CN114469462B - Self-stabilizing atlantoaxial fusion cage - Google Patents
Self-stabilizing atlantoaxial fusion cage Download PDFInfo
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- CN114469462B CN114469462B CN202210362717.5A CN202210362717A CN114469462B CN 114469462 B CN114469462 B CN 114469462B CN 202210362717 A CN202210362717 A CN 202210362717A CN 114469462 B CN114469462 B CN 114469462B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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Abstract
The invention discloses a self-stabilizing atlantoaxial fusion cage, belongs to the technical field of fusion cages, and solves the problems that in the prior art, an anterior or posterior fixing system needs to be fixed by longer and thicker screws, the damage risk to adjacent spinal cords and vertebral arteries is higher, and the nailing position and the implantation direction of the atlantoaxial screws often require that muscle stops of an occipital muscle group are widely stripped in an operation, so that the postoperative continuous occipital neck pain and movement dysfunction are caused. The fusion cage comprises a body, a wing plate, a body screw and a vertebral body screw, wherein the body screw and the vertebral body screw are arranged on the wing plate, the wing plate is fixedly connected with the side face of the body through the body screw, and the wing plate is fixedly connected with the side face of the atlantoaxial lateral mass through the vertebral body screw. The fusion device can be used for fixing and fusing the atlantoaxial.
Description
Technical Field
The invention belongs to the technical field of fusion devices, and relates to a self-stabilizing atlantoaxial fusion device.
Background
The atlas includes the atlas (the first cervical vertebra) and the axis (the second cervical vertebra), which are the two uppermost vertebral levels at the junction of the spine and the skull. 50% of the left-right rotation range of the head is realized by the movement of the atlantoaxial joint, and 50% of the front-back flexion-extension range is realized by the movement of the atlantoaxillary joint. Clinically, the most common diseases of the atlantoaxial region include atlantoaxial joint dislocation caused by congenital dysplasia, rheumatoid immune diseases and the like and children torticollis caused by atlantoaxial rotation fixation; meanwhile, the atlantoaxial region is also the most common part of the aged cervical vertebra fracture and is a patient with obvious clinical symptoms, and the operation is the most effective and safe treatment mode at present; even for some patients with no obvious clinical symptoms, active follow-up and, if necessary, early intervention is required.
The atlantoaxial surgery is mainly divided into the simple anterior approach, the simple posterior approach and the anterior-posterior combined approach. For the treatment of the atlantoaxial dislocation, the infection risk of the anterior oral operation mode is higher, the respiratory and swallowing functions of the patient in the postoperative recovery period are greatly influenced, and the patient is more painful; therefore, in recent years, fixation of the atlantoaxial bone by a nail-rod or nail-plate system after posterior direct reduction (loosening of the atlantoaxial lateral mass joint space) is increasingly adopted clinically, so that the atlantoaxial bone is prevented from dislocating again and rotation between the atlantoaxial bones is limited, and meanwhile, the atlantoaxial lateral mass joint space needs to be filled with materials such as autologous bone or allogeneic bone to realize bone grafting fusion.
Currently, several companies have developed anterior or posterior fixation systems for atlantoaxial applications on the market, but, whether they are, they require fixation by longer (20-30 mm) and thicker (3.5-4.0 mm) screws, with a high risk of injury to the adjacent spinal cord and vertebral artery; meanwhile, the nailing position and the implantation direction of the atlantoaxial screw often require extensive stripping of the muscle insertion points of the occipital muscle groups during the operation, resulting in continuous occipital cervical pain and movement dysfunction after the operation.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a self-stabilizing atlantoaxial fusion cage, which solves the problems of the prior art that the anterior or posterior fixation system requires fixation by longer and thicker screws, which has a high risk of injury to the adjacent spinal cord and vertebral artery, and that the implantation position and implantation direction of the atlantoaxial screws often require extensive dissection of muscle insertion points of the sub-occipital muscle group during surgery, which results in continuous occipital cervical pain and movement dysfunction after surgery.
The purpose of the invention is mainly realized by the following technical scheme:
the invention provides a self-stabilizing atlantoaxial fusion cage, which comprises a body, a wing plate, a body screw and a vertebral body screw, wherein the body screw and the vertebral body screw are arranged on the wing plate, the wing plate is fixedly connected with the side surface of the body through the body screw, and the wing plate is fixedly connected with the side surface of the atlantoaxial side block through the vertebral body screw.
Further, the shape of the body matches the anatomical morphology of the lateral mass joint.
Further, the wing plate is of a bendable structure.
Further, the bending angle range of the wing plate is 0-30 degrees.
Furthermore, a limit structure is arranged between the body and the wing plate; the limiting structure comprises a body protrusion and a wing plate protrusion, the body protrusion is arranged on two sides of one end, close to the wing plate, of the body, the wing plate protrusion is arranged on two sides of the wing plate, the clamping grooves are formed in the side faces, opposite to the two body protrusions, and the wing plate protrusion is located in the clamping grooves.
Furthermore, the height of the protrusion of the wing plate relative to the edge of the wing plate is 0.5-1.5 mm.
Further, the body comprises an inner layer framework, an outer layer framework and a porous layer positioned between the inner layer framework and the outer layer framework, wherein bone grafting holes penetrating through the upper surface and the lower surface of the inner layer framework are formed in the inner layer framework.
Further, the body also comprises a connecting plate, and the inner layer frame and the outer layer frame are connected through the connecting plate; an outer layer through hole is formed in the outer layer frame, a connecting through hole is formed in the connecting plate, and an inner layer blind hole is formed in the inner layer frame; the outer layer through hole, the connecting through hole and the inner layer blind hole are corresponding in position and are sequentially communicated to form a body screw hole for mounting a body screw.
Further, the shape of the side of the body away from the wing plate is a bullet shape.
Furthermore, a first screw hole for installing a body screw and a second screw hole for installing a vertebral body screw are formed in the wing plate; the wing plate is divided into an upper part, a middle part and a lower part from top to bottom, the first screw hole is located in the middle of the wing plate, one part of the second screw hole is located in the upper part of the wing plate, and the rest of the second screw hole is located in the lower part of the wing plate.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
the self-stabilizing atlantoaxial fusion device provided by the invention has dual functions of atlantoaxial fixation and fusion, and is essentially different from the existing atlantoaxial nail rod or nail plate. On the one hand, in the operation, can realize the fastness of atlantoaxial and fusion ware through the tiny screw of pterygoid lamina, stable connection, the sclerotin can be implanted to the centrum screw, prevent the body, take place to become flexible between pterygoid lamina and the lateral mass, and then can prevent upper vertebral body and lower centrum dislocation once more, owing to can adopt more tiny screw (the diameter is less, length is shorter), security when putting the nail can effectively be improved, the muscle dead point of occipital muscle crowd has been kept, the pain of postoperative is lighter, it is littleer to influence patient's quality of life, it needs to fix through longer and thicker screw to solve way or way of escape fixing system, the higher problem of damage risk to adjacent spinal cord and vertebral artery.
The self-stabilizing atlantoaxial fusion cage provided by the invention can be implanted into a natural gap (lateral mass joint) of a human body from the gap between the hamstring and the semispinous muscle of the head, has smaller damage to the posterior muscle, and can belong to the technical field of minimally invasive surgery; meanwhile, the step of implanting the screw of the posterior screw rod system in the prior art can be omitted, and the operation flow of the operation is simplified.
According to the self-stabilizing atlantoaxial fusion cage provided by the invention, horizontal movement and vertical movement of the wing plate protrusion are limited through the clamping groove, so that on one hand, the initial installation of the wing plate can be positioned, and on the other hand, the wing plate and the body can be prevented from displacement and movement.
According to the self-stabilizing atlantoaxial fusion cage provided by the invention, on one hand, the arrangement of the connecting plate can connect the inner layer frame and the outer layer frame, and the structural strength of the connecting plate is obviously higher than that of the porous layer, so that the overall structural strength of the body can be effectively improved; on the other hand, the body screw hole is arranged on the outer layer frame, the connecting plate and the inner layer frame, and the length of the body screw hole can be properly prolonged, so that the connection stability of the wing plate and the body can be further improved.
When the length of the needed wing plate is short, the first sawteeth can be connected with the first-step second sawteeth, the first sawteeth are completely attached to the second sawteeth, and at the moment, the second-step second sawteeth can limit the first-step second sawteeth in the thickness direction, so that the shaking of the first-step second sawteeth in the installation process is reduced; when the length of required pterygoid lamina is longer, can select first sawtooth to be connected with second order second sawtooth, at this moment, although there is the gap between first sawtooth and the second sawtooth, because the vertical limit of first sawtooth is laminated with the vertical limit of second sawtooth all the time, spacing between the vertical limit of a plurality of first sawtooth and a plurality of sawtooth through, still can realize the stable connection between first plate body and the second plate body.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings;
fig. 1 is a schematic structural view of a self-stabilizing atlantoaxial fusion cage according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a plate in a bent state of a self-stabilizing atlantoaxial fusion cage according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of the self-stabilized atlantoaxial fusion cage according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a wing plate in the self-stabilizing atlantoaxial fusion cage according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a vertebral body screw in the self-stabilizing atlantoaxial fusion cage according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a body screw of the self-stabilizing atlantoaxial fusion cage according to an embodiment of the present invention;
FIG. 7a is a schematic view of a first connection between a first plate and a second plate of a self-stabilizing atlantoaxial fusion cage according to an embodiment of the present invention;
FIG. 7b is a schematic view of a second connection between the first plate and the second plate of the self-stabilizing atlantoaxial fusion device according to an embodiment of the present invention;
fig. 7c is a schematic view illustrating a third connection between the first plate and the second plate of the self-stabilizing atlantoaxial fusion cage according to the embodiment of the present invention;
fig. 8a is a schematic view illustrating the connection between the first plate and the first-step second plate of the self-stabilizing atlantoaxial fusion device according to an embodiment of the present invention;
fig. 8b is a schematic view illustrating the connection between the first plate and the second plate of the self-stabilizing atlantoaxial fusion device according to an embodiment of the present invention;
fig. 8c is a side view of the second plate body of the self-stabilizing atlantoaxial fusion device according to one embodiment of the present invention.
Reference numerals are as follows:
1-body; 101-inner layer frame; 102-an outer frame; 103-a porous layer; 104-a connecting plate; 105-bone grafting holes; 2-wing plate; 201-a first plate body; 202-a second plate body; 3-body screw; 301-body nut; 302-body screw; 303-nut holes; 4-vertebral body screws; 401-cone nut; 402-a cone screw; 5-superior vertebral body; 6-inferior vertebral body; 7-the body is convex; 8-wing plate protrusion; 9-card slot.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.
Example one
The embodiment provides a self-stabilizing atlantoaxial fusion cage, which is shown in fig. 1 to 6 and comprises a body 1, a wing plate 2, a body screw 3 and a vertebral body screw 4, wherein the body screw 3 and the vertebral body screw 4 are arranged on the wing plate 2, the wing plate 2 is fixedly connected with the side surface of the body 1 through the body screw 3, and the wing plate 2 is fixedly connected with the side surface of the atlantoaxial side block through the vertebral body screw 4.
It should be noted that the superior vertebral body in the atlantoaxial lateral mass is defined as the superior vertebral body 5, the inferior vertebral body is defined as the inferior vertebral body 6, and the lateral mass joint is the position between the superior vertebral body 5 and the inferior vertebral body 6.
In practice, the fusion device can be implanted in the lateral mass joint from the gap between the hamstring and the hemicranium, so that the body 1 is located at the joint between two adjacent lateral masses.
Compared with the prior art, the self-stabilizing atlantoaxial fusion device provided by the embodiment has dual functions of atlantoaxial fixation and fusion, and is essentially different from the existing atlantoaxial nail rod or nail plate. On the one hand, in the operation, can realize the fastness of atlantoaxial and fusion ware through the tiny screw of pterygoid lamina 2, stable connection, vertebra screw 4 can implant the sclerotin, prevent body 1, take place not hard up between pterygoid lamina 2 and the lateral mass, and then can prevent that upper vertebral body 5 and lower vertebral body 6 from dislocating once more, owing to can adopt more tiny screw (the diameter is less, length is shorter), can effectively improve the security when putting the nail, the muscle stop of muscle crowd under the occipitalis has been kept, postoperative pain is lighter, it is less to the quality of life influence of patient, it needs to fix through longer and thicker screw to solve way of way or way of escape fixed system, the higher problem of damage risk to the spinal cord and vertebral artery that adjoin.
On the other hand, the fusion device can be implanted into a natural gap (lateral mass joint) of a human body from a gap between the hamstring and the hemispinalis, has smaller damage to the rear muscle, and can belong to the technical field of minimally invasive surgery; meanwhile, the step of implanting the screw of the posterior screw rod system in the prior art can be omitted, and the operation flow of the operation is simplified.
In order to be able to improve the fusion effect between the above-described fusion cage and the atlantoaxial joint, the shape of the body 1 is exemplarily matched to the anatomical morphology of the lateral mass joint, i.e. the side of the body 1 facing the superior vertebral body 5 (i.e. the superior end surface) is conformal to the superior vertebral body 5 and the side of the body 1 facing the inferior vertebral body 6 (i.e. the inferior end surface) is conformal to the inferior vertebral body 6. Thus, the upper end surface of the body 1 can be better attached to the upper vertebral body 5, and the lower end surface of the body 1 can be better attached to the lower vertebral body 6, so that the fusion effect between the fusion cage and the atlantoaxial joint can be improved.
In order to adapt to different vertebral body apposition relations, the wing plate 2 is a bendable structure, for example, the wing plate 2 is an elastic wing plate 2, the fusion device and the vertebral body are connected through the bendable wing plate 2, and the wing plate 2 can realize bending and adjustment of angles in an operation, so that different vertebral body apposition relations can be adapted. Illustratively, the bending angle of the blade 2 is in a range of 0 to 30 °, and the bending angle refers to an angle at which the blade 2 can be tilted in a vertical state.
It should be noted that, for example, the angle adjustment manner of the bendable wing plate 2 is not limited to one, and includes but is not limited to a manual implementation manner (manually adjusting the angle, etc.), a material implementation manner (elastic material, memory metal, etc.), and a mechanical implementation manner (rack and pinion, hinge, etc.).
In order to prevent to take place displacement and activity between pterygoid lamina 2 and the body 1, be equipped with limit structure between body 1 and the pterygoid lamina 2, particularly, limit structure includes that body arch 7 and pterygoid lamina are protruding 8, body 1 both sides that are close to pterygoid lamina 2 one end are located to body arch 7, pterygoid lamina 2's both sides are located to the protruding 7 relative sides of two bodies, draw-in groove 9 is seted up to pterygoid lamina arch 8, pterygoid lamina arch 8 is located draw-in groove 9, inject the horizontal motion and the vertical motion of the protruding 8 of pterygoid lamina through draw-in groove 9, can fix a position the initial installation of pterygoid lamina 2 on the one hand, on the other hand can prevent to take place displacement and activity between pterygoid lamina 2 and the body 1.
Illustratively, the protrusion height of the wing plate protrusion 8 relative to the edge of the wing plate 2 is 0.5-1.5 mm.
As for the structure of the body 1, specifically, it is a porous structure, including an inner frame 101, an outer frame 102, a porous layer 103 between the inner frame 101 and the outer frame 102, bone grafting holes 105 penetrating the upper surface and the lower surface of the inner frame 101 are provided in the inner frame 101 for bone grafting in operation.
Considering that body 1 and pterygoid lamina 2 need realize fixed connection through body screw 3, in order to guarantee the structural strength of body screw 3 junction, above-mentioned body 1 still includes connecting plate 104, inlayer frame 101 and outer frame 102 pass through connecting plate 104 to be connected, set up outer through-hole on the outer frame 102, set up connect the through-hole on the connecting plate 104, set up the inlayer blind hole on the inlayer frame 101, outer through-hole, connect the through-hole and the corresponding position of inlayer blind hole, communicate in proper order and constitute body 1 screw that is used for installing body screw 3. Therefore, on one hand, the inner frame 101 and the outer frame 102 can be connected by the connecting plate 104, and the structural strength of the connecting plate 104 is obviously higher than that of the porous layer 103, so that the overall structural strength of the body 1 can be effectively improved; on the other hand, the screw holes of the body 1 are formed in the outer frame 102, the connecting plate 104 and the inner frame 101, and the length of the screw holes of the body 1 can be appropriately increased, thereby further improving the connection stability between the blade 2 and the body 1.
Illustratively, the thread form of the screw hole of the body 1 is a coarse thread (e.g., a standard coarse thread), which is threadably connected with the body screw 3.
In order to facilitate the body 1 to be inserted into the side block joint, one side of the body 1, which is far away from the wing plate 2, is in a bullet head shape, and the bullet head shape is adopted, so that the insertion resistance of the body 1 when the body 1 is inserted into the side block joint can be effectively reduced, and the body 1 can be conveniently inserted into the side block joint.
It can be understood that the wing plate 2 is provided with a first screw hole for installing the body screw 3 and a second screw hole for installing the vertebral body screw 4, wherein the wing plate 2 is divided into an upper portion, a middle portion and a lower portion from top to bottom, the first screw hole is located in the middle of the wing plate 2, a part of the second screw hole is located in the upper portion of the wing plate 2, and the rest of the second screw hole is located in the lower portion of the wing plate 2.
It should be noted that, since the superior vertebral body 5 is a local structure of the atlantoaxial, the space available for nailing at this position is small, and therefore, the number of the second screw holes located at the upper portion of the wing plate 2 is only 1. Accordingly, since the lower vertebral body 6 is a local structure of the atlantoaxial, the nailing space at this position is more than that of the upper vertebral body 5, and thus, the number of the second screw holes located at the lower portion of the wing plate 2 is 2-3.
As for the structure of the body screw 3, specifically, the body screw comprises a body nut 301 and a body screw 302 connected with the body nut 301, the surface of the body screw 302 is a thread, a nut hole 303 is formed in the body nut 301 for realizing the threaded connection between the body screw 302 and the body 1, and the body nut 301 can be connected with a special holder.
It should be noted that, in practical applications, the nut hole 303 and the body screw hole have the same specification and size, so that the same holder can be used for the connection operation.
As for the structure of the cone screw 4, specifically, it includes a cone nut 401 and a cone screw 402 connected to the cone nut 401, the surface of the cone screw 402 is a thread for realizing the threaded connection between the cone screw 402 and the cone, and the cone nut 401 can be connected to a special holder.
The structure of the wing plate 2 includes a first plate 201 and a second plate 202, wherein a side of the first plate 201 close to the second plate 202 is a triangular first saw tooth, and similarly, a side of the second plate 202 close to the first plate 201 is a triangular second saw tooth.
In order to improve the joint between the first plate 201 and the second plate 202, one of the edges of the first saw teeth is a vertical edge, the other edge of the first saw teeth is an inclined edge, one of the edges of the second saw teeth is a vertical edge, the other edge of the second saw teeth is an inclined edge, and the vertical edge of the first saw teeth and the vertical edge of the second saw teeth are mutually jointed.
In practical applications, in order to improve the applicability of the self-stabilizing atlantoaxial fusion device, the number and the structure of the first plate 201 and the second plate 202 may be as follows, considering that the atlantoaxial dimensions of different patients are different, so that the required length of the wing plate 2 is also different.
In one of the manners, the number of the first plate 201 is 1, the number of the second plate 202 is multiple, and the heights and angles of the multiple second saw teeth are different, see fig. 7a to 7c, exemplarily, the number of the second plate 202 is 3, and the heights of the 3 second saw teeth are sequentially increased, it should be noted that, along with the increase of the heights of the second saw teeth, the first saw teeth and the second saw teeth may be changed from being completely attached to having a gap therebetween, but because the vertical sides of the first saw teeth and the vertical sides of the second saw teeth are always attached to each other, the stable connection between the first plate 201 and the second plate 202 can still be achieved through the limitation between the vertical sides of the multiple first saw teeth and the vertical sides of the multiple saw teeth.
Alternatively, the number of the first plate body 201 and the second plate body 202 is one, and any cross-sectional shape of the second saw tooth is stepped, as shown in fig. 8a to 8c, and exemplarily, any cross-sectional shape of the second saw tooth is two-step stepped. When the length of the required wing plate 2 is short, the first sawteeth can be connected with the first-step second sawteeth, the first sawteeth are completely attached to the second sawteeth, and at the moment, the second-step second sawteeth can limit the first-step second sawteeth in the thickness direction, so that the shaking of the first-step second sawteeth in the installation process is reduced; when the length of required pterygoid lamina 2 is longer, can select first sawtooth to be connected with second order second sawtooth, this moment, though have the gap between first sawtooth and the second sawtooth, because the vertical limit of first sawtooth is laminated with the vertical limit of second sawtooth all the time, spacing between the vertical limit of a plurality of first sawtooth and a plurality of sawtooth through, still can realize the stable connection between first plate body 201 and the second plate body 202.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A self-stabilizing atlantoaxial fusion cage is characterized by comprising a body, a wing plate, a body screw and a vertebral body screw, wherein the body screw and the vertebral body screw are arranged on the wing plate;
the wing plate comprises a first plate body and a second plate body, wherein triangular first saw teeth are arranged on one side of the first plate body close to the second plate body, and triangular second saw teeth are arranged on one side of the second plate body close to the first plate body;
one side of the first sawteeth is a vertical side, the other side of the first sawteeth is an inclined side, one side of the second sawteeth is a vertical side, the other side of the second sawteeth is an inclined side, and the vertical side of the first sawteeth and the vertical side of the second sawteeth are mutually attached;
the number of the first plate bodies is 1, the number of the second plate bodies is multiple, and the heights and the angles of the second sawteeth are different; or, the number of the first plate body and the second plate body is one, and any cross section of the second saw teeth is in a step shape.
2. The self-stabilizing atlantoaxial fusion device of claim 1, wherein the body has a shape that matches the anatomical morphology of the lateral mass joint.
3. The self-stabilizing atlantoaxial fusion device of claim 1, wherein the wing plate is of a bendable structure.
4. The self-stabilizing atlantoaxial fusion cage of claim 3, wherein the curvature angle of the flap plate ranges from 0 to 30 °.
5. The self-stabilizing atlantoaxial fusion cage according to any one of claims 1 to 4, wherein a limit structure is provided between the body and the wing plate;
the limiting structure comprises a body protrusion and wing plate protrusions, the body protrusion is arranged on two sides of one end, close to the wing plates, of the body, the wing plate protrusions are arranged on two sides of the wing plates, clamping grooves are formed in the side faces, opposite to the two body protrusions, and the wing plate protrusions are located in the clamping grooves.
6. The self-stabilizing atlantoaxial fusion cage of claim 5, wherein the raised height of the wing plate protrusion relative to the wing plate edge is 0.5-1.5 mm.
7. The self-stabilizing atlantoaxial fusion cage according to any one of claims 1 to 4, wherein the body comprises an inner layer frame, an outer layer frame, and a porous layer positioned between the inner layer frame and the outer layer frame, wherein bone grafting holes penetrating through the upper surface and the lower surface of the inner layer frame are formed in the inner layer frame.
8. The self-stabilizing atlantoaxial fusion cage of claim 7, wherein the body further comprises a connecting plate through which the inner and outer frames are connected;
the outer layer frame is provided with an outer layer through hole, the connecting plate is provided with a connecting through hole, and the inner layer frame is provided with an inner layer blind hole;
the outer layer through hole, the connecting through hole and the inner layer blind hole are corresponding in position and are sequentially communicated to form a body screw hole for mounting a body screw.
9. The self-stabilizing atlantoaxial fusion device of any one of claims 1 to 4, wherein a side of the body distal to the wing plate is bullet shaped.
10. The self-stabilizing atlantoaxial fusion cage according to any one of claims 1 to 4, wherein the wing plate is provided with a first screw hole for mounting a body screw and a second screw hole for mounting a vertebral body screw;
divide into upper portion, middle part and lower part with the pterygoid lamina from last to down, first screw is located the middle part of pterygoid lamina, and partly second screw is located the upper portion of pterygoid lamina, and remaining second screw is located the lower part of pterygoid lamina.
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| CN202210362717.5A CN114469462B (en) | 2022-04-08 | 2022-04-08 | Self-stabilizing atlantoaxial fusion cage |
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| CN202210362717.5A CN114469462B (en) | 2022-04-08 | 2022-04-08 | Self-stabilizing atlantoaxial fusion cage |
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| CN114469462B true CN114469462B (en) | 2022-07-05 |
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| CN104287818A (en) * | 2014-10-29 | 2015-01-21 | 刘忠军 | Length-adjustable vertebral plate |
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| US9248027B2 (en) * | 2011-07-12 | 2016-02-02 | Spinesmith Partners, L.P. | Cervical implant with exterior face plate |
| CN104546095B (en) * | 2015-01-27 | 2017-05-24 | 赵建华 | Adaptive floating combined cervical interbody fusion cage |
| KR101807554B1 (en) * | 2016-01-18 | 2017-12-11 | 주식회사 메타바이오메드 | Cage assembly for cervical spine |
| CN107411855A (en) * | 2017-08-30 | 2017-12-01 | 西安市红会医院 | Atlas and axis fusion of intervertebral joints device |
| CN108143523B (en) * | 2017-12-22 | 2024-01-23 | 北京大学第三医院 | Atlantoaxial lateral mass joint fixing fusion device |
| CN110025410A (en) * | 2019-05-10 | 2019-07-19 | 云南欧铂斯医疗科技有限公司 | Fixed device is merged in embedded anterior cervical vertebrae pressurization |
| WO2021112892A1 (en) * | 2019-12-06 | 2021-06-10 | Life Spine, Inc. | Spinal facet joint and laminoplasty implant |
| CN213190012U (en) * | 2020-05-22 | 2021-05-14 | 天津正天医疗器械有限公司 | Anterior cervical miniature fixing plate and fixing system |
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2022
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| WO2012056119A1 (en) * | 2010-10-29 | 2012-05-03 | Kasios | Cervical cage and plate system |
| CN104287818A (en) * | 2014-10-29 | 2015-01-21 | 刘忠军 | Length-adjustable vertebral plate |
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