CN208958308U - The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system - Google Patents
The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system Download PDFInfo
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- CN208958308U CN208958308U CN201820914893.4U CN201820914893U CN208958308U CN 208958308 U CN208958308 U CN 208958308U CN 201820914893 U CN201820914893 U CN 201820914893U CN 208958308 U CN208958308 U CN 208958308U
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Abstract
The utility model relates to a kind of universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive to nail on nail system, including pedicle of vertebral arch screw nail seat and the button being installed in pedicle of vertebral arch screw nail seat, button includes bar portion and the ball head set on bar portion top, ball head inner wall has spherical, and spherical center has the interconnecting piece for being coaxially disposed and upwardly extending with bar portion；Pedicle of vertebral arch screw nail seat bottom has the spherical outside surface to match with the spherical of ball head, spherical outside surface it is pluggable enter the spherical in, pedicle of vertebral arch screw nail seat bottom interior wall has Internal Spherical Surface, adjusting nut is arranged in Internal Spherical Surface, adjusting nut outer wall and Internal Spherical Surface are interference fitted, and the interconnecting piece of adjusting nut inner wall and ball head is connected through a screw thread.The universal unidirectional unification pedicle of vertebral arch screw of the vertebral column minimally invasive nail on nail system follow closely rapidly it is convenient and strength-saving, implantation skeleton it is secured, be not easy to loosen.
Description
Technical field:
The utility model relates to the universal unidirectional unification pedicles of vertebral arch of the field of medical instrument technology more particularly to a kind of vertebral column minimally invasive
Nail system on screw.
Background technique:
When spine fracture or slip needs to be reset, needs to stablize after lumbar decompression, to increase fusion rate when, often need additional
Internal fixation system, the present minimally invasive pedicle screw surgery systems of percutaneous puncture, are by the hole of size as several keys, accurately
Screw and pitman are placed in, is not required to do long notch and removing muscle, avoids conventional therapy and broken caused by muscle
It is bad, there are the advantages such as notch is small, remove less, wound is small, bleeding is few, beautiful, recovery is fast.
Nail system generally all includes pedicle of vertebral arch screw nail seat and is installed on vertebra on existing minimally invasive zero degree rotation pedicle screw
Zero degree button in pedicle screw seat, it is a kind of novel unidirectional universal two-in-one as disclosed in Patent No. CN203724199U
Pedicle nail, however such pedicle of vertebral arch screw nails on nail system since structure limits, ball head has step surface, which leads
Cause the contact surface of ball head and screw base smaller, ball head often deviates from screw base in rotation use process, for band of performing the operation
Inconvenience is carried out.
Utility model content:
The purpose of this utility model be in view of the drawbacks of the prior art, provide it is a kind of it is easy to assembly, can to reduce nail difficult
It spends, prevent the universal unidirectional unification pedicle of vertebral arch screw of the vertebral column minimally invasive for loosening, saving operating time from nailing on nail system.
The utility model is achieved by the following technical solution: a kind of universal unidirectional unification pedicle screw of vertebral column minimally invasive
Upper nail system, including pedicle of vertebral arch screw nail seat and the button being installed in pedicle of vertebral arch screw nail seat,
The button includes bar portion and the ball head set on bar portion top, and the ball head inner wall has spherical support
Face, the spherical center have the interconnecting piece for being coaxially disposed and upwardly extending with bar portion；
Pedicle of vertebral arch screw nail seat bottom has the spherical outside surface to match with the spherical of ball head, the spherical outside surface
It is pluggable enter the spherical in, the pedicle of vertebral arch screw nail seat bottom interior wall has Internal Spherical Surface, is arranged in the Internal Spherical Surface
There is adjusting nut, the adjusting nut outer wall and Internal Spherical Surface are interference fitted, and the interconnecting piece of adjusting nut inner wall and ball head passes through
It is threadedly coupled, the spherical outside surface of pedicle of vertebral arch screw nail seat can be driven to move along the supporting surface of ball head by adjusting nut；
Pedicle of vertebral arch screw nail seat inner cavity is additionally provided with locking assembly, and the locking assembly includes locking plug screw, pitman
And intermediate, the intermediate lid are located at the adjusting nut and/or interconnecting piece top, the pitman is arranged on intermediate top
End, pitman both ends extend through pedicle screw, and the locking plug screw setting locks plug screw and pedicle of vertebral arch on pitman top
The connection of screw thread in inner cavity, locking plug screw can lock intermediate by pitman.
In order to further prevent pedicle of vertebral arch screw nail seat to deviate from out of ball head, and prevent from rotating in its use process,
The spherical inner wall offers several card slots, and the Internal Spherical Surface inner wall offers card slot.
In one preferred embodiment of the utility model, the intermediate includes platform part and lug boss, the interconnecting piece top
End offers inner hole, the lug boss of intermediate it is pluggable enter the inner hole in, the platform part of intermediate and adjusting nut and/or company
The top end surface of socket part leans.Preferably, the intermediate upper surface is covered with retaining ring.
In the utility model another preferred embodiment, the intermediate center offers through-hole, the interconnecting piece top
Be provided with lug boss, the lug boss it is pluggable enter intermediate through-hole in, the end face of intermediate and adjusting nut and/or connection
The top end surface in portion leans.
In order to further prevent moving back the risk of nail, the bar portion includes close to the first threaded portion of ball head and far from bulb
Second threaded portion in portion, the screw pitch of the screw pitch of first threaded portion less than the second threaded portion.
The beneficial effect of nail system is on the minimally invasive zero degree rotation pedicle screw of the utility model:
1, due to the universal unidirectional unification using the utility model in vertebral column minimally invasive percutaneous cervical arc root screw surgery systems
Pedicle screw, reduces pedicle nail type in surgical procedure, and the field range during open upper nail reduces operation
In wear the operation difficulty of stud, save operating time, reduce the risk in operation；
2, have in vertebral column minimally invasive percutaneous cervical arc root screw surgery systems due to the pedicle screw using the utility model
Effect reduces the upper nail number of instruments in surgical procedure, saves surgery cost, while also reducing the risk in operation；
3, due to the pedicle screw using the utility model, the wind of agent's stock kind shortage of goods can be effectively reduced
Danger, to effectively reduce inventory risk for agent；
4, it due to the pedicle screw using the utility model, provides and follows closely mode in multi-angle, hand can be effectively reduced
It is upper during art to follow closely difficulty, to save operating time；
5, it is avoided in vertebral column minimally invasive percutaneous cervical arc root screw surgery systems due to the soft channel using the utility model
Upper nail pipe is during surgery due to positional shift and rotation caused by maloperation, to reduce the unexpected feelings occurred in operation
Condition saves operating time, reduces the risk in operation.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram that the universal unidirectional unification pedicle of vertebral arch screw of the utility model vertebral column minimally invasive nails on nail system；
Fig. 2 is the cross-sectional view that the universal unidirectional unification pedicle of vertebral arch screw of the utility model vertebral column minimally invasive nails on nail system；
Fig. 3 is the partial enlargement signal that the universal unidirectional unification pedicle of vertebral arch screw of the utility model vertebral column minimally invasive nails on nail system
Figure；
Fig. 4 is that the universal unidirectional unification pedicle of vertebral arch screw of the utility model vertebral column minimally invasive nails on nail system removal locking plug screw, connects
Exploded view after taking over the baton；
Fig. 5 is the structural schematic diagram of the intermediate of the utility model and a preferred embodiment of interconnecting piece cooperation；
Fig. 6 is the structural schematic diagram that intermediate upper end increases after retaining ring in Fig. 5；
Fig. 7 is the structural schematic diagram of the intermediate of the utility model and the another preferred embodiment of interconnecting piece cooperation；
Fig. 8 is when the universal unidirectional unification pedicle of vertebral arch screw of the utility model vertebral column minimally invasive nails on nail system as unidirectional use
Structural schematic diagram；
Fig. 9 is when the universal unidirectional unification pedicle of vertebral arch screw of the utility model vertebral column minimally invasive nails on nail system as universal use
Structural schematic diagram；
In figure: 1. ball heads, 2. pedicle of vertebral arch screw nail seats, 3. locking plug screws, 4. pitmans, 5. first threaded portions, 6. second
Threaded portion, 7. interconnecting pieces, 8. adjusting nuts, 9. intermediates, 10. retaining rings.
Specific embodiment:
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model
It can be easier to be understood by those skilled in the art with feature, to make apparent specific boundary to the protection scope of the utility model
It is fixed.Direction term that the utility model is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom" etc.,
It is only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the utility model, rather than to
Limit the utility model.
As shown in Figs 1-4, a kind of universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system, including pedicle screw
Seat 2 and the button being installed in pedicle of vertebral arch screw nail seat 2,
The button includes bar portion and the ball head 1 set on bar portion top, and the ball head 1 has opening in top
Hemispherical, 1 inner wall of ball head have spherical, and the spherical center, which has, to be coaxially disposed with bar portion and prolong upwards
The interconnecting piece 7 stretched, offers external screw thread on interconnecting piece 7, and the bar portion includes close to the first threaded portion 5 of ball head 1 and separate
Second threaded portion 6 of ball head 1, the screw pitch of the screw pitch of first threaded portion 5 less than the second threaded portion 6；
2 bottom of pedicle of vertebral arch screw nail seat has the spherical outside surface to match with the spherical of ball head 1, the ectosphere
Face it is pluggable enter the spherical in (i.e. spherical can by spherical outside surface it is fully wrapped around including, and face and face contact
When gapless), and can realize relative rolling, 2 bottom interior wall of pedicle of vertebral arch screw nail seat has Internal Spherical Surface, the Internal Spherical Surface inner sleeve
Equipped with adjusting nut 8, adjusting nut 8 is generally also spherical in matching with Internal Spherical Surface, 8 outer wall of adjusting nut and Internal Spherical Surface mistake
Be full of cooperation (i.e. Internal Spherical Surface can by adjusting nut 8 it is fully wrapped around including, and face and gapless when face contact), in adjusting nut 8
The interconnecting piece 7 of wall and ball head 1 is connected through a screw thread, and the spherical outside surface of pedicle of vertebral arch screw nail seat 2 can be driven along ball by adjusting nut 8
The spherical on head 1 is mobile；
2 inner cavity of pedicle of vertebral arch screw nail seat is additionally provided with locking assembly, and the locking assembly includes locking plug screw 3, connection
Stick 4 and intermediate 9, the lid of intermediate 9 are located at 7 top of the adjusting nut 8 and/or interconnecting piece, and the setting of pitman 4 exists
9 top of intermediate, 4 both ends of pitman extend through pedicle screw, the center of the cambered surface and intermediate 9 of 4 bottom end of pitman
Through-hole matches, and the setting of locking plug screw 3 locks plug screw 3 and 2 thread in inner cavity of pedicle of vertebral arch screw nail seat connects on 4 top of pitman
It connects, pitman 4 can be made to compress intermediate 9, the compressible adjusting nut 8 of intermediate 9, to make vertebra by screwing locking plug screw 3
Pedicle screw seat 2 and button are relatively fixed.
As described in Figure 3, the spherical inner wall offers several card slots, the card slot can increase spherical with
The coefficient of friction of the spherical outside surface of 2 bottom of pedicle of vertebral arch screw nail seat, the Internal Spherical Surface inner wall offer card slot, which can increase vertebra
The Internal Spherical Surface of pedicle screw seat 2 and the coefficient of friction for adjusting 8 outer wall of screw, to prevent from occurring loosening in use process or beating
It is sliding.
Intermediate 9 as shown in Figure 5, the intermediate 9 include platform part and lug boss, and 7 top of interconnecting piece opens up
Have an inner hole, the lug boss of intermediate 9 it is pluggable enter the inner hole in, the platform part and adjusting nut and/or interconnecting piece of intermediate 9
7 top end surface leans, so as to compress adjusting nut and/or interconnecting piece 7.
As shown in fig. 6, different from Fig. 5 be, 9 upper surface of intermediate is covered with retaining ring 10, and 9 top of intermediate opens up
There is card slot, the retaining ring 10 is set in the card slot.
Another intermediate 9 ' as shown in Figure 7, the 9 ' center of intermediate offer through-hole, the 7 ' top of interconnecting piece
Be provided with lug boss, the lug boss it is pluggable enter intermediate 9 ' through-hole in, the end face of intermediate 9 ' and adjusting nut and/or
The top end surface of interconnecting piece 7 ' leans.
As shown in figure 8, unidirectional in use, successively adjusting nut 8 and intermediate 9 are fitted into pedicle of vertebral arch screw nail seat 2, so
Afterwards with dedicated adjusting nut device by 8 backspin of adjusting nut until screw thread corresponding with the interconnecting piece 7 on ball head 1 it is stuck, due to
The two subsequent corrosion is the same, therefore adjusting nut 8 can come into full contact with pedicle of vertebral arch screw nail seat 2；Utilize adjusting nut 8 and pedicle of vertebral arch screw
Nail seat 2 matches the frictional force at position and pressure ensure that pedicle of vertebral arch screw nail seat 2 is immovable and rotates, so as to form tradition
The unidirectional state of pedicle screw；Finally locked with instrument by plug screw 3 is locked.
As shown in figure 9, as universal in use, adjusting nut 8 and intermediate 9 are successively packed into pedicle of vertebral arch screw nail seat 2
In, then with dedicated adjusting nut device by 8 backspin of adjusting nut, until feel cannot continue backspin, then it is reversed slightly on
Rotation；Since pedicle of vertebral arch screw nail seat 2 does not receive the external force of the application of adjusting nut 8, therefore it can do and freely swing around 1 centre of sphere of ball head,
To form the universal state of conventional pedicle screws；Finally locked with instrument by plug screw is locked.
It is as shown in table 1 to obtain data through measurement for each contact surface of the utility model as shown in Fig. 8, Fig. 9:
Table 1
It follows that the contact area of each stress surface of the utility model is significantly greater than in the prior art (documents)
Contact area, therefore, the utility model have stronger fastness and anti-loose ability.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.
Claims (7)
1. a kind of universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system, including pedicle of vertebral arch screw nail seat and it is installed on vertebral arch
Button in root screw base, it is characterised in that:
The button includes bar portion and the ball head set on bar portion top, and the ball head inner wall has spherical, institute
Stating spherical center has the interconnecting piece for being coaxially disposed and upwardly extending with bar portion；
Pedicle of vertebral arch screw nail seat bottom has the spherical outside surface to match with the spherical of ball head, and the spherical outside surface can be inserted
It accesses in the spherical, the pedicle of vertebral arch screw nail seat bottom interior wall has Internal Spherical Surface, is arranged with tune in the Internal Spherical Surface
Nut is saved, the adjusting nut outer wall and Internal Spherical Surface are interference fitted, and the interconnecting piece of adjusting nut inner wall and ball head passes through screw thread
Connection, can drive the spherical outside surface of pedicle of vertebral arch screw nail seat to move along the spherical of ball head by adjusting nut；
Pedicle of vertebral arch screw nail seat inner cavity is additionally provided with locking assembly, the locking assembly include locking plug screw, pitman and in
Mesosome, the intermediate lid are located at the adjusting nut and/or interconnecting piece top, and the pitman is arranged on intermediate top,
Pitman both ends extend through pedicle screw, and the locking plug screw setting locks plug screw and pedicle of vertebral arch screw on pitman top
Thread in inner cavity connection is followed closely, locking plug screw can lock intermediate by pitman.
2. the universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive according to claim 1 nails on nail system, it is characterised in that: institute
It states spherical inner wall and offers several card slots.
3. the universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive according to claim 2 nails on nail system, it is characterised in that: institute
It states Internal Spherical Surface inner wall and offers card slot.
4. the universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive according to claim 1 or 2 or 3 nails on nail system, feature
Be: the intermediate includes platform part and lug boss, and the interconnecting piece top offers inner hole, and the lug boss of intermediate can be inserted
It accesses in the inner hole, the platform part of intermediate and the top end surface of adjusting nut and/or interconnecting piece lean.
5. the universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive according to claim 4 nails on nail system, it is characterised in that: institute
It states intermediate upper surface and is covered with retaining ring.
6. the universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive according to claim 1 or 2 or 3 nails on nail system, feature
Be: the intermediate center offers through-hole, and the interconnecting piece top is provided with lug boss, the lug boss it is pluggable enter in
In the through-hole of mesosome, the end face of intermediate and the top end surface of adjusting nut and/or interconnecting piece lean.
7. the universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive according to claim 1 or 2 or 3 nails on nail system, feature
Be: the bar portion includes the first threaded portion close to ball head and the second threaded portion far from ball head, first screw thread
Screw pitch of the screw pitch in portion less than the second threaded portion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820914893.4U CN208958308U (en) | 2018-06-13 | 2018-06-13 | The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system |
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| CN201820914893.4U CN208958308U (en) | 2018-06-13 | 2018-06-13 | The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108670399A (en) * | 2018-06-13 | 2018-10-19 | 迪恩医疗科技有限公司 | The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108670399A (en) * | 2018-06-13 | 2018-10-19 | 迪恩医疗科技有限公司 | The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system |
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