CN208228989U

CN208228989U - A kind of vertebral column internal fixation nail stick system

Info

Publication number: CN208228989U
Application number: CN201721055618.3U
Authority: CN
Inventors: 秦鑫; 徐建平
Original assignee: JIANGSU JINLU GROUP MEDICAL DEVICE Co Ltd
Current assignee: JIANGSU JINLU GROUP MEDICAL DEVICE Co Ltd
Priority date: 2017-08-22
Filing date: 2017-08-22
Publication date: 2018-12-14
Anticipated expiration: 2027-08-22

Abstract

The utility model discloses a kind of vertebral column internal fixation nail stick systems, including including barred body, horizontal connected device, fixing screws, Universal screw nail, fixing screws includes fixed ailhead and fixing screws ontology, the cooperation bayonet packet mating groove of fixed ailhead is provided with arc groove along middle part in the mating groove；Screw thread on fixing screws ontology includes lower thread segment and upper thread segment, and the screw pitch of lower thread segment is greater than the screw pitch of upper thread segment；Universal screw nail includes movable ailhead, Universal screw nail ontology is movably installed in the mating spherical surfaces hole of movable ailhead, the screw thread of Universal screw nail ontology is identical as the helicitic texture of fixing screws ontology, screw wedge is installed on ball head, the screw wedge lower end is arranged to spherical surface restraint slot, the upper end of screw wedge is arranged to support slot, and locking screw section internal screw thread is equipped with locking nut.The internal fixation nail bar system is not only able to be firmly fixed, and whole system is avoided to loosen, and facilitates being screwed into for screw, saves the time of operation.

Description

A kind of vertebral column internal fixation nail stick system

Technical field

The utility model relates to a kind of internal fixation nail bar systems, the interior fixation for backbone.

Background technique

It, can since tumor of spine, tuberculosis and serious fracture often cause vertebral bodies destroyed in the treatment of human spine's disease Spinal nerve can be caused to damage and have to implement Vertebrae resection, the backbone after vertebral resection need to rebuild its stability, manually The appearance of vertebral body prosthesis art provides a kind of ideal method to treat such disease.And it is clinically that spine fixator, which is, Be commonly used for treat, centrum landing, spinal canal stenosis, backbone degenerative disorders utensil.So current spine fixator It include two barred bodies, horizontal connected device and screw, screw uses Universal screw nail or fixing screws according to the actual situation, and barred body is installed on It is compressed on the top of screw and by nut, horizontal connected device is installed to form rock-steady structure between two barred bodies, it is so current This structure still has the disadvantage in that the thread angle of 1, current nut is all identical, and thread angle is unreasonable, by The reaction force of barred body can be such that nut deviates from, so that barred body be caused to loosen, it is unstable that barred body loosening will result in entire fixator, Backbone may be made to misplace, aggravate conditions of patients；2. current screw is all the screw of single thread, it is slow to be screwed into speed, right Cortex bone is different with the holding power of cancellous bone, bad adaptability；3. cooperation bayonet is provided with outside the ailhead of current fixator, Tool and ailhead is facilitated to cooperate, so current cooperation buckle is only provided with circular groove, this structure in the outside of ailhead It can not make tool and ailhead accurate fit, need the relative position for repeatedly adjusting the two to be just able to cooperate, operating time extends.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of vertebral column internal fixation nail stick system, the internal fixation nails Bar system is not only able to be firmly fixed, and whole system is avoided to loosen, and facilitates being screwed into for screw, save operation when Between.

In order to solve the above technical problems, the technical solution of the utility model is: a kind of vertebral column internal fixation nail stick system, including Two barred bodies in left and right, are provided with horizontal connected device between two barred bodies, are respectively arranged with multiple screws on every barred body, every barred body Both ends are respectively mounted the identical fixing screws of structure, and there are two Universal screw nail, the quantity of horizontal connected device is two sets for the middle part installation of barred body And it is located between Universal screw nail and fixing screws；The fixing screws include the fixation ailhead for including U-shaped, fixed ailhead Bottom is provided with the fixing screws ontology being linked together with fixed ailhead, and the fixed ailhead includes the first U-lag, and described first The slot bottom of U-lag is semicircle, and locking screw pit, the locking screw pit internal screw thread peace is arranged in the cell wall of first U-lag Equipped with locking nut, barred body is pressed on the slot bottom of the first U-lag, the locking nut and locking screw pit by the locking nut Each thread to being adapted to and being trapezoidal thread, the lower tooth of the trapezoidal thread of the locking nut tilts upwardly and and fixing glue The angle of the center line of head is 60 °, and the upper tooth of trapezoidal thread tilts upwardly and is 85 ° with the angle of the center line, described Two lateral surfaces of fixed ailhead are that arc surface is provided with the cooperation bayonet for facilitating tool to cooperate, and the cooperation bayonet includes one The level of rectangle runs through the mating groove of arc surface, and middle part is provided with arc groove in the mating groove；The fixed spiral shell Screw thread on nail ontology includes lower thread segment and upper thread segment, and the screw pitch of the lower thread segment is greater than the screw pitch of upper thread segment；Institute State the movable ailhead that Universal screw nail includes U-shaped, the activity ailhead includes the second U-lag, the slot bottom of the second U-lag be arranged to The semicircle of barred body shape adaptation, the through hole of the activity ailhead being provided centrally with axially through movable ailhead, the perforation The lower part in hole is provided with mating spherical surfaces hole, and the upper section of the through hole is arranged to locking screw section, the locking screw section it is interior Diameter is identical as the aperture in mating spherical surfaces hole；The screwed tooth structure phase of the thread of locking screw section and the locking screw pit on fixed ailhead Together；The outside of the activity ailhead is provided with cooperation bayonet identical with fixed ailhead；Activity installation in the mating spherical surfaces hole There is Universal screw nail ontology, the upper end of the Universal screw nail ontology is provided with the ball head with the cooperation of mating spherical surfaces hole, the bulb Interior hexagonal groove is provided in the middle part of portion, the screw thread of the Universal screw nail ontology is identical as the helicitic texture of fixing screws ontology, Screw wedge is installed, which is arranged to the spherical surface restraint slot cooperated with ball head, described on the ball head The upper end of screw wedge is arranged to the support slot being adapted to the slot bottom of the second U-lag, and the locking screw section internal screw thread is equipped with Locking nut.

As a preferred solution, the screw thread of the fixing screws ontology include the first screw thread and the second screw thread, first The screw pitch of screw thread and the second screw thread is equal, and the first thread helix is arranged on entire screw body, second screw thread and the One threading dislocations spaced set, and the length of the second screw thread is shorter than the length of the first screw thread, the first screw thread and the second screw thread Upper section constitutes thread segment, and the lower section of the first screw thread constitutes lower thread segment.

As a preferred solution, the head of the lower thread segment is tapered.

As a preferred solution, it is provided with the groove that fractures on the outside of the fixed ailhead, which will fix Ailhead is divided into the fixed ailhead of upper section and the fixed ailhead of lower section, and the fixed ailhead of the upper section and the fixed ailhead of lower section are provided with institute State cooperation bayonet；It is also equipped with the groove that fractures on the outside of the activity ailhead, which is divided into upper section for movable ailhead It is provided with cooperation bayonet on the outside of movable ailhead and lower section activity ailhead, the upper section activity ailhead and lower section activity ailhead, The locking screw section from top to bottom extends to lower section activity ailhead and tangent with mating spherical surfaces hole.

As a preferred solution, the thread depth of the lower thread segment on the fixing screws ontology is greater than upper thread segment Thread depth.

As a preferred solution, the two sides of the screw wedge are provided with clamping notch.

After above-mentioned technical proposal, the effect of the utility model is: 1. nail-stick systems include fixing screws and ten thousand To screw, the both ends of barred body make the fixation of entire barred body stronger, system is more stable, is not easy in this way by fixing screws It loosens, and carries out selection installation Universal screw nail in the range of barred body, implant angle adjustable in this way adapts to different symptoms；2. The lower tooth of the trapezoidal thread of the locking nut, which faces upward, to be tilted and is 60 ° with the angle of the center line of fixed ailhead, trapezoidal thread Upper tooth upwardly tilt and be 85 ° with the angle of the center line, in this way, the locking stud being mounted in locking screw pit by To barred body reaction force when can reduce outside tension, in this way, the deformation of the first U-type groove is small, lock stronger；3. described solid Determining the screw thread on screw body includes lower thread segment and upper thread segment, and the screw pitch of the lower thread segment is greater than the spiral shell of upper thread segment Away from increasing adaptability in this way, increase extruding force and holding power to cortex bone, while being provided with to cancellous bone and cortex bone Locking holding effect；4. the cooperation bayonet includes that the level of a rectangle runs through the mating groove of arc surface, the cooperation is recessed Middle part is provided with arc groove on slot, in this way, fixed ailhead and movable ailhead can be caught in during installation from horizontal two sides It positions, is operated so more quick and precisely into mating groove, then through arc groove.

Again since the screw thread of the fixing screws ontology includes the first screw thread and the second screw thread, the first screw thread and the second screw thread Screw pitch be equal, the first thread helix be arranged on entire screw body, between second screw thread and the first threading dislocations etc. Away from setting, and the length of the second screw thread is shorter than the length of the first screw thread, and the upper section of the first screw thread and the second screw thread constitutes spiral shell Line section, the lower section of the first screw thread constitute lower thread segment, are screwed into speed faster, pressure effect is more preferable.

Again since the thread depth of the lower thread segment on the fixing screws ontology is greater than the thread depth of upper thread segment, this Sample can further improve the holding power of cancellous bone.

Again due to being provided with the groove that fractures on the outside of the fixed ailhead, which is divided into upper section for fixed ailhead Fixed ailhead and the fixed ailhead of lower section, the fixed ailhead of the upper section and the fixed ailhead of lower section are provided with the cooperation bayonet；Institute It states and is also equipped with the groove that fractures on the outside of movable ailhead, which is divided into upper section activity ailhead and lower section for movable ailhead Cooperation bayonet, the locking screw section are provided on the outside of movable ailhead, the upper section activity ailhead and lower section activity ailhead Lower section activity ailhead and tangent with mating spherical surfaces hole is from top to bottom extended to, fixed ailhead and movable ailhead length can be longer, The installation of more convenient barred body is suitble to different surgery situations.

Again since the two sides of the screw wedge are provided with clamping notch, which not only can be convenient screw wedge Be put into, and will clamping notch be used as benchmark, make itself and Universal screw nail ontology accurate fit.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the perspective view of the utility model embodiment；

Fig. 2 is the main view of the fixing screws of the utility model embodiment；

Fig. 3 is the cross-sectional view of the fixing screws of the utility model embodiment；

Fig. 4 is the cross-sectional view of Universal screw nail；

Fig. 5 is the perspective view of Universal screw nail；

Fig. 6 is the cross-sectional view of movable ailhead；

Fig. 7 is the end view of screw wedge；

Fig. 8 is the cross-sectional view of screw wedge；

Fig. 9 is the cross-sectional view of locking nut；

Figure 10 is the enlarged diagram of the thread of locking nut；

In attached drawing: 1. barred bodies；2. fixing screws；21. fixed ailhead；22. fixing screws sheet；23. mating groove；24. folding Disconnected groove；25. arc groove；26. the first U-lag；27. locking screw pit；Thread segment on 28.；29. lower thread segment；3. universal Screw；31. movable ailhead；32. Universal screw nail ontology；321. ball head；Hexagonal groove in 322.；323. first screw threads；324. Second screw thread；33. mating groove；34. fracture groove；35. arc groove；36. the second U-lag；37. through hole；38. spherical surface is matched Close hole；4. horizontal even block；5. tranverse connecting rod；6. screw wedge；61. spherical surface restraint slot；62. support slot；63. clamping notch；7. locking Nut.

Specific embodiment

The utility model is described in further detail below by specific embodiment.

As shown in Figures 1 to 10, a kind of vertebral column internal fixation nail stick system, including two barred bodies 1 in left and right, two barred bodies 1 it Between be provided with horizontal connected device, multiple screws are respectively arranged on every barred body 1, it is identical that the both ends of every barred body 1 are respectively mounted structure Fixing screws 2, there are two Universal screw nail 3, the quantity of horizontal connected device is two sets and is located at Universal screw nail for the middle part installation of barred body 1 Between 3 and fixing screws 2；Horizontal connected device includes the horizontal even block 4 being clamped on each barred body 1, is inserted into tranverse connecting rod 5 between horizontal even block 4 And pass through nut check.

The fixing screws 2 include the fixation ailhead 21 for including U-shaped, and the bottom of fixed ailhead 21 is provided with and fixed ailhead The 21 fixing screws ontologies 22 being linked together, the fixed ailhead 21 include the first U-lag 26, the slot of first U-lag 26 Bottom is semicircle, and locking screw pit 27 is arranged in the cell wall of first U-lag 26, and 27 internal screw thread of locking screw pit is equipped with Barred body 1 is pressed on the slot bottom of the first U-lag 26, the locking nut 7 and locking screw by locking nut 7, the locking nut 7 Each thread in hole 27 to being adapted to and be trapezoidal thread, the lower tooth of the trapezoidal thread of the locking nut 7 tilt upwardly and with The angle of the center line of fixed ailhead 21 is 60 °, and the upper tooth of trapezoidal thread tilts upwardly and is with the angle of the center line 85 °, in this way, reducing the outside expansionary force of 7 pairs of locking nut fixed ailheads 21, avoid the deformation of the first U-lag 26.Equally, Movable ailhead 31 is similarly had that effect.

Two lateral surfaces of the fixed ailhead 21 are that arc surface is provided with the cooperation bayonet for facilitating tool to cooperate, described to match Closing bayonet includes that the level of a rectangle runs through the mating groove 23 of arc surface, and middle part is provided with circle in the mating groove 23 Arc fluting 25；Tool does not need from top to bottom to enter, in mating groove 23, it is only necessary to enter in arc groove from horizontal two sides , and location fit is completed by arc groove 25, avoid fixed ailhead 21 from loosening；Spiral shell on the fixing screws ontology 22 Line includes lower thread segment 29 and upper thread segment 28, and the screw pitch of the lower thread segment 29 is greater than the screw pitch of upper thread segment 28；It is described solid The screw thread for determining screw body 22 includes the first screw thread 323 and the second screw thread 324, the screw pitch of the first screw thread 323 and the second screw thread 324 It is equal, 323 spiral of the first screw thread is arranged on entire screw body, second screw thread 324 and the dislocation of the first screw thread 323 etc. Spacing setting, and the length of the second screw thread 324 is shorter than the length of the first screw thread 323, the first screw thread 323 and the second screw thread 324 Upper section constitutes thread segment 28, and the lower section of the first screw thread 323 constitutes lower thread segment 29.On the fixing screws ontology 22 The thread depth of lower thread segment 29 is greater than the thread depth of upper thread segment 28.The head of the lower thread segment 29 is tapered.

The outside of the fixed ailhead 21 is provided with the groove 24 that fractures, which is divided into fixed ailhead 21 The fixed ailhead 21 of section and the fixed ailhead 21 of lower section, the fixed ailhead 21 of the upper section and the fixed ailhead 21 of lower section are provided with described match Close bayonet；The outside of the activity ailhead 31 is also equipped with the groove 34 that fractures, which is divided into movable ailhead 31 The outside of upper section activity ailhead 31 and lower section activity ailhead 31, the upper section activity ailhead 31 and lower section activity ailhead 31 is respectively provided with There is a cooperation bayonet, the locking screw section from top to bottom extends to lower section activity ailhead 31 and tangent with mating spherical surfaces hole 38.

The Universal screw nail 3 includes the movable ailhead 31 of U-shaped, and the activity ailhead 31 includes the second U-lag 36, the 2nd U The slot bottom of shape slot 36 is arranged to the semicircle with 1 shape adaptation of barred body, which is provided centrally with axially through work The through hole 37 of dynamic ailhead 31, the lower part of the through hole 37 are provided with mating spherical surfaces hole 38, and the upper section of the through hole 37 is set It is set to locking screw section, the internal diameter of the locking screw section is identical as the aperture in mating spherical surfaces hole 38；The thread of locking screw section It is identical as the screwed tooth structure of locking screw pit 27 on fixed ailhead 21；The outside of the activity ailhead 31 is provided with and fixing glue First 21 identical cooperation bayonet；Equally, which includes the mating groove 33 and arc groove 35 of rectangle.

Universal screw nail ontology 32 is movably installed in the mating spherical surfaces hole 38, the upper end of the Universal screw nail ontology 32 is set It is equipped with the ball head 321 cooperated with mating spherical surfaces hole 38, the middle part of the ball head 321 is provided with interior hexagonal groove 322, described The screw thread of Universal screw nail ontology 32 is identical as the helicitic texture of fixing screws ontology 22, is equipped with screw on the ball head 321 Wedge 6,6 lower end of screw wedge are arranged to the spherical surface restraint slot 61 cooperated with ball head 321, the two sides of the screw wedge 6 It is provided with clamping notch 63.The upper end of the screw wedge 6 is arranged to the support slot 62 being adapted to the slot bottom of the second U-lag 36, The locking screw section internal screw thread is equipped with locking nut 7.

Embodiment described above is only the description to the preferred embodiment of the present invention, not as the limit to the scope of the invention It is fixed, on the basis of not departing from design spirit of the present invention, to various modifications and transformation that technical solution of the present invention is made, it should all fall Enter in the protection scope that claims of the present invention determines.

Claims

1. a kind of vertebral column internal fixation nail stick system, including two barred bodies are controlled, horizontal connected device, every stick are provided between two barred bodies Multiple screws are respectively arranged on body, it is characterised in that: the both ends of every barred body are respectively mounted the identical fixing screws of structure, barred body Middle part installation there are two Universal screw nail, the quantity of horizontal connected device is two sets and is located between Universal screw nail and fixing screws； The fixing screws include the fixation ailhead of U-shaped, and the bottom of fixed ailhead is provided with the fixation spiral shell being linked together with fixed ailhead Ontology is followed closely, the fixed ailhead includes the first U-lag, and the slot bottom of first U-lag is semicircle, first U-lag Locking screw pit is arranged in cell wall, and the locking screw pit internal screw thread is equipped with locking nut, and the locking nut compresses barred body In the slot bottom of the first U-lag, each thread of the locking nut and locking screw pit is to being adapted to and be trapezoidal thread, the lock The lower tooth of the trapezoidal thread of tight nut, which faces upward, to be tilted and is 60 ° with the angle of the center line of fixed ailhead, trapezoidal thread it is upper Facing tilts upwards and is 85 ° with the angle of the center line, and two lateral surfaces of the fixed ailhead are provided with for arc surface The cooperation bayonet for facilitating tool to cooperate, the cooperation bayonet include that the level of a rectangle runs through the mating groove of arc surface, should Middle part is provided with arc groove in mating groove；Screw thread on the fixing screws ontology includes lower thread segment and upper screw thread Section, the screw pitch of the lower thread segment are greater than the screw pitch of upper thread segment；The Universal screw nail includes the movable ailhead of U-shaped, the work Dynamic ailhead includes the second U-lag, and the slot bottom of the second U-lag is arranged to the semicircle with barred body shape adaptation, the activity ailhead It is provided centrally with the through hole axially through movable ailhead, the lower part of the through hole is provided with mating spherical surfaces hole, the perforation The upper section in hole is arranged to locking screw section, and the internal diameter of the locking screw section is identical as the aperture in mating spherical surfaces hole；Locking screw The thread of section is identical as the screwed tooth structure of locking screw pit on fixed ailhead；The outside of the activity ailhead is provided with and fixes The identical cooperation bayonet of ailhead；Universal screw nail ontology is movably installed in the mating spherical surfaces hole, the Universal screw nail ontology Upper end is provided with the ball head with the cooperation of mating spherical surfaces hole, is provided with interior hexagonal groove in the middle part of the ball head, described universal The screw thread of screw body is identical as the helicitic texture of fixing screws ontology, and screw wedge is equipped on the ball head, the screw Wedge lower end is arranged to the spherical surface restraint slot cooperated with ball head, and the upper end of the screw wedge is arranged to and the second U-lag The support slot of slot bottom adaptation, the locking screw section internal screw thread are equipped with locking nut.

2. a kind of vertebral column internal fixation nail stick system as described in claim 1, it is characterised in that: the spiral shell of the fixing screws ontology Line includes the first screw thread and the second screw thread, and the screw pitch of the first screw thread and the second screw thread is equal, and the first thread helix is arranged whole On a screw body, second screw thread and the first threading dislocations spaced set, and the length of the second screw thread is than the first screw thread Length it is short, the upper section of the first screw thread and the second screw thread constitutes thread segment, and the lower section of the first screw thread constitutes lower thread segment.

3. a kind of vertebral column internal fixation nail stick system as claimed in claim 2, it is characterised in that: the head of the lower thread segment at Taper.

4. a kind of vertebral column internal fixation nail stick system as claimed in claim 3, it is characterised in that: set on the outside of the fixed ailhead It is equipped with the groove that fractures, which is divided into the fixed ailhead of upper section and the fixed ailhead of lower section for fixed ailhead, and the upper section is solid Determine ailhead and the fixed ailhead of lower section is provided with the cooperation bayonet；It is also equipped with the groove that fractures on the outside of the activity ailhead, Movable ailhead is divided into upper section activity ailhead and lower section activity ailhead by the groove that fractures, and the upper section activity ailhead and lower section are living It is provided with cooperation bayonet on the outside of dynamic ailhead, the locking screw section from top to bottom extends to lower section activity ailhead and and spherical surface Matching hole is tangent.

5. a kind of vertebral column internal fixation nail stick system as claimed in claim 4, it is characterised in that: on the fixing screws ontology The thread depth of lower thread segment is greater than the thread depth of upper thread segment.

6. a kind of vertebral column internal fixation nail stick system as claimed in claim 5, it is characterised in that: the two sides of the screw wedge are set It is equipped with clamping notch.