CN206934157U - A kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking - Google Patents
A kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking Download PDFInfo
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- CN206934157U CN206934157U CN201720074167.1U CN201720074167U CN206934157U CN 206934157 U CN206934157 U CN 206934157U CN 201720074167 U CN201720074167 U CN 201720074167U CN 206934157 U CN206934157 U CN 206934157U
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- rivet nut
- nail
- head
- nut
- lag
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 8
- 239000002639 bone cement Substances 0.000 claims abstract description 10
- 230000000399 orthopedic effect Effects 0.000 abstract description 4
- 238000013459 approach Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000012856 packing Methods 0.000 description 3
- 206010067484 Adverse reaction Diseases 0.000 description 2
- 230000006838 adverse reaction Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 208000008035 Back Pain Diseases 0.000 description 1
- 241001079814 Symphyotrichum pilosum Species 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 235000004224 Typha angustifolia Nutrition 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
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Abstract
A kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking, is related to the pedicle screw for posterior spinal operation.There is provided it is a kind of nail put by pedicle of vertebral arch when Via Posterior Spinal Approach fixes orthomorphia be used for the wide-angle Universal pedicle screw of fixed and orthopedic undercut mark Bidirectional locking be provided with the head of a nail and rivet nut, the spherical ailhead side of rivet nut is provided with U-lag, rivet nut is hollow rivet nut, the near-end of rivet nut is provided with proximal threads, the distal end of rivet nut is provided with distal threads, the depth of proximal threads is less than the depth of distal threads, distal threads are provided with through hole, distal threads are used to inject bone cement, the end of rivet nut is provided with hole, hole is used to inject bone cement, the head of a nail and rivet nut two-way locking device are provided between the head of a nail and rivet nut, U-lag is provided with lock nut, lock nut is used for the locking of U-lag and pitman.
Description
Technical field
The pedicle screw for posterior spinal operation is the utility model is related to, more particularly, to a kind of undercut mark reversible lock
Fixed wide-angle Universal pedicle screw.
Background technology
Posterior spinal operation is conventional modus operandi, when involving the need for fixed or orthopedic, follows closely rod internal fixation system
It is essential.This nail-stick system is generally made up of pedicle screw and its fastener and pitman, at present pedicle of vertebral arch screw
Nail can be basically divided into two kinds, i.e. single shaft fixes pedicle screw and multiaxis Universal pedicle screw.Use single shaft pedicle of vertebral arch screw
Nail technical requirements are very high for putting when nail is fixed, if the U-lag of 2 nails is not parallel, pitman is contacted with U-lag from face to be changed into
Point contact, forms stress concentration, easy broken nail or disconnected rod；During fixation to carry out more than 2 centrums, often because of side vertebral arch
Head of a nail direction is fixed after root screw placement, and head of a nail U-lag does not make placement pitman seem very difficult in same straight line, also face
Face the risk of stress concentration, and strength by U-lag and it is in alignment after easily cause screw loosening or disconnected not on straight line
Split.So not only make operation technique difficult, and the probability for internal fixation system adverse reaction occur increases.Universal pedicle screw gram
Above drawback has been taken, due to its universal feature, i.e., can make the three-dimensional rotation of certain angle between rivet nut and head of a nail U-lag, make nail-rod
Joint it is very easy.But the Universal active degree of the Universal pedicle screw used now is small, is not easy to load and takes over the baton, and
Locking mechanism is realized by the mechanical pressurization of single snib, therefore can not realize parallel support as single shaft pedicle screw
Open and compress, let alone rotation-removing orthopedic, therefore spinal fixation can only be used for.Nonetheless, the nail after these screws are fixed
Cap incisura is all higher, and is the most flourishing position of muscle above the pedicle locations inserted of screw, frequently results in postoperative fixation
There is chronic back pain because of the long-term frictionally damage of the high incisura head of a nail in the musculature at position.
As can be seen here, if a kind of wide-angle Universal pedicle screw of brand-new undercut mark Bidirectional locking, not only screw
For incisura than relatively low, Universal active scope is big, also multiple fastening locking device and breakout capacity, can not only simplify operation technique,
Shorten operating time, and operative effect can be improved, reduce the adverse reaction in long term, this would is that doctor and patient are common
Gospel.
Chinese patent CN101816587A discloses a kind of Universal pedicle screw for internal fixation of spine.It is by there is the vertebra of ball-type cap
Nut is followed closely through Universal-head sleeve, and Universal-head sleeve one end is arranged to " u "-shaped, and the other end is provided with the ball-type nest of through hole, " U "
Shape inwall one end sets Universal-head bush whorl, is threaded in the other end, the through-hole wall between screw thread and ball-type position
Upper setting is fluted；The spherical caps of pedicle nail, which are stuck in Universal-head sleeve, the ball-type nest position of through hole.One end is arranged to hemisphere
Shape concave surface, its outer wall one end are threaded, and the packing washer that the other end is arranged to shiny surface is threaded through the screw thread of Universal sleeve inwall
Screw in groove, correction thick stick is placed in the top of packing washer, screwing in screw thread nail pressing in the top of correction thick stick is formed；The locking knot
Structure is ingenious in design, both easy for installation, and and can avoids that packing ring comes off or the generation Clinical practice of tension phenomenon is safe and reliable.
The content of the invention
The purpose of this utility model is to provide puts nail for solid when Via Posterior Spinal Approach fixes orthomorphia by pedicle of vertebral arch
A kind of wide-angle Universal pedicle screw of fixed and orthopedic undercut mark Bidirectional locking.
The utility model is provided with the head of a nail and rivet nut, and the spherical ailhead side of rivet nut is provided with U-lag, and rivet nut is hollow rivet nut,
The near-end of rivet nut is provided with proximal threads, and the distal end of rivet nut is provided with distal threads, and the depth of proximal threads is less than the depth of distal threads
Degree, distal threads are provided with through hole, and distal threads are used to inject bone cement, and the end of rivet nut is provided with hole, and hole is used to inject
Bone cement, is provided with the head of a nail and rivet nut two-way locking device between the head of a nail and rivet nut, U-lag is provided with lock nut, lock nut
Locking for U-lag and pitman.
The head of a nail can use the undercut mark head of a nail.
The utility model is in order to meet three-dimensional activity of the Universal pedicle screw in certain range of degrees, and U-lag is with following closely
Body is separated, and U-lag is placed in the spherical ailhead side of rivet nut, and the bottom of U-lag can reach the bottom surface of spherical ailhead, so
The incisura of the head of a nail is just very low, and the mobility between the head of a nail and ailhead substantially increases, and single direction can reach 35 ° of wide-angle
Activity, and moved in U-lag, be advantageous to load and take over the baton, nail difficulty is put in reduction.
In order to strengthen locking fixed effect, there is double locking member between ailhead and the head of a nail：The head of a nail has one with spherical ailhead
Large-size nut locking device with angle of inclination, Universal screw nail can be locked into uni-axial screws, angle of inclination substantially reduces spiral shell
Follow closely inclined side incisura；After U-lag installation pitman, fastened and locked with lock nut, double locking makes locking effect more reliable.
In order to increase the breakout capacity of screw, rivet nut is hollow structure, and near-end is shallow thread, is distally deep thread, deep spiral shell
There is through hole to be connected with hollow structure in line, bone cement can be injected by hollow structure, increase screw breakout capacity.
The incisura of the head of a nail of the present utility model is very low, and rivet nut Universal active degree is very big, and universal lock is double locking,
Lock solid and reliable, rivet nut is hollow, and from the superficial to the deep, breakout capacity is strong for rivet nut screw thread, puts that nail difficulty is low, and fixed effect is very good,
Bad complication is low.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of the utility model embodiment 1.
Embodiment
Following examples will be further described with reference to accompanying drawing to the utility model.
Embodiment 1
Referring to Fig. 1, the utility model embodiment 1 is provided with the head of a nail 1 and rivet nut 3, and the side of spherical ailhead 31 of rivet nut 3 is provided with U
Shape groove 9, rivet nut 3 are hollow rivet nut, and the near-end of rivet nut 3 is provided with proximal threads 4, and the distal end of rivet nut 3 is provided with distal threads 5, near-end
The depth of screw thread 4 is less than the depth of distal threads 5, and distal threads 5 are provided with through hole 6, and distal threads 5 are used to inject bone cement,
The end of rivet nut 3 is provided with hole 7, and hole 7 is used to inject bone cement, and the head of a nail and rivet nut reversible lock are provided between the head of a nail 1 and rivet nut 3
Determine device 2, U-lag 9 is provided with lock nut 8, and lock nut 8 is used for the locking of U-lag 9 and pitman.
The head of a nail 1 uses the undercut mark head of a nail.
U-lag 9 is located at the side of spherical ailhead 31 of rivet nut 3, pitman is easily installed, because the bottom of U-lag 9 can be with low
To the bottom surface of spherical ailhead 31, therefore the incisura of the head of a nail is very low.
The locking of spherical ailhead 31 and the head of a nail 1 is locked by the large-size nut with angle of inclination, and angle of inclination can be reduced
The nut incisura of inclined side, lock nut size is larger, and locking effect is more preferable.Meanwhile U-lag 9 and pitman are by locking spiral shell
Mother 8 fastens to lock.
Rivet nut is hollow structure, and proximal threads 4 are shallow threads, and distal threads 5 are deep threads, also have through hole 6 in deep thread
Connected with hollow structure, bone cement can be injected by hollow structure, increase screw breakout capacity.
The utility model material therefor is the medical titanium alloy material best with tissue compatibility.
Embodiment 2
Similar to Example 1 referring to Fig. 2, it distinguishes the locking of the spherical ailhead 31 and the head of a nail 1 that are rivet nut 3 by big chi
Very little nut locking, lock nut size is larger, and locking effect is more preferable.Meanwhile U-lag 9 is locked with pitman by lock nut 8
Fastening.
Claims (2)
1. a kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking, it is characterised in that provided with the head of a nail and rivet nut, rivet nut
Spherical ailhead side be provided with U-lag, rivet nut is hollow rivet nut, and the near-end of rivet nut is provided with proximal threads, and the distal end of rivet nut is provided with
Distal threads, the depth of proximal threads are less than the depth of distal threads, and distal threads are provided with through hole, and distal threads are used to inject
Bone cement, the end of rivet nut are provided with hole, and hole is used to inject bone cement, is provided with the head of a nail between the head of a nail and rivet nut and rivet nut is two-way
Locking device, U-lag are provided with lock nut, and lock nut is used for the locking of U-lag and pitman.
2. a kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking as claimed in claim 1, it is characterised in that described
The head of a nail uses the undercut mark head of a nail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720074167.1U CN206934157U (en) | 2017-01-19 | 2017-01-19 | A kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720074167.1U CN206934157U (en) | 2017-01-19 | 2017-01-19 | A kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206934157U true CN206934157U (en) | 2018-01-30 |
Family
ID=61357528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720074167.1U Active CN206934157U (en) | 2017-01-19 | 2017-01-19 | A kind of wide-angle Universal pedicle screw of undercut mark Bidirectional locking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206934157U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114903579A (en) * | 2021-02-09 | 2022-08-16 | 长庚大学 | Double-path vertebral bone nail with strengthening and fixing function |
| US11839414B1 (en) | 2022-12-22 | 2023-12-12 | Masal Inc. | Spinal stability system |
-
2017
- 2017-01-19 CN CN201720074167.1U patent/CN206934157U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114903579A (en) * | 2021-02-09 | 2022-08-16 | 长庚大学 | Double-path vertebral bone nail with strengthening and fixing function |
| US11839414B1 (en) | 2022-12-22 | 2023-12-12 | Masal Inc. | Spinal stability system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210628 Address after: 430000 A106, building B5, b4-b8, Wuhan National Biological Industry (Jiufeng innovation) base, 666 Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan Chenyi medical technology partnership (L.P.) Address before: Room 1803, No.2, Wuyuan East Sanli, Huli District, Xiamen City, Fujian Province, 361000 Patentee before: Zhang Yibei |