CN113576634A - Anterior cervical fixation plate and system - Google Patents
Anterior cervical fixation plate and system Download PDFInfo
- Publication number
- CN113576634A CN113576634A CN202110412057.2A CN202110412057A CN113576634A CN 113576634 A CN113576634 A CN 113576634A CN 202110412057 A CN202110412057 A CN 202110412057A CN 113576634 A CN113576634 A CN 113576634A
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- Prior art keywords
- plate body
- plate
- swing arm
- anterior cervical
- blocking piece
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- 230000000903 blocking effect Effects 0.000 claims abstract description 89
- 230000004927 fusion Effects 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims description 6
- 210000003781 tooth socket Anatomy 0.000 claims 2
- 239000007943 implant Substances 0.000 abstract description 2
- 230000000399 orthopedic effect Effects 0.000 abstract description 2
- 230000011164 ossification Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 210000005036 nerve Anatomy 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 210000000278 spinal cord Anatomy 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000016285 Movement disease Diseases 0.000 description 1
- 208000009469 Ossification of Posterior Longitudinal Ligament Diseases 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000862 numbness Toxicity 0.000 description 1
- 201000002044 ossification of the posterior longitudinal ligament of spine Diseases 0.000 description 1
- 208000001040 ossification of the posterior longitudinal ligament of the spine Diseases 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 208000020431 spinal cord injury Diseases 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7059—Cortical plates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8033—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers
- A61B17/8042—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates having indirect contact with screw heads, or having contact with screw heads maintained with the aid of additional components, e.g. nuts, wedges or head covers the additional component being a cover over the screw head
Abstract
The invention discloses a cervical vertebra anterior fixing plate and a system, belonging to the technical field of orthopedic implants, wherein the cervical vertebra anterior fixing plate comprises a plate body, vertebral body connecting screw holes are arranged at two longitudinal sides of the plate body, a fusion device connecting screw hole is arranged at the middle part of the plate body, and a first blocking piece and a second blocking piece are arranged on the plate body in parallel along the length direction, wherein: at least one first swing arm is arranged on the plate body aiming at the first blocking piece, one end of the first swing arm is movably connected with the plate body, and the other end of the first swing arm is hinged with the first blocking piece to form a parallelogram structure with the first blocking piece; at least one second swing arm is arranged on the plate body aiming at the second baffle, one end of the second swing arm is movably connected with the plate body, and the other end of the second swing arm is hinged with the second baffle to form a parallelogram structure with the second baffle. The invention does not need to carry out anti-backing locking on the vertebral body connecting screws one by one, does not need longer operation time, is convenient to operate, can quickly realize the anti-backing locking of the vertebral body connecting screws and reduces the operation risk.
Description
Technical Field
The invention relates to the technical field of orthopedic implants, in particular to an anterior cervical fixing plate and a system.
Background
Cervical posterior longitudinal ligament Ossification (OPLL) is a common clinical disease, and the specific operations include anterior, posterior and anterior-posterior combined operations of cervical vertebra. Such as posterior cervical vertebroplasty, cervical laminoplasty, anterior cervical vertebral subtotal resection, etc., each of which has advantages and disadvantages.
Anterior surgery: the ossification can be directly cut to achieve the purpose of effective radical treatment, but the technical requirement is high, the risk is large, and if the thickness of the ossification exceeds 5mm, the front operation is not suitable.
Posterior surgery: the safety is high, but the complete blood supply in the vertebral canal is damaged, the spinal cord rehabilitation is not facilitated, the ossification cannot be cut off, the effect of relieving the mild illness condition can be achieved only through indirect decompression, and the operation curative effect is difficult to ensure; the spinal cord drifts backwards after posterior decompression, and nerve roots may be excessively pulled, which causes postoperative nerve root paralysis, pain and numbness of the upper limbs and movement disorder.
The ACAF (anterior cervical vertebral body ossification complex forward movement fusion) operation technology is based on the concept of ossification forward movement, the anatomical shaping of the vertebral canal is completed, the purpose of pressure reduction is achieved, the risk of directly cutting ossification is avoided, the risk and difficulty of the anterior operation are greatly reduced, and the complication of cerebrospinal leakage and spinal cord injury is greatly reduced.
The existing ACAF anterior cervical fixing plate system usually comprises a anterior cervical plate body and a plurality of fusion devices, wherein the general span sections of the anterior cervical plate body are more, a plurality of groups of centrum connecting screw holes are arranged on the longitudinal two sides of the anterior cervical plate body, centrum connecting screws are arranged in the centrum connecting screw holes, a fusion device (cage) connecting screw hole is arranged in the middle of the anterior cervical plate body, and a fusion device connecting screw used for connecting the rear part of the fusion device is arranged in the fusion device connecting screw hole.
The inventor finds that due to the fact that the number of the vertebral body connecting screws is large, if the vertebral body connecting screws are prevented from being retreated and locked one by one according to the prior art, long operation time is needed, and operation risks are increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anterior cervical fixing plate and a system which can quickly realize anti-back locking of a vertebral body connecting screw.
In order to solve the technical problems, the invention provides the following technical scheme:
on the one hand, provide a cervical vertebra front fixing plate, the package rubbing board body, the vertical both sides of plate body are equipped with centrum connecting screw hole, the middle part of plate body is equipped with fuses ware connecting screw hole, be equipped with first separation blade and second separation blade on the plate body along length direction side by side, wherein:
the plate body is provided with at least one first swing arm aiming at the first blocking piece, one end of the first swing arm is movably connected with the plate body, the other end of the first swing arm is hinged with the first blocking piece to form a parallelogram structure with the first blocking piece, and the first blocking piece can move between a blocking position and a yielding position in a vertebral body connecting screw hole on one side of the plate body by swinging the first swing arm;
at least one second swing arm is arranged on the plate body aiming at the second baffle, one end of the second swing arm is movably connected with the plate body, the other end of the second swing arm is hinged with the second baffle to form a parallelogram structure with the second baffle, and the second baffle can be moved between the blocking position and the abdicating position through the swinging of the second swing arm and the vertebral body connecting screw hole on the other side of the plate body.
The first swing arm and the second swing arm are integrally arranged to form a rotating arm, and the middle of the rotating arm is connected with the plate body.
Furthermore, the rotating arms are two, and the two rotating arms are respectively located at two ends of the plate body.
Furthermore, a threaded hole is formed in the plate body, a screw mounting hole is formed in the rotating arm, and the rotating arm is mounted on the plate body through a locking screw penetrating through the screw mounting hole.
Furthermore, the lower surface of the head of the locking screw is a plane, a radial convex tooth is arranged on the plane, an annular tooth groove matched with the radial convex tooth is arranged on the rotating arm, and the annular tooth groove is formed by more than two radial convex teeth dug on the rotating arm.
Furthermore, a protruding piece protruding towards the side edge is arranged at the position of each centrum connecting screw hole on the corresponding side of the first blocking piece and the second blocking piece.
Furthermore, a longitudinal groove used for containing the first blocking piece and the second blocking piece is dug in the middle of the plate body.
Furthermore, a semicircular opening used for avoiding the vertebral body connecting screw in the vertebral body connecting screw hole is formed in the inner side of the longitudinal groove.
On the other hand, the anterior cervical fixing plate system comprises an anterior cervical fixing plate, a fusion device and a vertebral body connecting screw, wherein the anterior cervical fixing plate is the anterior cervical fixing plate.
Furthermore, the vertebral body connecting screws are arranged in the vertebral body connecting screw holes of the cervical vertebra anterior fixing plate, and the spiral directions of the vertebral body connecting screws on the two longitudinal sides of the plate body are opposite.
The invention has the following beneficial effects:
the cervical vertebra anterior fixing plate and the system comprise a plate body, wherein a first blocking piece and a second blocking piece are arranged on the plate body in parallel along the length direction, at least one first swing arm is arranged on the plate body aiming at the first blocking piece, and the first blocking piece can move between a blocking position and a release position of a vertebral body connecting screw hole on one side of the plate body by swinging the first swing arm; at least one second swing arm is arranged on the plate body aiming at the second blocking piece, and the second blocking piece can be moved between the blocking position and the yielding position through swinging the second swing arm at the vertebral body connecting screw hole on the other side of the plate body. The invention does not need to carry out anti-backing locking on the vertebral body connecting screws one by one, does not need longer operation time, is convenient to operate, can quickly realize the anti-backing locking of the vertebral body connecting screws and reduces the operation risk.
Drawings
FIG. 1 is a schematic view of the overall structure of an anterior cervical fixation plate system of the present invention;
FIG. 2 is a schematic view of the anterior cervical fixation plate system of FIG. 1 with the first and second baffles removed;
FIG. 3 is an end view of the anterior cervical fixation plate system of FIG. 1;
fig. 4 is a schematic view of the initial positions of the first blocking plate and the second blocking plate on the plate body in the anterior cervical fixing plate system of the invention;
fig. 5 is a schematic structural view of a plate body of the anterior cervical fixation plate system of the present invention, wherein (a) is a side view in one direction, (b) is a front view, (c) is a side view in another direction, and (b) and (c) are temporarily shown without cage attachment screw holes;
fig. 6 is a schematic structural view of a first blocking plate in the anterior cervical fixing plate system of the present invention, wherein (a) is a side view and (b) is a front view;
fig. 7 is a schematic structural view of a locking screw in the anterior cervical fixation plate system of the present invention, wherein (a) is a front view, (b) is a top view, and (c) is a perspective view;
fig. 8 is a schematic structural view of a rotating arm in the anterior cervical fixing plate system of the present invention, wherein (a) is a front view, (b) is a side view, and (c) is a perspective view;
fig. 9 is a schematic structural view of a ball-type cap in an anterior cervical fixation plate system of the present invention, wherein (a) is a front view, (b) is a top view, and (c) is a perspective view;
fig. 10 is a schematic structural view of a cage attachment screw in the anterior cervical fixation plate system of the present invention, wherein (a) is a front view and (b) is a perspective view;
FIG. 11 is a schematic structural view of a fusion cage in the anterior cervical fixation plate system of the present invention;
fig. 12 is a cross-sectional view of a cage attachment screw hole in an anterior cervical fixation plate system of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
In one aspect, the present invention provides an anterior cervical fixing plate, as shown in fig. 1 to 12, including a plate body 1, vertebral body connecting screw holes 11 are disposed on two longitudinal (length direction, i.e. arrow direction in fig. 1) sides of the plate body 1, a fusion device connecting screw hole 12 is disposed in the middle of the plate body 1, and a first blocking plate 13 and a second blocking plate 13' are disposed on the plate body 1 in parallel along the length direction, wherein:
at least one first swing arm 5 is arranged on the plate body 1 aiming at the first blocking piece 13 (in the embodiment shown in the figure, two ends of the first blocking piece 13 are respectively provided with one first swing arm 5), one end of the first swing arm 5 is movably connected with the plate body 1, the other end of the first swing arm 5 is hinged with the first blocking piece 13 so as to form a parallelogram structure with the first blocking piece 13, and the first blocking piece 13 can move between a blocking position and a yielding position in a vertebral body connecting screw hole 11 on one side of the plate body 1 by swinging the first swing arm 5;
at least one second swing arm 5 ' is arranged on the plate body 1 aiming at the second baffle 13 ' (in the embodiment shown in the figure, one first swing arm 5 ' is arranged at each of two ends of the first baffle 13 '), one end of the second swing arm 5 ' is movably connected with the plate body 1, the other end of the second swing arm is hinged with the second baffle 5 ' to form a parallelogram structure with the second baffle 13 ', and the second baffle 13 ' can move between the blocking position and the abdicating position by swinging the second swing arm 2 '.
Initially, the first blocking piece 13 and the second blocking piece 13 ' are both located at the yielding position (specifically, as shown in fig. 4, the middle part of the plate body 1 does not block the vertebral body connection screw hole 11), and during use, the first swing arm 5 and the second swing arm 5 ' are driven, and the first swing arm 5 and the second swing arm 5 ' drive the first blocking piece 13 and the second blocking piece 13 ' to move towards the blocking position (namely, the longitudinal two sides of the plate body 1), so that the first blocking piece 13 and the second blocking piece 13 ' block the vertebral body connection screws 2 (as shown in fig. 1) on the longitudinal two sides of the plate body 1.
The cervical vertebra anterior fixing plate comprises a plate body, wherein a first blocking piece and a second blocking piece are arranged on the plate body in parallel along the length direction, at least one first swing arm is arranged on the plate body aiming at the first blocking piece, and the first blocking piece can move between a blocking position and a receding position in a vertebral body connecting screw hole on one side of the plate body by swinging the first swing arm; at least one second swing arm is arranged on the plate body aiming at the second blocking piece, and the second blocking piece can be moved between the blocking position and the yielding position through swinging the second swing arm at the vertebral body connecting screw hole on the other side of the plate body. The invention does not need to carry out anti-backing locking on the vertebral body connecting screws one by one, does not need longer operation time, is convenient to operate, can quickly realize the anti-backing locking of the vertebral body connecting screws and reduces the operation risk.
As shown in fig. 1-2, in order to facilitate driving the first blocking piece 13 and the second blocking piece 13 ', the first swing arm 5 and the second swing arm 5 ' are integrally disposed to form two swing arms (an integral structure), in the embodiment shown in the figure, the two swing arms are respectively located at two ends of the plate body 1, and at this time, the two swing arms, the first blocking piece 13 and the second blocking piece 13 ' form a parallelogram hinge structure, and the middle portions of the swing arms are connected to the plate body 1. In the embodiment shown in the figures, A, B is a hinge shaft of one of the rotating arms and the first and second flaps 13 and 13 ', respectively, and C, D is a hinge shaft of the other rotating arm and the first and second flaps 13 and 13', respectively.
In order to install the rotating arm on the plate body 1, a threaded hole 14 is formed in the plate body 1, a screw mounting hole is formed in the rotating arm, the rotating arm is installed on the plate body 1 through a locking screw 52 penetrating through the screw mounting hole, on one hand, the rotating arm can be installed on the plate body 1 through the locking screw 52, on the other hand, the rotating arm can be locked after the first blocking piece 13 and the second blocking piece 13 'are driven to move by the rotating arm, and therefore the first blocking piece 13 and the second blocking piece 13' are also locked on the plate body 1.
As shown in fig. 1 and fig. 7-8, the lower surface of the head of the locking screw 52 may be a plane, the plane may be provided with a radial protruding tooth 521, the rotating arm is provided with an annular tooth slot 51 matched with the radial protruding tooth 521, and the annular tooth slot 51 may be specifically formed by more than two radial protruding teeth dug on the rotating arm.
When the anti-loosening device is used, the locking screw 52 is screwed into the threaded hole 14 on the plate body 1 by using an instrument, initially, the radial convex tooth 521 on the head of the locking screw 52 is not meshed with the annular tooth groove 51 on the rotating arm, after the locking screw 52 is screwed into the plate body 1 for a certain distance, the radial convex tooth 521 on the head of the locking screw 52 is meshed with the annular tooth groove 51 on the rotating arm, at the moment, the locking screw 52 is screwed in continuously, the rotating arm is driven to rotate by the locking screw 52, so that the first blocking piece 13 and the second blocking piece 13' which are positioned at the opening position are respectively moved towards the shielding position, when the two blocking pieces shield the vertebral body connecting screw holes 11 at the two longitudinal sides of the plate body 1 (the position shown in figure 1), the rotating arm and the two blocking pieces are kept still, and the locking screw 52 is rotated continuously until the anti-loosening structure is completely locked. The radial convex teeth on the rotating arm are formed by digging, so that the product can be ensured to have lower incisional marks integrally.
In order to better shield the vertebral body connecting screw hole 11, the first blocking plate 13 and the second blocking plate 13' may be provided with a protruding piece 131 protruding towards the side edge at a position corresponding to each vertebral body connecting screw hole 11 on the side surface.
As shown in fig. 1-2, to further reduce the cut, the middle of the plate body 1 may be hollowed with a longitudinal groove 15 for accommodating the first and second catches 13, 13'. Moreover, the inner side of the longitudinal groove 15 may be provided with a semicircular open hole 151 for avoiding the vertebral body connection screw 2, and correspondingly, the protruding piece 131 on the first blocking piece 13 and the second blocking piece 13 'is preferably semicircular, so that when the first blocking piece 13 and the second blocking piece 13' respectively move towards two longitudinal sides of the plate body 1 (due to the parallelogram hinge structure, in this case, the oblique movement), the protruding piece 131 on the first blocking piece 13 and the second blocking piece 13 'are gradually clamped (due to the oblique movement, there is frictional resistance) into the semicircular open hole 151 on two longitudinal sides of the plate body 1, the semicircular open hole 151 and the protruding piece 131 form a clamping structure, when the vertebral body connection screw 2 is forced to retreat backwards, it needs to push the first blocking piece 13 and the second blocking piece 13' away from the vertebral body connection screw hole 11, at this time, the clamping structure formed by the semicircular open hole 151 of the longitudinal groove 15 and the protruding piece 131 on the blocking piece will prevent the blocking piece from shifting, for the scheme that only relies on locking screw 52 at plate body 1 both ends to lock like this, this mode is owing to formed the joint structure, can improve the fastness of first separation blade 13 and second separation blade 13' greatly, increases and prevents moving back the effect.
On the other hand, the invention provides an anterior cervical fixing plate system, which comprises an anterior cervical fixing plate, a fusion device 3 and a vertebral body connecting screw 2, wherein the anterior cervical fixing plate is the anterior cervical fixing plate, and the structure of the anterior cervical fixing plate is the same as that of the anterior cervical fixing plate, so the details are not repeated herein.
The anterior cervical vertebra fixing plate system comprises a plate body, wherein a first blocking piece and a second blocking piece are arranged on the plate body in parallel along the length direction, at least one first swing arm is arranged on the plate body aiming at the first blocking piece, and the first blocking piece can move between a blocking position and a receding position of a vertebral body connecting screw hole on one side of the plate body by swinging the first swing arm; at least one second swing arm is arranged on the plate body aiming at the second blocking piece, and the second blocking piece can be moved between the blocking position and the yielding position through swinging the second swing arm at the vertebral body connecting screw hole on the other side of the plate body. The invention does not need to carry out anti-backing locking on the vertebral body connecting screws one by one, does not need longer operation time, is convenient to operate, can quickly realize the anti-backing locking of the vertebral body connecting screws and reduces the operation risk.
As shown in fig. 3, the vertebral body connection screw 2 is installed in the vertebral body connection screw hole 11 of the anterior cervical fixing plate, and the preferred directions of the spiral of the vertebral body connection screw 2 on the longitudinal two sides of the plate body 1 are opposite, so that when the vertebral body connection screw 2 is subjected to a torque in a certain direction, the vertebral body connection screw 2 on one side is ensured to be in a locking state, and the vertebral body connection screw 2 is prevented from withdrawing.
As shown in fig. 9-10 and 12, the inner sidewall of the fusion cage connecting screw hole 12 is provided with a positioning groove 121 (the positioning groove 121 has upper and lower sidewalls/closing-in structures, so that the annular protrusion 61 on the outer surface of the spherical cap 6 is blocked by the upper and lower sidewalls/closing-in structures after being clamped in the positioning groove 121, and thus cannot be removed from the upper and lower directions), the spherical cap 6 is provided on the screw head of the fusion cage connecting screw 4, and the annular protrusion 61 matched with the positioning groove 121 is provided on the outer surface of the spherical cap 6.
During the equipment, can block into the annular arch 61 of ball-type cap 6 earlier in positioning groove 121, pass ball-type cap 6 with the afterbody of fusing ware connecting screw 4 again and be connected with fusing ware 3, like this when fusing ware connecting screw 4 and fuse ware 3 and be connected the back, positioning groove 121 cooperatees with annular arch 61 and makes the screwhead of fusing ware connecting screw 4 as the fulcrum, adjustable fuse ware 3 fore-and-aft direction and plate body 1 within a definite time apart from the distance to can be according to the nimble convenient regulation 3 positions of fusing ware of needs in the art.
Further, the inner side of the spherical cap 6 may be provided with a threaded hole 62 with an internal thread, and the head of the fusion device connection screw 4 is provided with an external thread 42 matched with the internal thread, so that the fusion device connection screw 4 and the spherical cap 6 are connected together by matching the internal thread with the external thread 42. The threaded hole of the spherical cap 6 and the screw head of the fusion device connecting screw 4 can be both in a taper shape with a big top and a small bottom.
To facilitate the positional adjustment of the fusion cage 3 in the longitudinal direction of the plate body 1, the fusion cage coupling screw hole 12 may be a longitudinally elongated hole (as shown in fig. 1 and 2). Also, the height of the positioning groove 121 is preferably greater than the thickness of the annular protrusion 61, so that the annular protrusion 61 can swing within the positioning groove 121 to facilitate fine adjustment of the position of the fusion cage 3.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a cervical vertebra front fixing plate, the package rubbing board body, the vertical both sides of plate body are equipped with centrum connecting screw hole, the middle part of plate body is equipped with fuses ware connecting screw hole, a serial communication port, be equipped with first separation blade and second separation blade on the plate body along length direction side by side, wherein:
the plate body is provided with at least one first swing arm aiming at the first blocking piece, one end of the first swing arm is movably connected with the plate body, the other end of the first swing arm is hinged with the first blocking piece to form a parallelogram structure with the first blocking piece, and the first blocking piece can move between a blocking position and a yielding position in a vertebral body connecting screw hole on one side of the plate body by swinging the first swing arm;
at least one second swing arm is arranged on the plate body aiming at the second baffle, one end of the second swing arm is movably connected with the plate body, the other end of the second swing arm is hinged with the second baffle to form a parallelogram structure with the second baffle, and the second baffle can be moved between the blocking position and the abdicating position through the swinging of the second swing arm and the vertebral body connecting screw hole on the other side of the plate body.
2. The anterior cervical fixation plate of claim 1, wherein the first and second swing arms are integrally formed as a rotating arm, and the middle portion of the rotating arm is connected to the plate body.
3. The anterior cervical fixation plate of claim 2, wherein there are two rotation arms, and the two rotation arms are respectively located at two ends of the plate body.
4. The anterior cervical fixing plate according to claim 2, wherein the plate body is provided with a threaded hole, the rotating arm is provided with a screw mounting hole, and the rotating arm is mounted on the plate body through a locking screw inserted into the screw mounting hole.
5. The anterior cervical fixing plate according to claim 4, wherein the lower surface of the head of the locking screw is a plane on which radial protruding teeth are provided, the rotating arm is provided with an annular tooth socket which is matched with the radial protruding teeth, and the annular tooth socket is formed by more than two radial protruding teeth dug on the rotating arm.
6. The anterior cervical fixation plate of any one of claims 1 to 5, wherein the first and second retaining plates are provided with a protruding piece protruding towards the side edge at a position corresponding to each side of the vertebral body connecting screw hole.
7. The anterior cervical fixation plate of any one of claims 1-5, wherein the plate body is hollowed at a middle portion thereof with a longitudinal groove for receiving the first and second blocking tabs.
8. The anterior cervical fixation plate of claim 7 wherein the longitudinal groove is provided on an inner side with a semi-circular opening for avoiding vertebral connection screws in the vertebral connection screw hole.
9. An anterior cervical fixation plate system comprising an anterior cervical fixation plate, a fusion cage, and a vertebral body attachment screw, wherein the anterior cervical fixation plate is according to any one of claims 1-8.
10. An anterior cervical fixation plate system according to claim 9, wherein vertebral body attachment screws are mounted in vertebral body attachment screw holes of the anterior cervical fixation plate, the plate body longitudinally flanking the vertebral body attachment screws in opposite helical directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110412057.2A CN113576634A (en) | 2021-04-16 | 2021-04-16 | Anterior cervical fixation plate and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110412057.2A CN113576634A (en) | 2021-04-16 | 2021-04-16 | Anterior cervical fixation plate and system |
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| CN113576634A true CN113576634A (en) | 2021-11-02 |
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| CN202110412057.2A Pending CN113576634A (en) | 2021-04-16 | 2021-04-16 | Anterior cervical fixation plate and system |
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| CN108720916A (en) * | 2018-05-25 | 2018-11-02 | 东莞市联洲知识产权运营管理有限公司 | A kind of angle bone plate |
| US20200038068A1 (en) * | 2018-08-03 | 2020-02-06 | Neurostructures, Inc. | Anterior cervical plate |
| CN109288614A (en) * | 2018-11-09 | 2019-02-01 | 中国人民解放军第二军医大学第二附属医院 | A kind of fixed emerging system in the preceding road of cervical vertebra natural height |
| CN211325494U (en) * | 2019-12-17 | 2020-08-25 | 杨小平 | Orthopedics backbone fixing device |
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