CN206151558U - Intensive pedicle of vertebral arch screw of nail way - Google Patents
Intensive pedicle of vertebral arch screw of nail way Download PDFInfo
- Publication number
- CN206151558U CN206151558U CN201620898358.5U CN201620898358U CN206151558U CN 206151558 U CN206151558 U CN 206151558U CN 201620898358 U CN201620898358 U CN 201620898358U CN 206151558 U CN206151558 U CN 206151558U
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- China
- Prior art keywords
- screw
- threaded rod
- groove
- pedicle
- bone cement
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Abstract
The utility model discloses an intensive pedicle of vertebral arch screw of nail way, including head, solid threaded rod and forming the screw thread in solid threaded rod outer fringe, arrange two at least recesses that are used for filling bone cement in the outer fringe of solid threaded rod, the axle center direction of the every solid threaded rod in recess edge runs through screw thread back groove separates into a plurality of screw thread district with the screw thread. Through coat the moderate bone cement of viscosity in the recess after, in saying its pedicle screw who twists the patient, twisting the in -process, because of the recess bottom is less than the screw root, the pedicle screw way can be brought smoothly into to the bone cement of recess, and twists the action along with revolving, and bone cement can be comparatively even scatters the internal surface and the screw surface of saying at pedicle screw for bone cement distributes evenly, and especially centrum rear portion and partial vertebral arch root all can intensified, and then improve the utility model discloses and the adhesion strength between the pedicle screw way, the reinforcing resistance to plucking is exerted oneself, can effectively reduce bone cement seepage complication, X -ray radiation damage in the reduction art.
Description
Technical field
The utility model is related to a kind of fixed apparatus in medical instruments field research field, particularly a kind of screw way reinforcing
Pedicle screw.
Background technology
With China's astogeny aggravation, in Spinal fractures field, senile spinal disease incidence rises year by year, wherein
It is common with degenerative lumbar spinal stenosisshadow-defect, the protrasion of the lumbar intervertebral disci, lumber spondylolisthesis, degenerated spine lateral bending deformity etc..Such disease
During sick operative treatment at present, using fixing most commonly seen in pedicle screw.But gerontal patient is often accompanied by osteoporosis, can shadow
The common pedicle screw hold of sound, hold would generally decline, and its consequence can cause the shakiness of pedicle screw, loosen, pulls out
Go out, in turn result in Cage subsidence, backbone is fixed, orthopedic failure, therefore its fixed effect does not reach interior fixed requirement.Therefore,
How to improve pedicle screw interior fixing intensity in osteoporosis centrum has become spinal surgery a major challenge.
Spinal fractures doctor often when pedicle screw is inserted, injects bone cement to strengthen screw way by screw way, increases vertebra
Fastness between pedicle screw and screw way, to reach resistance to plucking except purpose.
The screw way cement augmentation mode for adopting at present is commonly used to have bone cement hollow Pediculus arcus vertebrae screw and use and injects bone water
The special push rod of mud injects after bone cement toward in pedicle screw trajectory and is screwed into screw again.Though above-mentioned two master slave mode can obtain certain vertebra
Pedicle screw resistance to plucking is except effect.But there are still some shortcomings part.Bone cement hollow Pediculus arcus vertebrae screw is anterior by screw
Side opening disperse is effectively reduced the risk of bone cement Jing screw way seepages to centrum front middle part, but bone cement is only distributed in centrum
Front middle part, pedicle of vertebral arch and centrum rear portion screw way are not strengthened, and screw inside is hollow, makes the anti-fatigue performance and power of screw
Credit cloth changes, and price costly fails to be widely popularized to use.With the special push rod of common bone cement because of push rod end
Only portal, bone cement is also generally only distributed in centrum front middle part, centrum rear portion and pedicle portion screw way also fail reinforcing, and
During using push rod to screw way injection bone cement, generally had an X-rayed again using blind postponing, bone cement has extravasation and causes blood vessel, neurotrosis
Risk.Although medical worker can reduce bone cement extravasation by increasing fluoroscopy during operation number of times in art, because bone cement is about in 15-
Start hardening in 20 minutes, if operation is slow, affect inserting for pedicle screw.And fluoroscopy during operation increased frequency, can increase
Medical worker and patient's x-ray radiation are damaged.
Utility model content
The purpose of this utility model, is to provide a kind of screw way to strengthen pedicle screw.
The utility model solves the solution of its technical problem：Screw way strengthen pedicle screw, including head, from institute
The head solid threaded rod being downwardly extending and the screw thread for being formed in solid threaded rod outer rim are stated, the solid threaded rod
At least two grooves for filling bone cement are disposed with outer rim, are passed through per axis direction of the groove described in bar along solid threaded rod
Wear screw thread rearward recess and screw thread is separated into into several threaded areas.
As the further improvement of above-mentioned technical proposal, root boss is reserved between the groove and head, it is described
The length of root boss is equal to the length of 0.1 ~ 0.3 times of solid threaded rod.
As the further improvement of above-mentioned technical proposal, some are separated into by spacing block per inside grooves described in bar
Groove.
Used as the further improvement of above-mentioned technical proposal, the quantity of the groove is two, and two grooves symmetrically divide
Cloth is on the circumference of solid threaded rod longitudinal cross-section.
Used as the further improvement of above-mentioned technical proposal, the quantity of the groove is three, and three grooves are in product word
Shape is distributed on the circumference of solid threaded rod longitudinal cross-section.
Used as the further improvement of above-mentioned technical proposal, the bottom of the groove is less than the tooth root of screw thread.
Used as the further improvement of above-mentioned technical proposal, the longitudinal cross-section of the groove is semicircle, half elliptic, rectangle
Or it is trapezoidal in one kind.
Used as the further improvement of above-mentioned technical proposal, the head includes nail seat, lock nut and in nail seat
U-lag, the lock nut is by being threadably mounted on U-lag on U-lag madial wall.
Used as the further improvement of above-mentioned technical proposal, the head includes nail seat, lock nut and in nail seat
U-lag, by being threadably mounted on U-lag on U-lag madial wall, the lower end of the nail seat is disposed with the lock nut
One spherical adjustment chamber, spherical adjuster, the spherical regulation are provided with the solid threaded rod on one end of nail seat
Device is embedded in adjustment chamber and can turn around adjustment dynamic.
The beneficial effects of the utility model are：After the utility model is by coating in a groove modest viscosity bone cement, will
It is screwed in the pedicle screw trajectory of patient, and during being screwed into, because bottom portion of groove is less than thread root, the bone cement of groove can be suitable
Profit brings pedicle screw trajectory into, and with screwing action, bone cement can more be evenly distributed in the inner surface of pedicle screw trajectory and
Screw surface so that bone cement is evenly distributed, especially centrum rear portion and part pedicles can be strengthened, Jin Erti
Adhesion strength between high the utility model and pedicle screw trajectory, because solid threaded rod root is not provided with groove root is arranged
Portion's boss, its surface can prevent from being fully screwed into bone cement after screw and exosmose along pedicle screw trajectory without bone cement is applied before being screwed into, office
Portion's boss can be such that screw root is more close to pedicle of vertebral arch inwall, because clinically pedicle screw fracture often betides screw root
Portion, the solid threaded rod root arranges root boss, increased the anti-fatigue performance of solid threaded rod root.Operation technique mistake
Cheng Zhong, because do not exist it is blind into screw way push away or inject bone cement situation, pedicle screw trajectory in-seam cement grouting local pressure is without liter
Height, can effectively prevent bone cement from exosmosing.Can reduce simultaneously carries out the number of times of fluoroscopy during operation to prevent bone cement from exosmosing, from
And reduce the infringement of X-ray radiation.The utility model is solved in prior art using pouring-in hollow bone cement screw or bone water
Insert bone cement extravasation or the skewness of screw presence, centrum rear portion reinforcing weakness and X after mud push rod injection bone cement again
The problem of light radiation.Further, since using solid threaded rod, the utility model is stronger than existing hollow bone cement pedicle screw
Degree increases.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the utility model embodiment, below will be to needed for embodiment description
The accompanying drawing to be used is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present utility model, rather than entirely
Portion's embodiment, those skilled in the art on the premise of not paying creative work, can be obtaining it according to these accompanying drawings
His design and accompanying drawing.
Fig. 1 is the structural representation of the utility model embodiment one；
Fig. 2 is the structural representation of the utility model embodiment two；
Fig. 3 is the structural representation of the utility model embodiment three；
Fig. 4 is the side view of the utility model embodiment one；
Fig. 5 is the side view of the utility model embodiment two or embodiment three；
Fig. 6 is structural representation of the present utility model.
Specific embodiment
The technique effect of design of the present utility model, concrete structure and generation is carried out below with reference to embodiment and accompanying drawing
Clearly and completely describe, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of embodiment of the present utility model, rather than whole embodiments, based on embodiment of the present utility model, the skill of this area
The other embodiment that art personnel are obtained on the premise of not paying creative work, belongs to the model of the utility model protection
Enclose.In addition, all connection/annexations being previously mentioned in text, not singly refer to that component directly connects, and refer to can be according to concrete reality
Situation is applied, by adding or reducing couple auxiliary more excellent draw bail is constituted.
With reference to Fig. 1～Fig. 6, screw way reinforcing pedicle screw, including head 1, the reality that is downwardly extending from the head 1
Heart threaded rod 2 and the screw thread 3 of the outer rim of solid threaded rod 2 is formed in, the end of solid threaded rod 2 is provided with tapering, the reality
At least two grooves 4 for filling bone cement are disposed with the outer rim of heart threaded rod 2, per groove described in bar 4 along solid screw thread
Screw thread 3 is separated into several threaded areas by the axis direction of bar 2 through the rearward recess 4 of screw thread 3.
After coating modest viscosity bone cement in groove 4, it is screwed in the pedicle screw trajectory of patient, had been screwed into
Cheng Zhong, because the bottom of groove 4 is less than the root of screw thread 3, the bone cement of groove 4 can smoothly bring pedicle screw trajectory into, and dynamic with screwing
Make, bone cement can more be evenly distributed in the inner surface of pedicle screw trajectory and screw surface so that bone cement is evenly distributed, especially
It is that centrum rear portion and part pedicles can be strengthened, and then is improved between the utility model and pedicle screw trajectory
Adhesion strength, root boss 5 is arranged because the root of solid threaded rod 2 is not provided with groove 4, and its surface is without painting bone before being screwed into
Cement, can prevent from being fully screwed into bone cement after screw and exosmose along pedicle screw trajectory, and local strengthening block 5 can make screw root and vertebral arch
Root inwall is more close to, and because clinically pedicle screw fracture often betides screw root, the root of solid threaded rod 2 arranges root
Portion's boss, increased the anti-fatigue performance of the root of solid threaded rod 2.It is blind into screw way because not existing in operative process
Bone cement situation is pushed away or injects, pedicle screw trajectory in-seam cement grouting local pressure can effectively prevent bone cement from exosmosing without rising.
Can reduce simultaneously carries out the number of times of fluoroscopy during operation to prevent bone cement from exosmosing, so as to reduce the infringement of X-ray radiation.The reality
With it is new solve in prior art using pouring-in hollow bone cement screw or bone cement push rod injection bone cement after insert again
The problem of bone cement extravasation or skewness that screw is present, centrum rear portion reinforcing weakness and X-ray radiation.Further, since adopting
With solid threaded rod 2, the utility model increases than existing hollow bone cement pedicle screw intensity.It is further used as preferred
Embodiment, is reserved with root boss 5 between the groove 4 and head 1, and the length of the root boss 5 is equal to 0.1 ~
The length of 0.3 times of solid threaded rod 2, by root boss 5 hardness of the present utility model and shear strength can be strengthened, and prevented
The junction fracture of head 1 and threaded rod 2 when only using.Preferably, the length of root boss 5 is equal to 0.2 times of solid screw thread
The length of bar 2.
It is further used as preferred embodiment, some grooves being separated into by spacing block 7 per the inside of groove described in bar 4
6, after in the pedicle screw trajectory that Cement fixation is screwed in patient after some grooves 6 are interior, bone cement can be more
The region being evenly distributed on corresponding to a groove 6, and then improve the adhesion strength between the utility model and pedicle screw trajectory.Screw thread
3 outer surfaces for also being disposed on spacing block 7.
It is further used as preferred embodiment, the quantity of the groove 4 is two, and two grooves 4 are symmetrical
On the circumference of the longitudinal cross-section of solid threaded rod 2.
It is further used as preferred embodiment, the quantity of the groove 4 is three, and three grooves 4 are in isosceles triangle
It is distributed on the circumference of the longitudinal cross-section of solid threaded rod 2.
It is further used as preferred embodiment, the bottom of the groove 4 is so easy to fill out less than the tooth root of screw thread 3
Fill more bone cements.
Be further used as preferred embodiment, the longitudinal cross-section of the groove 4 be semicircle, half elliptic, rectangle or
One kind in trapezoidal.
It is further used as preferred embodiment, the head includes nail seat 10, lock nut and in nail seat 10
U-lag 11, the lock nut is by being threadably mounted on U-lag 11 on the madial wall of U-lag 11.The pedicle of vertebral arch of this structure
Screw is one-way type pedicle screw, it is impossible to adjust angle.
It is further used as preferred embodiment, the head includes nail seat 10, lock nut and in nail seat 10
U-lag 11, the lock nut by being threadably mounted on U-lag 11 on the madial wall of U-lag 11, under the nail seat 10
End is disposed with a spherical adjustment chamber, and spherical adjuster, institute are provided with one end of nail seat 10 in the solid threaded rod
State spherical adjuster to be embedded in adjustment chamber and can turn around adjustment dynamic.Root boss 5 is located at spherical adjuster and solid spiral shell
Between the screw thread of rasp bar.The pedicle screw of this structure is universal type pedicle screw, is turned in adjustment chamber by spherical adjuster
The dynamic angle for adjusting solid threaded rod 2.
It is more than that better embodiment of the present utility model is illustrated, but the invention is not limited to institute
Embodiment is stated, those of ordinary skill in the art can also make a variety of equivalents on the premise of without prejudice to the utility model spirit
Modification or replacement, the modification of these equivalents or replacement are all contained in the application claim limited range.
Claims (10)
1. screw way strengthens pedicle screw, it is characterised in that：Including head, the solid screw thread being downwardly extending from the head
Bar and the screw thread of solid threaded rod outer rim is formed in, at least two are disposed with the outer rim of the solid threaded rod for filling
The groove of bone cement, along the axis direction of solid threaded rod is separated on screw thread through screw thread rearward recess some per groove described in bar
Individual threaded area.
2. screw way according to claim 1 strengthens pedicle screw, it is characterised in that：Reserve between the groove and head
There is root boss, the length of the root boss is equal to the length of 0.1 ~ 0.3 times of solid threaded rod.
3. screw way according to claim 1 strengthens pedicle screw, it is characterised in that：Per inside grooves described in bar by dividing
Spacer block is separated into some grooves.
4. screw way according to claim 1 strengthens pedicle screw, it is characterised in that：Screw thread in the groove and screw thread
Groove is connected.
5. the screw way according to claim 1 or 2 or 3 or 4 strengthens pedicle screw, it is characterised in that：The number of the groove
Measure as two, two grooves are symmetrically distributed on the circumference of solid threaded rod longitudinal cross-section.
6. the screw way according to claim 1 or 2 or 3 or 4 strengthens pedicle screw, it is characterised in that：The number of the groove
Measure as three, three grooves are distributed on the circumference of solid threaded rod longitudinal cross-section in isosceles triangle.
7. the screw way according to claim 1 or 2 or 3 or 4 strengthens pedicle screw, it is characterised in that：The bottom of the groove
Tooth root of the portion less than screw thread.
8. the screw way according to claim 1 or 2 or 3 or 4 strengthens pedicle screw, it is characterised in that：The groove it is vertical
To section be semicircle, half elliptic, rectangle or it is trapezoidal in one kind.
9. the screw way according to claim 1 or 2 or 3 or 4 strengthens pedicle screw, it is characterised in that：The head includes
Nail seat, lock nut and the U-lag in nail seat, the lock nut on U-lag madial wall by being threadably mounted at U
On shape groove.
10. the screw way according to claim 1 or 2 or 3 or 4 strengthens pedicle screw, it is characterised in that：The head includes
Nail seat, lock nut and the U-lag in nail seat, the lock nut on U-lag madial wall by being threadably mounted at U
On shape groove, the lower end of the nail seat is disposed with a spherical adjustment chamber, sets on one end of nail seat in the solid threaded rod
Spherical adjuster is equipped with, the spherical adjuster is embedded in adjustment chamber and can turn around adjustment dynamic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620898358.5U CN206151558U (en) | 2016-08-17 | 2016-08-17 | Intensive pedicle of vertebral arch screw of nail way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620898358.5U CN206151558U (en) | 2016-08-17 | 2016-08-17 | Intensive pedicle of vertebral arch screw of nail way |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206151558U true CN206151558U (en) | 2017-05-10 |
Family
ID=58648204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620898358.5U Active CN206151558U (en) | 2016-08-17 | 2016-08-17 | Intensive pedicle of vertebral arch screw of nail way |
Country Status (1)
| Country | Link |
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| CN (1) | CN206151558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107981926A (en) * | 2017-09-20 | 2018-05-04 | 北京航空航天大学 | The new resistance to plucking based on increases material manufacturing technology goes out pedicle nail |
| CN109589163A (en) * | 2019-01-25 | 2019-04-09 | 江苏嘉斯康医疗科技有限公司 | A kind of double thread centrum nail |
-
2016
- 2016-08-17 CN CN201620898358.5U patent/CN206151558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107981926A (en) * | 2017-09-20 | 2018-05-04 | 北京航空航天大学 | The new resistance to plucking based on increases material manufacturing technology goes out pedicle nail |
| CN109589163A (en) * | 2019-01-25 | 2019-04-09 | 江苏嘉斯康医疗科技有限公司 | A kind of double thread centrum nail |
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