CN208371876U - A kind of pedicle screw - Google Patents
A kind of pedicle screw Download PDFInfo
- Publication number
- CN208371876U CN208371876U CN201721894380.3U CN201721894380U CN208371876U CN 208371876 U CN208371876 U CN 208371876U CN 201721894380 U CN201721894380 U CN 201721894380U CN 208371876 U CN208371876 U CN 208371876U
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- CN
- China
- Prior art keywords
- nail
- perforation
- pedicle screw
- stop collar
- connecting rod
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Abstract
The utility model discloses a kind of pedicle screws, belong to backbone correcting medical appliance field, it is intended to provide a kind of pedicle screw for making pedicle screw be not easy to loosen from backbone, its key points of the technical solution are that, including nail set and U-shaped nail tail, nail set axial direction is equipped with perforation, and nail tail, which is equipped with, is equipped with the first internal screw thread with limit hole that is coaxial and being connected to perforation of perforating, the inner sidewall of limit hole；Nail, which is put on, is equipped with the expansion slot parallel with the axis of nail set, axisymmetrical setting of the expansion slot about nail set；Stop collar is equipped in limit hole, stop collar is equipped with the first external screw thread with the first screw-internal thread fit, and stop collar is equipped with connecting rod, and is fixedly connected with rivet nut by guide portion；The limiting section matched with guide portion is equipped in perforation.Using limiting section, guide portion and dilatation joint, limiting section struts dilatation joint during guide portion is mobile so that nail set is connected in the threaded hole for nail set installation, thus when pedicle screw be not easy to loosen.
Description
Technical field
The utility model relates to a kind of backbone correcting medical appliance, in particular to a kind of pedicle screw.
Background technique
Spine nail stick internal fixation system is a kind of highly developed spinal surgery hand in terms for the treatment of spinal injury and disease
Art has been widely used and has carried out the reset and fixation of bone.Usually the fasteners such as pedicle screw, hook are implanted into and are consolidated with centrum
It is fixed, it is connected, then fixed with holding screw, is played a supportive role by pitman.When boring pedicle screw implantation, with centrum cross
The crosspoint of the convex lateral border of horizontal line and upper joint of paving is entry point, drills through cortex using hole making drill, chooses suitable limit
Brill drills out screw way, and keeps appropriate angle with centrum coronal-plane and sagittal plane, is twisted screw along screw way direction using upper nail device
Enter, then carries out the surgical procedures such as the placement of subsequent pitman, locking.
The Chinese patent that notification number is CN201551382U discloses a kind of pedicle screw, including nail tail and rivet nut, nail
Tail is equipped with spherical mortar cup, and spherical mortar body is equipped in the rear end of rivet nut, and mortar body is placed in mortar cup and the two is slidably matched,
The limiting section limited to rivet nut is equipped in the front end of nail tail.
Although this pedicle screw rivet nut can make small movement relative to nail tail, have the vertebra of operative site
There is preferable physiological function, but when rivet nut small movements, rivet nut generates active force to vertebra, so that being screwed on vertebra for screw
Threaded hole be stretched so that connection loosen, cause screw to fall off from threaded hole.
Utility model content
The purpose of the utility model is to provide a kind of pedicle screws, and having makes pedicle screw be not easy to loosen from backbone
Effect.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of pedicle screw, including nail set, the U-shaped nail tail being connect with nail set upper side integral type and rivet nut, the nail set
Axial direction is equipped with perforation, and the nail tail is equipped with limit hole that is coaxial with perforation and being connected to perforation, and the internal diameter of the perforation is small
The first internal screw thread is equipped in the inner sidewall of the internal diameter of limit hole, the limit hole；
The nail set is equipped with expansion slot on the outside of one end far from nail tail, and the expansion slot is set about the axisymmetrical of nail set
It sets, the expansion slot is parallel with the axis direction of nail set；
Stop collar is equipped in the limit hole, the lateral wall of the stop collar is equipped with first with the first screw-internal thread fit
External screw thread is fixedly connected with connecting rod on the stop collar, and the connecting rod is located in perforation, and the connecting rod is far from stop collar
One end on the outside of be equipped with fixation hole, the axis direction of the fixation hole and the axis direction of connecting rod are vertical；
The limiting section that described one end far from limit hole of perforating is recessed inwardly equipped with vertical section shape for taper；
The rivet nut is equipped with the slot being inserted into for connecting rod, and the outside of the slot is drawn equipped with what is be adapted to limiting section
Lead portion, the outside of the connecting rod is equipped with the axis direction location hole vertical with socket axis direction, the location hole it is interior
Diameter is equal with the internal diameter of fixation hole, and the positioning hole is equipped with pin.
By using above-mentioned technical proposal, pedicle screw is worn from perforation before use, penetrating rivet nut from limit hole
Out.Nail tail is turned, makes the screw-internal thread fit on the first external screw thread and limit hole on stop collar, and drive nail tail to rivet nut direction
Mobile, guide portion is embedded into limiting section in moving process, and expansion slot is opened, so that nail set is stuck in the screw thread for nail set connection
Kong Zhong makes pedicle screw be not easy to loosen from backbone.
Further, the upper surface of the stop collar, which is recessed inwardly, interior hex slot.
By using above-mentioned technical proposal, when rivet nut is installed in nail set, it is aligned with the installation tool of interior hex slot adaptation
Interior hex slot, and it is screwed down moving nail body, it connect rivet nut with nail external threading, avoids manpower from contacting rivet nut directly to turn, improve
Health when operation.
Further, the vertical section shape of the guide portion is taper.
By using above-mentioned technical proposal, the guide portion accurate positioning of taper during nail tail is turned downwards, is limited
Portion moves down and contacts with guide portion, and limiting section continues during moving down, and the guide portion of taper struts expansion slot,
And with the movement of limiting section, the distracted distance of expansion slot is become larger, and can be adjusted to appropriately distance as needed, so that
Nail set is stuck in the threaded hole for nail set connection, and pedicle screw is made to be not easy to loosen.
Further, the screw pitch of the nail set is greater than the screw pitch of rivet nut.
By using above-mentioned technical proposal, pedicle screw in use, the biggish rivet nut of screw pitch to be screwed into bone density big
In cancellous bone, screw pitch lesser nail set is screwed into the small cortex bone of bone density, reduces osteoporosis, improves screw and backbone
Bonding strength.
Further, there are two the U-shaped faces being parallel to each other for recess on the nail tail.
By using above-mentioned technical proposal, certain effect of contraction is played in U-shaped face, and slot bottom can be for centrum orthomorphia
Pitman is put into, so that pitman is not easy that the accurate positioning of operation is shaken and influenced in U-type groove.
Further, the second internal screw thread being provided in the nail tail above stop collar.
By using above-mentioned technical proposal, after pitman is placed in U-type groove, plug screw is screwed into second with plug screw device is held
In internal screw thread, so that plug screw contacts with pitman and fixes pitman, keep pitman not easily shifted.
Further, being recessed inwardly on the nail tail, there are two the circular mounting slots adjacent with U-type groove.
By using above-mentioned technical proposal, after stud is threaded into screw way using upper nail device, mounting groove can be with folder
Clencher cooperation fixes its own, so that being not easy to cause the position of entire screw because of maloperation when being put into pitman
Deviation, while the direct contact screw tail of manpower is avoided, it ensure that health when operation.
In conclusion the utility model has the following beneficial effects:
1. using limiting section, guide portion and dilatation joint, limiting section supports dilatation joint during guide portion is mobile
Open so that nail set be connected to for nail set installation threaded hole in, thus when pedicle screw be not easy to loosen；
2. U-type groove is used, so that the pitman being placed in U-type groove be made to be not easy to shake in U-type groove and influence to perform the operation
Accurate positioning；
3. using mounting groove, it is fixed to facilitate with installation tool come clamped spiked tail, improves health when operation.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the present embodiment；
Fig. 2 is in embodiment for embodying the structural schematic diagram of nail set；
Fig. 3 is in embodiment for embodying the connection relationship diagram of stop collar, connecting rod and rivet nut.
In figure, 1, nail set；11, it perforates；111, limiting section；12, expansion slot；2, tail is followed closely；21, limit hole；211, in first
Screw thread；22, stop collar；221, the first external screw thread；222, interior hex slot, 223, fixation hole；23, connecting rod；24, guide portion；25,
Rivet nut；251, slot；252, location hole；253, pin；26, the second internal screw thread；27, U-type groove；28, mounting groove.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Wherein identical components are presented with like reference characters.It should be noted that word used in the following description
Language "front", "rear", "left", "right", "up" and "down" refer to the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and
"outside" refers respectively to the direction towards or away from geometric center of specific component.
A kind of pedicle screw, as shown in Figure 1, including nail set 1, U-shaped nail tail 2 and rivet nut 25, nail tail 2 is that a top is spacious
The hollow pipe sleeve opened, and its bottom end is connected with nail set 1.Axis direction on nail tail 2 about nail set 1 is symmetrically arranged with U-type groove
27, U-type groove 27 is used to place pitman, realizes the relatively fixed of pitman and the pedicle screw turned, and then spinal fixation
Shape.
As shown in Figure 1, being symmetrically recessed on nail set 1, there are two circular mounting grooves 28, and mounting groove 28 and 27 phase of U-type groove
It is adjacent.With the installation tool of pedicle screw come the mounting groove 28 of clamping nail 2 two sides of tail, realizes the fixation of nail tail 2, avoid manpower straight
Nail tail 2 is touched in contact, improves health when operation.
As shown in Figure 1, nail 2 inner wall of tail is equipped with the second internal screw thread 26.Pitman is placed in U-type groove 27, lock is passed through
Pitman is fixed in U-type groove 27 by the threaded connection of tight plug screw and the second internal screw thread 26, is reduced pitman and is moved in U-type groove 27
It is dynamic.
As shown in Fig. 2, nail 1 axial direction of set is equipped with perforation 11, nail tail 2 is equipped with coaxial with perforation 11 and is connected to perforation 11
Limit hole 21, the internal diameter of limit hole 21 is greater than the internal diameter of perforation 11, and the inner sidewall of limit hole 21 is equipped with spiral shell in first
Line 211.Nail set is equipped with the expansion slot 12(parallel with nail 1 axis of set referring to Fig. 1 on the outside of 1 one end far from nail tail 2), and expand
Slot 12 is about nail set 1 axisymmetrical setting.
As shown in Figures 2 and 3, be equipped with stop collar 22 in limit hole 21, the lateral wall of stop collar 22 be equipped with first in
The first external screw thread 221 that screw thread 211 cooperates.Connecting rod 23 is fixedly connected on stop collar 22, connecting rod 23 is far from stop collar 22
One end through there is fixation hole 223, the axis direction of fixation hole 223 is vertical with the axis direction of connecting rod 23.
As shown in Figures 2 and 3, it is taper that 11 one end far from limit hole 21 of perforation, which are recessed inwardly equipped with vertical section shape,
Limiting section 111.Rivet nut 25 is equipped with the guide portion 24 cooperated with limiting section 11.It is set on one end where the guide portion 24 of rivet nut 25
There is the slot 251 being inserted into for connecting rod 23, rivet nut 25, which is equipped with, runs through slot 251, and axis direction and 251 axis direction of slot
The internal diameter of vertical location hole 252, location hole 252 is equal with the internal diameter of fixation hole 223.It is equipped in location hole 252 for connecting
The pin 253 of rivet nut 25 and connecting rod 23.Pedicle screw from limit hole 21 before use, first penetrate connecting rod 23, from wearing
It is pierced by hole 11.Connecting rod 23 is pierced by the part of perforation 11 into insertion slot 251, at this point, guide portion 24 is embedded into limiting section
In 111, rivet nut 25 and connecting rod 23 are secured together with pin 253.Nail tail 2 is turned, the first outer spiral shell on stop collar 22 is made
Screw-internal thread fit on line 221 and limit hole 21, and drive nail tail 2 mobile to 25 direction of rivet nut, guide portion 24 in moving process
Continue to be embedded into limiting section 111, by expansion slot 12(referring to Fig. 1) it struts, so that nail set 1 is stuck in screw way, make pedicle of vertebral arch screw
Nail is not easy to loosen from screw way.
As shown in figure 3, stop collar 22 is equipped with interior hex slot 222 far from one end of connecting rod 23.Rivet nut 25 is installed to nail set 1
When middle, installation tool is directed at interior hex slot 222, and is screwed down moving nail body 25, is threadedly coupled rivet nut 25 with nail set 1, avoids people
Hand contacts rivet nut 25 directly to turn, and improves health when operation.
As shown in Figure 1, the screw pitch of nail set 1 is greater than the screw pitch of rivet nut 25.Pedicle screw is in use, the more roomy nail of screw pitch
Body 25 is screwed into the big cancellous bone of bone density, and the lesser nail set 1 of screw pitch is screwed into the small cortex bone of bone density.
Specific embodiment: a kind of pedicle screw on backbone before use, drill out screw way, in installation tool alignment six
Connecting rod 23 is screwed into nail set 1 by chamfered groove 222.Connecting rod 23 is pierced by the part of perforation 11 into insertion slot 251, at this point,
Guide portion 24 is embedded into limiting section 111, then is secured together rivet nut 25 and connecting rod 23 with pin 253.In use, will peace
Holding tool clamps the mounting groove 28 of clamping nail 2 two sides of tail, inserts screws into screw way.After screw-driving, nail tail 2 is rotated backward,
So that nail tail 2 is mobile to 25 direction of rivet nut, so that it is embedded into the guide portion 24 in rivet nut 25 in the limiting section 111 in nail set 1,
It is softened the expansion slot 12 on nail set 1 to be stuck in screw way, increases nail set 1 in the holding power of cortex bone, reduce pedicle of vertebral arch screw
Nail falls off from screw way.Finally pitman is put into the U-type groove 27 of nail tail 2 with holding stick pincers, with holding plug screw device for locking screw
Plug is screwed into the second internal screw thread 26 at nail tail 2, and pitman is tightened fixation, keeps pitman not easily shifted.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (7)
1. a kind of pedicle screw, it is characterized in that: including the U-shaped nail tail (2) that nail covers (1), connect with nail set (1) upper end integral type
With rivet nut (25), nail set (1) axial direction is equipped with perforation (11), the nail tail (2) equipped with it is coaxial with perforation (11) and with
The internal diameter of the limit hole (21) of perforation (11) connection, the perforation (11) is less than the internal diameter of limit hole (21), the limit hole
(21) inner sidewall is equipped with the first internal screw thread (211)；
Expansion slot (12) are equipped on the outside of the described one end of nail set (1) far from nail tail (2), the expansion slot (12) covers (1) about nail
Axisymmetrical setting, the expansion slot (12) with nail cover the axis direction of (1) it is parallel；
Stop collar (22) are equipped in the limit hole (21), the lateral wall of the stop collar (22) is equipped with and the first internal screw thread
(211) the first external screw thread (221) cooperated is fixedly connected with connecting rod (23), the connecting rod on the stop collar (22)
(23) it is located in perforation (11), the connecting rod (23) is equipped with fixation hole (223) far from one end outside of stop collar (22), institute
The axis direction for stating fixation hole (223) is vertical with the axis direction of connecting rod (23)；
The limiting section that the perforation (11) is recessed inwardly far from the one end of limit hole (21) equipped with vertical section shape for taper
(111)；
The rivet nut (25) is equipped with the slot (251) that be inserted into for connecting rod (23), the outside of the slot (251) equipped with
The outside of the guide portion (24) of limiting section (111) adaptation, the connecting rod (23) is equipped with axis direction and slot (251) axis
The internal diameter of the vertical location hole in direction (252), the location hole (252) is equal with the internal diameter of fixation hole (223), the location hole
(252) pin (253) are equipped in.
2. a kind of pedicle screw according to claim 1, it is characterized in that: the upper surface of the stop collar (22) concaves
Falling into has interior hex slot (222).
3. a kind of pedicle screw according to claim 2, it is characterized in that: the vertical section shape of the guide portion (24) is
Taper.
4. a kind of pedicle screw according to claim 3, it is characterized in that: the screw pitch of the nail set (1) is greater than rivet nut
(25) screw pitch.
5. a kind of pedicle screw according to claim 1 is located at limit it is characterized in that: being provided in the nail tail (2)
The second internal screw thread (26) above ring (22).
6. a kind of pedicle screw according to claim 5, it is characterized in that: there are two phases for the upper recess of nail tail (2)
Mutually parallel U-type groove (27).
7. a kind of pedicle screw according to claim 6, it is characterized in that: there are two being recessed inwardly on the nail tail (2)
The mounting groove (28) adjacent with U-type groove (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721894380.3U CN208371876U (en) | 2017-12-28 | 2017-12-28 | A kind of pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721894380.3U CN208371876U (en) | 2017-12-28 | 2017-12-28 | A kind of pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208371876U true CN208371876U (en) | 2019-01-15 |
Family
ID=64978204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721894380.3U Active CN208371876U (en) | 2017-12-28 | 2017-12-28 | A kind of pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208371876U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111839701A (en) * | 2020-07-13 | 2020-10-30 | 北京市春立正达医疗器械股份有限公司 | Novel pedicle screw and implantation method thereof |
-
2017
- 2017-12-28 CN CN201721894380.3U patent/CN208371876U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111839701A (en) * | 2020-07-13 | 2020-10-30 | 北京市春立正达医疗器械股份有限公司 | Novel pedicle screw and implantation method thereof |
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