CN207804360U - A kind of interlocking formula pedicle screw system - Google Patents
A kind of interlocking formula pedicle screw system Download PDFInfo
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- CN207804360U CN207804360U CN201720697676.XU CN201720697676U CN207804360U CN 207804360 U CN207804360 U CN 207804360U CN 201720697676 U CN201720697676 U CN 201720697676U CN 207804360 U CN207804360 U CN 207804360U
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- lockhole
- axis
- pinning
- pedicle screw
- interlocking formula
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Abstract
The utility model discloses a kind of interlocking formula pedicle screw systems, including interlocking formula pedicle screw and sighting device；Interlocking formula pedicle screw includes main nail and pinning, and main nail on is machined with lockhole, pinning is accurately placed in the lockhole of main nail by sighting device.Main nail passes through cross lock by pinning, to enhance the resisting pull out forces and stability of main nail.Severe osteoporosis vertebra is fixed in the structure of the utility model, and the resisting pull out forces with two pieces of screws, pinning enters cortex of bone channel, and resisting pull out forces are stronger, and two pieces of mutual interlockings of screw form one, form stable interior fixed structure.
Description
Technical field
The utility model belongs to field of medical device, and in particular to a kind of interlocking formula pedicle screw system.
Background technology
Pedicle screw fixation operation is widely used lumbar vertebrae internal fixation method, but traditional pedicle screw at present
Technology relies primarily on cancellous bone and the holding effect of screw is fixed, under its pullout of strength is apparent in osteoporosis case
Drop, fixing intensity decline, and fixed mortality increases.Cancellous bone is the important of measurement screw fixing intensity to the holding effect of screw
Index, with the gerontal patient of the degenerative diseases of lumbar vertebrae of osteoporosis, need more powerful inner stationary shaft to withdrawal force and
Stability maintains postoperative spinal stabilization.
Mostly increase screw hold and stabilization by improveing the modes such as screw thread design, length and diameter change at present
Property.Such as expanding screw for pedicle of vertebral arch, double os integumentale screws etc., but patients with severe osteoporosis is still difficult to obtain effective
Spiral shell-nail hold and stability, this is that characteristic of the conventional pedicle screws merging channel based on cancellous bone determines.
Invention content
For the defect and deficiency of existing technology of preparing, the purpose of this utility model is to provide a kind of interlocking formula pedicle of vertebral arch screw
Nail system solves the problems, such as that pedicle screw pullout of strength and stability are poor in the prior art.
To achieve the goals above, the utility model adopts the following technical solution is achieved：
A kind of interlocking formula pedicle screw system, including interlocking formula pedicle screw and sighting device；
The interlocking formula pedicle screw includes main nail and pinning, and the main nail includes crown and rivet nut, described
It can mutually be rotated between crown and rivet nut, groove is equipped at the top of the rivet nut；
The rivet nut be equipped with the second screw thread, the rivet nut be equipped with lockhole, the pinning be placed in lockhole with
Main nail forms interlocking formula structure；
The sighting device is connected in crown, and the sighting device is equipped with through-hole, the axis and lock of the through-hole
The axis in hole overlaps, and makes pinning that can be moved in lockhole along the axis direction where through-hole.
The utility model also has following distinguishing feature：
The sighting device includes connecting rod, aims at arm, sleeve and guide cylinder；One end of the connecting rod and aiming arm
One end connection, the other end of the connecting rod is equipped with protrusion, and the convex shape is matched with groove shapes, and described takes aim at
The other end of quasi- arm is equipped with through-hole, and the axis of the through-hole overlaps with the axis of lockhole, when the protrusion in connecting rod be placed in it is recessed
When in slot, the axis of through-hole aimed on arm is overlapped with the axis of lockhole；
The sleeve is socketed in connecting rod, and the sleeve can be slided up and down along connecting rod, the barrel end
It is connect with crown；
The guiding is placed in through-hole, and the axis of guide sleeve is overlapped with the axis of through-hole, the guide sleeve it is interior
Bore dia can guarantee that pinning is seamless and slide through and enter in lockhole.
The protrusion is in irregular polygon structure, and the groove is also irregular polygon, the protrusion
Shape is matched with the shape of groove.
The protrusion is hexagon shape, and hexagon protrusion wherein outwardly protrudes to form limited block on one side；Institute
The groove stated is hexagon shape, and the hexagonal indentations wherein outwardly protrude to form limiting slot on one side, the limited block
It is matched with limiting slot.
The center line of the limited block and the axis of lockhole are in the same plane.
The pinning includes first end and second end, and the diameter of the second end is more than the diameter of first end, described
The first end of pinning can pass through lockhole, second end rest on outside lockhole.
The pinning at least one end is equipped with screw thread.
The pinning includes the smooth bar part of the 4th screw thread at both ends, the 5th screw thread and centre, the 4th spiral shell
Line and smooth bar part form the first end, and the 5th screw thread is second end.
The axis of the lockhole intersects with the axis of rivet nut, and the angle of the axis of lockhole and the axis of rivet nut is 20 °~
45°。
The crown is equipped with broken tail end, and the shape of the tail end is identical as the shape of crown.
Compared with prior art, the utility model has the beneficial effects that：
(1) severe osteoporosis vertebra is fixed in the interlocking formula vertebral pedicle bolt structure of the utility model, has
The resisting pull out forces of two pieces of screws, pinning enter cortex of bone channel, and resisting pull out forces are stronger, and two pieces of mutual interlockings of screw are formed
One, forms stable interior fixed structure.
(2) the pinning merging master that the sighting device of the utility model can be in the accurate agonic formula pedicle screw by interlocking
It in the lockhole of nail, effectively avoids the deviation generated in pinning fixation procedure and delays fixation procedure, and then body is generated not
Profit influences.
(3) the interlocking formula pedicle screw of the utility model and the connecting interface of sighting device can guarantee that pinning is accurately placed in
In lockhole.
(4) overall structure of the interlocking formula pedicle screw system of the utility model is ensureing that pinning can accurately and vertebra
Under the premise of pedicle screw forms interlocking formula structure, the resisting pull out forces of pedicle screw are improved, fixed structure is made more to stablize.
Description of the drawings
Fig. 1 is the structure chart of the utility model.
Fig. 2 is the structure chart of the interlocking pedicle screw of the utility model.
Fig. 3 is the structure chart of the sighting device of the utility model.
Fig. 4 is the structure chart of the sighting device and pedicle screw connector of the utility model.
The meaning of each label in attached drawing：
(1-1)-main nail, (1-2)-pinning；
(1-1-1)-crown, (1-1-2)-rivet nut, (1-1-3)-the first screw thread, (1-1-4)-groove, (1-1-5)-the second
Screw thread, (1-1-6)-lockhole, (1-1-7)-U-type groove, (1-1-8)-tail end, (1-1-9)-universal adjustment head；(1-1-4-1)-is limited
Position slot；
(1-2-1)-the four screw thread, (1-2-2)-the five screw thread, (1-2-3)-smooth bar part；
(2-1)-connecting rod, (2-2)-aim at arm, (2-3)-sleeve, (2-4)-guide cylinder；
(2-1-1)-protrusion, (2-1-1-1)-limited block, (2-2-1)-through-hole, (2-3-1)-third screw thread.
Explanation is further explained in detail to the particular content of the utility model with reference to embodiments.
Specific implementation mode
The interlocking formula pedicle screw system of the utility model includes interlocking formula pedicle screw and sighting device, wherein is handed over
Locking-type pedicle screw includes main nail 1-1 and pinning 1-2, and main nail has crown 1-1-1 and rivet nut 1-1-2, and crown 1-1-1 can
Around rivet nut 1-1-2 rotations and angulation (i.e. multi-axial screws), pinning installation direction and the connection in crown U-type groove are reached with this
The purpose that the installation direction of stick does not restrain mutually.
The rivet nut of the utility model is equipped with lockhole 1-1-6, for placing pinning 1-2, pinning surface can all polished rods,
Generally in order to increase the resisting pull out forces of pinning, it is equipped with screw thread in the one or both ends of pinning,
Preferably, the head end of pinning is equipped with the 4th screw thread 1-2-1, and tail end is equipped with the 5th screw thread 1-2-2, and centre is polished rod portion
Divide 1-2-3, pinning tail end diameter to be more than stage casing smooth bar part and head end diameter, can guarantee that the small end of pinning passes through lockhole in this way,
The big end of pinning is without pass through lockhole, therefore design diameter is more greatly, enhances screw intensity, prevents from being broken；Position among pinning
In lockhole, it is set to smooth bar part, can guarantee the intensity of pinning in this way.
The sighting device of the utility model is connected on crown 1-1-1, and sighting device is equipped with through-hole 2-2-1, the axis of through-hole
It is overlapped with the axis of lockhole 1-1-6, makes pinning 1-2 that can be moved in lockhole along the axis direction where through-hole.
Specifically, the sighting device includes connecting rod 2-1, aims at arm 2-2, sleeve 2-3 and guide cylinder 2-4；Connecting rod
Connect L-shaped with arm is aimed at, connecting rod one end is equipped with protrusion 2-1-1, and rivet nut top is equipped with groove 1-1-4, convex shape
It matches with the groove shapes at the top of rivet nut, when in the groove at the top of projection portion is stably mounted to rivet nut, aims on arm
The axis of inclined via-hole 2-2-1, the axis of guide sleeve 2-4, lockhole 1-1-6 axis three overlap；
Sleeve 2-3 is socketed in connecting rod, and sleeve can be slided up and down along connecting rod, and barrel end is connect with crown 1-1-1,
It generally is equipped with third screw thread 2-3-1 in barrel end, the first screw thread 1-1-3 is correspondingly arranged on crown inner wall, works as connecting rod
When 2-1 is placed in crown, it is rotated down sleeve and has connect fixed work with the first screw thread 1-1-3 inside crown by third screw thread
With.
The diameter of bore of the guide sleeve of the utility model is more than the maximum gauge of pinning, can guarantee that pinning can be in guide sleeve
It is interior seamless to slide through and into lockhole.
The crown opening of the utility model is equipped with U-type groove 1-1-7, and U-type groove is for installing pitman.
The crown of the utility model is equipped with broken tail end 1-1-8, and broken tail end plays the role of extending crown, play
It is reliably fixed sighting device, keeps aiming more accurate, and is conducive to the installation of pitman.
Specific embodiment of the utility model is given below, it should be noted that the utility model is not limited to following tool
Body embodiment, all equivalent transformations made on the basis of the technical solutions of the present application each fall within the scope of protection of the utility model.
Embodiment 1
As shown in Figures 1 to 4, the present embodiment provides a kind of interlocking formula pedicle screw system, including interlocking formula pedicle of vertebral arch
Screw and sighting device；
Interlocking formula pedicle screw includes main nail 1-1 and pinning 1-2, main nail 1-1 include crown 1-1-1 and rivet nut 1-1-2,
For crown 1-1-1 in hollow cylindric, crown 1-1-1 openings are equipped with U-type groove 1-1-7.Crown 1-1-1 and rivet nut 1-1-2 it
Between by the 1-1-9 connections of universal adjustment head, universal adjustment head 1-1-9 and crown 1-1-1 is in integrated design, in crown 1-1-1
Wall is equipped with the first screw thread 1-1-3, and crown bottom is equipped with groove 1-1-4, and groove extends to rivet nut top from crown bottom；
Rivet nut 1-1-2 is equipped with the second screw thread 1-1-5, and rivet nut 1-1-1 is equipped with lockhole 1-1-6, and pinning 1-2 is placed in lockhole
In 1-1-6 interlocking formula structure is formed with main nail 1-1；
Pinning 1-2 includes the smooth bar part 1-2-3 of the 4th screw thread 1-2-1, the 5th screw thread 1-2-2 and centre at both ends,
4th screw thread 1-2-1 and smooth bar part 1-2-3 forms first end, and the 5th screw thread 1-2-2 is second end.The first end of pinning can be worn
Lockhole 1-1-6 is crossed, second end rests on outside lockhole.The axis of lockhole 1-1-6 intersects with the axis of rivet nut 1-1-2, the axis of lockhole
The angle of line and the axis of rivet nut is 26 ± 5 °.
Sighting device includes connecting rod 2-1, aims at arm 2-2, sleeve 2-3 and guide cylinder 2-4；One end of connecting rod 2-1 with take aim at
One end connection of quasi- arm 2-2 is L-shaped, and the other end of connecting rod 2-1 is equipped with protrusion 2-1-1, raised 2-1-1 shapes and groove 1-1-
4 shapes match, and the other end for aiming at arm 2-2 is equipped with through-hole 2-2-1, the axis of through-hole 2-2-1 and the axis weight of lockhole 1-1-6
It closes, when the raised 2-1-1 in connecting rod is placed in groove 1-1-4, aims at the axis and lockhole 1-1- of the through-hole 2-2-1 on arm
6 axis overlaps；
Raised 2-1-1 is hexagon shape, and hexagon protrusion wherein outwardly protrudes to form limited block 2-1-1-1 on one side；It is recessed
Slot 1-1-4 is hexagon shape, and hexagonal indentations wherein outwardly protrude to form limiting slot 1-1-4-1 on one side, limited block 2-1-1-1
It is matched with limiting slot 1-1-4-1.The center line of limited block 2-1-1-1 and the axis of lockhole 1-1-6 are in the same plane.
Sleeve 2-3 is socketed on connecting rod 2-1, and sleeve 2-3 can be slided up and down along connecting rod 2-2, and the end of sleeve is equipped with
Third screw thread 2-3-1, third screw thread 2-3-1 are matched with the first screw thread 1-1-3 inside crown；
Guide sleeve 2-4 is placed in through-hole 2-2-1, and the axis of guide sleeve 2-4 is overlapped with the axis of through-hole, guide sleeve 2-4's
Diameter of bore can guarantee that pinning 2-1 is seamless and slide through and enter in lockhole 1-1-6.
Another technical solution and embodiment 1 difference lies in：Crown 1-1-1 is equipped with broken tail end 1-1-8, tail end
The shape of 1-1-8 is identical as the shape of crown 1-1-1.
The course of work of the utility model：
When the interlocking pedicle screw of the utility model is fixed, main nail 1-1, the edges sleeve 2-3 of sighting device are placed in lumbar vertebrae
Sliding on connecting rod 2-1, the special connection bump 2-1-1 of connecting rod 2-1 head ends matches company with the groove 1-1-4 at the top of rivet nut 1-1-2
It connects, keeps the axis of oblique through hole 2-2-1 Chong Die with the axis of lockhole 1-1-6, downslide outer sleeve 2-3 simultaneously rotates, by sleeve
Third screw thread 2-3-1 and the internal thread of crown 1-1-1 are connected and fixed, and guide cylinder 2-4 is inserted into the through-hole 2-2-1 for aiming at arm 2-2
In, until guide cylinder 2-4 head ends are put into the inner cavities guide cylinder 2-4 as close possible to lockhole 1-1-6, by pinning 1-2, with the tightened nail of bottle opener
1-2 passes through sclerotin to be stayed in lockhole 1-1-6 to across lockhole 1-1-6, the smooth bar part 1-2-3 of pinning 1-2.It removes and aims at
Device, main nail 1-1 pass through cross lock by pinning 1-2, to enhance the resisting pull out forces and stability of main nail 1-1.
Claims (10)
1. a kind of interlocking formula pedicle screw system, it is characterised in that：Including interlocking formula pedicle screw and sighting device；
The interlocking formula pedicle screw includes main nail (1-1) and pinning (1-2), and the main nail (1-1) includes crown (1-
It 1-1) with rivet nut (1-1-2), can mutually be rotated between the crown (1-1-1) and rivet nut (1-1-2), at the top of the rivet nut
Equipped with groove (1-1-4)；
The rivet nut (1-1-2) is equipped with the second screw thread (1-1-5), and the rivet nut (1-1-1) is equipped with lockhole (1-1-
6), the pinning (1-2) is placed in lockhole (1-1-6) forms interlocking formula structure with main nail (1-1)；
The sighting device is connected in crown (1-1-1), and the sighting device is equipped with through-hole (2-2-1), the through-hole
The axis of (2-2-1) is overlapped with the axis of lockhole (1-1-6), makes pinning (1-2) can be along the axis direction where through-hole (2-2-1)
It is moved in lockhole (1-1-6).
2. interlocking formula pedicle screw system as described in claim 1, it is characterised in that：The sighting device includes connecting rod
(2-1), arm (2-2), sleeve (2-3) and guide cylinder (2-4) are aimed at；One end of the connecting rod (2-1) and aiming arm (2-2)
One end connection, the other end of the connecting rod (2-1) is equipped with raised (2-1-1), the protrusion (2-1-1) shape with it is recessed
Slot (1-1-4) shape matches, and the other end of the aiming arm (2-2) is equipped with through-hole (2-2-1), the through-hole (2-2-1)
Axis overlapped with the axis of lockhole (1-1-6), when the protrusion (2-1-1) in connecting rod is placed in groove (1-1-4), aim at
The axis of through-hole (2-2-1) on arm is overlapped with the axis of lockhole (1-1-6)；
The sleeve (2-3) is socketed in connecting rod (2-1), and the sleeve (2-3) can glide in connecting rod (2-2)
Dynamic, the sleeve end (2-3) is connect with crown (1-1-1)；
The guide sleeve (2-4) is placed in through-hole (2-2-1), the axis weight of the axis and through-hole (2-2-1) of guide sleeve (2-4)
It closes, the diameter of bore of the guide sleeve (2-4) can guarantee that pinning (2-1) is seamless and slide through and enter lockhole (1-1-6)
In.
3. interlocking formula pedicle screw system as claimed in claim 2, it is characterised in that：The protrusion (2-1-1) is not in
Regular polygon structure, the groove (1-1-4) are also irregular polygon, the shape of the shape and groove of the protrusion
Matching.
4. interlocking formula pedicle screw system as claimed in claim 3, it is characterised in that：The protrusion (2-1-1) is six
Side shape, hexagon protrusion wherein outwardly protrude to form limited block (2-1-1-1) on one side；Groove (the 1-1-
4) it is hexagon shape, the hexagonal indentations wherein outwardly protrude to form limiting slot (1-1-4-1), the limit on one side
Block (2-1-1-1) is matched with limiting slot (1-1-4-1).
5. interlocking formula pedicle screw system as claimed in claim 4, it is characterised in that：The limited block (2-1-1-1)
Center line and lockhole (1-1-6) axis it is in the same plane.
6. interlocking formula pedicle screw system as described in claim 1, it is characterised in that：The pinning (1-2) includes the
One end and second end, the diameter of the second end are more than the diameter of first end, and the first end of the pinning can pass through lockhole
(1-1-6), second end rests on outside lockhole.
7. interlocking formula pedicle screw system as claimed in claim 6, it is characterised in that：The pinning (1-2) at least one
End is equipped with screw thread.
8. interlocking formula pedicle screw system as claimed in claim 7, it is characterised in that：The pinning (1-2) includes two
4th screw thread (1-2-1) of end, the smooth bar part (1-2-3) of the 5th screw thread (1-2-2) and centre, the 4th screw thread
(1-2-1) and smooth bar part (1-2-3) form the first end, and the 5th screw thread (1-2-2) is second end.
9. interlocking formula pedicle screw system as described in claim 1, it is characterised in that：The axis of the lockhole (1-1-6)
Line intersects with the axis of rivet nut (1-1-2), and the angle of the axis of lockhole and the axis of rivet nut is 20 °~45 °.
10. the interlocking formula pedicle screw system as described in claim 1 to 9 any claim, it is characterised in that：Described
Crown (1-1-1) is equipped with broken tail end (1-1-8), the shape of the shape and crown (1-1-1) of the tail end (1-1-8)
It is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720697676.XU CN207804360U (en) | 2017-06-15 | 2017-06-15 | A kind of interlocking formula pedicle screw system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720697676.XU CN207804360U (en) | 2017-06-15 | 2017-06-15 | A kind of interlocking formula pedicle screw system |
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| Publication Number | Publication Date |
|---|---|
| CN207804360U true CN207804360U (en) | 2018-09-04 |
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ID=63336686
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720697676.XU Active CN207804360U (en) | 2017-06-15 | 2017-06-15 | A kind of interlocking formula pedicle screw system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174326A (en) * | 2017-06-15 | 2017-09-19 | 邹伟 | A kind of interlocking formula pedicle screw system |
-
2017
- 2017-06-15 CN CN201720697676.XU patent/CN207804360U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174326A (en) * | 2017-06-15 | 2017-09-19 | 邹伟 | A kind of interlocking formula pedicle screw system |
| CN107174326B (en) * | 2017-06-15 | 2023-12-12 | 邹伟 | Interlocking pedicle screw system |
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