CN111759438A

CN111759438A - Posterior resetting internal fixing system

Info

Publication number: CN111759438A
Application number: CN202010795395.4A
Authority: CN
Inventors: 张银顺; 高国强; 仉凤梧; 白艳丽; 于清印
Original assignee: Beijing Fule Science & Technology Development Co ltd
Current assignee: Beijing Fule Science & Technology Development Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2020-10-13

Abstract

The invention discloses a posterior reduction internal fixation system, which comprises two vertebral orthopedic rods arranged in parallel and an adjusting device. When in operation, the connecting rod of the two vertebral body orthopedic rods is connected with the vertebral body, and the occipital plate is connected with the occipital bone, so that the connection of the posterior reduction internal fixation system with the occipital bone and the vertebral body is realized; connecting the base component with a pedicle screw close to the occiput, and connecting the connecting component with an occiput screw; to the inclination between occipital plate and the connective bar adjust, specifically do, through the motion of first linear drive assembly drive connecting rod, make first drag hook and second drag hook respectively with two occipital bone screw connections on the occipital bone, through the motion of the first linear drive assembly of the linear drive assembly drive of second, first drag hook and second drag hook motion on first linear drive assembly drive connecting rod and the connecting rod, carry to draw the traction to the occipital bone, inclination to the anatomical structure who accords with human occipital bone and cervical vertebra between messenger's occipital plate and the connective bar, realize the way of escape and reset the internal fixation.

Description

Posterior resetting internal fixing system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a posterior reduction internal fixation system.

Background

Basis cranial sinus (basilar invasion) is a congenital malformation of the cranioconjunctival junction area, and is clinically manifested by that the skull base bone around the macropore of the occipital bone sinks upwards into the cranial cavity, forcing the atlantoaxial (dentate process) below the skull base to rise into the skull base, which can merge other abnormal bone development at the part and merge abnormal nerve structure.

The patient often accompanies the increase of the front spacing of the atlanto-odontoid, the dentate apex exceeds the rear margin of the hard palate and is connected with the rear upper margin of the large hole of the occipital bone, so that the front and rear diameters of the large hole of the occipital bone are relatively narrow, the medulla oblongata and the high spinal cord are pressed, corresponding spinal cord injury symptoms are generated, and the serious patient induces respiratory dysfunction to die.

The posterior occipital bone large-hole enlargement and decompression combined in-situ occipital-cervical fusion internal fixation is usually adopted clinically, or the anterior occipital bone is reset through odontoid resection or lateral atlantoaxial mass joint release, and then the occipital bone and atlantoaxial are reset combined with the posterior fixation occipital-cervical fusion, but the technology has large wound and high risk.

Currently, some scholars adopt simple posterior reduction to loosen, reduce and fix the atlantoaxial lateral mass in the atlantoaxial region to realize atlantoaxial reduction and correct deformity, the technology has small wound and relatively reduced risk, but lacks a convenient and effective posterior reduction internal fixation system.

Therefore, how to realize the internal fixation of the posterior resetting becomes a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of this, the present invention provides a posterior resetting internal fixation system to achieve posterior resetting internal fixation.

In order to achieve the purpose, the invention provides the following technical scheme:

a posterior reposition internal fixation system, which comprises two vertebral orthopedic rods arranged in parallel and an adjusting device,

the vertebral orthopedic rod comprises a connecting rod and an occipital plate,

the connecting rod can be connected with pedicles on the same side of at least two vertebral bodies from the third vertebral body to the seventh vertebral body through pedicle screws;

the occipital plate can be connected with an occipital bone through occipital bone screws, the occipital plate is arranged along the length extending direction of the connecting rod and is connected with the connecting rod, and the occipital plate is obliquely arranged relative to the connecting rod;

the adjusting device is used for adjusting the inclination angle of the occipital plate relative to the connecting rod and comprises a base component, a connecting component and a fine adjustment component,

the base component is connected with the connecting rod;

the connecting component comprises a first drag hook, a second drag hook and a connecting rod,

the connecting rod is vertical to the connecting rod,

the first drag hook and the second drag hook are parallel and vertical to the connecting rod, the hook ends of the first drag hook and the second drag hook are respectively connected with the two occipital bone screws, the fixed ends of the first drag hook and the second drag hook are connected with the connecting rod through a rotating block, a first threaded hole is formed in the rotating block, and a first locking bolt used for locking the rotating block on the connecting rod is arranged in the first threaded hole;

the fine adjustment assembly includes a first linear drive assembly and a second linear drive assembly,

the first linear driving assembly is connected with the connecting rod, is used for driving the connecting rod to move along the direction vertical to the connecting rod, is used for adjusting the angle between the first draw hook and the second draw hook and the occipital screw,

the second linear driving assembly is connected with the first linear driving assembly and used for driving the first linear driving assembly to move along the direction parallel to the connecting rod and used for adjusting the inclination angle between the occipital plate and the connecting rod, and the second linear driving assembly is installed on the base assembly.

Preferably, in the posterior reduction internal fixation system, the base assembly comprises a hook arm, a support rod, a sliding beam and a first sliding block,

the sliding beam is perpendicular to the connecting rod,

the number of the first sliding blocks is two, the first sliding blocks are arranged at two ends of the sliding beam in the length direction in a sliding manner, a second threaded hole is arranged on the first sliding block, a second locking bolt is arranged in the second threaded hole, the first sliding block is locked on the sliding beam through the second locking bolt, a third threaded hole is formed in the first sliding block, a threaded section matched with the third threaded hole is arranged at the first end of the supporting rod in the length direction, the first end of the supporting rod is connected to the first sliding blocks through the thread section, the second end of the supporting rod in the length direction can be abutted against the screw plug of the pedicle screw, at least two hook arms are arranged on each first sliding block, the hook arm is parallel to the supporting rod, the first end of the hook arm in the length direction is connected with the first sliding block, and the second end of the hook arm in the length direction is provided with a hook capable of pulling the connecting rod.

Preferably, in the posterior resetting internal fixation system, a connecting block is arranged in the middle of the sliding beam, a sliding hole is formed in the connecting block, and the axis direction of the sliding hole is parallel to the driving direction of the second linear driving assembly;

the second linear driving component comprises a first fixed block, a first lead screw and a guide rod,

the number of the guide rods is two, the first lead screw is located between the two guide rods and is parallel to the guide rods, first ends of the guide rods and the first lead screw in the axis direction penetrate through the sliding holes to be connected with the first linear driving assembly, second ends of the guide rods and the first lead screw in the axis direction are connected with the first fixing block, and a fourth threaded hole matched with the first lead screw is formed in the first fixing block.

Preferably, in the posterior resetting internal fixation system, the second linear driving assembly further includes a second fixed block connected to the first linear driving assembly, and the second fixed block is provided with three first mounting holes corresponding to the guide rod and the second lead screw respectively.

Preferably, in the posterior resetting internal fixation system, a reinforcing plate is arranged on the second fixed block, the reinforcing plate is a right-angle triangular prism plate, and two right-angle surfaces of the reinforcing plate are respectively connected with the first linear driving assembly and the second fixed block.

Preferably, in the posterior resetting internal fixation system, a first limit bolt is arranged at an end of the sliding beam and used for limiting the first sliding block.

Preferably, in the posterior resetting internal fixation system, the first linear driving assembly comprises a third fixed block and a second lead screw,

a slideway vertical to the connecting rod is formed in the third fixing block, the connecting rod transversely penetrates through the slideway, a second mounting hole coaxial with the slideway is formed in the third fixing block, and the side wall of the third fixing block is connected with the right-angle surface of the reinforcing plate;

the first end of the axis direction of the second lead screw is inserted into the slide way through the second mounting hole and is connected with the connecting rod, a fifth threaded hole matched with the second lead screw is formed in the connecting rod, and the second end of the axis direction of the second lead screw is located outside the slide way.

Preferably, in the posterior resetting internal fixing system, the connecting rod comprises a first connecting rod and a second connecting rod which are coaxially arranged, two rotating blocks are respectively arranged on the first connecting rod and the second connecting rod,

the first linear driving assembly further comprises a second sliding block, the second sliding block is located between the first connecting rod and the second connecting rod and connected with the first connecting rod and the second connecting rod, a fifth threaded hole is formed in the second sliding block, and the second lead screw is connected with the second sliding block through the fifth threaded hole and drives the second sliding block to slide along the slide way.

Preferably, in the posterior resetting internal fixing system, the two ends of the connecting rod are respectively provided with a second limiting bolt for limiting the rotating block.

Preferably, in the posterior reduction internal fixation system, the occipital plate is provided with a plurality of third mounting holes matched with the occipital screws, the third mounting holes are sequentially arranged along the length direction of the occipital plate, and the third mounting holes are elongated.

According to the technical scheme, the posterior reduction internal fixation system comprises two vertebral orthopedic rods arranged in parallel and an adjusting device, wherein the adjusting device comprises a base assembly, a connecting assembly and a fine adjustment assembly, and the fine adjustment assembly comprises a first linear driving assembly and a second linear driving assembly. During specific operation, in the first step, the connecting rods of the two vertebral body orthopedic rods are connected with at least two vertebral bodies from the third vertebral body to the seventh vertebral body through the pedicle screws, and the occipital plate is connected with the occipital bone through occipital bone screws, so that the connection between the posterior reduction internal fixation system and the occipital bone and the vertebral bodies is realized; connecting the base component with the pedicle screws close to the occiput, and connecting the connecting component with the occiput screws; and step three, adjusting the inclination angle between the occipital plate and the connecting rod. And step three, driving the connecting rod to move through the first linear driving assembly, enabling the first drag hook and the second drag hook to be respectively connected with two occipital screws on the occipital bone, driving the first linear driving assembly to move through the second linear driving assembly, driving the connecting rod and the first drag hook and the second drag hook on the connecting rod to move through the first linear driving assembly, carrying out lifting traction on the occipital bone, enabling the inclination angle between the occipital bone plate and the connecting rod to be in accordance with the anatomical structure of the occipital bone and the cervical vertebra of the human body, and achieving posterior resetting and internal fixation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a posterior reduction internal fixation system according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an orthopedic rod for vertebral bodies according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an adjusting device according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an adjusting device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base assembly according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of the hook arm and the first slider according to the embodiment of the present invention;

FIG. 7 is a schematic structural view of a sliding beam and a connecting block provided in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a connecting assembly according to an embodiment of the present invention;

fig. 9 is a schematic structural view of the connection between the first retractor and the rotating block according to the embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a trimming assembly according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a connection between a second fixing block and a third fixing block according to an embodiment of the present invention.

Wherein the content of the first and second substances,

1. the vertebral body orthopedic rod comprises a vertebral body orthopedic rod body, 11, a connecting rod, 12, an occipital plate, 2, an adjusting device, 21, a base component, 211, a hook arm, 212, a supporting rod, 213, a sliding beam, 214, a first sliding block, 215, a second locking bolt, 216, a connecting block, 217, a first limiting bolt, 22, a connecting component, 221, a first draw hook, 222, a second draw hook, 223, a connecting rod, 224, a rotating block, 225, a first locking bolt, 226, a second limiting bolt, 23, a fine adjustment component, 231, a first linear driving component, 2311, a third fixing block, 2312, a second lead screw, 2313, a second sliding block, 232, a second linear driving component, 2321, a first fixing block, 2322, a first lead screw, 2323, a guide rod, 2324, a second fixing block, 2325, a reinforcing plate, 3, a pedicle screw, 4 and an occipital screw.

Detailed Description

The invention discloses a posterior resetting internal fixing system, which is used for realizing posterior resetting internal fixing.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1-11. The invention discloses a posterior reduction internal fixation system, which is used for carrying out independent posterior reduction internal fixation, realizing the lifting, correction and reduction of occipital bone or atlantoaxial and assisting the implementation of a simple posterior reduction method.

The posterior reduction internal fixation system disclosed by the scheme comprises two vertebral orthopedic rods 1 which are arranged in parallel and an adjusting device 2.

The vertebral body orthopedic rod 1 is positioned on both sides of the spine and can be connected with the occiput and the pedicle of the vertebral body.

As shown in fig. 1 and 2, the orthopedic vertebral rod 1 includes a connecting rod 11 and an occipital plate 12.

The connecting rod 11 can be connected with the pedicle of vertebral body, and the two connecting rods 11 of the two vertebral body orthopedic rods 1 are arranged on two sides of the vertebral body in parallel. Specifically, the connecting rod 11 is connected with at least two vertebral bodies of the third vertebral body to the seventh vertebral body through the pedicle screws 3, and the connecting rod 11 is connected with the pedicles on the same side of the at least two vertebral bodies.

It should be noted here that the pedicle screws 3 are disposed on at least two of the third to seventh vertebral bodies, that is, the pedicle screws 3 are disposed on at least two of the third to seventh vertebral bodies, at least two means that the vertebral bodies on which the pedicle screws 3 are disposed may be two, three or four, and the pedicle screws 3 may be disposed on five vertebral bodies of the third to seventh vertebral bodies. The specific vertebral body on which the pedicle screw 3 is arranged is set by the person skilled in the art according to the actual need.

The occipital plate 12 can be connected with the occipital bone through occipital screws 4, and the two occipital plates 12 of the two vertebral orthopedic rods 1 are respectively connected with the two ends of the occipital bone. As shown in fig. 2, the occipital plate 12 is disposed along the length extension direction of the connecting rod 11, and the occipital plate 12 is connected to the connecting rod 11, the occipital plate 12 being obliquely arranged with respect to the connecting rod 11. It should be noted here that the inclination angle between the occipital plate 12 and the connecting rod 11 needs to conform to the anatomy of the occipital bone and the cervical vertebra of the human body.

Preferably, the occipital plate 12 is integrally formed with the connecting rod 11.

The adjusting device 2 comprises a base component 21, a connecting component 22 and a fine-tuning component 23, and is used for realizing the adjustable inclination angle between the occipital plate 12 and the connecting rod 11.

Base component 21 is connected with connective bar 11, and fine setting subassembly 23 is connected with base component 21 and coupling assembling 22, and coupling assembling 22 is connected with occipital screw 4.

Preferably, the base member 21 is connected to the pedicle screws 3 near the occiput and avoiding the pedicle screws 3 where the occiput plate 12 is connected to the connecting rod 11, as shown in fig. 1, and the base member 21 is connected to the second group of pedicle screws 3 on the connecting rod 11.

In one embodiment of the present disclosure, the connecting assembly 22 includes a first hook 221, a second hook 222 and a connecting rod 223. The connecting rod 223 is perpendicular to the connecting rods 11 and parallel to the plane of the two connecting rods 11, i.e. the back of the patient, and the two ends of the connecting rod 223 are respectively provided with the first hook 221 and the second hook 222.

The first draw hook 221 and the second draw hook 222 are parallel, the bent hook end of the first draw hook 221 and the bent hook end of the second draw hook 222 are respectively connected with two occipital bone screws 4 on the occipital bone, and the fixed ends of the first draw hook 221 and the second draw hook 222 are connected with the connecting rod 223 through the rotating block 224. The rotating block 224 can rotate around the connecting rod 223 in the circumferential direction, so that the angle between the first draw hook 221 and the second draw hook 222 and the occipital bone screw 4 is realized, and the angle between the first draw hook 221 and the second draw hook 222 and the occipital bone screw 4 is ensured to be consistent.

The first draw hook 221 and the second draw hook 222 are connected through the connecting rod 223, so that the first draw hook 221 and the second draw hook 222 are located at the same height, and the same drawing force and angle of the occiput by the first draw hook 221 and the second draw hook 222 are guaranteed.

The first drawing hook 221 and the second drawing hook 222 are only rotated when the angle between the first drawing hook and the occipital screw 4 needs to be adjusted, and are not rotated when the angle between the first drawing hook and the occipital screw 4 does not need to be adjusted, so that the stability of the posterior reduction internal fixation system is ensured. According to the scheme, the rotating block 224 is provided with a first threaded hole, the first threaded hole is internally provided with a first locking bolt 225, and when the angle between the first drag hook 221, the second drag hook 222 and the occipital bone screw 4 does not need to be adjusted, the first locking bolt 225 is screwed to enable the first locking bolt 225 to be abutted against the connecting rod 223, so that the rotating block 224 is locked on the connecting rod 223.

As shown in fig. 1, 3, 4, 8 and 9, the rotating block 224 is a cube-shaped rotating block, the rotating block 224 is coaxially arranged with the connecting rod 223, a first pull hook 221 or a second pull hook 222 is connected to a first side wall of the rotating block 224 parallel to the axis of the connecting rod 223, and a first locking bolt 225 is disposed on a second side wall of the rotating block 224 opposite to the first side wall. Specifically, a first bolt hole is formed in the second side wall, the first locking bolt 225 is located in the first bolt hole, and the first locking bolt 225 can abut against the rod wall of the connecting rod 223 to prevent the rotating block 224 from rotating on the connecting rod 223. Connecting rod 223 is cylindrical connecting rod 223 in this scheme.

In one embodiment of the present solution, the fine adjustment assembly 23 comprises a first linear driving assembly 231 and a second linear driving assembly 232.

The first linear driving assembly 231 is connected with the connecting rod 223, and is used for driving the connecting rod 223 to move along a direction perpendicular to the connecting rod 11, and is used for adjusting the distance between the first draw hook 221 and the second draw hook 222 and the occipital screw 4, so as to realize the matching of the first draw hook 221 and the second draw hook 222 with the occipital screw 4,

the second linear driving assembly 232 is connected with the first linear driving assembly 231 and is used for driving the first linear driving assembly 231 to move along the direction parallel to the connecting rod 11, and adjusting the inclination angle between the occipital plate 12 and the connecting rod 11, so that the occipital plate 12 can carry out lifting traction on the occipital bone. The second linear drive assembly 232 is mounted on the base assembly 21.

The posterior reduction internal fixation system disclosed by the scheme comprises two vertebral orthopedic rods 1 arranged in parallel and an adjusting device 2, wherein the adjusting device 2 comprises a base component 21, a connecting component 22 and a fine adjustment component 23, and the fine adjustment component 23 comprises a first linear driving component 231 and a second linear driving component 232. During specific operation, in the first step, the connecting rods 11 of the two vertebral body orthopedic rods 1 are connected with at least two vertebral bodies from a third vertebral body to a seventh vertebral body through the pedicle screws 3, and the occipital plate 12 is connected with the occipital bone through the occipital bone screws 4, so that the connection between the posterior reduction internal fixation system and the occipital bone and the vertebral bodies is realized; step two, connecting the base component 21 with the pedicle screw 3 close to the occiput, and connecting the connecting component 22 with the occiput screw 4; and step three, adjusting the inclination angle between the occipital plate 12 and the connecting rod 11. The third step is specifically that the first linear driving assembly 231 drives the connecting rod 223 to move, so that the first drag hook 221 and the second drag hook 222 are respectively connected with two occipital screws 4 on the occipital bone, the second linear driving assembly 232 drives the first linear driving assembly 231 to move, the first linear driving assembly 231 drives the connecting rod 223 and the first drag hook 221 and the second drag hook 222 on the connecting rod 223 to move, the occipital bone is pulled, so that the inclination angle between the occipital plate 12 and the connecting rod 11 is consistent with the anatomical structure of the occipital bone and the cervical vertebra of the human body, and the posterior approach reduction internal fixation is realized.

It should be noted that, during the driving process of the first linear driving assembly 231 and the second linear driving assembly 232, the first hook 221 and the second hook 222 are always in a rotating fit state with the connecting rod 223, and after the driving process of the first driving assembly and the second driving assembly is finished, the rotating block 224 is locked on the connecting rod 223 through the first locking bolt 225.

The technical scheme is that the occipital bone is pulled by at least two vertebral bodies from the third vertebral body to the seventh vertebral body, the linkage effect of the occipital bone on the atlantoaxial is utilized, the atlas is pulled, corrected and reset, the corresponding matched implant can be used for installing and controllably realizing the pulling, corrected and reset of the occipital bone and the atlantoaxial, and finally the adjusting device 2 is detached from the vertebral body correcting rod 1. The posterior reposition internal fixation system disclosed by the scheme slowly and softly adjusts the inclination angle between the occipital plate 12 and the vertebral body orthopedic rod 1 through the adjusting component, avoids damaging a human body, and avoids the operation difficulty and risk of implanting the pedicle screw 3 into the atlantoaxial through driving the occipital bone by utilizing the combined action of the occipital bone and the third to seventh vertebral bodies and the linkage action of the occipital bone on the atlantoaxial.

In the scheme, the hook ends of the first hook 221 and the second hook 221 are ball-socket hooks.

In one embodiment of the present solution, the base assembly 21 includes a hook arm 211, a support rod 212, a sliding beam 213, and a first slider 214.

As shown in fig. 1, the sliding beam 213 is perpendicular to the connecting rods 11 and parallel to the plane of the two connecting rods 11; the number of the first sliding blocks 214 is two, the first sliding blocks 214 are arranged at two ends of the sliding beam 213 in the length direction in a sliding mode, second threaded holes are formed in the first sliding blocks 214, second locking bolts 215 are arranged in the second threaded holes, the first sliding blocks 214 are locked on the sliding beam 213 through the second bolts matched with the second threaded holes, and the first sliding blocks 214 are prevented from sliding on the sliding beam 213;

the first sliding block 214 is further provided with a third threaded hole, a first end of the supporting rod 212 in the length direction is provided with a threaded section, the first end of the supporting rod 212 is connected to the first sliding block 214 through the threaded section matched with the third threaded hole, a second end of the supporting rod 212 in the length direction can abut against a screw plug of the pedicle screw 3, specifically, the supporting rod 212 is rotated, the threaded section of the supporting rod 212 rotates in the third threaded hole, the supporting rod 212 moves on the first sliding block 214 along the axis of the supporting rod 212, and the second end of the supporting rod 212 abuts against or does not abut against the screw plug;

each first slider 214 is provided with at least two hook arms 211, each hook arm 211 is parallel to the corresponding support rod 212, the corresponding support rod 212 is located between the two hook arms 211, a first end of each hook arm 211 in the length direction is connected with the corresponding first slider 214, a hook (or a hook) is arranged at a second end of each hook arm 211 in the length direction and can be hooked on the corresponding connecting rod 11, a threaded section of the corresponding support rod 212 rotates in a third threaded hole, the second end of the corresponding support rod 212 abuts against a plug screw, the corresponding support rod 212 continues to rotate, the corresponding support rod 212 jacks up the sliding beam 213, the corresponding connecting rod 11 can be lifted up by the second end of each hook arm 211, and connection between the corresponding base assembly 21 and the corresponding connecting rod 11 is completed.

Base subassembly 21 is swing joint with being connected of connective bar 11 in this scheme, can make things convenient for base subassembly 21 installation and dismantlement on connective bar 11, and joint strength can adjust in real time as required, both can transfer the pine and also can tighten up, and it is safe convenient to adjust.

In addition, the support rod 212 is connected with the first sliding block 214 like the matching of a screw rod and a nut, the hook arm 211 is locked on the connecting rod 11 through the rotation of the support rod 212, and the adjusting precision is high.

In a specific embodiment of the present disclosure, a connecting block 216 is disposed in the middle of the sliding beam 213, and a sliding hole is formed in the connecting block 216, and an axis of the sliding hole is parallel to the driving direction of the second linear driving assembly 232.

The connection block 216 provides a mounting base for the second linear drive assembly 232.

In the present embodiment, the second linear driving assembly 232 includes a first fixed block 2321, a first lead screw 2322 and a guide bar 2323.

As shown in fig. 1, 3, 4 and 10, the number of the first lead screws 2322 is one, the number of the guide rods 2323 is two, the first lead screws 2322 are parallel to the guide rods 2323, the first lead screws 2322 are located between the two guide rods 2323, the first ends of the guide rods 2323 and the first lead screws 2322 in the axial direction penetrate through the sliding holes to be connected with the first linear driving assembly 231, the second ends of the guide rods 2323 and the first lead screws 2322 in the axial direction are connected with the first fixed block 2321, and the first fixed block 2321 is provided with a fourth threaded hole matched with the first lead screws 2322.

Preferably, the number of the sliding holes on the connecting block 216 is three, and the sliding holes correspond to the positions of the first lead screw 2322 and the guide rod 2323 respectively.

The driving process of the second linear drive assembly 232 is as follows:

the first lead screw 2322 rotates in the fourth threaded hole of the first fixed block 2321, so that the first fixed block 2321 moves along the axis of the first lead screw 2322, and then the first fixed block 2321 drives the guide rod 2323 connected to the first lead screw to move, the guide rod 2323 drives the first linear driving assembly 231 connected to the first lead screw to move, and finally the first linear driving assembly 231 drives the connecting rod 223 to move along the axis direction of the connecting rod 11.

The second linear driving assembly 232 can drive the connecting rod 223 to move toward the occipital plate 12 and drive the connecting rod 223 to move away from the occipital plate 12, i.e., the inclination angle between the occipital plate 12 and the connecting rod 11 can be increased, and the inclination angle between the occipital plate 12 and the connecting rod 11 can be decreased.

The second linear driving assembly 232 is driven by the first lead screw 2322, so that the adjusting precision of the inclination angle between the occipital plate 12 and the connecting rod 11 is high.

In one embodiment of the present disclosure, as shown in fig. 10, the second linear driving assembly 232 further includes a second fixed block 2324, and the second fixed block 2324 is connected to the first linear driving assembly 231.

The design of the second fixed block 2324 provides a mounting basis for the mounting of the second linear drive assembly 232 on the first linear drive assembly 231. In order to fix the first lead screw 2322 and the guide rod 2323, three first mounting holes are formed in the second fixing block 2324, and the positions of the three first mounting holes correspond to the positions of the first lead screw 2322 and the two guide rods 2323 respectively.

In order to improve the connection strength between the second fixed block 2324 and the first linear driving assembly 231, the second fixed block 2324 is provided with a reinforcing plate 2325.

The second linear driving assembly 232 in this embodiment is not limited to the above structure, and may also be another structure capable of driving the first linear driving assembly 231 to move along the direction parallel to the connecting rod 11, and the specific structure is not limited herein and is selected by a person skilled in the art according to actual needs.

As shown in fig. 10 and 11, the reinforcing plate 2325 is a triangular prism plate, and two right-angled surfaces of the reinforcing plate 2325 are connected to the first linear driving assembly 231 and the second fixed block 2324, respectively.

The number of the reinforcing plates 2325 is two, and the reinforcing plates are symmetrically distributed on both sides of the second fixed block 2324.

In order to prevent the first slider 214 from being separated from the sliding beam 213, the present embodiment provides a first limit bolt 217 at an end of the sliding beam 213. As shown in fig. 5, the first stopper bolt 217 is coaxially arranged with the sliding beam 213, and the diameter of the bolt head of the first stopper bolt 217 is larger than that of the sliding beam 213.

In one embodiment of the present embodiment, the sliding beam 213 is a rectangular parallelepiped sliding beam 213, and the rectangular parallelepiped sliding beam 213 enables the first slider 214 to slide along the axial direction of the sliding beam 213 but not to rotate around the circumferential direction of the sliding beam 213.

In one embodiment of the present solution, as shown in fig. 1, 3, 4 and 10, the first linear driving assembly 231 includes a third fixing block 2311 and a second lead screw 2312.

A slide way perpendicular to the connecting rod 223 is formed in the third fixing block 2311, the connecting rod 223 transversely penetrates through the slide way, and the connecting rod 223 can move in the slide way in the direction perpendicular to the connecting rod 11;

the side wall of the third fixing block 2311 is connected with the right-angle surface of the reinforcing plate 2325;

the third fixing block 2311 is provided with a second mounting hole which is coaxial with the slide way, the first end of the second lead screw 2312 in the axial direction is inserted into the slide way through the second mounting hole and is connected with the connecting rod 223, the connecting rod 223 is provided with a fifth threaded hole matched with the second lead screw 2312, and the second end of the second lead screw 2312 in the axial direction is located outside the slide way.

The second lead screw 2312 rotates in the fifth threaded hole, the connecting rod 223 moves along the axis direction of the second lead screw 2312, the first draw hook 221 and the second draw hook 222 connected with the connecting rod 223 move in the direction perpendicular to the connecting rod 11, and the first draw hook 221, the second draw hook 222 and the occipital bone screw 4 are matched.

The mode that the screw rod drives the connecting rod 223 to move up and down is adopted, the structure is simple, and the adjusting precision is high.

As shown in fig. 10, the third fixing block 2311 is a rectangular parallelepiped fixing block, the slide way is formed along the length extending direction of the rectangular parallelepiped fixing block, and does not penetrate through the end face of the rectangular parallelepiped fixing block in the length direction, but rectangular through holes are formed in two side faces parallel to the axis and oppositely arranged, so that the movement of the connecting rod 223 in the third fixing block 2311 can be observed conveniently, and one of the two other side faces parallel to the axial direction and oppositely arranged of the third fixing block 2311 is connected to the second linearity determining component 232.

In order to improve the stability of the movement of the connecting rod 223 within the slide, the first linear driving assembly 231 of the present disclosure further includes a second slider 2313, and the shape of the second slider 2313 is the same as the cross-sectional shape of the slide.

In order to facilitate the connection of the connecting rod 223 with the second slider 2313, the connecting rod 223 of the present scheme is a first connecting rod and a second connecting rod which are separately arranged, and the first connecting rod and the second connecting rod are coaxially arranged. One end of the first connecting rod is connected to the first hook 221, the other end of the first connecting rod is connected to one of the turning blocks 224, one end of the second connecting rod is connected to the second hook 222, and the other end of the second connecting rod is connected to the other turning block 224. Preferably, the first and second connecting rods are cylindrical connecting rods 223.

During connection, the second slider 2313 is located between the first connecting rod and the second connecting rod and is connected with the first connecting rod and the second connecting rod, and after connection is completed, the first connecting rod and the second connecting rod are coaxial.

In order to facilitate the connection between the second slider 2313 and the second lead screw 2312, a fifth threaded hole is formed in the second slider 2313, the second lead screw 2312 is connected with the second slider 2313 through the fifth threaded hole, and the second lead screw 2312 rotates to drive the second slider 2313 to slide along the slide way.

The first linear driving assembly 231 in the present embodiment is not limited to the above structure, and may be other structures capable of driving the connecting rod 223 to move in a direction perpendicular to the connecting rod 11, and the specific structure is not limited herein and is selected by a person skilled in the art according to actual needs.

The end parts of the first lead screw 2322 and the second lead screw 2312 in the scheme are both provided with knobs, so that the first lead screw 2322 and the second lead screw 2312 can be conveniently screwed to rotate.

In order to avoid the sliding-off of the rotating block 224 from the connecting rod 223, the two ends of the connecting rod 223 are respectively provided with a second limiting bolt 226, the second limiting bolt 226 and the connecting rod 223 are coaxially arranged, the diameter of the bolt head of the second limiting bolt 226 is larger than that of the connecting rod 223, and the bolt head of the second limiting bolt 226 limits the rotating block 224.

In order to facilitate the angle adjustment of the occipital bone screws 4, the occipital bone plate 12 is provided with a plurality of third mounting holes matched with the occipital bone screws 4, and the third mounting holes are sequentially arranged along the length direction of the occipital bone plate. During operation, a doctor can determine which third mounting hole the occipital screw 4 is mounted in according to the occipital condition of a patient, so that the universality of the occipital plate 12 is improved.

Preferably, the third mounting hole is a strip-shaped mounting hole, and when the occipital screw 4 is connected with the occipital bone, the position of the occipital screw 4 in the third mounting hole can be finely adjusted, so that the universality of the occipital plate 12 is further improved, and the difficulty in matching the occipital plate 12 with the occipital screw 4 is reduced.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A posterior reduction internal fixation system is characterized by comprising two vertebral orthopedic rods (1) which are arranged in parallel and an adjusting device (2),

the vertebral body orthopedic rod (1) comprises a connecting rod (11) and an occipital plate (12),

the connecting rod (11) can be connected with the pedicles on the same side of at least two vertebral bodies from the third vertebral body to the seventh vertebral body through the pedicle screws (3);

the occipital plate (12) can be connected with the occiput through occipital screws (4), the occipital plate (12) is arranged along the length extension direction of the connecting rod (11) and is connected with the connecting rod (11), and the occipital plate (12) is obliquely arranged relative to the connecting rod (11);

the adjusting device (2) is used for adjusting the inclination angle of the occipital plate (12) relative to the connecting rod (11), the adjusting device (2) comprises a base component (21), a connecting component (22) and a fine adjusting component (23),

the base component (21) is connected with the connecting rod (11);

the connecting component (22) comprises a first draw hook (221), a second draw hook (222) and a connecting rod (223),

the connecting rod (223) is perpendicular to the connecting rod (11),

the first draw hook (221) and the second draw hook (222) are parallel and perpendicular to the connecting rod (223), the hook ends of the first draw hook (221) and the second draw hook (222) are respectively connected with the two occipital bone screws (4), the fixed ends of the first draw hook (221) and the second draw hook (222) are connected with the connecting rod (223) through a rotating block (224), a first threaded hole is formed in the rotating block (224), and a first locking bolt (225) used for locking the rotating block (224) on the connecting rod (223) is arranged in the first threaded hole;

the fine adjustment assembly (23) comprises a first linear drive assembly (231) and a second linear drive assembly (232),

the first linear driving assembly (231) is connected with the connecting rod (223) and used for driving the connecting rod (223) to move along the direction vertical to the connecting rod (11) and adjusting the angle between the first draw hook (221) and the second draw hook (222) and the occipital bone screw (4),

a second linear drive assembly (232) is connected to the first linear drive assembly (231) for driving the first linear drive assembly (231) in a direction parallel to the connecting rod (11) for adjusting the tilt angle between the occipital plate (12) and the connecting rod (11), the second linear drive assembly (232) being mounted on the base assembly (21).

2. The posterior reduction internal fixation system of claim 1, wherein the base assembly (21) comprises a hook arm (211), a support bar (212), a sliding beam (213), and a first slider (214),

the sliding beam (213) is perpendicular to the connecting rod (11),

the number of the first sliding blocks (214) is two, the first sliding blocks (214) are arranged at two ends of the sliding beam (213) in the length direction in a sliding mode, second threaded holes are formed in the first sliding blocks (214), second locking bolts (215) are arranged in the second threaded holes, the first sliding blocks (214) are locked on the sliding beam (213) through the second locking bolts (215), third threaded holes are formed in the first sliding blocks (214), threaded sections matched with the third threaded holes are arranged at first ends of the supporting rods (212) in the length direction, first ends of the supporting rods (212) are connected to the first sliding blocks (214) through the threaded sections, second ends of the supporting rods (212) in the length direction can abut against screw plugs of the pedicle screws (3), at least two hook arms (211) are arranged on each first sliding block (214), the hook arm (211) with the bracing piece (212) is parallel, the length direction's of hook arm (211) first end with first slider (214) are connected, the length direction's of hook arm (211) second end is provided with can carry and draws the crotch of connective bar (11).

3. The posterior resetting internal fixation system according to claim 2, wherein a connecting block (216) is arranged in the middle of the sliding beam (213), a sliding hole is formed in the connecting block (216), and the axial direction of the sliding hole is parallel to the driving direction of the second linear driving assembly (232);

the second linear driving component (232) comprises a first fixed block (2321), a first lead screw (2322) and a guide rod (2323),

the number of the guide rods (2323) is two, the first lead screw (2322) is located between the two guide rods (2323) and is parallel to the guide rods (2323), the first ends of the guide rods (2323) and the first lead screw (2322) in the axial direction penetrate through the sliding holes to be connected with the first linear driving assembly (231), the second ends of the guide rods (2323) and the first lead screw (2322) in the axial direction are connected with the first fixing block (2321), and a fourth threaded hole matched with the first lead screw (2322) is formed in the first fixing block (2321).

4. The posterior reduction internal fixation system according to claim 3, wherein the second linear driving assembly (232) further comprises a second fixed block (2324) connected to the first linear driving assembly (231), and the second fixed block (2324) is provided with three first mounting holes corresponding to the guide bar (2323) and the second lead screw (2312).

5. The posterior resetting internal fixation system according to claim 4, wherein a reinforcing plate (2325) is arranged on the second fixed block (2324), the reinforcing plate (2325) is a right-angled triangular prism plate, and two right-angled surfaces of the reinforcing plate (2325) are respectively connected with the first linear driving assembly (231) and the second fixed block (2324).

6. The posterior reduction internal fixation system of claim 2, wherein the end of the sliding beam (213) is provided with a first limit bolt (217) for limiting the first slider (214).

7. The posterior reduction internal fixation system of claim 5, wherein the first linear drive assembly (231) comprises a third fixation block (2311) and a second lead screw (2312),

a slide way perpendicular to the connecting rod (223) is formed in the third fixing block (2311), the connecting rod (223) transversely penetrates through the slide way, a second mounting hole coaxial with the slide way is formed in the third fixing block (2311), and the side wall of the third fixing block (2311) is connected with the right-angle surface of the reinforcing plate (2325);

the first end of the second lead screw (2312) in the axial direction is inserted into the slideway through the second mounting hole and is connected with the connecting rod (223), a fifth threaded hole matched with the second lead screw (2312) is formed in the connecting rod (223), and the second end of the second lead screw (2312) in the axial direction is located outside the slideway.

8. The posterior reduction internal fixation system according to claim 7, wherein the connecting rods (223) comprise a first connecting rod and a second connecting rod coaxially arranged, and two rotating blocks (224) are respectively disposed on the first connecting rod and the second connecting rod,

the first linear driving assembly (231) further comprises a second sliding block (2313) which is located between the first connecting rod and the second connecting rod and connected with the first connecting rod and the second connecting rod, the second sliding block (2313) is provided with a fifth threaded hole, and the second lead screw (2312) is connected with the second sliding block (2313) through the fifth threaded hole to drive the second sliding block (2313) to slide along the slide way.

9. The posterior reduction internal fixation system according to claim 1, wherein both ends of the connecting rod (223) are provided with second limit bolts (226) for limiting the rotation block (224).

10. The posterior reduction internal fixation system according to claim 1, wherein the occipital plate (12) is formed with a plurality of third mounting holes for engaging with the occipital screws (4), the plurality of third mounting holes are sequentially formed along the length direction of the occipital plate (12), and the third mounting holes are elongated.