CN204169917U - The special pedicle nail of PLIF - Google Patents
The special pedicle nail of PLIF Download PDFInfo
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- CN204169917U CN204169917U CN201420507190.1U CN201420507190U CN204169917U CN 204169917 U CN204169917 U CN 204169917U CN 201420507190 U CN201420507190 U CN 201420507190U CN 204169917 U CN204169917 U CN 204169917U
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- nail
- screw
- screw base
- housing pin
- snap ring
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Abstract
This utility model relates to the special pedicle nail of a kind of PLIF, belongs to technical field of medical instruments, comprises Universal screw nail, screw base, locking snap ring, ring washer, pressure bar device, housing pin, housing pin, pressure bar device, ring washer, locking snap ring is from top to bottom arranged in the chamber of screw base successively, the head movement holding of Universal screw nail is in locking snap ring, the screw rod of Universal screw nail extends to the below of screw base, the upper surface of ring washer offers two symmetrically arranged arcuate grooves, the lower end of ring washer is between screw base inwall and locking snap ring outer wall, the movable upper end holding of pressure bar device is on housing pin, the lower surface of pressure bar device offers an arc-shaped slot, and the notch of the notch of arc-shaped slot and arcuate groove is oppositely arranged, housing pin and screw base are threaded connection.The special pedicle nail of this utility model PLIF, the operation process time is short, simple to operate, little to patient trauma area.
Description
Technical field
This utility model relates to the special pedicle nail of a kind of PLIF, belongs to technical field of medical instruments.
Background technology
One of initial object of lumbar surgery is to remove nerve compression, but excises more rear pillar and adnexa for this reason and cause the instability of spinal column, also there will be Lumbar spine in addition when damage appears in spinal column, thus the method for birth bone-graft fusion.Lumbar Fusion operation Watkins is reported the earliest to the method for postero-lateral fusion, now become the standard art formula of Lumbar Fusion operation.
Lumbar Fusion operation mainly comprises Posterolateral fusion (posterolateral lumbar fusion, and interbody fusion (interbody fusion) PLF), the latter can be divided into again way of escape interbody fusion (posterior lumbar interbody fusion, PLIF), anterior intervertebral fusion art (anterior lumbar interbody fusion, ALIF), intervertebral spinal fusion interbody fusion (transforaminal lumbar fusion, TLIF) etc.The method also often adopting intervertebral fusion to be combined with postero-lateral fusion clinically, is called 360 ° of fusions (circumferential fusion, CF).
The internal fixation system mainly pedicle nail bar system composition that lumbar vertebra posterior-path fusion operation is conventional, it fully can reach the fixing requirement of spinal column three post, effectively plays at once fixing effect, for intervertebral fusion provides strong fixing.But in Clinical practice process, found some problems, as inserting due to decompression pedicle nail, when Lumbar Vertebral Canal is reduced pressure, the operating difficulties by the impact of nail tail; Owing to putting the difference of nail position, cause the inconvenience of mounting bar; Because nail tail shape causes the problems such as incisura is higher.For these problems, we solicit the spinal column expert of domestic Duo Jia hospital, and in conjunction with external advanced technology, develop a kind of special pedicle nail of PLIF of brand new, this case produces thus.
Utility model content
The purpose of this utility model be to provide a kind of operation process time short, simple to operate, to the special pedicle nail of the PLIF that patient trauma area is little.
For achieving the above object, the technical scheme that this utility model adopts is:
The special pedicle nail of a kind of PLIF, comprises Universal screw nail, screw base, locking snap ring, ring washer, pressure bar device, housing pin, housing pin, pressure bar device, ring washer, locking snap ring is from top to bottom arranged in the chamber of screw base successively, the head movement holding of Universal screw nail is in locking snap ring, the screw rod of Universal screw nail extends to the below of screw base, the upper surface of ring washer offers two symmetrically arranged arcuate grooves, the lower surface of ring washer is between screw base inwall and locking snap ring outer wall, the movable upper end holding of pressure bar device is on housing pin, the lower end of pressure bar device offers an arc-shaped slot, and the notch of the notch of arc-shaped slot and arcuate groove is oppositely arranged, housing pin and screw base are threaded connection.
The centre of described housing pin offers up big and down small ladder hole, ladder hole comprises the non-circular hole being positioned at top and the circular port being positioned at below, the intersection forming station terrace one of non-circular hole and circular port, the projection of pressure bar device upper end extends upwardly in non-circular hole through circular port, and projection upper end-face edge activity holding is on step surface one.
Described non-circular hole is any one in square hole or star-shaped aperture or trapezoidal hole.
Be provided with sealing cap between described screw base and housing pin, sealing cap outer wall and screw base inwall are threaded connection, and sealing cap inwall and housing pin outer wall are threaded connection.
The lower end of described locking snap ring is supported on the step surface two of inside projection bottom screw base.
Adopt Demountable between Universal screw nail in the special pedicle nail of this utility model PLIF and screw base, in operation process, first the screw rod of Universal screw nail is screwed into pedicle of vertebral arch, and adjusting screw(rod) is all after same plane, mounting screw seat.Owing to being first insert Universal screw nail, not mounting screw seat, so can avoid the problem being affected the spinal canal decompression operating difficulties that surgical field of view causes by screw base; Compare in upper nail process and implant common pedicle screw, the operation process time is shorter, and operation is simpler, and less to patient trauma area, more can reach Wicresoft's effect.
In common pedicle nail structure, its screw and screw base are connected as a single entity, and screw base in the special pedicle nail of this utility model PLIF and Universal screw nail can assembly and disassembly in operation process, screw base and and Universal screw nail between devise locking snap ring with lock function, operation install time only need the small power that tightens and displacement just can Universal screw nail head snap in installed lock snap ring screw base on, then Orthopedic rod is inserted, pressure bar device is compressed again by housing pin, locking snap ring surrounds Universal screw nail head, it is made to couple together reliably, reach the effect of easing stress of expection simultaneously.Simultaneously, after this utility model fixes Universal screw nail, before not locking Orthopedic rod, screw base has 25 degree of angle of taper in any direction, thus without the need to carrying out complicated bending to Orthopedic rod, the status requirement of opposed nail is not high, still can accept when the position of putting nail is bad, reduces the operating time in operation process.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of Universal screw nail in this utility model;
Fig. 3 is the structural representation of screw base in this utility model;
Fig. 4 is the structural representation locking snap ring in this utility model;
Fig. 5 be Fig. 4 look up structural representation;
Fig. 6 is the structural representation of ring washer in this utility model;
Fig. 7 is the perspective view of Fig. 6;
Fig. 8 be in this utility model pressure bar device and housing pin assembling after structural representation;
Fig. 9 is the structural representation of housing pin in this utility model;
Figure 10 is the plan structure schematic diagram of Fig. 9;
Figure 11 is the structural representation of sealing cap in this utility model;
Figure 12 is the swingable schematic diagram of the Universal screw nail in this utility model;
Figure 13 is that this utility model and Orthopedic rod coordinate the structural representation after installing.
Detailed description of the invention
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, the special pedicle nail of this utility model PLIF, comprises Universal screw nail 1, screw base 2, locking snap ring 3, ring washer 4, pressure bar device 5, housing pin 6.Housing pin 6, pressure bar device 5, ring washer 4, locking snap ring 3 are from top to bottom arranged in the chamber 21 of screw base 2 successively.The head 11 activity holding of Universal screw nail 1 is in locking snap ring 3, and the screw rod 12 of Universal screw nail 1 extends to the below of screw base 2.Shown in composition graphs 6, Fig. 7, the upper surface of ring washer 4 offers two symmetrically arranged arcuate grooves 41, and the lower end of ring washer 4 is between screw base 2 inwall and locking snap ring 3 outer wall.Shown in composition graphs 8, Fig. 9, Figure 10, the movable upper end holding of pressure bar device 5 on housing pin 6 (namely pressure bar device 5 can relatively housing pin 6 do axial-rotation), the lower surface of pressure bar device 5 offers an arc-shaped slot 51, and the notch of the notch of arc-shaped slot 51 and arcuate groove 41 is oppositely arranged, housing pin 6 and screw base 2 are threaded connection.Locking snap ring 3 is inserted in the chamber 21 of screw base 2 from the upper end of screw base 2, and the lower end of locking snap ring 3 is supported on the step surface 2 22 of inside projection bottom screw base 2, and locking snap ring 3 can axial-rotation.The wall body of locking snap ring 3 offers a lot of groove 31, therefore has certain elasticity.When the axial compressive force that locking snap ring 3 is subject to is increasing, locking snap ring 3 can encircle the head 11 of tight Universal screw nail 1 gradually.
In the present embodiment, the centre of housing pin 6 offers up big and down small ladder hole, ladder hole comprises the non-circular hole 61 being positioned at top and the circular port 62 being positioned at below, the intersection forming station terrace 1 of non-circular hole 61 and circular port 62, the projection 52 of pressure bar device 5 upper end extends upwardly in non-circular hole 61 through circular port 62, and projection 52 upper end-face edge activity holding is on step surface 1.Non-circular hole 61 is any one in square hole or star-shaped aperture or trapezoidal hole, and the non-circular hole 61 in the present embodiment is positive hexagram hole.
Shown in Figure 11, in the present embodiment, be also provided with sealing cap 7 between screw base 2 and housing pin 6, sealing cap 7 outer wall and screw base 2 inwall are threaded connection, and sealing cap 7 inwall and housing pin 6 outer wall are threaded connection.
Shown in Figure 12, this utility model is not when locking housing pin 6, and Universal screw nail 1 can (swing of monolateral 25 o) 50 o, so when putting nail position not at same straight line, without the need to bending Orthopedic rod in screw base 2 inner circumferential.
Shown in Figure 13, the application process of this utility model in operation is as follows:
(1) screw rod 12 of Universal screw nail 1 is screwed into pedicle of vertebral arch;
(2) be installed on Universal screw nail 1 by the screw base 2 having installed locking snap ring 3 and ring washer 4, the head by Universal screw nail 1 snaps in locking snap ring 3;
(3) insert Orthopedic rod 8, Orthopedic rod 8 is placed on the arcuate groove 41 of ring washer 4;
(4) the pressure bar device 5 of holding on housing pin 6 is loaded screw base 2, make the arc-shaped slot 51 on pressure bar device 5 cover on Orthopedic rod 8;
(5) screw in sealing cap 7, and tighten housing pin 6.In the process of tightening housing pin 6, pressure bar device 5 moves down, and is clamped between arcuate groove 41 and arc-shaped slot 51 by Orthopedic rod 8 gradually.Meanwhile, the axial compressive force that locking snap ring 3 is subject to is also increasing, and locking snap ring 3 will encircle the head 11 of tight Universal screw nail 1 gradually.
This utility model is under the prerequisite meeting mechanical property, and Universal screw nail 1 focuses on the demand for development trend that incisura is low, volume is little in R & D design, reduces the stimulation of Post operation to tissue and the foreign body sensation of patient as far as possible.Meanwhile, all parts of the special pedicle nail of this utility model PLIF all adopt the medical titanium alloy manufacture close with skeleton elastic modelling quantity, and colorful anode oxidation processes has been carried out on surface, have good biocompatibility with human body.This utility model has fully merged the state-of-the-art technology in biomechanics, anatomy, materialogy, clinic etc. in design research and development, making every effort to the features such as structural design is simple, safe and reliable, operation technique convenient, therapeutic effect is good, will be the treatment product of domestic, external state-of-the-art lumbar spinal fusion clinically at present.
Above-described embodiment only illustrates inventive concept of the present utility model for explaining, but not the restriction to this utility model rights protection, all changes utilizing this design this utility model to be carried out to unsubstantiality, all should fall into protection domain of the present utility model.
Claims (5)
1. the special pedicle nail of PLIF, is characterized in that: comprise Universal screw nail, screw base, locking snap ring, ring washer, pressure bar device, housing pin, housing pin, pressure bar device, ring washer, locking snap ring is from top to bottom arranged in the chamber of screw base successively, the head movement holding of Universal screw nail is in locking snap ring, the screw rod of Universal screw nail extends to the below of screw base, the upper surface of ring washer offers two symmetrically arranged arcuate grooves, the lower end of ring washer is between screw base inwall and locking snap ring outer wall, the movable upper end holding of pressure bar device is on housing pin, the lower surface of pressure bar device offers an arc-shaped slot, and the notch of the notch of arc-shaped slot and arcuate groove is oppositely arranged, housing pin and screw base are threaded connection.
2. the special pedicle nail of PLIF as claimed in claim 1, it is characterized in that: the centre of described housing pin offers up big and down small ladder hole, ladder hole comprises the non-circular hole being positioned at top and the circular port being positioned at below, the intersection forming station terrace one of non-circular hole and circular port, the projection of pressure bar device upper end extends upwardly in non-circular hole through circular port, and projection upper end-face edge activity holding is on step surface one.
3. the special pedicle nail of PLIF as claimed in claim 2, is characterized in that: described non-circular hole is any one in square hole or star-shaped aperture or trapezoidal hole.
4. the special pedicle nail of PLIF as claimed in claim 1 or 2, it is characterized in that: be provided with sealing cap between described screw base and housing pin, sealing cap outer wall and screw base inwall are threaded connection, and sealing cap inwall and housing pin outer wall are threaded connection.
5. the special pedicle nail of PLIF as claimed in claim 1, is characterized in that: the lower end of described locking snap ring is supported on the step surface two of inside projection bottom screw base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420507190.1U CN204169917U (en) | 2014-09-04 | 2014-09-04 | The special pedicle nail of PLIF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420507190.1U CN204169917U (en) | 2014-09-04 | 2014-09-04 | The special pedicle nail of PLIF |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204169917U true CN204169917U (en) | 2015-02-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420507190.1U Active CN204169917U (en) | 2014-09-04 | 2014-09-04 | The special pedicle nail of PLIF |
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| Country | Link |
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| CN (1) | CN204169917U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104207836A (en) * | 2014-09-04 | 2014-12-17 | 浙江嘉佑医疗器械有限公司 | Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) |
| CN104758043A (en) * | 2015-04-30 | 2015-07-08 | 杨永军 | Method and device for achieving middle-upper thoracic vertebrae semi-pedicle screw fixation in posterior mode |
| CN113876410A (en) * | 2021-12-09 | 2022-01-04 | 中国医学科学院北京协和医院 | Improved locking structure and assembly method thereof |
-
2014
- 2014-09-04 CN CN201420507190.1U patent/CN204169917U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104207836A (en) * | 2014-09-04 | 2014-12-17 | 浙江嘉佑医疗器械有限公司 | Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) |
| CN104758043A (en) * | 2015-04-30 | 2015-07-08 | 杨永军 | Method and device for achieving middle-upper thoracic vertebrae semi-pedicle screw fixation in posterior mode |
| CN113876410A (en) * | 2021-12-09 | 2022-01-04 | 中国医学科学院北京协和医院 | Improved locking structure and assembly method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |