CN207768496U - Hollow Pediculus arcus vertebrae screw for conveying bone cement and bone cement delivery device - Google Patents
Hollow Pediculus arcus vertebrae screw for conveying bone cement and bone cement delivery device Download PDFInfo
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- CN207768496U CN207768496U CN201720715415.6U CN201720715415U CN207768496U CN 207768496 U CN207768496 U CN 207768496U CN 201720715415 U CN201720715415 U CN 201720715415U CN 207768496 U CN207768496 U CN 207768496U
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Abstract
The utility model discloses a kind of hollow Pediculus arcus vertebrae screws and bone cement delivery device for conveying bone cement, hollow Pediculus arcus vertebrae screw includes the head of screw and shank of screw being connected with each other, head of screw has through-hole, shank of screw has blind hole, the one end of shank of screw far from the head of screw is enclosed construction, and the through-hole of head of screw is connected to the blind hole of shank of screw, and multiple side openings are additionally provided on the side wall of shank of screw, side opening is connected to blind hole.The line of the central point of the external port of multiple side openings forms a threaded line.Multiple side openings are divided into multilayer, and are less than the side opening aperture of the blind end far from shank of screw close to the aperture of the side opening of the blind end of shank of screw.The hollow Pediculus arcus vertebrae screw and bone cement delivery device for conveying bone cement of the utility model; the unimpeded of bone cement access in hollow Pediculus arcus vertebrae screw can be effectively ensured; the cortex bone of centrum offside is protected not destroyed by the internal pressure of bone cement, and the distributed effect of bone cement is more preferable.
Description
Technical field
The utility model is related to medical instrument structure-design technique field, espespecially a kind of hollow vertebra for conveying bone cement
Pedicle screw and bone cement delivery device.
Background technology
Lumbar spinal stenosis (Lumbar Spinal Stenosis, LSS) is typically to describe the variation of canalis spinalis anatomic dimensions
Symptom.Verbiest was proposed for the clinical description of lumbar spinal stenosis in 1954 at first, and for the elderly, LSS is that height is disabled
Disease.The most common reason of lumbar spinal stenosis is degenerative lumbar.In lower lumbar spine, the pathological manifestations of regression are for the regression usually morbidity
Disc height reduces, and ligamentum flavum and articular surface thicken, and backbone center canalis spinalis, cornucopia, vertebral foramen spacing and size become
Change.
The most common clinical manifestation of lumbar spinal stenosis is walked lamely for nerve, also cries false walk lamely.Nerve limping refers to
The feeling of pain of leg is around buttocks, the front of groin and leg, while the radial rear for reaching foot and leg downwards.In addition to pain
Bitterly, the performance of leg further includes feeling of fatigue, sense of heaviness, or along with cacesthesia.The patient of lumbar spinal stenosis is also with night
Leg cramps and neurogenic bladder symptom.Nerve one crucial symptom of limping is the feeling of pain of patient and the posture of patient
Have much relations, feeling of pain is reduced when patient is anteflexion, after when stretching, feeling of pain increases, pain when walking or standing that What is more
Sense increases, and feeling of pain is reduced when seat, and there are about the puzzlements that the people of 15%-20% can undergo low back pain every year.
Operative treatment compares other treatment method, such as：Physical therapy/expectant treatment, drug therapy, epidural injection are controlled
It treats, effect is best.Internal fixation of spine technology is one such therapeutic method of surgery.It is intended to before adjacent centrum is passed through,
Afterwards or circumferential direction, it is attached by bone item (autologous bone or homogeneous allogenic bone) or surgical instrument.Internal fixation of spine technology purport
It is eliminating due to regression, the super amplitude caused by vertebral instability segment moves and the symptom brought.Internal fixation of spine technology, as
" goldstandard " for treating degenerative diseases of lumbar vertebrae, is widely used in clinical treatment.Internal fixation of spine technology can be entirely limited disease
Become the activity of segment, effectively rebuilds way of escape stability.
Internal fixation of spine technology starts from the 1950s, Paul Harrington are correction scoliosis and maintain to rectify
Shape has developed the 1st kind of fracture or dislocation system i.e. Harrington systems (Harrington's stick), and reports clinical application in 1962
As a result.In the 1970s, with " segmental internal fixation of spine " theory generation, go in ring Luque internal fixation systems once one
Spend the fashionable whole world.Its advantage is that fixation is solid, but it is complicated to perform the operation, and will increase spinal cord damage by epidural space per one steel wire
The chance of wound；Thereafter Charles Robert Richet Cotrel and engineer Dubousset, has developed C-D during the 1980s
(Cotrel-Dubousset) internal fixation system.With the development of spinal biomechanics research and material science, internal fixation of spine
Technology achieves huge advance, in backbone degenerative disease, tumor of spine, wound so that being obtained in the operative treatments such as Spondylitis
Extensive use is arrived.
Currently, three columns that cervical arc root screw internal fixing system can efficiently accomplish backbone are fixed, meet the fixed life of backbone
Object mechanical requirements have become common spinal internal fixation system.But since pedicle screw hardness is much larger than people's centrum bone
Hardness, both under normal healthy state when contacting and having relative displacement, centrum bone can first contact surface destroy.Moreover
Surgical procedure destroys the more hard cortex bone of conical surface, exposes more soft cancellous bone, therefore actually using
Cheng Zhong, centrum bone can be than under normal healthy state, being easier quickly to destroy on the contact surface.In addition, it is postoperative due to
A variety of causes can so that the brace time is insufficient, and Interbody fusion amount is insufficient as patient wears, and act the screw load strutted
It is excessive, pedicle screw and interpyramidal opposite mobility can be increased, increases the relative displacement between the two contact surface, accelerates vertebra
The abrasion of body bone, to weaken hold of the bone for pedicle screw.In the elderly or the patient of osteoporosis, vertebral arch
The effect of root screw, is worse.
Existing hollow Pediculus arcus vertebrae screw contain be useful for bone cement by through-hole, through-hole wall and screw thread bottom diameter it
Between, form a more sharp edge.During actual operation, when being screwed into screw, the sharp side in hollow screw head
Edge meeting rotary-cut cancellous bone will be stored in the sky of hollow screw inside centrum by the cancellous bone under rotary-cut without place discharge
In heart hole, the blocking of through-hole is caused, is hindered for subsequent bone cement implantation belt.
Secondly, even if the hollow hole of hollow screw is kept unimpeded, during injecting bone cement, according to " fluid can select
Select the minimum place flowing of resistance " principle, minimum drag is the through-hole direction of straight type, therefore the hole opened on through-hole both sides, then can
There is less bone cement outflow, bone cement is caused to be concentrated mainly on screw leading portion, bone cement distribution is less in the middle part of shank of screw.If logical
The effect for crossing bone cement oneself disperse reaches that be covered with entire centrum hardly possible, because bone cement injection stage is sticky at its
Stage (dough period), itself mobility are poor.
In addition, the depth that in Clinical practice, is screwed into of pedicle screw is normally close in centrum contralateral cortex bone, therefore spiral shell
The form of nail head beginning implantation bone cement, can increase cortex bone pressure, it is possible to cortex bone be caused to be broken too early inside centrum
It is bad.
Therefore, the applicant is dedicated to providing a kind of hollow Pediculus arcus vertebrae screw for conveying bone cement and bone cement conveying
Device.
Utility model content
The purpose of this utility model be to provide it is a kind of for convey bone cement hollow Pediculus arcus vertebrae screw and bone cement conveying
Device can protect the cortex bone of centrum offside not destroyed by the internal pressure of bone cement, and the distributed effect of bone cement
More preferably.
The technical scheme that the utility model is provided is as follows：
A kind of hollow Pediculus arcus vertebrae screw for conveying bone cement includes the head of screw and shank of screw of interconnection, described
Head of screw has a through-hole, and it is that closing is tied that the shank of screw, which has a blind hole, the one end of the shank of screw far from the head of screw,
Structure, and the through-hole of the head of screw is connected to the blind hole of the shank of screw, and multiple side openings are additionally provided on the side wall of the shank of screw,
The side opening is connected to the blind hole.
Preferably, the line of the central point of the external port of multiple side openings forms a threaded line.
Preferably, multiple side openings are divided into multilayer, and the aperture of the side opening close to the blind end of the shank of screw is less than
The side opening aperture of blind end far from the shank of screw.
The invention also discloses a kind of bone cement delivery devices, including：The above-mentioned hollow vertebra for conveying bone cement
Pedicle screw；There is a through-hole, the first end of the connector to stretch to the hollow pedicle spiral shell for connector, the connector
In the head of screw of nail, and the through-hole of the connector is connected to the through-hole of the head of screw；Screw set is set in the connector
Outside hollow Pediculus arcus vertebrae screw, for fixing the connector and hollow Pediculus arcus vertebrae screw.
Preferably, the outer diameter of the first end of the head of screw of the hollow Pediculus arcus vertebrae screw is gradually reduced, the head of screw
First end is one end that the head of screw is connect with the shank of screw；The aperture of the through-hole of the first end of the screw set gradually subtracts
Small, the first end of the screw set is set in the first end of the head of screw.
Preferably, the interlude of the connector is a threaded rod, and the through-hole of the second end of the screw set is a screw thread
Hole, the interlude of the connector are threadedly coupled with the second end that the screw covers.
Preferably, the junction of the hollow Pediculus arcus vertebrae screw, the connector and screw set three is formed
Chamber, and an intermediate is equipped in the cavity, the intermediate is made by rigid material.
Preferably, the joint face between the connector and the head of screw of the hollow Pediculus arcus vertebrae screw is equipped with sealing
Circle.
Preferably, the connector is equipped with groove, and the groove is close to the second end of the connector, the connection
The second end of head with the delivery end of bone cement conveyer for connecting.
Preferably, the second end of the connector is equipped with a rapid replacing interface, and the rapid replacing interface is used to convey with bone cement
Device or surgical instrument cooperation.
A kind of hollow Pediculus arcus vertebrae screw and bone cement delivery device energy for conveying bone cement provided by the utility model
Enough bring following at least one advantageous effect：
1, the utility model for conveying the hollow Pediculus arcus vertebrae screw of bone cement when in use, bone cement is from head of screw
Through-hole enters in the blind hole of shank of screw, then is flowed out from the side opening on shank of screw, and setting in this way can ensure the bone in screw
Unimpeded unimpeded of cement path, can also protect the cortex bone of centrum offside not destroyed by the internal pressure of bone cement, may be used also
The direction for changing bone cement flowing with control, makes it be spread inside centrum along the side opening of screw bar portion, consequently facilitating bone water
Mud is full of entire centrum.
2, the hollow Pediculus arcus vertebrae screw of the utility model is by arranging side opening according to the form of threaded line, and will
Hollow Pediculus arcus vertebrae screw is set as being less than the aperture of the side opening far from blind end close to the aperture of the side opening of blind end, and setting in this way is equal
It can ensure that bone cement uniformly quickly flows out shank of screw, and be full of entire vertebra.
3, the bone cement delivery device of the utility model covers connection hollow Pediculus arcus vertebrae screw and connector by screw, in this way
Dismounting convenient for component, and good seal performance are set.
4, the bone cement delivery device of the utility model by the head of screw of hollow Pediculus arcus vertebrae screw by being directly fastened on spiral shell
In nail set, and connector is connected with screw external threading, and the dismounting of component is further convenient in setting in this way, and in connected state,
Its structural soundness is good.
5, the bone cement delivery device of the utility model by be arranged intermediate can reduce hollow Pediculus arcus vertebrae screw,
The fretting wear of connector and screw set three junction, can also reinforce the leakproofness of its junction.
6, the bone cement delivery device of the utility model is equipped with sealing in the junction of connector and hollow Pediculus arcus vertebrae screw
Circle, in this way setting further enhance the sealing structure performance of component, effectively prevent generating leakage in bone cement injection process
It flows into abdominal cavity or blood.
7, the bone cement delivery device of the utility model is equipped with groove on connector, when this groove is convenient for injection bone cement
Holding and adjusting screw angle so that bone cement distribution it is more uniform.
8, the bone cement delivery device of the utility model is equipped with rapid replacing interface on connector, is pulling out bone cement conveyer
Afterwards, which can coordinate with the rapid replacing interface of surgical instrument at once, play adjusting screw, be screwed into screw, screw out screw
Deng action, save original adjusting screw need with nail device operating procedure, be also possible to prevent change follow closely device during
The problem of bone cement is flowed out from connector.
Description of the drawings
Below by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, to the utility model for defeated
Send the hollow Pediculus arcus vertebrae screw of bone cement and above-mentioned characteristic, technical characteristic, advantage and its realization method of bone cement delivery device
It is further described.
Fig. 1 is a kind of section view of specific embodiment of the hollow Pediculus arcus vertebrae screw for conveying bone cement of the utility model
Figure；
Fig. 2 is a kind of structural schematic diagram of specific embodiment of the bone cement delivery device of the utility model；
Fig. 3 is the structural schematic diagram of bone cement delivery device shown in Fig. 2 in another direction；
Fig. 4 is the A-A sectional views of bone cement delivery device shown in Fig. 2；
Fig. 5 is the enlarged structure schematic diagram at C in bone cement delivery device shown in Fig. 4；
Fig. 6 is the B-B sectional views of bone cement delivery device shown in Fig. 3；
Drawing reference numeral explanation：
Hollow Pediculus arcus vertebrae screw 10, head of screw 11, shank of screw 12, blind hole 13, side opening 14；
Connector 20, groove 21, screw set 30, intermediate 40, sealing ring 50, rapid replacing interface 60, bone cement conveyer 70.
Specific implementation mode
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, attached drawing will be compareed below
Illustrate specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings, and obtains other embodiments.To make simplified form, only schematically showing in each figure
With the relevant part of the utility model, they do not represent its practical structures as product.
Embodiment one
As shown in Figure 1, embodiment one disclose it is a kind of for convey bone cement hollow Pediculus arcus vertebrae screw it is more preferred
Embodiment, includes the head of screw 11 and shank of screw 12 of interconnection, and there is head of screw 11 through-hole, shank of screw 12 to have a blind hole
13, the one end of shank of screw far from head of screw is enclosed construction, and the through-hole of head of screw 11 is connected to the blind hole 13 of shank of screw 12, spiral shell
Multiple side openings 14 are additionally provided on the side wall of nail rod 12, side opening 14 is connected to blind hole 13.When in use, bone cement is from head of screw 11
Through-hole is flowed into the blind hole 13 of shank of screw 12, then is flowed out from the side opening 14 of shank of screw 12, and setting in this way can ensure screw
In bone cement pathway patency it is unimpeded, the cortex bone of centrum offside can also be protected not broken by the internal pressure of bone cement
It is bad, furthermore it is also possible to the direction for changing bone cement flowing is controlled, and with faster speed, by the bone water in the sticky stage
Mud injects in centrum.
Specifically, the line of the central point of the external port of multiple side openings 14 forms a threaded line, setting can be effective in this way
Ensure that bone cement is evenly distributed Intrapyramidal.In addition, close to blind end (the i.e. shank of screw 12 shown in Fig. 1 of shank of screw 12
Lower end) the aperture of side opening be less than the side opening aperture of the blind end far from shank of screw 12.During surgery, hollow Pediculus arcus vertebrae screw
Implantation position to determine that the bone cement close to outside needs few, needed close to inside and downside bone cement it is more, therefore, setting in this way
It may further ensure that the uniformity of bone cement distribution.
It of courses, in the utility model for conveying in the hollow Pediculus arcus vertebrae screw of bone cement other specific embodiments,
The arrangement form of side opening can also have the forms such as side-by-side or staggered, and the pore size of side opening, shape can be different, herein
It repeats no more.
Embodiment two
As figures 2-6, this specific embodiment discloses a kind of more preferred embodiment of bone cement delivery device,
Including：Hollow Pediculus arcus vertebrae screw 10 disclosed in embodiment one for conveying bone cement；Connector 20, connector 20 have logical
The first end in hole, connector 20 stretches in the head of screw 11 of hollow Pediculus arcus vertebrae screw 10, and the through-hole and screw of connector 20
First 11 through-hole connection；Screw set 30, is set in outside connector 20 and hollow Pediculus arcus vertebrae screw 10, is used for 20 He of fixed connector
Hollow Pediculus arcus vertebrae screw 10.
In the present embodiment, the outer diameter of the first end of the head of screw 11 of hollow Pediculus arcus vertebrae screw 10 is gradually reduced, head of screw
11 first end is one end that head of screw 11 is connect with shank of screw 12；The aperture of the through-hole of the first end of screw set 30 gradually subtracts
Small, the first end of screw set 30 is set on head of screw 11.In assembly, it is only necessary to by the shank of screw of hollow Pediculus arcus vertebrae screw 10
One end pass through screw cover 30, until head of screw 11 be fastened on screw set 30 first end at, this assembling form it is easy to disassemble and
It is firm.
In the present embodiment, the interlude of connector 20 is a threaded rod, and the through-hole of the second end of screw set 30 is a spiral shell
The interlude of pit, connector 20 is threadedly coupled with the second end of screw set 30.In assembly, the first end of connector is stretched into
It is connected through a screw thread admittedly into the head of screw of hollow Pediculus arcus vertebrae screw 10, then by the second end that the interlude of connector and screw cover
It is fixed, connector 20 and screw set 30 had both been secured in this way, also secured hollow Pediculus arcus vertebrae screw 10 and screw set 30.
As shown in figure 5, in the present embodiment, hollow Pediculus arcus vertebrae screw 10, connector 20 and screw cover the connection of 30 threes
Place forms a cavity, and intermediate 40 is equipped in cavity, and intermediate 40 is made by rigid material.The setting of intermediate can improve
The leakproofness of the junction of hollow Pediculus arcus vertebrae screw, connector and screw set three, can also avoid junction between three
Fretting wear, in addition, the cooperation also helped between connector and hollow Pediculus arcus vertebrae screw is more firm.
As shown in figure 5, in the present embodiment, the company between the head of screw 11 of connector 20 and hollow Pediculus arcus vertebrae screw 10
Junction is equipped with sealing ring 50.The setting of sealing ring further enhances the sealing structure performance of component, effectively prevents bone water
Leakage is generated in mud injection process to flow into abdominal cavity or blood.
In the present embodiment, the connector 20 is equipped with groove 21, and the groove 21 is close to the connector 20
Second end, the second end of the connector 20 with the delivery end of bone cement conveyer 70 for connecting, this groove is convenient for injection bone
The angle of holding and adjusting screw when cement, so that bone cement distribution is more uniform.
In the present embodiment, the second end of the connector 20 is equipped with a rapid replacing interface 60, and rapid replacing interface 60 is used for and bone
Cement transportation device 70 or surgical instrument cooperation.After pulling out bone cement conveyer, the rapid replacing interface can at once with surgical instrument
Rapid replacing interface cooperation, play adjusting screw, be screwed into screw, screw out the actions such as screw, save original adjusting screw and need to use
The operating procedure of upper nail device, is also possible to prevent the problem of bone cement is flowed out from connector during changing nail device.
It of courses, in other specific embodiments of the bone cement delivery device of the utility model, screw set and hollow vertebra
The type of attachment of pedicle screw and connector can be adjusted according to actual needs；Sealing ring can be selectively arranged, when
So, it can also select that sealing ring is arranged on other joint faces；Groove and rapid replacing interface can be selectively arranged, herein not
It repeats again.
It should be noted that above-described embodiment can be freely combined as needed.The above is only the utility model
Preferred embodiment, it is noted that for those skilled in the art, do not departing from the utility model principle
Under the premise of, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of hollow Pediculus arcus vertebrae screw for conveying bone cement, it is characterised in that：
There is a through-hole, the shank of screw to have a blind hole, institute for head of screw including interconnection and shank of screw, the head of screw
It is enclosed construction to state the one end of shank of screw far from the head of screw, and the through-hole of the head of screw and the blind hole of the shank of screw connect
It is logical, multiple side openings are additionally provided on the side wall of the shank of screw, the side opening is connected to the blind hole.
2. the hollow Pediculus arcus vertebrae screw as described in claim 1 for conveying bone cement, it is characterised in that：
The line of the central point of the external port of multiple side openings forms a threaded line.
3. the hollow Pediculus arcus vertebrae screw as described in claim 1 for conveying bone cement, it is characterised in that：
Multiple side openings are divided into multilayer, and are less than far from the screw close to the aperture of the side opening of the blind end of the shank of screw
The side opening aperture of the blind end of bar.
4. a kind of bone cement delivery device, which is characterized in that including：
Hollow Pediculus arcus vertebrae screw for conveying bone cement as claimed any one in claims 1 to 3；
There is a through-hole, the first end of the connector to stretch to the hollow Pediculus arcus vertebrae screw for connector, the connector
In head of screw, and the through-hole of the connector is connected to the through-hole of the head of screw；
Screw set is set in outside the connector and hollow Pediculus arcus vertebrae screw, for fixing the connector and hollow pedicle
Screw.
5. bone cement delivery device as claimed in claim 4, it is characterised in that：
The outer diameter of the first end of the head of screw of the hollow Pediculus arcus vertebrae screw is gradually reduced, and the first end of the head of screw is described
One end that head of screw is connect with the shank of screw；
The aperture of the through-hole of the first end of the screw set is gradually reduced, and the first end of the screw set is set in the head of screw
First end on.
6. bone cement delivery device as claimed in claim 4, it is characterised in that：
The interlude of the connector is a threaded rod, and the through-hole of the second end of the screw set is a threaded hole, the connection
The interlude of head is threadedly coupled with the second end that the screw covers.
7. bone cement delivery device as claimed in claim 4, it is characterised in that：
The junction of the hollow Pediculus arcus vertebrae screw, the connector and screw set three forms a cavity, and the sky
Intracavitary is equipped with an intermediate, and the intermediate is made by rigid material.
8. bone cement delivery device as claimed in claim 4, it is characterised in that：
Joint face between the connector and the head of screw of the hollow Pediculus arcus vertebrae screw is equipped with sealing ring.
9. bone cement delivery device as claimed in claim 4, it is characterised in that：
The connector is equipped with groove, and the groove is close to the second end of the connector, the second end of the connector
For being connect with the delivery end of bone cement conveyer.
10. bone cement delivery device as claimed in claim 4, it is characterised in that：
The second end of the connector is equipped with a rapid replacing interface, and the rapid replacing interface is used for and bone cement conveyer or surgical instrument
Cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720715415.6U CN207768496U (en) | 2017-06-20 | 2017-06-20 | Hollow Pediculus arcus vertebrae screw for conveying bone cement and bone cement delivery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720715415.6U CN207768496U (en) | 2017-06-20 | 2017-06-20 | Hollow Pediculus arcus vertebrae screw for conveying bone cement and bone cement delivery device |
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| CN207768496U true CN207768496U (en) | 2018-08-28 |
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ID=63218819
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| CN201720715415.6U Active CN207768496U (en) | 2017-06-20 | 2017-06-20 | Hollow Pediculus arcus vertebrae screw for conveying bone cement and bone cement delivery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110478016A (en) * | 2019-07-30 | 2019-11-22 | 张家港市中医医院 | It is fixed in a kind of centrum to form device with spring-piece type cone cavity |
-
2017
- 2017-06-20 CN CN201720715415.6U patent/CN207768496U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110478016A (en) * | 2019-07-30 | 2019-11-22 | 张家港市中医医院 | It is fixed in a kind of centrum to form device with spring-piece type cone cavity |
| CN110478016B (en) * | 2019-07-30 | 2023-12-08 | 张家港市中医医院 | Spring piece type cone cavity forming device for fixing vertebral body |
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