CN207912751U - A kind of interface structure of interlocking formula pedicle screw system - Google Patents
A kind of interface structure of interlocking formula pedicle screw system Download PDFInfo
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- CN207912751U CN207912751U CN201720699631.6U CN201720699631U CN207912751U CN 207912751 U CN207912751 U CN 207912751U CN 201720699631 U CN201720699631 U CN 201720699631U CN 207912751 U CN207912751 U CN 207912751U
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- groove
- protrusion
- pedicle screw
- lockhole
- connecting rod
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Abstract
The utility model discloses a kind of interface structures of interlocking formula pedicle screw system, interlocking formula pedicle screw system includes main nail, pinning and connecting rod, interface structure is set between main nail and connecting rod, and interface structure includes protrusion and groove, and raised and groove the shape matches；The side of protrusion outwardly protrudes to form limited block, and the side of the groove outwardly protrudes to form limiting slot, the shape matching of the limited block and limiting slot.The interlocking formula pedicle screw of the utility model and the connecting interface of sighting device can guarantee that pinning is accurately placed in lockhole, effectively avoid the deviation generated in pinning fixation procedure and delay fixation procedure, and then to the adverse effect of body generation.
Description
Technical field
The utility model belongs to field of medical device, and in particular to a kind of interlocking formula pedicle screw.
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.For this
Apply for that the interlocking formula pedicle screw proposed in assembly, needs that pinning is accurately placed in main nail by sighting device, therefore,
Can the interface structure between main nail and sighting device affects pinning accurately be placed in main nail.
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
The interface structure of nail system allows sighting device that accurately pinning to be placed in main nail.
To achieve the goals above, the utility model adopts the following technical solution is achieved：
A kind of interface structure of interlocking formula pedicle screw system, the interlocking formula pedicle screw system include master
Nail, pinning and sighting device, the interface structure are set between main nail and sighting device, and the interface structure includes raised and recessed
The shape of slot, the protrusion and groove matches；The side of the protrusion outwardly protrudes to form limited block, the groove
Side outwardly protrudes to form limiting slot, the shape matching of the limited block and limiting slot.
The utility model also has following distinguishing feature：
The protrusion be set to sighting device end, the groove be set to master nail on, the main nail include crown and
Rivet nut, the groove are set at the top of rivet nut.
The master nails on equipped with lockhole, and the center line of the limited block and the axis of lockhole are in the same plane.
The protrusion be regular hexagon shape, the limited block be set to hexagon protrusion wherein on one side on；Described
Groove be regular hexagon shape, the limiting slot be set to hexagonal indentations wherein on one side on.
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 sighting device and pedicle screw connector of the utility model.
Fig. 2 is the structure chart of the interlocking pedicle screw system of the utility model.
Fig. 3 is the interlocking vertebral pedicle bolt structure figure of the utility model.
Fig. 4 is the structure chart of the sighting device 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 utility model provides a kind of interlocking formula pedicle screw system, including interlocking formula pedicle screw and sighting device,
Wherein, interlocking formula 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, crown
1-1-1 can reach pinning installation direction with this and be set to crown U-type groove around rivet nut 1-1-2 rotations and angulation (i.e. multi-axial screws)
In pitman the purpose that does not restrain mutually of installation direction.
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, screw thread is equipped 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 Figure 1, the present embodiment provides a kind of interface structure of interlocking formula pedicle screw system, wherein interlocking formula
Pedicle screw system includes main nail 1-1, pinning 1-2 and connecting rod 2-1, interface structure be set to main nail 1-1 and connecting rod 2-1 it
Between, interface structure includes protrusion 2-1-1 and groove 1-1-4；Raised 2-1-1 is set to the end of connecting rod, and groove 1-1-4 is set to master
It follows closely on 1-1, main nail 1-1 includes crown 1-1-1 and rivet nut 1-1-2, and groove 1-1-4 is set at the top of rivet nut.
Raised 2-1-1 is regular hexagon shape, and hexagon protrusion wherein outwardly protrudes to form limited block 2-1-1-1 on one side；
Groove 1-1-4 is regular hexagon shape, and hexagonal indentations wherein outwardly protrude to form limiting slot 1-1-4-1, raised 2-1-1 on one side
It is matched with the shape of groove 1-1-4, while the center line of limited block 2-1-1-1 and the axis of lockhole 1-1-6 are generally aligned in the same plane
On.
Embodiment 2
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；The sighting device of wherein interlocking formula pedicle screw is same as Example 1；
Quasi- 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 and aiming
One end connection of 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
Shape matches, and the other end for aiming at arm 2-2 is equipped with through-hole 2-2-1, and the axis of through-hole 2-2-1 is overlapped with the axis of lockhole 1-1-6,
When the raised 2-1-1 in connecting rod is placed in groove 1-1-4, the axis of the through-hole 2-2-1 on arm is aimed at lockhole 1-1-6's
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 (2)
1. a kind of interface structure of interlocking formula pedicle screw system, it is characterised in that：The interlocking formula pedicle screw system
System includes main nail (1-1), pinning (1-2) and sighting device, and the interface structure is set to main nail (1-1) between sighting device, institute
The interface structure stated includes raised (2-1-1) and groove (1-1-4), the shape of the protrusion (2-1-1) and groove (1-1-4)
Matching；The side of the protrusion (2-1-1) outwardly protrudes to form limited block (2-1-1-1), and the side of the groove is outside
Protrusion forms limiting slot (1-1-4-1), the shape matching of the limited block (2-1-1-1) and limiting slot (1-1-4-1)；
The sighting device includes connecting rod (2-1), aims at arm (2-2), sleeve (2-3) and guide cylinder (2-4)；Connecting rod (2-
1) one end connect L-shaped with the one end for aiming at arm (2-2)；The protrusion (2-1-1) is arranged in the another of connecting rod (2-1)
The other end at end, the aiming arm (2-2) is equipped with through-hole (2-2-1), axis and the lockhole (1- of the through-hole (2-2-1)
Axis 1-6) overlaps；The groove (1-1-4) is set on main nail (1-1), and the main nail (1-1) includes crown (1-1-
1) it is set at the top of rivet nut with rivet nut (1-1-2), the groove (1-1-4)；The master nails on equipped with lockhole (1-1-6), institute
The axis of the center line and lockhole (1-1-6) of the limited block (2-1-1-1) stated is in the same plane；When the protrusion in connecting rod
When (2-1-1) is placed in groove (1-1-4), the axis weight of the axis and lockhole (1-1-6) of the through-hole (2-2-1) on arm is aimed at
It closes.
2. the interface structure of interlocking formula pedicle screw system as described in claim 1, it is characterised in that：The protrusion
(2-1-1) be regular hexagon shape, the limited block (2-1-1-1) be set to hexagon protrusion wherein on one side on；Described is recessed
Slot (1-1-4) be regular hexagon shape, the limiting slot (1-1-4-1) be set to hexagonal indentations wherein on one side on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720699631.6U CN207912751U (en) | 2017-06-15 | 2017-06-15 | A kind of interface structure of interlocking formula pedicle screw system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720699631.6U CN207912751U (en) | 2017-06-15 | 2017-06-15 | A kind of interface structure of interlocking formula pedicle screw system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207912751U true CN207912751U (en) | 2018-09-28 |
Family
ID=63612301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720699631.6U Expired - Fee Related CN207912751U (en) | 2017-06-15 | 2017-06-15 | A kind of interface structure of interlocking formula pedicle screw system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207912751U (en) |
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2017
- 2017-06-15 CN CN201720699631.6U patent/CN207912751U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20190615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |