CN208974077U - A kind of barb-type swell fixture injecting bone cement - Google Patents
A kind of barb-type swell fixture injecting bone cement Download PDFInfo
- Publication number
- CN208974077U CN208974077U CN201721000861.5U CN201721000861U CN208974077U CN 208974077 U CN208974077 U CN 208974077U CN 201721000861 U CN201721000861 U CN 201721000861U CN 208974077 U CN208974077 U CN 208974077U
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- Prior art keywords
- struts
- hole
- strut
- barb
- rivet nut
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- 239000002639 bone cement Substances 0.000 title claims abstract description 26
- 238000003780 insertion Methods 0.000 claims abstract description 7
- 230000037431 insertion Effects 0.000 claims abstract description 7
- 238000001727 in vivo Methods 0.000 claims abstract description 3
- 230000004308 accommodation Effects 0.000 claims description 7
- 210000000988 bone and bone Anatomy 0.000 abstract description 12
- 230000009977 dual effect Effects 0.000 abstract description 6
- 230000001225 therapeutic effect Effects 0.000 abstract description 6
- 238000001356 surgical procedure Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 208000001132 Osteoporosis Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000517325 Pediculus Species 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
A kind of barb-type swell fixture injecting bone cement, it is related to bone surgery swell fixture field, including screw rivet nut, it is equipped in the rivet nut longitudinally through, lower inner diameter is greater than the stepped hole of upper inner diameter, rivet nut lower end is equipped in insertion stepped hole lower part and struts body, it struts to be equipped in vivo and struts hole, strut the distraction mouth that at least two upper ends opening is evenly equipped on body, rivet nut lower part is circumferentially evenly equipped with inverted U-shaped expansion wire casing, inverted U-shaped expansion wire casing encloses on rivet nut lower part to be cut out barb-type and struts piece, each barb-type strut between piece and two distraction mouths to strut body opposite；It struts and is equipped in the stepped hole above body and struts hole cooperation, will strut that body is distracted outward to strut axis.It is simple with structure, easy to use, while realizing bone cement nail and swell fixture dual function, it is simple to operate, save operating time, the advantages that therapeutic effect is good.
Description
Technical field
The present invention relates to bone surgery swell fixture field, elaborating is that a kind of structure is simple, easy to use, while real
Existing bone cement nail and swell fixture dual function, it is simple to operate, save operating time, therapeutic effect it is good inject bone water
The barb-type swell fixture of mud.
Background technique
It is known that the various structures of existing bone surgery swell fixture, but it is using support rod in screw
The inside insertion of main body is strutted by being threadedly engaged to expand outwardly screw body lower end.As State Intellectual Property Office discloses
One filed in August in 2015 21st, the utility model patent of entitled medical expansion type pediculus arcus vertebrac screw and its installation tool,
The holding power of this swell fixture is low, easily slides out, and screw strut after can not restore.Existing bone surgery swell fixture
It is to be separately provided with bone cement nail, surgical procedure needs to operate twice to complete respective function, not only waste of resource, cost
Height, and it is troublesome in poeration, operating time is long, therapeutic effect is poor.
Summary of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art, and it is simple, easy to use while real to provide a kind of structure
Existing bone cement nail and swell fixture dual function, it is simple to operate, save operating time, therapeutic effect it is good inject bone water
The barb-type swell fixture of mud.
The present invention solves technical solution used by above-mentioned the deficiencies in the prior art:
A kind of barb-type swell fixture injecting bone cement, including screw rivet nut, it is characterised in that in the rivet nut
It is greater than the stepped hole of upper inner diameter equipped with longitudinally through, lower inner diameter, rivet nut lower end is equipped with strutting in insertion stepped hole lower part
Body struts in vivo equipped with hole is strutted, struts the distraction mouth for being evenly equipped at least two upper ends opening on body, rivet nut lower part is circumferentially equal
It is furnished with inverted U-shaped expansion wire casing, inverted U-shaped expansion wire casing encloses on rivet nut lower part to be cut out barb-type and strut piece, and each barb-type struts
Between piece and two distraction mouths to strut body opposite；It struts and is equipped in the stepped hole above body and struts hole cooperation, body will be strutted
It is distracted outward to strut axis.
It is heretofore described strut axis be less than in lower end outer diameter strut hole, upper end outer diameter is greater than and struts the round table-like of hole,
The lower end for strutting axis is located in the top for strutting hole.
The heretofore described axis upper end that struts is equipped with the cylindrical guide section matched with stepped hole top.Cylinder is led
It is less than the internal diameter on stepped hole top to the outer diameter of section, the outer diameter of cylindrical guide section is usually the 0.8- of stepped hole upper inner diameter
0.99 times, preferably 0.9-0.95 times play guiding, stable effect.
The heretofore described importing bar for strutting axis lower end and being equipped with strutting hole and match, importing bar lower end is in round end
Shape.It is more conducive to strut axis and enters and strut in hole, and play the effect stablized and strut axis.
The heretofore described outer diameter for strutting body is greater than the internal diameter on stepped hole top, less than the internal diameter of stepped hole lower part,
Strut hole upper end struts body equipped with the taper entrance hole coaxial with hole is strutted.Taper entrance hole and strut axis lower end cooperation,
It is easier to it into hole upper end is strutted, it is more convenient to assemble.
It is heretofore described strut be equipped in the middle part of body diameter be greater than strut shaft diameter strut axis accommodation groove.Strutting axis can
Completely into strut in axis accommodation groove, both clearance fit.
It is heretofore described to strut that hole or more is longitudinally through to strut body, hole, which is strutted, in upper inner diameter is less than lower inner diameter
Stepped hole shape；The internal diameter for strutting hole lower part, which is greater than, struts shaft diameter.Strutting axis can be completely into strutting in hole.
The heretofore described body that struts is installed in rivet nut lower part from stepped hole lower end is axially slidable, rivet nut lower part
It is equipped with corresponding pin hole with body lower part is strutted, is equipped with the locking pin that the two is fixedly linked in pin hole.
The heretofore described body lower end that struts is equipped with the limit baffle ring being located at below rivet nut.Limit baffle ring prevents from strutting body
It is easy for installation from stepped hole lower end completely into rivet nut lower part
Heretofore described screw rivet nut is the rivet nut of Universal screw nail.
Heretofore described screw rivet nut is the rivet nut of Universal pedicle screw.
In the use of the present invention, after screw rivet nut is implanted into the patient, using mandril from the insertion of the upper end of stepped hole, to
Lower promotion struts axis, strut axis enter strut body strut hole during, the body that struts between two distraction mouths is supportted outward
It opens, the distracted body compressing barb-type that struts struts piece and outwardly opens outward.Cement injection device can pass through stepped hole
Bone cement is perfused into rivet nut, bone cement expands the opening that wire casing is thought of as by U-shaped and enters in the bone that screw rivet nut is implanted into, increases
Big bone struts the retrogressing that piece can effectively prevent screw to the ability to bear of power, thorn formula；It is particularly suitable for the bones such as osteoporosis
The patient low to external force ability to bear uses.When occurring needing replacing screw situation, continue to push down on and strut axis, is pushed away
Enter to strut axis accommodation groove or strut in the lower part of hole, struts axis and do not strut body abutting against, strut body and revert to original state, barb-type struts
Piece is inwardly collapsed, is restored, and screw can be smooth taking-up.The present invention has structure simple, easy to use, while realizing that bone cement is followed closely
It is simple to operate, save operating time, the advantages that therapeutic effect is good with swell fixture dual function.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention.
Fig. 2 is partial enlarged view at the A of Fig. 1.
Fig. 3 is configuration schematic diagram of the invention.
Fig. 4 is the structural schematic diagram of pedicle screw in the present invention.
Specific embodiment
The barb-type swell fixture for injecting bone cement as shown in Figs. 1-3, including screw rivet nut 1, interior be equipped with of rivet nut are indulged
It is greater than the stepped hole 2 of upper inner diameter to perforation, lower inner diameter, 1 lower end of rivet nut is equipped in insertion 2 lower part of stepped hole and struts body 5,
It struts in body 5 and struts hole 8 equipped with longitudinally through, strut the support for being circumferentially evenly equipped at least two longitudinal upper end openings on body 5
Open item mouth 6,1 lower part of rivet nut is circumferentially evenly equipped with inverted U-shaped expansion wire casing 9, inverted U-shaped expansion wire casing 9 encloses on rivet nut lower part cut out under
The barb-type being fixedly connected with rivet nut is held to strut piece 3, each barb-type struts piece 3 and struts on body 3 between two distraction mouths
It is opposite to strut body；Between two distraction mouths when strutting body and strutting outward, push barb-type to strut outer on piece 3 struts.From figure
Two opposite distraction mouths are longitudinally equipped with as can be seen that strutting on body 5,1 lower part of rivet nut sets that there are two inverted U-shaped expansions accordingly
Wire casing 9 ensure that the intensity of rivet nut while reaching effect.Strut be equipped in the stepped hole above body with strut hole cooperation,
Body top will be strutted and distracted strut axis 4 outward at distraction mouth 6；Axis is strutted in outside lower end from can be seen that in Fig. 1, Fig. 2
Diameter, which is less than, struts hole, upper end outer diameter greater than the round table-like of hole is strutted, and struts axis upper end and is equipped with the circle matched with stepped hole top
Cylindricality guide section.The outer diameter of cylindrical guide section is less than the internal diameter on stepped hole top, and the outer diameter of cylindrical guide section is usually rank
0.8-0.99 times of terraced hole upper inner diameter, plays guiding, stable effect by preferably 0.9-0.95 times；Strut axis lower end be equipped with
The importing bar that hole matches is strutted, importing bar lower end is in round end shape.It is more conducive to strut axis and enters and strut in hole, and play stable support
Open the effect of axis；The importing bar for strutting the lower end of axis is located in the top for strutting hole.It can be seen from fig. 1 and fig. 2 that the support
It is longitudinally through above and below aperture to strut body, strut the stepped hole shape that hole is less than lower inner diameter in upper inner diameter；Strut the interior of hole lower part
Diameter, which is greater than, struts diameter on axis at maximum gauge, and strutting axis can be completely into strutting in hole or described strut in the middle part of body
Axis accommodation groove is strutted greater than the diameter strutted on axis at maximum gauge equipped with diameter；Strutting axis can accommodate completely into axis is strutted
In slot, both clearance fit；When strutting axis into when strutting axis accommodation groove or strutting in the lower part of hole, barb-type struts piece and inwardly receives
Hold together, restore, screw can be smooth taking-up.
The present invention be further improved, described in the outer diameter for strutting body be greater than stepped hole top internal diameter, be less than stepped hole
The internal diameter of lower part, strut hole upper end struts body equipped with the taper entrance hole coaxial with hole is strutted.Taper entrance hole with strut
The cooperation of axis lower end is easier to it into hole upper end is strutted, and it is more convenient to assemble.It is described to strut body and axially be slided from stepped hole lower end
Dynamic is installed in rivet nut lower part, and rivet nut lower part is equipped with corresponding pin hole with body lower part is strutted, and being equipped in pin hole will
The locking pin 7 that the two is fixedly linked.Locking pin 7 ensures to strut body not rotation, makes to strut that body is distracted outward supports in barb-type
Hacking is opposite.The body lower end that struts is equipped with the limit baffle ring being located at below rivet nut；Limit baffle ring prevents from strutting body from ladder
Hole lower end is easy for installation completely into rivet nut lower part.Heretofore described screw rivet nut can be plain screw rivet nut,
It is also possible to the rivet nut of Universal screw nail or the rivet nut of Universal pedicle screw.As shown in figure 4, screw rivet nut is as universal pedicle of vertebral arch
When screw rivet nut；Rivet nut upper end is equipped with bulb 12, and rivet nut is connected with screw base 10 through bulb 12, and screw base 10 is equipped with and sets stick
Slot, screw base is interior to be equipped with bulb pressure ring 11.
In the use of the present invention, after screw rivet nut is implanted into the patient, using mandril from the insertion of the upper end of stepped hole, to
Lower promotion struts axis, strut axis enter strut body strut hole during, the body that struts between two distraction mouths is supportted outward
It opens, the distracted body compressing barb-type that struts struts piece and outwardly opens outward.Cement injection device can pass through stepped hole
Bone cement is perfused into rivet nut, bone cement expands the opening that wire casing is thought of as by U-shaped and enters in the bone that screw rivet nut is implanted into, increases
Big bone struts the retrogressing that piece can effectively prevent screw to the ability to bear of power, thorn formula；It is particularly suitable for the bones such as osteoporosis
The patient low to external force ability to bear uses.When occurring needing replacing screw situation, continue to push down on and strut axis, is pushed away
Enter to strut axis accommodation groove or strut in the lower part of hole, struts axis and do not strut body abutting against, strut body and revert to original state, barb-type struts
Piece is inwardly collapsed, is restored, and screw can be smooth taking-up.The present invention has structure simple, easy to use, while realizing that bone cement is followed closely
It is simple to operate, save operating time, the advantages that therapeutic effect is good with swell fixture dual function.Rivet nut expansion and note
Enter bone cement and dual humidification is played to the holding power of screw, is suitable for sufferers of osteoporosis face.
Claims (10)
1. one kind can inject the barb-type swell fixture of bone cement, including screw rivet nut, it is characterised in that set in the rivet nut
There is longitudinally through, lower inner diameter to be greater than the stepped hole of upper inner diameter, rivet nut lower end is equipped in insertion stepped hole lower part and struts body,
It struts to be equipped in vivo and struts hole, strut the distraction mouth for being evenly equipped at least two upper ends opening on body, rivet nut lower part is circumferentially uniformly distributed
There is an inverted U-shaped expansion wire casing, inverted U-shaped expansion wire casing encloses on rivet nut lower part to be cut out barb-type and strut piece, and each barb-type struts piece
Between two distraction mouths to strut body opposite；Strut be equipped in the stepped hole above body with strut hole cooperation, will strut body to
It is distracted outside to strut axis.
2. the barb-type swell fixture according to claim 1 for injecting bone cement, which is characterized in that described struts axis
It is less than in lower end outer diameter and struts hole, upper end outer diameter greater than the round table-like of hole is strutted, the lower end for strutting axis is located at the top for strutting hole
It is interior.
3. the barb-type swell fixture according to claim 1 or 2 for injecting bone cement, which is characterized in that the support
It opens axis upper end and is equipped with the cylindrical guide section matched with stepped hole top.
4. the barb-type swell fixture according to claim 3 for injecting bone cement, which is characterized in that described struts axis
Lower end be equipped with the importing bar that struts hole and match, importing bar lower end is in round end shape.
5. the barb-type swell fixture according to claim 1 for injecting bone cement, which is characterized in that described struts body
Outer diameter be greater than the internal diameter on stepped hole top, less than the internal diameter of stepped hole lower part, the body that struts for strutting hole upper end is equipped with and support
The coaxial taper entrance hole of aperture.
6. the barb-type swell fixture according to claim 1 for injecting bone cement, which is characterized in that described struts body
Middle part be equipped with diameter be greater than strut shaft diameter strut axis accommodation groove.
7. the barb-type swell fixture according to claim 1 for injecting bone cement, which is characterized in that described struts hole
It is longitudinally through up and down to strut body, strut the stepped hole shape that hole is less than lower inner diameter in upper inner diameter；The internal diameter for strutting hole lower part is big
In strutting shaft diameter.
8. the barb-type swell fixture according to claim 1 for injecting bone cement, which is characterized in that described struts body
It is installed in rivet nut lower part from stepped hole lower end is axially slidable, rivet nut lower part is equipped with corresponding insert with body lower part is strutted
Pin hole, pin hole is interior to be equipped with the locking pin that the two is fixedly linked.
9. the barb-type swell fixture according to claim 1 for injecting bone cement, which is characterized in that described struts body
Lower end is equipped with the limit baffle ring being located at below rivet nut.
10. the barb-type swell fixture according to claim 1 for injecting bone cement, which is characterized in that the screw
Rivet nut is the rivet nut of Universal pedicle screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721000861.5U CN208974077U (en) | 2017-08-11 | 2017-08-11 | A kind of barb-type swell fixture injecting bone cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721000861.5U CN208974077U (en) | 2017-08-11 | 2017-08-11 | A kind of barb-type swell fixture injecting bone cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208974077U true CN208974077U (en) | 2019-06-14 |
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ID=66777143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721000861.5U Active CN208974077U (en) | 2017-08-11 | 2017-08-11 | A kind of barb-type swell fixture injecting bone cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208974077U (en) |
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2017
- 2017-08-11 CN CN201721000861.5U patent/CN208974077U/en active Active
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