CN219480299U - Connecting rod, rod connecting seat, pedicle screw, transverse connection and nail rod fixing system - Google Patents
Connecting rod, rod connecting seat, pedicle screw, transverse connection and nail rod fixing system Download PDFInfo
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- CN219480299U CN219480299U CN202223044657.7U CN202223044657U CN219480299U CN 219480299 U CN219480299 U CN 219480299U CN 202223044657 U CN202223044657 U CN 202223044657U CN 219480299 U CN219480299 U CN 219480299U
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- tooth surface
- positioning
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Abstract
The utility model discloses a connecting rod, a rod connecting seat, a pedicle screw, a transverse connection and a nail rod fixing system, and belongs to the technical field of orthopedic implants. The rod connecting seat is provided with a rod accommodating groove for accommodating the connecting rod, a second tooth surface matched with the positioning tooth or the positioning groove on the connecting rod is arranged in the rod accommodating groove, and a fastener for fixing the connecting rod is arranged on the rod connecting seat. According to the utility model, the connecting rod can be prevented from rotating after being fixed, so that the firmness of the connecting rod is improved, the vertebral body is firmly fixed, and the operation risk is reduced.
Description
Technical Field
The utility model relates to the technical field of orthopedic implants, in particular to a connecting rod, a rod connecting seat, a pedicle screw, a transverse connection and a nail rod fixing system.
Background
The spine is positioned in the center of the back of a human body, the upper end is connected with the skull, the lower end reaches the coccyx tip, the nerve blood vessels are staggered and dense, and the spine is a life hub of the whole body and bears the functions of loading, shock absorption, protection, exercise and the like. In recent years, spinal health problems have been of interest. People suffering from congenital spine diseases, spinal tumors, spinal trauma, cervical and lumbar diseases caused by long-time keeping of the same posture and the like have higher requirements on the operation process and operation quality of doctors.
In spinal surgery, rod fixation systems are often used as internal fixation systems. Pedicle screws are widely used as a mature surgical device. The implanted nail-bar fixing system can maintain the stability among the spinal segments after operation and replace the spinal load; spinal surgery follows three general principles: decompressing, fixing and fusing.
The following problems remain with the nail rod fixing systems: the connecting rod adopts a cylindrical design, and is easy to rotate in the U-shaped groove of the pedicle screw after being fixed, so that the vertebral body is unstable to fix.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a connecting rod, a rod connecting seat, a pedicle screw, a transverse connection and nail rod fixing system which can prevent rotation after fixing.
In order to solve the technical problems, the utility model provides the following technical scheme:
in one aspect, a connecting rod is provided, wherein at least a part of the connecting rod is provided with positioning teeth or positioning grooves extending along the length direction of the connecting rod.
Further, the number of the positioning teeth is at least two and the positioning teeth are arranged in parallel to form a first tooth surface on the connecting rod.
Further, the number of the first tooth surfaces is at least two, and the first tooth surfaces are arranged at intervals along the length direction of the connecting rod.
On the other hand, a rod connecting seat is provided, the rod connecting seat is provided with a rod accommodating groove for accommodating a connecting rod, a second tooth surface matched with a positioning tooth or a positioning groove on the connecting rod is arranged in the rod accommodating groove, and a fastener for fixing the connecting rod is arranged on the rod connecting seat.
Further, the second tooth surface is positioned on the bottom wall or the side wall of the rod accommodating groove;
and/or the rod accommodating groove is a U-shaped groove with an upper opening or a C-shaped groove with a side opening;
and/or the fastener is a screw plug which is spirally assembled on the rod connecting seat.
In yet another aspect, a pedicle screw is provided, comprising a screw seat and a screw body connected below the screw seat, wherein the screw seat is the rod connecting seat.
In yet another aspect, a transverse connection is provided, including two rod connection seats, and a connecting rod located between the two rod connection seats for connecting the two rod connection seats, where the rod connection seats are the rod connection seats described above.
In yet another aspect, a rod fixation system is provided, comprising a connecting rod, as described above, and at least two pedicle screws, as described above.
Further, the connecting rod is a round connecting rod, and the second tooth surface is an arc tooth surface;
or the connecting rod is a connecting rod with a plane arranged on one side of the round connecting rod, the positioning teeth are positioned on the plane, and the second tooth surface is a plane tooth surface;
or the connecting rod is a square connecting rod, the positioning teeth are positioned on the plane of one side of the square connecting rod, and the second tooth surface is a plane tooth surface.
Further, the stick accommodation groove is an upper opening U-shaped groove, wherein:
a transverse convex rib perpendicular to the length direction of the connecting rod is arranged on the bottom wall of the rod accommodating groove of at least one pedicle screw, and a transverse groove matched with the transverse convex rib is arranged on the connecting rod;
or, a transverse positioning groove perpendicular to the length direction of the connecting rod is arranged on the bottom wall of the rod accommodating groove of at least one pedicle screw, and a transverse convex rib matched with the transverse positioning groove is arranged on the connecting rod;
or, the side wall of the rod accommodating groove of at least one pedicle screw is provided with a vertical groove, and the connecting rod is provided with a vertical convex rib matched with the vertical groove.
The utility model has the following beneficial effects:
according to the connecting rod, the rod connecting seat, the pedicle screw, the transverse connection and the nail rod fixing system, the locating teeth or the locating grooves extending along the length direction of the connecting rod are formed in at least one part of the connecting rod, the rod connecting seat is provided with the rod containing grooves used for containing the connecting rod, the second tooth surfaces matched with the locating teeth or the locating grooves on the connecting rod are formed in the rod containing grooves, the part of the connecting rod with the locating teeth or the locating grooves is placed in the rod containing grooves of the rod connecting seat in operation and meshed with the second tooth surfaces in the rod containing grooves, after the connecting rod is fixed, the connecting rod cannot rotate, the firmness of the connecting rod is better improved, the fixing of a vertebral body is firmer, and the operation risk is reduced.
Drawings
FIG. 1 is a schematic view showing the overall structure of an embodiment 1 of the nail rod fixing system of the present utility model;
FIG. 2 is a schematic view of the rod connection socket of the pedicle screw of FIG. 1, wherein (a) is a structural view before installing the connecting rod and (b) is a structural view after installing the connecting rod;
FIG. 3 is a schematic view of the connecting rod of FIG. 1;
FIG. 4 is a schematic view showing the overall structure of an embodiment 2 of the nail rod fixing system of the present utility model;
FIG. 5 is a schematic view of the rod connection socket of the pedicle screw of FIG. 4, wherein (a) is a structural view of the pedicle screw before installation of the connecting rod, and (b) is a structural view of the pedicle screw after installation of the connecting rod;
FIG. 6 is a schematic view showing the overall structure of embodiment 3 of the nail rod fixing system of the present utility model;
FIG. 7 is a schematic view of the rod connection socket of the pedicle screw of FIG. 6, wherein (a) is a structural view of the pedicle screw before installation of the connecting rod, and (b) is a structural view of the pedicle screw after installation of the connecting rod;
FIG. 8 is a schematic view of an improved construction of a rod connection socket of a pedicle screw in the screw rod fixation system of the utility model;
FIG. 9 is a schematic view showing a modified structure of a connecting rod in the nail rod fixing system of the present utility model;
fig. 10 is a schematic structural view of a screw plug in the nail rod fixing system of the present utility model, wherein (a) is a side view and (b) is a top view.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
In one aspect, the present utility model provides a connecting rod 1, 1', 1", as shown in fig. 1-9, wherein at least a portion of the connecting rod 1, 1', 1" is provided with positioning teeth or positioning grooves extending in the length direction of the connecting rod 1, 1', 1". The positioning teeth or positioning grooves may be located on a certain part of the connecting rod 1, 1', 1″ or may extend along the entire length of the connecting rod 1, 1', 1″.
Meanwhile, the present utility model provides a rod connection socket 20, the rod connection socket 20 having a rod receiving groove 21 for receiving the connection rod 1, 1', 1", the rod accommodating groove 21 is internally provided with second tooth surfaces 22, 22', 22″ which are matched with the positioning teeth or the positioning grooves on the connecting rods 1, 1', the rod connection base 20 is provided with a fastener for fixing the connection rods 1, 1', 1" to prevent the connection rods 1, 1', 1 "from coming out.
In use, the connecting rod 1, 1', 1 "is held and the part of the connecting rod 1, 1', 1" with the positioning teeth or the positioning grooves is placed in the rod accommodating groove 21 of the rod connecting seat 20, the connecting rod 1, 1', 1 "is adjusted, the positioning teeth or positioning grooves on the connecting rods 1, 1', 1" are engaged with the second tooth surfaces 22, 22', 22 "in the rod receiving grooves 21, finally, the connecting rods 1, 1' are fixed in the rod accommodating groove 21 by using fasteners, and the fixing of the connecting rods 1, 1' is completed.
According to the connecting rod and the rod connecting seat, the locating teeth or the locating grooves extending along the length direction of the connecting rod are formed in at least one part of the connecting rod, the rod connecting seat is provided with the rod accommodating groove used for accommodating the connecting rod, the second tooth surface matched with the locating teeth or the locating grooves on the connecting rod is arranged in the rod accommodating groove, the part of the connecting rod with the locating teeth or the locating grooves is placed in the rod accommodating groove of the rod connecting seat in operation and meshed with the second tooth surface in the rod accommodating groove, after the connecting rod is fixed, the connecting rod cannot rotate, the firmness of the connecting rod is better improved, the vertebral body is fixed more firmly, and the operation risk is reduced.
As shown in fig. 2, 5 and 7, after the connection bars 1, 1', 1 "are fixed, in order to better prevent the connection bars 1, 1', 1" from rotating, the number of positioning teeth may be at least two and arranged side by side so as to form first tooth surfaces 11, 11', 11 "on the connection bars 1, 1', 1", and the first tooth surfaces 11, 11', 11 "of the connection bars 1, 1', 1" are used to engage with the second tooth surfaces 22, 22', 22 "of the bar connection base 20, thereby improving the firmness. The number of first tooth flanks 11, 11', 11″ may be one and only at a certain part of the connecting rod 1, 1', 1″, but preferably at least two and spaced apart along the length of the connecting rod 1, 1', 1″, i.e. the first tooth flanks 11, 11', 11″ are arranged stepwise along the length of the connecting rod 1, 1', 1″ (see fig. 3).
The second tooth surfaces 22, 22', 22″ on the rod connection socket 20 may be located on the bottom wall or the side wall of the rod receiving groove 21; the rod receiving groove 21 may be an upper-opening U-shaped groove or a side-opening C-shaped groove; in the embodiment shown in fig. 2, 5 and 7, the rod receiving channel 21 is an upwardly open U-shaped channel, with the second tooth flanks 22, 22', 22 "being located on the bottom wall of the U-shaped channel.
The fastening means for fastening the connecting rods 1, 1', 1″ to the rod connection block 20 may take various conventional structural forms in the art, for example, as shown in fig. 10, the fastening means may be a screw plug 3 screw-fitted to the rod connection block 20. The rear end of the screw plug 3 may be provided with an instrument operation portion (particularly, a quincuncial hole 31) for easy operation.
In another aspect, the present utility model provides a pedicle screw 2, as shown in fig. 1-7, comprising a pin holder (rod holder 20) and a pin body 23 attached below the pin holder, the pin holder being the rod holder 20 described above. Since the structure of the rod connection socket 20 is the same as that described above, a detailed description thereof will be omitted.
The pedicle screw comprises a screw seat (rod connecting seat) and a screw body connected below the screw seat, wherein the rod connecting seat is provided with a rod accommodating groove for accommodating a connecting rod, a second tooth surface matched with a positioning tooth or a positioning groove on the connecting rod is arranged in the rod accommodating groove, a part of the connecting rod with the positioning tooth or the positioning groove is placed in the rod accommodating groove of the rod connecting seat in operation and meshed with the second tooth surface in the rod accommodating groove, and after the connecting rod is fixed, the connecting rod cannot rotate, so that the firmness of the connecting rod is better improved, the vertebral body is more firmly fixed, and the operation risk is reduced.
The pedicle screw 2 in the utility model can be either a universal pedicle screw or a unidirectional pedicle screw. In the embodiment shown in the figures, the pedicle screw 2 is exemplified as a unidirectional pedicle screw.
In yet another aspect, the present utility model provides a cross-connect (not shown) comprising two rod connection sockets, and a connecting rod between the two rod connection sockets for connecting the two rod connection sockets, the rod connection sockets being the rod connection sockets 20 described above. Since the structure of the rod connection socket 20 is the same as that described above, a detailed description thereof will be omitted.
The transverse connection comprises two rod connecting seats and a connecting rod positioned between the two rod connecting seats and used for connecting the two rod connecting seats, wherein the rod connecting seats are provided with rod accommodating grooves used for accommodating connecting rods, second tooth surfaces matched with positioning teeth or positioning grooves on the connecting rods are arranged in the rod accommodating grooves, the parts of the connecting rods with the positioning teeth or the positioning grooves are placed in the rod accommodating grooves of the rod connecting seats in operation, and are meshed with the second tooth surfaces in the rod accommodating grooves, after the connecting rods are fixed, the connecting rods cannot rotate, the firmness of the connecting rods is improved, the transverse connection is not easy to loosen, the vertebral bodies are fixed firmly, and the operation risk is reduced.
In yet another aspect, the present utility model provides a rod fixation system, as shown in fig. 1-10, comprising a connecting rod, which is the connecting rod 1, 1', 1 "described above, and at least two pedicle screws, which are the pedicle screws 2 described above. Since the structures of the connecting rods 1, 1', 1″ and the pedicle screws 2 are the same as above, no further description is given here.
In operation, the patient is anesthetized, a posterior median incision is made until the lamina, the articular process joint and the transverse process are exposed, the screw feeding point of the pedicle screw 2 is determined, then the pedicle screw 2 on both sides is held and implanted, the connecting rod 1, 1', 1″ is held and the portion of the connecting rod 1, 1', 1″ having the positioning teeth or grooves is placed in the rod receiving groove 21 of the rod connecting seat 20 of the pedicle screw 2, then, the screw plugs 3 are screwed into the rod connecting seat 20 and the connecting rods 1, 1', 1″ are pre-pressed, after all the screw plugs 3 on the same side are installed, all the screw plugs 3 on the same side are screwed to fix the connecting rods 1, 1', 1″ in the rod accommodating groove 21 after the connecting rods 1, 1', 1″ are adjusted to proper positions, and the fixing of the connecting rods 1, 1', 1″ on one side is completed and the other side is the same.
The rod fixing system comprises a connecting rod and at least two pedicle screws, wherein at least one part of the connecting rod is provided with positioning teeth or positioning grooves extending along the length direction of the connecting rod, a rod connecting seat of the pedicle screws is provided with rod accommodating grooves for accommodating the connecting rod, second tooth surfaces matched with the positioning teeth or the positioning grooves on the connecting rod are arranged in the rod accommodating grooves, the part of the connecting rod with the positioning teeth or the positioning grooves is placed in the rod accommodating grooves of the rod connecting seat in operation, the part of the connecting rod with the positioning teeth or the positioning grooves is meshed with the second tooth surfaces in the rod accommodating grooves, after the connecting rod is fixed, the connecting rod cannot rotate, the firmness of the connecting rod is improved, the vertebral body is firmly fixed, and the surgical risk is reduced. The utility model is suitable for spinal surgery, in particular for posterior spinal surgery.
For further strengthening the fixation of the vertebral bodies, the connecting rods 1, 1', 1″ may be provided with transverse links, which are the above-mentioned transverse links. The structure of the transverse connection is the same as that of the above, so that the description is omitted here.
Depending on the cross-sectional shape of the connecting rod 1, 1', 1", the utility model may have the following embodiments:
example 1
As shown in fig. 1-3, the connecting rod 1 may be a circular connecting rod, in which case the first tooth surface 11 formed by the positioning teeth on the connecting rod 1 is preferably an annular tooth surface, and the second tooth surface 22 on the rod connecting seat 20 is a mating arcuate tooth surface.
Example 2
As shown in fig. 4-5, the connecting rod 1' may be a connecting rod provided with a plane (similar to a semicircular connecting rod) on one side of the circular connecting rod, on which plane the positioning teeth are located, in which case the first tooth surface 11' formed by the positioning teeth on the connecting rod 1 is preferably a plane tooth surface, and the second tooth surface 22' on the rod connection socket 20 is a mating plane tooth surface.
Example 3
As shown in fig. 6-7, the connecting rod 1 "may be a square connecting rod, the positioning teeth are located on a plane on one side of the square connecting rod, in which case, the first tooth surface 11" formed by the positioning teeth on the connecting rod 1 "is preferably a planar tooth surface, and the second tooth surface 22" on the rod connecting seat 20 is a matched planar tooth surface.
In the above embodiments, after the connecting rods 1, 1', 1″ are fixed, the present utility model may be modified as follows in order to prevent the connecting rods 1, 1', 1″ from moving in the length direction thereof (i.e., axially moving):
the improvement is as follows: as shown in fig. 8-9, the bottom wall of the rod receiving groove 21 of at least one pedicle screw 2 may be provided with a transverse rib 24 perpendicular to the length direction of the connecting rod 1, 1', 1", and the connecting rod 1, 1', 1" is provided with a transverse groove 12 matching the transverse rib 24; when the connecting rods 1, 1', 1 "are adjusted in operation, the transverse convex ribs 24 on the bottom wall of the rod accommodating groove 21 are positioned in the transverse grooves 12 on the connecting rods 1, 1', 1", and after the connecting rods 1, 1', 1 "are fixed, the connecting rods 1, 1', 1" can be prevented from moving along the length direction, so that the connecting rods 1, 1', 1 "are conveniently positioned.
Improvement two (not shown): the bottom wall of the rod accommodating groove 21 of at least one pedicle screw 2 can be provided with a transverse positioning groove vertical to the length direction of the connecting rod 1, 1', and the connecting rod 1, 1' is provided with a transverse convex rib matched with the transverse positioning groove; when the connecting rods 1, 1' are adjusted in operation, the transverse convex ribs on the connecting rods 1, 1' are positioned in the transverse grooves on the bottom wall of the rod accommodating groove, after the connecting rods 1, 1' are fixed, the connecting rods 1, 1' are prevented from moving along the length direction, the connecting rods 1, 1', 1 "are conveniently positioned.
Improvement three (not shown): the side wall of the rod accommodating groove 21 of at least one pedicle screw 2 can be provided with a vertical groove, and the connecting rods 1, 1', 1″ are provided with vertical convex ribs matched with the vertical grooves; the vertical ribs on the connecting rods 1, 1', 1″ are slid into the bottom of the rod accommodating groove 21 along the vertical grooves on the side wall of the rod accommodating groove 21 during operation, after the connecting rods 1, 1' are fixed, the connecting rods 1, 1 'are prevented from moving along the length direction, the connecting rods 1, 1', 1 "are conveniently positioned. Further, vertical grooves may be formed on both side walls of the rod accommodating groove 21, and vertical ribs are formed on both sides of the corresponding connecting rods 1, 1', 1", so that after the connecting rods 1, 1', 1" are fixed, the connecting rods 1, 1', 1 "can be better prevented from moving along the length direction thereof.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.
Claims (9)
1. The connecting rod is characterized in that at least one part of the connecting rod is provided with positioning teeth extending along the length direction of the connecting rod, and the number of the positioning teeth is at least two and the positioning teeth are arranged in parallel to form a first tooth surface on the connecting rod.
2. The connector rod of claim 1, wherein the number of first tooth surfaces is at least two and spaced apart along the length of the connector rod.
3. The rod connecting seat is characterized by comprising a rod accommodating groove for accommodating a connecting rod, a second tooth surface matched with the positioning tooth or the positioning groove on the connecting rod is arranged in the rod accommodating groove, and a fastener for fixing the connecting rod is arranged on the rod connecting seat.
4. A wand connecting socket according to claim 3, wherein the second tooth surface is located on a bottom wall or a side wall of the wand receiving slot;
and/or the rod accommodating groove is a U-shaped groove with an upper opening or a C-shaped groove with a side opening;
and/or the fastener is a screw plug which is spirally assembled on the rod connecting seat.
5. A pedicle screw comprising a socket and a shank connected below the socket, wherein the socket is a rod connection socket as claimed in claim 3 or 4.
6. A transverse connection comprising two rod connection seats and a connecting rod between the two rod connection seats for connecting the two rod connection seats, wherein the rod connection seats are as claimed in claim 3 or 4.
7. A rod fixation system comprising a connecting rod and at least two pedicle screws, wherein the connecting rod is according to any one of claims 1-2 and the pedicle screws are according to claim 5.
8. The nail rod fixing system according to claim 7, wherein said connecting rod is a circular connecting rod and said second tooth surface is an arcuate tooth surface;
or the connecting rod is a connecting rod with a plane arranged on one side of the round connecting rod, the positioning teeth are positioned on the plane, and the second tooth surface is a plane tooth surface;
or the connecting rod is a square connecting rod, the positioning teeth are positioned on the plane of one side of the square connecting rod, and the second tooth surface is a plane tooth surface.
9. The nailer fixation system of claim 7 wherein said rod receiving channel is an upwardly open U-shaped channel wherein:
a transverse convex rib perpendicular to the length direction of the connecting rod is arranged on the bottom wall of the rod accommodating groove of at least one pedicle screw, and a transverse groove matched with the transverse convex rib is arranged on the connecting rod;
or, a transverse positioning groove perpendicular to the length direction of the connecting rod is arranged on the bottom wall of the rod accommodating groove of at least one pedicle screw, and a transverse convex rib matched with the transverse positioning groove is arranged on the connecting rod;
or, the side wall of the rod accommodating groove of at least one pedicle screw is provided with a vertical groove, and the connecting rod is provided with a vertical convex rib matched with the vertical groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223044657.7U CN219480299U (en) | 2022-11-16 | 2022-11-16 | Connecting rod, rod connecting seat, pedicle screw, transverse connection and nail rod fixing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223044657.7U CN219480299U (en) | 2022-11-16 | 2022-11-16 | Connecting rod, rod connecting seat, pedicle screw, transverse connection and nail rod fixing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219480299U true CN219480299U (en) | 2023-08-08 |
Family
ID=87479856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223044657.7U Active CN219480299U (en) | 2022-11-16 | 2022-11-16 | Connecting rod, rod connecting seat, pedicle screw, transverse connection and nail rod fixing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219480299U (en) |
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2022
- 2022-11-16 CN CN202223044657.7U patent/CN219480299U/en active Active
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