WO2021258546A1

WO2021258546A1 - Assembled cervical vertebra and uncovertebral joint fusion cage

Info

Publication number: WO2021258546A1
Application number: PCT/CN2020/113285
Authority: WO
Inventors: 刘浩; 杨毅; 洪瑛; 丁琛; 王贝宇; 孟阳
Original assignee: 四川大学华西医院
Priority date: 2020-06-24
Filing date: 2020-09-03
Publication date: 2021-12-30
Also published as: CN111700716A; CN111700716B

Abstract

An assembled cervical vertebra and uncovertebral joint fusion cage, belonging to the field of medical instruments and comprising an intervertebral support body (100) and uncovertebral joint fusion components (200), wherein each uncovertebral joint fusion component (200) comprises a circle of cofferdam (210); a bone grafting cavity (220) penetrating up and down is provided inside the cofferdam (210), and the uncovertebral joint fusion components (200) are respectively provided on the left side and the right side of the intervertebral support body (100); the assembled cervical vertebra and uncovertebral joint fusion cage further comprises connecting members (300); the intervertebral support body (100) and the uncovertebral joint fusion components (200) are arranged in a split manner; and the intervertebral support body (100) and the uncovertebral joint fusion components (200) can be assembled and installed by means of the connecting members (300). Through the arrangement of the split structure, the implantation and installation can be carried out in sequence during implantation and installation, thus avoiding the problem that implantation is difficult due to the fact that implantation needs to be carried out at the same time when an integrated structure is arranged; and through the arrangement of the deformable cofferdam (210), the implantation and installation operation can be facilitated, the fitting effect can be improved, and meanwhile, the early osteogenesis fusion is facilitated.

Description

Assembled type cervical vertebra and uncinate joint fusion cage

Technical field

The invention relates to the field of medical equipment, in particular to an assembled cervical uncinate joint fusion cage.

Background technique

Anterior cervical decompression and fusion (ACDF) has always been an effective classic surgical method for the treatment of cervical degenerative diseases. The anterior cervical steel plate, cervical interbody fusion cage and other internal plant materials improve the initial stability, support strength, and bone graft fusion rate of ACDF surgery. Among them, the basic purpose of the design of the cervical fusion cage is to maintain and improve the curvature of the cervical spine on the basis of providing good initial stability and support strength, and to provide a good biological and biomechanical environment for the intervertebral fusion to promote bone grafting. Fusion.

There are many types of cervical fusion cages currently on the market, but the basic design is still a cylindrical structure with a bone graft cavity in the center or a box-shaped structure with an opening around the bone graft cavity in the center. Cervical fusion cages are generally placed in the center of the intervertebral space. The bone graft materials are all in the center of the fusion cage, that is, the central area of the intervertebral space. Along with related studies, it has been found that, compared with pure intervertebral endplate bone grafting, unclip joint bone grafting can increase the fusion rate of bone grafts in patients at 3 and 6 months after surgery. For the relevant research results, see the literature Application and effect observation of bone in Zero-P fixation and fusion" Liu Hao, Duan Yuchen, Rong Xin, etc., Chinese Journal of Bone and Joint, 2019, 8(10): 742-747, hereinafter referred to as Literature 1.

At the same time, the relevant authors of the above-mentioned document 1 applied for and disclosed the relevant fusion cage structure for the uncoated vertebra joint bone graft, see Chinese Patent Application No. CN201510541160.1, entitled "Cervical Uncrusted Vertebral Joint Fusion Cage", hereinafter referred to as document 2. Literature two, by setting the corresponding “uncrust vertebra joint fusion component” at the corresponding part of the cervical spine vertebra joint fusion and forming a bone graft cavity to achieve bone graft fusion to the cervical spine joint part, thereby shortening the postoperative healing time and improving The purpose of bone graft fusion rate.

However, in the specific "cervical uncinate joint fusion cage" structure disclosed in the above-mentioned document 2, due to certain defects in the structural design, the following problems still exist in the actual use process:

First, the elastic support body between the vertebral bodies and the fusion components of the uncylinder vertebrae joints on both sides adopt an integrated structure design, which leads to the irregularity of the unconverted vertebra joint space during the implantation process, resulting in the elastic support body between the vertebral bodies and both sides. It is difficult to implant and install the fusion components of the uncrusted vertebral joint at the same time, so the installation and implantation operation is more difficult;

Second, due to the irregular joint space of the uncylinder vertebrae, and the original fusion component of the uncylinder vertebrae joint is a single height immutable structure. The bone surface of the body is completely adhered, which affects the postoperative recovery effect;

Third, the elastic support between the vertebral bodies and the fusion components of the uncrusted vertebral joints on both sides adopt an integrated structure design, but the actual situation is due to the inconsistency of the stress distribution between the elastic support of the vertebral bodies and the uncrusted spine joint fusion components on the side. There is often stress concentration when the patient’s neck moves. Therefore, if the elastic support between the vertebral bodies and the fusion components of the uncrusted vertebral joints on both sides cannot effectively move relative to each other, the stress will not be distributed more dispersedly on the various areas of the fusion cage, which will affect The patient's bone graft healed and recovered.

Fourth, the elastic support body between the vertebral bodies is directly connected to the upper and lower vertebral bodies by screw fixation, lacking the necessary amount of movement, and there is stress concentration which may cause the risk of complications such as screw withdrawal, fracture, and bone resorption around the screw; at the same time, due to lack of necessary The amount of activity leads to the lack of stress stimulation caused by micro-movement at the uncinate joints, which is not conducive to the patient's bone graft fusion and postoperative rehabilitation.

Summary of the invention

The technical problem solved by the present invention is to provide an assembled cervical uncinate joint fusion cage that is more convenient for implantation and installation.

The technical solution adopted by the present invention to solve its technical problems is: an assembling type cervical vertebra vertebrae joint fusion cage, including an intervertebral body support and an uncrust vertebra joint fusion component, the uncoated vertebra joint fusion component includes a circle of cofferdam, in the cofferdam The inside of the vertebral body is a bone graft cavity that penetrates up and down, and an uncylinder joint fusion component is provided on the left and right sides of the intervertebral support body; it also includes a connector, and the intervertebral body support body and the uncylinder vertebra joint fusion component are set separately , The intervertebral support body and the fusion part of the unclip joint can be assembled and installed through the connecting piece.

Further, the intervertebral support body and the uncylinder joint fusion component are installed in a sliding assembly, specifically: chutes are respectively provided on the left and right sides of the intervertebral support body, and the chutes extend from the front of the intervertebral support body. The side surface extends to the posterior surface of the support between the vertebral bodies and forms an end limit stop near the posterior surface; one side of the connecting piece is connected with the fusion part of the uncinate vertebral joint, and the other side of the connecting piece is provided with a sliding body; The sliding body and the sliding groove can be slidably matched.

Further, a non-return mechanism is provided at one end of the inside of the chute close to the front side; the above-mentioned non-return mechanism is preferably provided with a non-return elastic piece.

Further, after the uncylinder vertebral joint fusion component is assembled and installed with the intervertebral body supporting body, the uncylinder vertebral joint fusion component has the function of being able to move relative to the intervertebral body supporting body.

Further, the function of the unclip joint fusion component capable of moving relative to the intervertebral support body specifically includes at least one of swing, twist, and translation.

Further, the range of the translational displacement corresponding to the translation function is 0-2mm; the range of the swing angle corresponding to the swing function is 0-5°; the range of the twisting angle corresponding to the twist function is 0-5°.

Furthermore, the function of the unclip joint fusion component that can move relative to the intervertebral support body is realized by one of the following specific structures:

In the first type, the sliding groove is a T-shaped sliding groove, the sliding body is a T-shaped sliding block, and the T-shaped sliding block and the T-shaped sliding groove are movable coordination with a gap;

In the second type, the sliding groove is a dovetail sliding groove, the sliding body is a dovetail sliding block, and the dovetail sliding groove and the dovetail sliding block have a clearance movable fit;

In the third type, the sliding groove is an arc sliding groove, the sliding body is a cylinder, and the cylinder is hingedly matched with the arc sliding groove.

Furthermore, the function of the unclip joint fusion component that can move relative to the intervertebral body support is realized by providing a deformable connector.

Furthermore, at least two connecting pieces are provided corresponding to each unclip vertebra joint fusion component, and each connecting piece is connected to the corresponding unclip vertebra joint fusion component at intervals along the direction of the chute; and is fused with the same uncvertebral joint fusion component. Each connecting piece connected by the component is connected with the same sliding body or each connecting piece connected with the same uncylinder joint fusion component is respectively provided with a sliding body.

Furthermore, the connecting piece is a deformable linear structure.

Further, the connecting piece is a medical-grade metal wire or a medical-grade metal spring cord.

Furthermore, the cofferdam of the uncinate vertebral joint fusion component is a structure capable of telescoping and deforming at least in the direction in which the bone graft cavity penetrates up and down.

Furthermore, the cofferdam of the unclip joint fusion component is made of an elastic medical-grade polymer material.

Furthermore, the cofferdam of the fusion component of the uncylinder vertebral joint is made of elastic medical grade rubber material or silicone material.

Furthermore, the cofferdam of the fusion component of the uncylinder vertebral joint includes an upper ring cushion layer, a lower ring cushion layer and an elastic member, and the elastic member is connected between the upper ring cushion layer and the lower ring cushion layer.

Further, there are a plurality of elastic members, and the plurality of elastic members are arranged in sequence along the direction of the cofferdam.

Furthermore, the elastic member is a spring or a bent flexible metal wire or a bent flexible metal sheet.

Furthermore, adjacent elastic members are interwoven to form a cofferdam with a net-like structure.

Further, it also includes a screw. The top screw hole and the bottom screw hole are arranged in the intervertebral body support; the top screw hole penetrates from the anterior side of the intervertebral body support and exits obliquely from the top side; and the bottom screw hole extends from the The anterior side of the intervertebral support body penetrates and obliquely penetrates from the bottom side; a screw is set corresponding to the top screw hole and the bottom screw hole; a section of the hole protruding inward is set in both the top screw hole and the bottom screw hole The necking section is provided with an internal thread section in the necking section, an external thread section capable of threading with the above internal thread section is provided on the screw, and a polished rod section is provided between the head of the screw and the external thread section ; When the screw and the intervertebral body support body are assembled and connected, the polished rod section of the screw and the necked section of the corresponding screw hole are in a movable fit with clearance.

Further, it also includes a guard plate. The guard plate is arranged on the front side of the intervertebral body support body and is installed on the intervertebral body support body by fastening screws. The fusion component extends and surrounds a part of the outer circumference of the fusion component of the uncinate vertebral joint.

Further, the left and right sides of the guard plate are respectively provided with hooks that are bent inward, and the outer peripheral side wall of the uncylinder vertebra joint fusion component is provided with an elastic piece structure corresponding to the hooks.

Further, spurs are respectively provided on the top side and the bottom side of the intervertebral support body.

Furthermore, a through hole is provided in the thickness direction of the cofferdam.

The beneficial effect of the present invention is that by setting a split structure, the present invention makes the intervertebral support body and the uncylinder joint fusion component a split structure before implantation. Therefore, the implantation and installation can be carried out one after the other during the implantation and installation, which avoids When it is installed as a one-piece structure, it needs to be implanted at the same time, which causes the problem of difficulty in implantation. In addition, through the specific use of sliding body and chute for assembly and installation, the implant assembly operation is more convenient and simple, and the damage to the vertebral artery and the bone graft from falling into the nerve root canal and vertebrae are reduced during the operation. The risk in the tube also reduces the difficulty of the operation technique for the surgeon, and facilitates the popularization and application of the technique of bone grafting of the hook vertebral joint in the majority of primary hospitals.

The present invention is provided with the function of the uncrusted vertebral joint fusion component that can move relative to the support between the vertebral bodies; on the one hand, during the implantation and installation process, the movable function can play a certain position adjustment effect, and reduce the precaution during the installation process. Stress load conditions, and because it can be adjusted to a certain position, it is also easier to install; on the other hand, after implantation and installation, the fusion component of the hook vertebral joint is allowed to have a certain amount of micro-motion relative to the intervertebral support body. Reduce the stress concentration that exists during the postoperative neck fretting movement of the patient, so that the stress generated by the neck movement can be distributed in each area of the fusion cage, and reduce the risk of screw fracture and bone resorption caused by stress concentration. ; At the same time, because it has a certain amount of micro-momentum, it can produce a certain stress stimulation effect during the neck movement, which is more conducive to the patient's bone graft fusion and postoperative rehabilitation.

The present invention adopts a cofferdam structure capable of telescopic deformation. On the one hand, it can make the fusion component of the uncylinder vertebrae joints more convenient to be implanted and installed in the unconverted joint gap of irregular shape through the shrinkage and deformation. The elastic recovery ability realizes the complete conformity with the bone surface of the upper and lower vertebrae in the joint space of the uncinate vertebra, thereby improving the wrapping effect of the bone graft particles in the bone graft cavity and preventing shedding; in addition, it can also be used when the patient's cervical spine moves slightly after surgery. Because the cofferdam around the bone graft cavity can be compressed and deformed, it can make the internal bone graft bear more stress stimulation and reduce the shielding effect of the cofferdam on the stress, and then through the corresponding stress stimulation on the bone graft, it can be more beneficial Early bone fusion.

In the present invention, the intervertebral body support body is connected and installed by using screws with a specific matching structure. After installation, the intervertebral body support body and the screw are interstitially movable, so that the intervertebral body support body can also be implanted after installation. Leaving a certain amount of activity can effectively reduce the risk of screw loosening, fracture, and bone resorption around the implant; at the same time, this design can also prevent the screw from returning to a certain extent; in addition, because of the certain amount of activity, It can produce a certain stress stimulation effect during the neck movement, which is more conducive to the patient's bone graft fusion and postoperative recovery. By providing the guard plate, the present invention can further play the role of wrapping and limiting the fusion components of the uncrusted vertebral joints on both sides, and can also prevent the bone graft particles from falling forward; at the same time, it can also play a role in the installation of the support body between the vertebral bodies. The limit of the screw prevents it from exiting.

Description of the drawings

Figure 1 is an exploded schematic diagram of the assembled cervical uncinate joint fusion cage according to the present invention;

Figure 2 is a three-dimensional schematic diagram of the assembled cervical uncinate joint fusion cage according to the present invention;

Figure 3 is a top view of Figure 2;

Figure 4 is a cross-sectional view of the A-A section in Figure 3;

Figure 5 is a cross-sectional view of the B-B section in Figure 3;

Figure 6 is a cross-sectional view of the C-C section in Figure 3;

FIG. 7 is a schematic diagram when another elastic member is used in FIG. 6;

Figure 8 is a partial schematic diagram of a cofferdam with a mesh structure after unfolding;

Fig. 9 is a cross-sectional view of the D-D section in Fig. 4, and is provided with a structure in which a hook and an elastic sheet structure are snap-fitted;

FIG. 10 is an enlarged schematic diagram of the partial area A in FIG. 4, and is a schematic diagram of the cooperation of the T-shaped chute and the T-shaped sliding block;

Fig. 11 is a schematic diagram showing the use of hinged fitting instead of Fig. 10;

Fig. 12 is an enlarged schematic diagram of a partial area B in Fig. 5;

Figures 13 to 16 are three-dimensional schematic diagrams of the uncylinder joint fusion components corresponding to four different slider structures;

Figure 17 is a schematic diagram of the movable function of the fusion component of the uncinate vertebral joint;

Fig. 18 is a schematic diagram of the P direction in Fig. 17;

The marks in the figure are: intervertebral body support 100, anterior side 110, posterior side 120, top screw hole 130, bottom screw hole 140, top side 150, bottom side 160, constriction 170, spur 180, chute 190, Non-return mechanism 191, end limit stopper 192, uncinate vertebra joint fusion component 200, cofferdam 210, upper ring cushion 211, lower ring cushion 212, elastic member 213, bone graft cavity 220, shrapnel structure 230, connection The piece 300, the sliding body 310, the screw 400, the external thread section 410, the polished rod section 420, the screw head 430, the guard plate 500, the hook 510, the fastening screw 600, the swing shaft 700, and the torsion shaft 800.

detailed description

The present invention will be further described below in conjunction with the drawings and specific embodiments.

It should be noted that if there are directional indications used in the present invention, such as up, down, left, right, front and back directions, and orientation terms, it is to facilitate the description of the relative positional relationship between components, not related components or inter-components. The absolute position of the positional relationship is specifically used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. .

As shown in Figures 1 to 18, the assembled cervical spine joint fusion cage of the present invention includes an intervertebral support body 100 and an unclip joint fusion component 200. The unclip joint fusion component 200 includes a circle The weir 210 is the bone graft cavity 220 that penetrates up and down inside the cofferdam 210, and on the left and right sides of the intervertebral body support 100 are respectively provided with a hook vertebral joint fusion component 200; it also includes a connector 300, which supports the intervertebral body. The body 100 and the unclip joint fusion component 200 are arranged separately, and the inter-vertebral body support body 100 and the uncrust vertebra joint fusion component 200 can be assembled and installed through the connecting piece 300.

Among them, the intervertebral body support body 100 is used to be implanted in the middle of the intervertebral disc of the cervical spine, mainly supporting the upper and lower vertebral bodies; and the uncylinder joint fusion component 200 is the uncylinder vertebra joints implanted on both sides of the cervical spine By filling the corresponding bone graft cavity 220 with bone graft particles to achieve the bone graft fusion of the uncylinder vertebra joint part, thereby achieving the purpose of improving the postoperative bone graft fusion rate of the patient. In the present invention, the intervertebral body support body 100 and the uncinate joint fusion component 200 are arranged separately, that is, the two are arranged separately before implantation and installation, so that the implantation can be carried out sequentially during the implantation process, such as The intervertebral body support body 100 is first implanted, and then the two uncylinder vertebral joint fusion components 200 are respectively implanted into the uncrusted vertebral joints on both sides of the intervertebral body support body 100, and the uncylinder joint fusion components on both sides are fused together. 200 is connected to the intervertebral support body 100 for assembly and installation. Due to the split setting, compared with the integrated structure in Document 2, it can make the implant assembly operation more convenient and simple, and reduce the damage to the vertebral artery and the bone graft from the nerve root canal and spinal canal during the operation. The internal risk reduces the technical difficulty of the surgeon, and facilitates the popularization and application of the technique of bone grafting of the hook vertebral joint in the majority of primary hospitals.

More specifically, the assembling and mounting structure between the intervertebral body support 100 and the hook vertebral joint fusion component 200 in the above-mentioned present invention can be specifically configured as a sliding assembling installation, as shown in the relevant drawings. It is: the left and right sides of the intervertebral body support 100 are respectively provided with chutes 190, which extend from the anterior side 110 of the intervertebral body support 100 to the posterior side 120 of the intervertebral body support 100 and are close to An end limit stopper 192 is formed at the back side 120; one side of the connecting piece 300 is connected to the uncylinder joint fusion component 200, and the other side of the connecting piece 300 is provided with a sliding body 310; the sliding body 310 and the sliding groove 190 can slide Cooperate; wherein the stop body 192 is used to limit the end of the sliding groove 190, thereby restricting the installed sliding body 310. During implantation and assembly, the sliding body 310 can be inserted from the end of the sliding groove 190 close to the front side 110 and sliding inwardly along the sliding groove 190 for assembly. Using the above sliding assembly installation, on the one hand, considering that the anterior cervical decompression and fusion surgery is generally performed from the front side of the cervical spine, the implant operation is implanted from the front side of the cervical spine. After the intervertebral body support 100 is implanted, the sliding assembly from the side through the corresponding chute 190 will be more convenient to operate; on the other hand, the sliding assembly has the advantages of simple and fast installation process, which can be It is convenient for installation and assembly during operation and shortens operation time.

More specifically, in order to prevent the sliding body 310 from easily retreating and falling out after being installed in the sliding groove 190, a non-return mechanism 191 can be further provided at the end of the sliding groove 190 near the front side 110; that is, the non-return mechanism 191 can prevent After the sliding body 310 is installed, it exits. More specifically, the aforementioned non-return mechanism 191 is preferably provided with a non-return elastic piece, as shown in FIG. After that, the anti-return elastic piece recovers its deformation and blocks the sliding body 310 from exiting.

In addition, in the present invention, after the uncylinder vertebral joint fusion component 200 is assembled and assembled with the intervertebral body support body 100, the uncylinder vertebral joint fusion component 200 can move relative to the intervertebral body support body 100; the above-mentioned uncylinder joint fusion The function that the component 200 can move relative to the intervertebral body support 100 specifically includes at least one of swing, twist, and translation. Of course, a more preferred solution is to have the above-mentioned swing, twist, and translation functions at the same time; in theory, the three-dimensional activity function can be realized in time by any superimposed combination of the above-mentioned swing, twist, and translation functions. In this way, after the assembly and installation, since the unclip joint fusion component 200 has a certain amount of movement relative to the intervertebral support body 100, on the one hand, during the implantation and installation process, the movement function can achieve a certain orientation. The adjustment function reduces the pre-stress load during the installation process, and at the same time, it is easier to install because it can be adjusted to a certain position; on the other hand, it can be implanted and installed, because the hook vertebra joint fusion component 200 is supported relative to the vertebral body The body 100 has a certain amount of activity, so it can also reduce the stress concentration that exists when the patient's neck is moved after the operation, so that the stress generated by the neck movement can be distributed in each area of the fusion cage, reducing the stress concentration The risk of screw breakage, bone resorption and other problems are caused. At the same time, because of the certain amount of movement, it can produce a certain stress stimulation effect during the neck movement, which is more conducive to the patient's bone graft fusion and postoperative rehabilitation.

In addition, combined with the actual situation of the actual postoperative patient, usually the patient’s neck should be fixed as much as possible during the postoperative recovery period and the amount of activity should be reduced as much as possible; but in reality, there will inevitably be neck activity, usually this amount of activity Belongs to the situation of micro-movement activities. In the present invention, in order to enable the above-mentioned hook vertebral joint fusion component 200 to be able to move relative to the intervertebral support body 100 to match the amount of movement of the patient’s neck after surgery, the following settings can be specifically adopted: wherein the translational function corresponds to The range of translational displacement is 0-2mm; the range of swing angle corresponding to the swing function is 0-5°; the range of twist angle corresponding to the twist function is 0-5°.

More specifically, for the specific activities of the swing, twist, and translation functions of the uncoated vertebral joint fusion component 200 relative to the intervertebral support body 100, please refer to some of the figures shown in FIG. 17 and FIG. 18. An example case; where the swing function corresponds to Figure 17, the unclip joint fusion component 200 can swing up and down around the corresponding swing axis 700; without loss of generality, in the swing function, it swings up and down around the swing axis 700. The included angle between is the swing angle, and the range of the swing angle is preferably 0-5° in the present invention. In the same way, the twisting function corresponds to FIG. 18, the uncinate joint fusion component 200 can twist up and down around the corresponding twisting axis 800; without loss of generality, in the twisting function, it can rotate up and down around the twisting axis 800. The included angle between the rotations is the twist angle, and the range of the twist angle is preferably 0-5° in the present invention. In the same way, the translation function corresponding to Figure 17 and Figure 18 can be further divided into translation between different directions such as up and down, left and right, and forward and backward directions; specifically, in the translation function, it is along the corresponding direction. The range of the translational displacement is preferably set to 0-2 mm. Of course, in the case of different structures, the specific relative positions of the above-mentioned swing shaft 700 and the twist shaft 800 can be changed to realize the swing and twist functions at different positions; while the translation function can be up and down, left and right directions. And at least one of the front and rear directions can also be superimposed on any two dimensional directions or three dimensional directions to form a multi-dimensional activity function.

More specifically, in order to achieve the above-mentioned activity function, the uncylinder joint fusion component 200 and the intervertebral body support 100 of the present invention can be implemented in one of the following various ways, of course, in theory, other basically the same can also be used. Ways to realize the function of the activity:

In the first type, as shown in FIG. 10, the sliding groove 190 is a T-shaped sliding groove, the sliding body 310 is a T-shaped sliding block, and the T-shaped sliding block and the T-shaped sliding groove are in a movable fit with clearance. Among them, the above-mentioned movable fit with clearance can be set according to the requirements of the amount of movement; in theory, the greater the clearance between the T-shaped sliding block and the T-shaped chute, the greater the amount of movement. In addition, theoretically, by adopting the movable matching structure of the above gap, three relative activities of swing, twist and translation can be realized at the same time. Of course, without loss of generality, the clearance fit should ensure the effectiveness of the sliding fit between the T-shaped sliding block and the T-shaped chute, that is, it should be ensured that the T-shaped sliding block will not detach from the T-shaped chute at will.

The second type is similar to the above-mentioned T-shaped sliding block and T-shaped sliding groove. Specifically, the sliding groove 190 is set as a dovetail chute, and the sliding body 310 is set as a dovetail sliding block. The gap between the activities is realized.

The third type, as shown in FIG. 11, the sliding groove 190 is an arc-shaped sliding groove, the sliding body 310 is a cylindrical body, and the cylindrical body is hinged and matched with the arc-shaped sliding groove; wherein, the hinged fit can achieve corresponding Rotation adjustment can realize the swing function of the movable function in the present invention. In order to further realize the functions of twisting and translation, the articulation fit between the cylinder and the arc-shaped sliding groove can be further set as a clearance fit form.

The fourth type is achieved by arranging a deformable connector 300. For example, the connecting member 300 is specifically set to be a structural member with a certain elasticity; the connecting member 300 undergoes corresponding bending, twisting and other deformations to realize the function of the hook vertebra joint fusion component 200 relative to the intervertebral body support 100.

More specifically, the connecting member in the present invention may be preferably arranged in the following structure: at least two connecting members 300 are provided corresponding to each of the hook vertebral joint fusion components 200, and the connecting members 300 are spaced along the direction of the sliding groove 190. Distributedly connected to the corresponding uncrusted vertebral joint fusion component 200; each connector 300 connected to the same uncrusted vertebral joint fusion component 200 is connected to the same sliding body 310 or connected to the same uncrusted vertebra joint fusion component 200, respectively Correspondingly, a sliding body 310 is provided. As shown in FIG. 13 and FIG. 15, there are seven connecting members 300 and only one sliding body 310 is provided at the same time; and as shown in FIG. 14 and FIG. 16, it is provided with seven connections At the same time, a sliding body 310 is provided for each connecting piece 300 correspondingly. In addition, when a sliding body 310 is correspondingly provided for each connecting member 300, and the sliding groove 190 is an arc-shaped sliding groove, the sliding body 310 can also be configured as a spherical structure instead of a cylindrical structure, so as to pass the spherical structure and the arc-shaped structure. The sliding groove realizes the ball hinge fit.

In addition, when the deformable connector 300 is provided to realize the function of the hook vertebral joint fusion component 200 relative to the intervertebral body support 100; when there are multiple connectors 300, the connector 300 can be specifically set A deformed linear structure; for example, it is specifically preferably a medical-grade metal wire or a medical-grade metal spring cord. Furthermore, the elastic deformability of the metal wire or the metal spring cord is used to realize the corresponding movement function of the uncinate joint fusion component 200, and can realize the functions of swing, twist and translation at the same time; it can not only meet the requirements of the movement function, but also has a simple structure. , Convenient manufacturing and convenient installation.

In addition, in the present invention, the cofferdam 210 of the uncoated vertebral joint fusion component 200 can be configured to be at least stretchable and deformable in the direction in which the bone graft cavity 220 penetrates up and down. In this way, during the implantation and installation process, the cofferdam 210 can be stretched and deformed to facilitate the smooth implantation of the hook-cone joints with irregular spatial structure. Afterwards, it can use its elastic recovery ability to fully conform to the bone surface of the upper and lower vertebrae in the joint space of the uncinate vertebra, thereby improving the wrapping effect of the bone graft particles in the bone graft cavity and preventing shedding; in addition, it can also be used in the cervical spine of the patient after the operation. During the fretting movement, the cofferdam 210 around the bone graft cavity 220 can be compressed and deformed, so that the internal bone graft can bear more stress stimulation, reduce the shielding effect of the cofferdam 210 on the stress, and through the corresponding stress on the bone graft Stimulation can be more conducive to early bone fusion.

More specifically, the cofferdam 210 in the present invention can at least use the following methods to achieve its corresponding requirements for telescopic deformation:

In the first type, the cofferdam 210 where the unclip joint fusion component 200 is provided is made of an elastic medical-grade polymer material, for example, it may preferably be made of an elastic medical-grade rubber material or a silicone material. In this way, the unclip joint fusion component 200 can not only stretch and deform along the direction in which the bone graft cavity 220 penetrates up and down, but also has a certain deformability in the circumferential direction.

The second type, referring to FIG. 6 and FIG. 7, the cofferdam 210 that can be provided with the hook vertebral joint fusion component 200 includes an upper ring cushion layer 211, a lower ring cushion layer 212 and an elastic member 213, and the elastic member 213 is connected to the Between the ring cushion layer 211 and the lower ring cushion layer 212; through the elastic deformation ability of the elastic member 213, the purpose of being able to stretch and deform along the direction in which the bone graft cavity 220 penetrates up and down is achieved. Of course, without loss of generality, in order to ensure the ability to expand and contract along the circumferential direction of the cofferdam 210, multiple elastic members 213 may be provided, and the multiple elastic members 213 are sequentially arranged along the direction of the cofferdam 210. More specifically, the elastic member 213 may specifically be a spring or a bent flexible metal wire or a bent flexible metal sheet, etc., as shown in FIG. 6 for the configured spring structure, and as shown in FIG. 7 Flexible sheet metal structure for bending. In addition, the upper ring cushion layer 211 and the lower ring cushion layer 212 are mainly used for the connection and installation of the elastic members 213. Therefore, the upper ring cushion layer 211 and the lower ring cushion layer 212 should also have corresponding deformation capabilities to follow suit. The cofferdam 210 is deformed and deformed, for example, it can be provided as a thin-layer ring-shaped metal ring or a silicone ring.

In addition, since the cofferdam 210 in the present invention needs to be equipped with bone graft particles that can be implanted into the bone graft cavity 220, if the cofferdam 210 is provided with elastic members 213, adjacent elastic members can be further provided. 213 interweave each other to form a net-like cofferdam 210; as shown in FIG. 8 is a schematic diagram of the structure after unfolding the cofferdam 210, so that it can not only meet the telescopic deformation requirements of the cofferdam 210, but also pass through the net-like structure. The structure can effectively wrap the bone graft particles in the bone graft cavity. Moreover, the mesh structure can also form a corresponding mesh through hole structure in the thickness direction of the cofferdam 210, which can improve the penetration effect of tissues and blood, and improve the exchange of internal and external substances in the bone graft cavity 220 in the thickness direction of the cofferdam 210. .

Without loss of generality, even in the case where the cofferdam 210 with the above-mentioned mesh structure is not used, in the present invention, a plurality of through-hole structures can be arranged at intervals in the thickness direction of the cofferdam 210 to improve tissues and blood. The penetration effect. For example, when the cofferdam 210 is made of a rubber material or a silicone material, corresponding through-hole structures may be arranged at intervals in the thickness direction of the cofferdam 210.

More specifically, the intervertebral body support 100 in the present invention can be installed on the upper and lower corresponding vertebral bodies by arranging corresponding screws 400 during implantation and installation. However, in the traditional screw installation method, the intervertebral body support 100 is fixedly connected to the upper and lower vertebral bodies, resulting in that the intervertebral body support 100 does not reserve a corresponding amount of movement after installation; therefore, the present invention is further It is preferably set as follows: the intervertebral body support 100 is installed by setting the screw 400, the top screw hole 130 and the bottom screw hole 140 are provided in the intervertebral body support 100; the top screw hole 130 is from the intervertebral body support 100 The anterior side 110 penetrates and obliquely penetrates from the top side 150; the bottom screw hole 140 penetrates from the anterior side 110 of the intervertebral body support 100 and obliquely penetrates from the bottom side 160; and the top screw hole 130 and the bottom screw hole 140 One screw 400 is correspondingly provided, the screw 400 corresponding to the top screw hole 130 is used to connect to the vertebral body corresponding to the top side 150, and the screw 400 corresponding to the bottom screw hole 140 is used to connect to the vertebral body corresponding to the bottom side 160; Both the top screw hole 130 and the bottom screw hole 140 are provided with a constricted section 170 protruding inwardly of the hole, and an internal thread section is provided in the constricted section 170. The screw 400 is provided with a thread that can be threaded with the above-mentioned internal thread section. The mating external thread section 410 is provided with a polished rod section 420 between the head 430 of the screw 400 and the external thread section 410; when the screw 400 is assembled and connected to the intervertebral body support 100, the polished rod section 420 of the screw 400 and the corresponding screw The constricted section 170 of the hole is a movable fit with clearance. In this way, the smooth rod section 420 on the screw 400 is matched with the necking section 170 of the screw hole, which allows the intervertebral body support 100 to still have a certain amount of movement after implantation and installation, which can effectively reduce the postoperative screw 400. The risk of loosening, fracture, and bone resorption around the internal plant; at the same time, this design can also prevent the screw 400 from returning to a certain extent; in addition, due to a certain amount of movement, it can produce a certain stress stimulus during the neck movement The role is more conducive to the patient's bone graft fusion and postoperative rehabilitation.

In addition, the present invention further includes a guard plate 500. The guard plate 500 is arranged on the front side 110 of the intervertebral body support body 100 and is installed on the intervertebral body support body 100 by fastening screws 600. The left and right sides of the guard plate 500 The edges respectively extend to the uncinate vertebral joint fusion component 200 on the corresponding side and surround a part of the outer periphery of the uncinate vertebral joint fusion component 200. By setting the guard plate 500, it can play the role of wrapping and limiting the fusion components of the uncrusted vertebral joints on both sides, and can also prevent the bone graft particles from falling forward; at the same time, it can also serve as the installation screw 400 for the intervertebral support body 100. Limit to prevent it from exiting.

In addition, in order to prevent the fastening screw 600 from installing back nails, a corresponding anti-returning nail structure can be provided. If the corresponding shrapnel structure is provided, after the fastening screw 600 is tightened and installed, the shrapnel is blocked from the side spring at the end of the screw to limit the position. Of course, without loss of generality, other conventional anti-return structures can also be used to achieve the purpose of anti-return after the fastening screw 600 is installed.

More specifically, in order to improve the connection and limiting effect of the shield 500 and the unclip joint fusion component 200, referring to FIG. 9, the present invention further provides inwardly bent edges on the left and right sides of the shield 500 The hook 510 is provided with an elastic sheet structure 230 corresponding to the hook 510 described above on the outer peripheral side wall of the unclip joint fusion component 200. During installation, the hook 510 can be engaged with the elastic sheet structure 230 to limit the position of the uncoated vertebra joint fusion component 200, so as to prevent the uncoated vertebra joint fusion component 200 from facing the posterior side 120 where the guard plate 500 is not provided. Move in direction.

More specifically, in the present invention, the top side 150 and the bottom side 160 of the intervertebral body support 100 can be further provided with spurs 180; through the spurs 180, the top side 150 and the bottom side of the intervertebral body support 100 can be improved. 160 respectively and the connection effect between the vertebral bodies on the corresponding side.

Claims

The assembling type cervical vertebra unclip joint fusion cage includes an intervertebral body support (100) and an unclip joint fusion component (200). The uncrust vertebra joint fusion component (200) includes a ring of cofferdam (210). The inside of 210) is a bone graft cavity (220) penetrating up and down. On the left and right sides of the intervertebral support body (100), an unclip joint fusion component (200) is respectively provided; it is characterized in that it also includes a connector ( 300), the intervertebral body support (100) and the uncrusted vertebra joint fusion component (200) are arranged separately, and the intervertebral body support (100) and the uncrusted vertebra joint fusion component (200) can be connected through the connecting piece (300) Assembly and installation.
The assembling type cervical vertebra vertebrae joint fusion cage according to claim 1, characterized in that: the intervertebral body support (100) and the vertebral joint fusion component (200) are assembled by sliding installation, specifically: in the vertebral body The left and right sides of the intervertebral support body (100) are respectively provided with sliding grooves (190), and the sliding grooves (190) extend from the front side (110) of the intervertebral body support body (100) to close to the intervertebral body support body (100) The posterior side (120) of the rear side (120) is close to the posterior side (120) to form an end limit stopper (192); one side of the connecting piece (300) is connected with the hook vertebra joint fusion component (200), and the connecting piece (300) A sliding body (310) is arranged on the other side of the sliding body (310); the sliding body (310) and the sliding groove (190) can be slidably matched.
The assembled cervical uncinate joint fusion cage according to claim 2, characterized in that: a non-return mechanism (191) is provided at one end of the chute (190) near the front side (110); the aforementioned non-return mechanism ( 191) It is preferable to provide a resilient piece.
The assembling cervical vertebra uncylinder joint fusion cage according to claim 2 or 3, characterized in that: after the uncylinder vertebra joint fusion component (200) and the intervertebral support body (100) are assembled and installed, they have uncrusted vertebra joint fusion The component (200) can move relative to the intervertebral body support (100).
The assembling type cervical vertebra uncylinder fusion cage according to claim 4, characterized in that the function of the uncylinder fusion fusion component (200) relative to the intervertebral support body (100) specifically includes swinging, twisting and smoothing. At least one of the activities.
The assembled cervical uncinate joint fusion cage according to claim 5, wherein the translational displacement corresponding to the translational function is in the range of 0-2mm; the swing angle corresponding to the swinging function is in the range of 0-5° ; The twisting angle range corresponding to the twisting function is 0-5°.
The assembling type cervical vertebra uncylinder joint fusion cage according to claim 4, characterized in that the function of the uncylinder joint fusion component (200) being able to move relative to the intervertebral support body (100) is realized by one of the following specific structures :

In the first type, the sliding groove (190) is a T-shaped sliding groove, the sliding body (310) is a T-shaped sliding block, and the T-shaped sliding block and the T-shaped sliding groove have a clearance movable fit;

In the second type, the sliding groove (190) is a dovetail sliding groove, the sliding body (310) is a dovetail sliding block, and the dovetail sliding groove and the dovetail sliding block have a clearance movable fit;

In the third type, the sliding groove (190) is an arc-shaped sliding groove, the sliding body (310) is a cylinder, and the cylinder is hinged and matched with the arc-shaped sliding groove.
The assembling type cervical vertebra vertebrae joint fusion cage according to claim 4, characterized in that: the function of the uncinate vertebra joint fusion component (200) relative to the intervertebral support body (100) is to set a deformable connection The piece (300) is realized.
The assembling type cervical spine joint fusion cage according to any one of claims 2 to 8, characterized in that: at least two connectors (300) are provided corresponding to each fusion component (200) of the unclip joint , The connecting pieces (300) are connected to the corresponding uncrusted vertebra joint fusion component (200) at intervals along the direction of the chute (190); the connecting pieces (300) connected to the same uncrusted vertebra joint fusion component (200) Each connecting member (300) connected with the same sliding body (310) or connected with the same unclip joint fusion component (200) is respectively provided with a sliding body (310).
The assembled cervical uncinate joint fusion cage according to claim 9, characterized in that the connecting member (300) is a deformable linear structure; preferably, it is a medical-grade metal wire or a medical-grade metal spring cord.
The assembling type cervical vertebra uncylinder joint fusion cage according to any one of claims 1 to 10, characterized in that: the cofferdam (210) of the uncylinder joint fusion component (200) is at least able to extend along the bone graft cavity (220). ) A structure that stretches and deforms in the up and down direction.
The assembling type cervical vertebra unclip joint fusion cage according to claim 11, characterized in that: the cofferdam (210) of the unclip joint fusion component (200) is made of elastic medical-grade polymer material; preferably Made of elastic medical grade rubber material or silicone material.
The assembling type cervical vertebra uncylinder joint fusion cage according to claim 11, characterized in that: the cofferdam (210) of the uncylinder joint fusion component (200) comprises an upper ring cushion (211) and a lower ring cushion (212). ) And an elastic member (213), the elastic member (213) is connected between the upper ring cushion layer (211) and the lower ring cushion layer (212); there are multiple elastic members (213), and multiple elastic members (213) They are arranged in sequence along the direction of the cofferdam (210).
The assembled cervical uncinate joint fusion cage according to claim 13, characterized in that the elastic member (213) is a spring or an elastic metal wire arranged by bending or an elastic metal sheet arranged by bending.
The assembled cervical uncinate joint fusion cage according to claim 14, characterized in that: adjacent elastic members (213) are interwoven with each other to form a cofferdam (210) with a mesh structure.
The assembling type cervical vertebral uncinate joint fusion cage according to any one of claims 1 to 15, characterized in that it further comprises a screw (400), and a top screw hole ( 130) and bottom screw hole (140); top screw hole (130) penetrates from the front side (110) of the intervertebral body support (100) and obliquely penetrates from the top side (150); bottom screw hole (140) Pass through the anterior side (110) of the intervertebral support body (100) and obliquely pass out from the bottom side (160); a screw (400) is provided corresponding to the top screw hole (130) and the bottom screw hole (140). ); Both the top screw hole (130) and the bottom screw hole (140) are provided with a necking section (170) protruding into the hole, and an internal thread section is provided in the necking section (170), in the screw ( 400) is provided with an external thread section (410) capable of threading with the above internal thread section, and a polished rod section (420) is provided between the head (430) of the screw (400) and the external thread section (410); When the screw (400) is assembled and connected with the intervertebral body support (100), the polished rod section (420) of the screw (400) and the necked section (170) of the corresponding screw hole are in a loosely movable fit.
The assembling type cervical spine uncinate joint fusion cage according to any one of claims 1 to 16, characterized in that it further comprises a guard plate (500), and the guard plate (500) is arranged on the intervertebral support body (100) The anterior side (110) of the spine is installed on the intervertebral support body (100) through the fastening screw (600), and the left and right sides of the shield (500) extend to the corresponding uncoated vertebral joint fusion component (200). And it surrounds part of the outer periphery of the unclip joint fusion component (200); the left and right sides of the shield (500) are respectively provided with inwardly bent hooks (510), and the uncrust vertebra joint fusion component (200) The outer peripheral side wall is provided with an elastic sheet structure (230) corresponding to the hook (510); the top side (150) and the bottom side (160) of the intervertebral support body (100) are respectively provided with spurs (180); A through hole is provided in the thickness direction of the cofferdam (210).