CN104207836A - Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) - Google Patents
Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) Download PDFInfo
- Publication number
- CN104207836A CN104207836A CN201410446662.1A CN201410446662A CN104207836A CN 104207836 A CN104207836 A CN 104207836A CN 201410446662 A CN201410446662 A CN 201410446662A CN 104207836 A CN104207836 A CN 104207836A
- Authority
- CN
- China
- Prior art keywords
- screw
- snap ring
- screw base
- plif
- nail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Neurology (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) and belongs to the technical field of a medical instrument. The pedicle screw comprises a universal screw, a screw base, a locking snap ring, an annular gasket, a stick pressing device and a compression screw, wherein the compression screw, the stick pressing device, the annular gasket and the locking snap ring are sequentially arranged in a chamber of the screw base from top to bottom; the head of the universal screw is moveably arranged in the locking snap ring in a clamping way; the screw rod of the universal screw extends towards the downside of the screw base; two symmetrical arc grooves are formed in the upper end surface of the annular gasket; the lower end of the annular gasket is positioned between the inner wall of the screw base and the outer wall of the locking snap ring; the upper end of the stick pressing device is moveably arranged on the compression screw in a clamping way; an arc through groove is formed in the lower end surface of the stick pressing device; the groove opening of the arc through groove is opposite to the groove openings of the arc grooves; the compression screw and the screw base are connected through screw threads. The pedicle screw special for PLIF is short in surgery process and simple in operation and has small wound area for a patient.
Description
Technical field
The present invention relates to the special pedicle nail of a kind of PLIF, belong 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.
Summary of the invention
The object of this invention is 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 solution adopted in the present invention 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 PLIF of the present invention 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 PLIF of the present invention 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 the present invention 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 invention will be further described.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of Universal screw nail in the present invention;
Fig. 3 is the structural representation of screw base in the present invention;
Fig. 4 is the structural representation locking snap ring in the present invention;
Fig. 5 be Fig. 4 look up structural representation;
Fig. 6 is the structural representation of ring washer in the present invention;
Fig. 7 is the perspective view of Fig. 6;
Fig. 8 be in the present invention pressure bar device and housing pin assembling after structural representation;
Fig. 9 is the structural representation of housing pin in the present invention;
Figure 10 is the plan structure schematic diagram of Fig. 9;
Figure 11 is the structural representation of sealing cap in the present invention;
Figure 12 is the swingable schematic diagram of the Universal screw nail in the present invention;
Figure 13 is that the present invention 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 PLIF of the present invention, 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, the present invention 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 the present invention 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.
The present invention 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 PLIF of the present invention 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.The state-of-the-art technology in biomechanics, anatomy, materialogy, clinic etc. has fully been merged in the present invention 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 invention for explaining, but not the restriction to rights protection of the present invention, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should fall into protection scope of the present invention.
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 |
|---|---|---|---|
| CN201410446662.1A CN104207836A (en) | 2014-09-04 | 2014-09-04 | Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410446662.1A CN104207836A (en) | 2014-09-04 | 2014-09-04 | Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104207836A true CN104207836A (en) | 2014-12-17 |
Family
ID=52090026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410446662.1A Pending CN104207836A (en) | 2014-09-04 | 2014-09-04 | Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104207836A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108186094A (en) * | 2018-02-10 | 2018-06-22 | 吉林百恩医疗器械科技有限公司 | A kind of novel fast insertion type galianconism multi-axial screws |
| CN109778278A (en) * | 2019-03-08 | 2019-05-21 | 北京致成生物医学科技有限公司 | Have the preparation method of the nail-stick system of wear-resistant bits coating and the nail-stick system of preparation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101198284A (en) * | 2005-04-25 | 2008-06-11 | 新特斯有限责任公司 | Bone anchor with locking cap and method of spinal fixation |
| US20120041490A1 (en) * | 2009-11-18 | 2012-02-16 | Synthes Usa, Llc | Variable offset spine fixation system and method |
| CN102368967A (en) * | 2009-04-15 | 2012-03-07 | 斯恩蒂斯有限公司 | Revision connector for spinal constructs |
| CN102458279A (en) * | 2009-06-17 | 2012-05-16 | 斯恩蒂斯有限公司 | Revision connector for spinal constructs |
| WO2014052117A1 (en) * | 2012-09-28 | 2014-04-03 | Medos International Sarl | Bone anchor assemblies |
| CN204169917U (en) * | 2014-09-04 | 2015-02-25 | 浙江嘉佑医疗器械有限公司 | The special pedicle nail of PLIF |
-
2014
- 2014-09-04 CN CN201410446662.1A patent/CN104207836A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101198284A (en) * | 2005-04-25 | 2008-06-11 | 新特斯有限责任公司 | Bone anchor with locking cap and method of spinal fixation |
| CN102368967A (en) * | 2009-04-15 | 2012-03-07 | 斯恩蒂斯有限公司 | Revision connector for spinal constructs |
| CN102458279A (en) * | 2009-06-17 | 2012-05-16 | 斯恩蒂斯有限公司 | Revision connector for spinal constructs |
| US20120041490A1 (en) * | 2009-11-18 | 2012-02-16 | Synthes Usa, Llc | Variable offset spine fixation system and method |
| WO2014052117A1 (en) * | 2012-09-28 | 2014-04-03 | Medos International Sarl | Bone anchor assemblies |
| CN204169917U (en) * | 2014-09-04 | 2015-02-25 | 浙江嘉佑医疗器械有限公司 | The special pedicle nail of PLIF |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108186094A (en) * | 2018-02-10 | 2018-06-22 | 吉林百恩医疗器械科技有限公司 | A kind of novel fast insertion type galianconism multi-axial screws |
| CN109778278A (en) * | 2019-03-08 | 2019-05-21 | 北京致成生物医学科技有限公司 | Have the preparation method of the nail-stick system of wear-resistant bits coating and the nail-stick system of preparation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10758277B2 (en) | Bone fixation assembly | |
| US9827021B2 (en) | Transverse connector | |
| US7918876B2 (en) | Spinal implant adjustment device | |
| US5562737A (en) | Extra-discal intervertebral prosthesis | |
| EP3003228B1 (en) | Modular humeral prosthesis | |
| US20120221108A1 (en) | Orthopedic device assembly with elements coupled by a retaining structure | |
| US20110112644A1 (en) | Disc prosthetic implant device | |
| CN204839838U (en) | Artifical neck intervertebral disc false body | |
| CN104840281B (en) | Artificial vertebral body | |
| CN204169917U (en) | The special pedicle nail of PLIF | |
| US20120197315A1 (en) | Screw for fixing vertebra | |
| WO2012012035A2 (en) | Toroid-shaped spinal disc | |
| CN206044709U (en) | A kind of automatically reset pedicle nail | |
| CN105596071B (en) | A kind of dual-purpose pedicle nail | |
| CN104207836A (en) | Pedicle screw special for PLIF (Posterior Lumbar Interbody Fusion) | |
| CN111012462B (en) | Device for stabilizing bone segment surgery, extension assembly, locking part and assembly method thereof | |
| CN111902098A (en) | Split dynamic and static dual-purpose pedicle screw and mounting tool thereof | |
| WO2021258546A1 (en) | Assembled cervical vertebra and uncovertebral joint fusion cage | |
| CN103494658A (en) | Combined intervertebral disc cage assembly capable of being implanted in minimally invasive mode | |
| CN105078623A (en) | Biological self-locking artificial intervertebral disk system and application thereof | |
| CN211460689U (en) | Distracting intervertebral disc fusion device | |
| CN114145888A (en) | Atlantoaxial joint prosthesis | |
| CN204971720U (en) | It is biological from artifical intervertebral disc system of lock | |
| CN205458980U (en) | Interior suspension type developments support pedicle screw | |
| CN110141404A (en) | Cervical vertebra implant system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141217 |