On 104 inner wall of chamber axially guiding groove 106 is equipped with along anchors slot 105 to 104 opening of component cavity volume.
The anchors component 2 includes core bar 201 and actuator 202, and the actuator 202 is a bit of cylinder, diameter
Match with 104 endoporus of component cavity volume, the surface of the actuator 202 be equipped with the matched external screw thread of the internal thread, with group
104 inner wall of part cavity volume, which forms to be threadedly coupled, to be coordinated, and the rear end face of actuator 202 is equipped with flat recess, facilitates instrument to screw, make institute
State actuator 202 and component cavity volume 104 is axially slidable, and it is removable in thread fitting composition with 104 inner wall of component cavity volume
Unload connection structure.
In this specific embodiment, as illustrated in figs. 13-14, the front end specifically in the actuator 202（Towards core bar 201
One end）Caulking groove or cavity 2021 equipped with section in convex, the rear end shape of the core bar 201 and the caulking groove of the convex
Or cavity 2021 is adapted, and clearance fit forms the axial linkage circumferentially in the caulking groove or cavity 2021 of the convex
Connection is relatively rotated, as Figure 6-9.
The core bar 201 and the 104 axially slidable cooperation of component cavity volume, on the core bar 201, extend outward a pair of of tool
The bar shaped flat member for having one fixed width forms anchors 2011, and 2011 head end of anchor vacantly dissociates, and tail end is fixed on head
2013 or the body of rod 2012, the width of anchors 2011 and section and 105 clearance fit of guide groove 106 and anchors slot.
Furthermore it is also possible to the more than one pair of anchors slot through side wall is equipped with 104 inner wall of component cavity volume
105, per a pair of anchors slot 105 on axially distinct position, and connected axially guiding groove 106 is equipped with,
And it is equipped with connected axially guiding groove.So can be as needed, select to carry out grappling in different positions.
This anchors strengthens bone screws when in use：
1. when anchors 2011 from after it is interior tiltedly move towards to set to outward lean, after respective anchors piece slot 105 is same in is tiltedly walked to outward lean
To when setting（During in positive "eight" shape）.First screw body 1 is screwed into the sclerotin that need to be fixed, then the anchors component 2 is put
In the component cavity volume 104 for entering screw body 1, by rotating clockwise the driving actuator 202, by linking circumferentially opposed turn
Action is used, and core bar 201 is headed into forward 104 depths of component cavity volume, driving anchors 2011 moves forward, and is fitted when anchors 2011 reaches
When position, using 2011 termination of natural resiliency anchors can after same in tiltedly move towards to outward lean to set, through side wall
Anchors slot 105, and stretch out outside screw body 1 and be inserted into bone tissue, so as to have the function that grappling, increase screw is fixed
Biomechanical stability effect.During as that need to back-out bone screws body 1, first rotary drive 202 counterclockwise, passes through week of linking
To relative rotation, you can related anchors 2011 takes out core bar 201 together with actuator 202, finally passes through the head of a nail with screwdriver
101 back-out 1 body of screw sheet.
2. when anchors 2011 is moved towards to set by preceding interior outer incline backward, respective anchors piece slot 105 is equally by preceding interior outer backward
When inclination is moved towards to set（During in inverted "eight" shape）.First screw body 1 is screwed into the sclerotin that need to be fixed, then by the anchors group
Part 2 is inserted in the component cavity volume 104 of screw body 1, circumferential by linking by rotating clockwise the driving actuator 202
Relative rotation acts on, and core bar 201 is headed into forward 104 deeper inside of component cavity volume, the free end of anchors 2011 exceedes anchors slot
After 105 internal orifices, another mistake hour hands rotary drive 202, by the circumferentially opposed rotary action that links, by core bar 201 together with anchors
2011 pull back, can be along same using 2011 termination of natural resiliency anchors when anchors 2011 reaches anchors 105 internal orifice of slot
Sample is moved towards to set and through the anchors slot 105 of side wall by preceding interior outer incline backward, and stretches out and surrounding is inserted into outside screw body 1
Sclerotin.During as bone screws body 1 need to be back-outed, first pass through and rotate clockwise actuator 202, circumferentially opposed rotate is made by linking
With core bar 201 headed into forward 104 deeper inside of component cavity volume, drives anchors 2011 to move forward, anchors 2011 is stretched out outside screw
Part can be receded into screw assembly cavity volume 104, finally back-outed 1 body of screw sheet by the head of a nail 101 with screwdriver.
Specific embodiment 2
In this specific embodiment, anchors, which strengthens bone screws, includes screw body 1 and anchors component 2, and the screw body 1 is equipped with axis
It is used to connect guide pin to through hole, preferably adjacent to rear end（101 one end of the head of a nail）The slightly larger composition component of perforation bore dia of a part
Cavity volume 104.The anchors component 2 includes core bar 201 and actuator 202, and actuator 202 is separately set with the core bar 201, drives
Moving part 202 is to form the screw plug for being threadedly coupled and coordinating with component cavity volume inner wall, and the actuator 202 is a bit of cylinder, directly
Footpath matches with 104 endoporus of component cavity volume, and the surface of the actuator 202 is equipped with and the matched external screw thread of the internal thread, drive
The rear end face of moving part 202 is equipped with flat recess, facilitates instrument to screw, and the actuator 202 is axially slided with component cavity volume 104
It is dynamic, and with 104 inner wall of component cavity volume Detachable connection structure is formed in thread fitting.
The core bar 201 is overall rod-shaped in cylinder, and diameter and 104 endoporus clearance fit of component cavity volume, make the core bar
201 are equipped with the hanging hole for being used for hooking drawing with the 104 axially slidable cooperation of component cavity volume, the tail end of the core bar 201.The core bar
On 201, extend outward a pair of bar shaped flat member with one fixed width and form anchors 2011,2011 head end of anchor is vacantly swum
From into free end, and tail end is fixed on head 2013 or the body of rod 2012, and the anchors 2011 can be from rear interior oblique to outward lean
Move towards to set, as shown in figure 11, alternatively, the anchors 2011 is moved towards to set by preceding interior outer incline backward, and the anchors 2011
Free end tilts laterally, as shown in figure 12, between the width of anchors 2011 and section and guide groove 106 and anchors slot 105
Gap coordinates.
Screw body 1 includes the head of a nail 101, rivet nut 102 and nail tip 103, and rivet nut 102 and nail tip 103 are equipped with screw thread, the head of a nail
101 are equipped with the structure for facilitating instrument to screw screw, and the screw body 1 is equipped with axial pass-through holes and is used to connect guide pin, after
End（101 one end of the head of a nail）The perforation bore dia of a part is slightly larger to form component cavity volume 104, and 104 inner wall of component cavity volume is equipped with interior
Screw thread, is provided tiltedly with a pair of anchors slot 105 for running through side wall on 104 inner wall of component cavity volume, on 104 inner wall of component cavity volume
Axially guiding groove 106 is equipped with along 105 distal end of anchors slot to 104 opening of component cavity volume.According to inclining for the anchors 2011
Tilted direction, correspondingly the anchors slot 105 can be from it is rear it is interior to outward lean tiltedly move towards set or by it is preceding it is interior backward
Outer incline moves towards to set.
Furthermore it is also possible to the more than one pair of anchors slot through side wall is equipped with 104 inner wall of component cavity volume
105, per a pair of anchors slot 105 on axially distinct position, and it is equipped with connected axially guiding groove 106.
So can be as needed, select to carry out grappling in different positions.
This anchors strengthens bone screws when in use：
1. when anchors 2011 from after it is interior tiltedly move towards to set to outward lean, after respective anchors piece slot 105 is same in is tiltedly walked to outward lean
To when setting（When being in positive "eight" shape）.First screw body 1 is screwed into the sclerotin that need to be fixed, then by the anchors component 2
Insert in the component cavity volume 104 of screw body 1, by rotating clockwise the driving actuator 202, by core bar 201 to sinciput
Enter 104 depths of component cavity volume, drive anchors 2011 to move forward, when anchors 2011 reaches appropriate location, utilize natural resiliency
2011 termination of anchors can after same in tiltedly move towards to set to outward lean, the anchors slot 105 through side wall, and stretch out screw
Sclerotin around bone screws is inserted into outside body 1, so that have the function that grappling, the biomechanical stability that increase screw is fixed
Effect, as shown in Figure 10.When strengthening bone screws as anchors need to be back-outed, first rotary drive 202 counterclockwise, first by actuator
202 take out, and the hanging hole of exposure 201 tail end of core bar, is held core bar 201 by the hanging hole for catching on 201 tail end of core bar backward, you can
Related anchors 2011 exits together, is finally back-outed 1 body of screw sheet by the head of a nail 101 with screwdriver.
2. when anchors 2011 is moved towards to set by preceding interior outer incline backward, respective anchors piece slot 105 is equally by preceding interior outer backward
When inclination is moved towards to set（During in inverted "eight" shape）.First screw body 1 is screwed into the sclerotin that need to be fixed, then by the anchors group
Part 2 is inserted in the component cavity volume 104 of screw body 1, by rotating clockwise the driving actuator 202, by core bar 201 forward
104 deeper inside of component cavity volume is headed into, after the head end that anchors 2011 is vacantly dissociated exceedes 105 internal orifice of anchors slot, the rotation of another mistake hour hands
Turn actuator 202, take out actuator 202, the hanging hole of exposure 201 tail end of core bar, then the hanging hole of 201 tail end of core bar is drawn with part is hooked
Firmly, suitably pull out, can be suitable using 2011 termination of natural resiliency anchors when anchors 2011 reaches anchors 105 internal orifice of slot
And equally move towards to set and through the anchors slot 105 of side wall by preceding interior outer incline backward, and stretch out the bone outside screw body 1
In tissue, finally actuator 202 clockwise is screwed into component cavity volume 104 and blocks core bar 201 again.During as bone screws body 1 need to be back-outed,
Driving actuator 202 is first rotated clockwise, core bar 201 is headed into forward 104 deeper inside of component cavity volume, drives anchors 2011 forward
Mobile, anchors 2011, which stretches out screw outer portion, can recede into screw assembly cavity volume 104, finally pass through the head of a nail 101 with screwdriver
1 body of screw sheet is back-outed.
Above-described embodiment is only used for illustrating the inventive concept of the present invention, rather than the restriction to rights protection of the present invention,
All changes for carrying out unsubstantiality to the present invention using this design, should all fall into protection scope of the present invention.
Claims (8)
1. a kind of anchors strengthens bone screws, including screw body, screw body include the head of a nail, rivet nut and nail tip, rivet nut and nail tip
Screw thread is equipped with, the head of a nail is equipped with the structure for facilitating instrument to screw screw, it is characterised in that：It is additionally provided with anchors component, the screw
Body is equipped with axial pass-through holes and forms component cavity volume, and the anchors component includes core bar and for driving core bar in component cavity volume
The actuator being axially moveable, the core bar are integrally in the form of a column, and two laterally outsides, which obliquely extend from a pair, on the core bar has
The bar shaped flat member that one fixed width, front end are vacantly dissociated forms anchors；The component cavity volume inner wall is equipped with a pair of or a pair of
The same outward-dipping anchors slot through side wall above, is on axially distinct position, component cavity volume per a pair of anchors slot
The guide groove being connected with anchors slot, the core bar and the axially slidable cooperation of component cavity volume, institute are equipped with inner wall vertically
State actuator and component cavity volume is axially slidable, and formed with the component cavity volume inner wall in thread fitting and be detachably connected knot
Structure.
2. anchors according to claim 1 strengthens bone screws, it is characterised in that：The actuator is set with the core bar split
Put, actuator is to form the screw plug for being threadedly coupled and coordinating with component cavity volume inner wall, and the tail end of the core bar, which is equipped with, to be used to hook what is drawn
Hanging hole.
3. anchors according to claim 2 strengthens bone screws, it is characterised in that：The pair of anchors is symmetrical arranged, described
Anchors from it is rear it is interior tiltedly move towards to set to outward lean, respective anchors piece slot equally interior is tiltedly moved towards to set from rear to outward lean；Alternatively, institute
State anchors to move towards to set by preceding interior outer incline backward, respective anchors piece slot equally is moved towards to set by preceding interior outer incline backward.
4. anchors according to claim 2 strengthens bone screws, it is characterised in that：The component cavity volume inner wall is equipped with one
Pair or the more than one pair of anchors slot through side wall, per a pair of anchors slot be on axially distinct position, and be equipped with and
The axially guiding groove being connected.
5. anchors according to claim 1 strengthens bone screws, it is characterised in that：Before the rear end of the core bar and actuator
End forms the axial circumferentially opposed rotation connection that links, and the actuator forms with component cavity volume inner wall and is threadedly coupled cooperation.
6. anchors according to claim 5 strengthens bone screws, it is characterised in that：The front end of the actuator is in equipped with section
The caulking groove or cavity of convex, the rear end shape of the core bar is adapted with the caulking groove or cavity of the convex, and gap is matched somebody with somebody
Conjunction forms the axial circumferentially opposed rotation connection that links in the caulking groove or cavity of the convex.
7. the anchors according to claim 5 or 6 strengthens bone screws, it is characterised in that：The pair of anchors is symmetrical arranged, institute
State anchors from it is rear it is interior tiltedly move towards to set to outward lean, after respective anchors piece slot in tiltedly move towards to set to outward lean；Alternatively, the anchor
Piece is moved towards to set by preceding interior outer incline backward, and interior outer incline backward moves towards to set before respective anchors piece slot.
8. the anchors according to claim 5 or 6 strengthens bone screws, it is characterised in that：The component cavity volume inner wall is equipped with
The a pair or more of anchors slot through side wall, each pair anchors slot are on axially distinct position, and be equipped with
The axially guiding groove being connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247651.0A CN108013923A (en) | 2017-12-01 | 2017-12-01 | A kind of anchors strengthens bone screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247651.0A CN108013923A (en) | 2017-12-01 | 2017-12-01 | A kind of anchors strengthens bone screws |
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| Publication Number | Publication Date |
|---|---|
| CN108013923A true CN108013923A (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711247651.0A Pending CN108013923A (en) | 2017-12-01 | 2017-12-01 | A kind of anchors strengthens bone screws |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382380Y (en) * | 1999-07-09 | 2000-06-14 | 陈建庭 | Self inner locking intramedullary needle |
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| GB2421187A (en) * | 2004-12-14 | 2006-06-21 | Chawla Girish | Intramedullary bone support |
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| CN104083199A (en) * | 2014-07-25 | 2014-10-08 | 杨涛 | Self-locking pressurizing intramedullary nail capable of making two ends of fracture portion tightly joined |
| CN206080672U (en) * | 2016-07-12 | 2017-04-12 | 遵义医学院附属医院 | Cervical vertebra posterior approach operation set screw that singly opens door |
| CN208640858U (en) * | 2017-12-01 | 2019-03-26 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | A kind of anchors reinforcing bone screws |
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| CN2382380Y (en) * | 1999-07-09 | 2000-06-14 | 陈建庭 | Self inner locking intramedullary needle |
| EP1090596A1 (en) * | 1999-08-30 | 2001-04-11 | Sulzer Orthopedics Ltd. | Intramedullary nail for the humerus |
| GB2421187A (en) * | 2004-12-14 | 2006-06-21 | Chawla Girish | Intramedullary bone support |
| CN103654936A (en) * | 2012-09-17 | 2014-03-26 | 上海微创骨科医疗科技有限公司 | Pedicle screw with barbs, and pusher and method for forming pedicle screw |
| WO2014058367A1 (en) * | 2012-10-12 | 2014-04-17 | Swemac Innovation Ab | Fixing means for fixation of bone fragments at bone fractures |
| CN104083199A (en) * | 2014-07-25 | 2014-10-08 | 杨涛 | Self-locking pressurizing intramedullary nail capable of making two ends of fracture portion tightly joined |
| CN206080672U (en) * | 2016-07-12 | 2017-04-12 | 遵义医学院附属医院 | Cervical vertebra posterior approach operation set screw that singly opens door |
| CN208640858U (en) * | 2017-12-01 | 2019-03-26 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | A kind of anchors reinforcing bone screws |
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