CN105078556B - A kind of backbone tack plate structure for preventing that bone screws from exiting - Google Patents
A kind of backbone tack plate structure for preventing that bone screws from exiting Download PDFInfo
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- CN105078556B CN105078556B CN201410192617.8A CN201410192617A CN105078556B CN 105078556 B CN105078556 B CN 105078556B CN 201410192617 A CN201410192617 A CN 201410192617A CN 105078556 B CN105078556 B CN 105078556B
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- bone screws
- type turn
- backbone
- lock screw
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Abstract
The present invention provides a kind of backbone tack plate structure for preventing that bone screws from exiting, including backbone nail-plate, and the backbone nail-plate is provided with multiple connecting holes for being used to wear bone screws, in addition to c-type turn and lock screw, the lock screw include head and bar portion；The screwed hole for installation locking screw is provided with beside the connecting hole of the backbone nail-plate, the top of the screwed hole is provided with annular groove, the annular groove is connected with connecting hole, and the c-type turn is stuck in annular groove and can not moved upwards, and the part edge of c-type turn is extended in connecting hole；When bone screws are arranged in connecting hole, c-type turn gear is square over bone screw, and lock screw is in screwed hole, and the outer rim on the head of lock screw withstands on the inner side of c-type turn.The present invention effectively prevent bone screws in vertebral internal fixation and exit, and in operation, operation is simpler, saves operating time, reduces operation risk, is brought great convenience for modern vertebral internal fixation.
Description
Technical field
The present invention relates to medicine equipment, more particularly to a kind of apply the ridge for preventing bone screws from exiting in vertebral internal fixation
Stud harden structure.
Background technology
With the horizontal raising of modern medical service, also gradually increase for the countermeasure of various disease, it is solid wherein in backbone
It is exactly a kind of modern medical service gimmick for being used to treat such as spine fracture, slippage, deformity and degenerated unstability spinal disease to determine art,
It is mainly characterized by will be implanted into formula apparatus implantation patient's backbone by operation, to have the function that spinal fixation.Conventional
Spinal internal fixation system can be broadly divided into two classes：Nail-plate internal fixation system and nail rod internal fixation system.Nail-plate internal fixation system
Central link part is metal or nonmetallic nail-plate, and being connected to nail-plate using bone screws needs the two of fixed spine portion
End, backbone is fixed by limiting the relative motion of backbone both ends.It is that bone screws are arranged on into needs to follow closely rod internal fixation system
The both ends of fixed spine portion, then wearing rod iron over bone screw makes multiple bone screws turn into an entirety to backbone progress
It is fixed.Bone screws in wherein described nail-plate internal fixation system are likely to occur loosening after surgery, so that occur what is exited
Phenomenon, the bone screws in human body once exit, that is, are possible to injure neighbouring organ and tissue, patient are caused greatly
Danger, therefore, nail-plate internal fixation system need to be equipped with a reliable anti-bone screws extractor.The murices being commonly used
Nail retreating-proof device has mechanical Locking, ailhead expansion type, fixed dam formula, chute baffle-type, rotary switch and rotation cam
Formula etc.；The wherein implant angle of mechanical Locking and ailhead expansion type due to limiting bone screws too much, so seldom in ridge
Used in stud plate internal fixation system, the assembling process of fixed dam formula is cumbersome, and chute baffle-type, rotary-switch and rotation are convex
It is wheeled to have certain uncertainty when in use.In place of the above-mentioned mode for preventing bone screws from exiting all comes with some shortcomings, therefore
Need a kind of backbone tack plate structure for overcoming above-mentioned deficiency and can preventing bone screws from exiting.
The content of the invention
The technical problem to be solved in the present invention, which is to provide, a kind of simple in construction, easy to use prevents what bone screws from exiting
Backbone tack plate structure, to overcome the drawbacks described above of prior art.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：A kind of backbone for preventing that bone screws from exiting
Tack plate structure, including backbone nail-plate, the backbone nail-plate are provided with multiple connecting holes for being used to wear bone screws, in addition to c-type
Turn and lock screw, the lock screw include head and bar portion；It is provided with and is used for beside the connecting hole of the backbone nail-plate
The screwed hole of installation locking screw, the top of the screwed hole are provided with annular groove, and the annular groove connects with connecting hole, the C
Type turn, which is stuck in annular groove, to move upwards, and the part edge of c-type turn is extended in connecting hole；When bone screws are pacified
In connecting hole, c-type turn gear side over bone screw, lock screw is in screwed hole, and the head of lock screw
Outer rim withstands on the inner side of c-type turn.
Preferably, spacing preiection is provided with the outside of the c-type turn, the groove edge of the annular groove is provided with matches somebody with somebody with spacing preiection
The stopper slot of conjunction.
Preferably, between two adjacent connecting holes, one c-type turn is kept off the screwed hole under normal conditions
The top of bone screws in two connecting holes.
Preferably, four boss, the head of the lock screw are uniformly provided with the inside circumference face of the c-type turn
Outer rim is acted against on boss.
As described above, a kind of backbone tack plate structure for preventing that bone screws from exiting of the present invention, has the advantages that：
C-type turn is arranged in backbone nail-plate and kept off under normal conditions above the head of screw of bone screws in the present invention,
It effectively prevent bone screws to exit, and be further ensured that the work shape of c-type turn by lock-screw in the present invention
State, make the present invention more safe and reliable when in use.In addition, c-type turn and lock screw in the present invention are because will not be by
To the effect of very big power, so its material selection range is big, metal or nonmetallic materials.Backbone of the invention and traditional
Nail-plate is compared, and c-type turn and lock-screw have been preset on backbone nail-plate, without assembling the additional steps such as baffle plate in addition, no
Only in operation, operation is simpler, and saves operating time, reduces operation risk, and pole is brought for modern vertebral internal fixation
It is big convenient.
Brief description of the drawings
Fig. 1 is spine nail plate schematic diagram in the present invention.
Fig. 2 is sectional view at A-A in Fig. 1.
Fig. 3 is the schematic diagram of c-type turn in the present invention.
Fig. 4 is structure principle chart of the present invention.
Fig. 5 is embodiments of the present invention broken away view.
Fig. 6 is the working state schematic representation of the present invention.
In figure：The connecting hole of 1 backbone nail-plate 11
The annular groove of 12 screwed hole 13
The c-type turn of 131 stopper slot 2
The boss of 21 spacing preiection 22
The bone screws of 3 lock screw 4
Embodiment
Structure, ratio, size depicted in Figure of description etc., only to coordinate the content disclosed in specification, with
Understand for those skilled in the art and read, be not limited to the enforceable qualifications of the present invention, therefore do not have technically
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, can be generated not influenceing the present invention
Under effect and the purpose that can reach, all should still it fall in the range of disclosed technology contents can be covered.Meanwhile
Cited such as " on ", " under ", "front", "rear", " centre " term, are merely convenient to the clear of narration in this specification, and
It is not used to limit the enforceable scope of the present invention, its relativeness is altered or modified, in the case where changing technology contents without essence, when
Also it is considered as the enforceable category of the present invention.
The present invention is applied to prevent bone screws from exiting in vertebral internal fixation.As shown in figures 1 to 6, the present invention includes spine nail
Plate 1, the backbone nail-plate 1 are provided with multiple connecting holes 11 for being used to wear bone screws 4；In addition, present invention additionally comprises c-type spring
Circle 2 and lock screw 3.The lock screw 3 includes head and bar portion；The side of connecting hole 11 of the backbone nail-plate 1, which is provided with, to be used
In the screwed hole 12 of installation locking screw 3, the top of the screwed hole 12 is provided with annular groove 13, the annular groove 13 and connecting hole
11 connections, the c-type turn 2 are stuck in annular groove 13 and can not moved upwards, and the part edge of c-type turn 2 extends to company
Connect in hole 11.When bone screws 4 are arranged in connecting hole 11, c-type turn 2 is kept off above bone screws 4, and lock screw 3 is arranged on
In screwed hole 12, and the outer rim on the head of lock screw 3 withstands on the inner side of c-type turn 2, and limitation c-type turn 2 shrinks, entered
And reach the effect for preventing that bone screws 4 from exiting.
As shown in Figure 1,3, the outside of the c-type turn 2 is provided with spacing preiection 21, the groove edge of the annular groove 13 provided with
The stopper slot 131 that spacing preiection 21 coordinates, shown spacing preiection 21 and stopper slot 131 can limit c-type turn 2 in ring after coordinating
Position in shape groove 13, prevent from offseting.
With reference to Fig. 1,4,6, in the present embodiment, the screwed hole 12 is between two connecting holes 11, one c-type bullet
Spring coil 2 keeps off the top of the bone screws 4 in two connecting holes 11 under normal conditions, prevents bone screws 4 from exiting.
Four boss 22 are uniformly provided with the inside circumference face of the c-type turn 2, outside the head of the lock screw 3
Edge is acted against on boss 22；Ensure the opening dimension size of c-type turn 2 by boss 22, limit its contraction, it is ensured that c-type bullet
Spring coil 2, which can be kept off above connecting hole 11, prevents bone screws 4 from exiting.
With reference to Fig. 1-6, application method of the invention and operation principle are：C-type turn 2 is loaded into backbone nail-plate 1 first
On annular groove 13 in, and 21 spacing preiections 21 allowed on c-type turn 2 are engaged with the stopper slot 131 of the groove edge of annular groove 13,
As shown in figure 4, the c-type turn 2 after installing keeps the opening shape under normality, i.e. c-type turn 2 is kept off on connecting hole 11, but
It is that c-type turn 2 can be flared out a certain size to contract or again, install because c-type turn 2 has opening
By the inwardly compression in the direction of the arrow of c-type turn 2 during bone screws 4, thus c-type turn 2 will not hinder the peace of follow-up bone screws 4
Dress.After c-type turn 2 installs, the shank portion of lock screw 3 is screwed in the screwed hole 12 of backbone nail-plate 1, but should not
Screw, and to ensure the head of lock screw 3 in the top of c-type turn 2 to allow c-type turn 2 to contract.
After assembling, the present apparatus is placed into the backbone position to be fixedly connected, bone screws 4 are penetrated from connecting hole 11 and screw in ridge
Post, when screwing in bone screws 4, c-type turn 2 is inwardly compressed, the head of screw of bone screws 4 is reached c-type turn 2
Lower section.After bone screws 4 install, bone screws 4 are located at the lower section of c-type turn 2, and now c-type turn 2 opens recovery again
To normality and keep off above the head of screw of bone screws 4.With reference to Fig. 4,6, after bone screws 4 fix, lock screw 3 is further revolved
Enter screwed hole 12 until the outer rim on the head of lock screw 3 is acted against on the boss 22 of the inner side of c-type turn 2 so that c-type spring
Circle 2 loses to the space of contract and is unable to deformation retract, and then also ensures that bone screws 4 can not exit；And in this reality
Apply in example, even if lock screw 3 is loosened, c-type turn 2 as opening shape in itself that be in the normal state and keep off even
The top of hole 11 is connect, further prevents exiting for bone screws 4.
In the above-described embodiments, the normality of the c-type turn 2 is needed c-type to open shape when installing bone screws 4
Turn 2 inwardly compresses, and c-type turn 2 is always maintained at the opening shape of normality during work.In addition, the present invention also has another kind real
Apply mode：The normality of c-type turn 2 to be contraction-like, that is, be directly passed through when bone screws 4 are installed connecting hole 11 screw in backbone and
C-type turn 2 need not inwardly be compressed；Then when further screwing lock screw 3, the head of lock screw 3 is outside
Strutting c-type turn 2 and being kept off the tops of the bone screws 4 in connecting hole 11 prevents bone screws 4 from exiting.This reality in addition to above-mentioned difference
It is identical with the first embodiment with principle to apply other steps in example.
In summary, a kind of backbone tack plate structure for preventing that bone screws from exiting of device of the invention, can solve the problem that spine nail
The problem of bone screws exit in plate.So effectively to overcome some practical problems of the prior art very high so as to have by the present invention
Value and use meaning.
The principle and its effect of the above-mentioned embodiment only illustrative present invention, not for the limitation present invention.This hair
It is bright to also have many aspects to be improved on the premise of without prejudice to overall thought, all can be for those skilled in the art
Without prejudice under the spirit and scope of the present invention, modifications and changes can be carried out to above-described embodiment.Therefore, art such as
Middle tool usually intellectual without departing from disclosed spirit and all equivalent modifications for being completed under technological thought or
Change, should be covered by the claim of the present invention.
Claims (2)
1. a kind of backbone tack plate structure for preventing that bone screws from exiting, including backbone nail-plate (1), the backbone nail-plate (1) is provided with
Multiple connecting holes (11) for being used to wear bone screws (4), it is characterised in that：Also include c-type turn (2) and lock screw (3),
The lock screw (3) includes head and bar portion；It is provided with beside the connecting hole (11) of the backbone nail-plate (1) and is used for installation locking
The screwed hole (12) of screw (3), the top of the screwed hole (12) are provided with annular groove (13), the annular groove (13) and connecting hole
(11) connect, the c-type turn (2) is stuck in annular groove (13) and can not moved upwards, the part edge of c-type turn (2)
Extend in connecting hole (11)；When bone screws (4) are arranged in connecting hole (11), c-type turn (2) is kept off in bone screws (4)
Side, lock screw (3) is in screwed hole (12), and the outer rim on the head of lock screw (3) withstands on the interior of c-type turn (2)
Side；The screwed hole (12) between two adjacent connecting holes (11), keep off under normal conditions by one c-type turn (2)
The top of bone screws (4) in two connecting holes (11), c-type turn (2) outside are provided with spacing preiection (21), the annular
The groove edge of groove (13) is provided with the stopper slot (131) coordinated with spacing preiection (21).
A kind of 2. backbone tack plate structure for preventing that bone screws from exiting according to claim 1, it is characterised in that：The c-type
It is uniformly provided with four boss (22) on the inside circumference face of turn (2), the external edge of head of the lock screw (3) acts against convex
On platform (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410192617.8A CN105078556B (en) | 2014-05-08 | 2014-05-08 | A kind of backbone tack plate structure for preventing that bone screws from exiting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410192617.8A CN105078556B (en) | 2014-05-08 | 2014-05-08 | A kind of backbone tack plate structure for preventing that bone screws from exiting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105078556A CN105078556A (en) | 2015-11-25 |
| CN105078556B true CN105078556B (en) | 2018-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410192617.8A Active CN105078556B (en) | 2014-05-08 | 2014-05-08 | A kind of backbone tack plate structure for preventing that bone screws from exiting |
Country Status (1)
| Country | Link |
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| CN (1) | CN105078556B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109758221B (en) * | 2019-03-29 | 2023-10-24 | 大博医疗科技股份有限公司 | Composite locking bone fracture plate |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2810532B1 (en) * | 2000-06-26 | 2003-05-30 | Stryker Spine Sa | BONE IMPLANT WITH ANNULAR LOCKING MEANS |
| US7041105B2 (en) * | 2001-06-06 | 2006-05-09 | Sdgi Holdings, Inc. | Dynamic, modular, multilock anterior cervical plate system having detachably fastened assembleable and moveable segments |
| DE10152094C2 (en) * | 2001-10-23 | 2003-11-27 | Biedermann Motech Gmbh | Bone fixation device |
| US6695846B2 (en) * | 2002-03-12 | 2004-02-24 | Spinal Innovations, Llc | Bone plate and screw retaining mechanism |
| US7004944B2 (en) * | 2002-07-16 | 2006-02-28 | Sdgi Holdings, Inc. | Bone plate fastener retaining mechanisms and methods |
| US7862597B2 (en) * | 2002-08-22 | 2011-01-04 | Warsaw Orthopedic, Inc. | System for stabilizing a portion of the spine |
| US7175624B2 (en) * | 2002-12-31 | 2007-02-13 | Depuy Spine, Inc. | Bone plate and screw system allowing bi-directional assembly |
| US7857839B2 (en) * | 2003-09-03 | 2010-12-28 | Synthes Usa, Llc | Bone plate with captive clips |
| US7727266B2 (en) * | 2004-06-17 | 2010-06-01 | Warsaw Orthopedic, Inc. | Method and apparatus for retaining screws in a plate |
| US20070225718A1 (en) * | 2006-03-22 | 2007-09-27 | Ensign Michael D | Rotolock cervical plate locking mechanism |
| US8702762B2 (en) * | 2007-03-27 | 2014-04-22 | Depuy Spine, Inc. | Passive screw locking mechanism |
| CH700839A2 (en) * | 2009-04-20 | 2010-10-29 | Creaholic Sa | Fixing device for surgical mounting system. |
| US8454667B2 (en) * | 2010-12-16 | 2013-06-04 | Warsaw Orhtopedic, Inc. | Retaining mechanism |
| EP2908752A4 (en) * | 2012-10-19 | 2016-08-10 | Deroyal Ind Inc | Cervical plate with retaining clip |
| CN203089334U (en) * | 2012-12-27 | 2013-07-31 | 苏州欣荣博尔特医疗器械有限公司 | Self-lock type cervical spine anterior plate |
| CN203898417U (en) * | 2014-05-08 | 2014-10-29 | 上海三友医疗器械有限公司 | Spinal nail plate structure preventing bone screws from dropping out |
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- 2014-05-08 CN CN201410192617.8A patent/CN105078556B/en active Active
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| CN105078556A (en) | 2015-11-25 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Mingyan Inventor after: Liu Ruifeng Inventor after: Zhang Wenqiao Inventor before: Liu Mingyan Inventor before: Liu Ruifeng Inventor before: Zhang Wenqiao Inventor before: Huang Jiachun |
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| COR | Change of bibliographic data | ||
| CB02 | Change of applicant information |
Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Applicant after: Shanghai Sanyou medical equipment Limited by Share Ltd Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Applicant before: Shanghai Sanyou Medical Devices Co., Ltd. |
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| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20151125 Assignee: Tuoteng (Suzhou) Medical Technology Co.,Ltd. Assignor: SHANGHAI SANYOU MEDICAL Co.,Ltd. Contract record no.: X2021310000036 Denomination of invention: Spine nail plate structure for preventing bone screw from withdrawing Granted publication date: 20180206 License type: Common License Record date: 20210930 |