Intervertebral space matching combined fusion device and installation tool thereof

Abstract

The application provides an intervertebral space matching combined fusion device and an installation tool thereof, which comprises two bags and a fusion device body; each bag comprises a bag body and a connecting head arranged on one end of the bag body, the bag body has a hollow inner cavity, the connecting head is provided with a connecting head through hole communicated with the hollow inner cavity, and the connecting head is further provided with a connecting head connecting part; the top surface of the fusion device body is provided with a fusion device through hole; a spacing plate is arranged in the fusion device through hole, and all the spacing plates divide the fusion device through hole into two bag body receiving grooves with different widths; two installation through holes are arranged on one end surface of the fusion device body; each installation through hole is communicated with a corresponding bag body receiving groove, and each connecting head can be inserted into a corresponding installation through hole. The intervertebral space matching combined fusion device, the height of the bag body can be greater than the height of the fusion device body, and then the bag body filled with bone filling material can automatically fill the uneven end plate.

Description

Technical Field

[0001] This invention relates to the field of implantable device technology, and in particular to a space-intervertebral matching combined fusion device and its installation tool. Background Technology

[0002] Currently, some spinal surgeries require the injection of bone fillers. However, when using a rod-and-pin system for internal fixation, excessive injection of bone filler often leads to leakage and other drawbacks, increasing the risks for patients. There is a strong need among doctors and patients for a simpler and safer interbody fusion device to improve this situation. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the technical problem solved by the present invention is to provide a space-matching combined fusion device and its installation tool that can avoid excessive injection of bone filler and prevent leakage of bone filler.

[0004] To achieve the above and other related objectives, the present invention provides a space-intervertebral matching combined fusion device, comprising: two pouches and a fusion unit body;

[0005] Each of the bags includes a bag body and a connector disposed at one end of the bag body. The bag body has a hollow inner cavity, and the connector is provided with a connector through hole communicating with the hollow inner cavity; the connector is also provided with a connector connection part.

[0006] The top surface of the fusion device body is provided with a fusion device through hole; the length direction of the fusion device through hole is in the same direction as the length direction of the fusion device body; a partition plate is provided in the fusion device through hole, and all the partition plates divide the fusion device through hole into two bladder storage slots of different widths; each bladder storage slot is for inserting the bladder body; two mounting through holes are provided on one end face of the fusion device body; the mounting through holes correspond one-to-one with the bladder storage slots, each mounting through hole is connected to the corresponding bladder storage slot, and each connector can be inserted into the corresponding mounting through hole.

[0007] Preferably, the bag body has a mesh structure, the width of the mesh openings of the bag body is less than or equal to 70 μm, and the length of the mesh openings of the bag body is less than or equal to 70 μm.

[0008] Preferably, the length of the bag body is greater than the length of the through hole of the fusion device.

[0009] Preferably, a support head is provided on the other end of the bag body, and two support through holes are provided on the other end face of the fusion device body. The support through holes correspond one-to-one with the bag body storage slots. Each support through hole is connected to the corresponding bag body storage slot, and each support head is inserted into the corresponding support through hole.

[0010] As described above, the intervertebral space matching combined fusion device of the present invention has the following beneficial effects:

[0011] When using the intervertebral disc matching combined fusion device of the present invention, the fusion device body is implanted between two adjacent vertebrae. The two sac-like storage slots of the fusion device body are respectively placed into the bags in their initial state. Bone filler is filled into the hollow inner cavity of the bags through the connector through hole. As the amount of bone filler added increases, the bags gradually expand. When the bags expand to their limit, bone filler can no longer be filled. At this time, the height of the bags can be greater than the height of the fusion device body. Then the bags filled with bone filler can automatically fill the uneven endplates, that is, the bags filled with bone filler match the endplates. Since the bone filler is injected into the sac, the intervertebral space matching combined fusion device can control the volume of bone filler injected, effectively preventing bone filler leakage. As the sac expands, its height gradually increases, and can exceed the height of the fusion device itself, thus restoring the physiological height of the diseased vertebra. After the sac expands, because the two sacs have equal cross-sectional areas but different widths of their receiving grooves, the two sacs can form the required height difference, allowing the intervertebral space matching combined fusion device to better match the endplate.

[0012] The present invention also relates to an installation tool for a cross-sectional intervertebral disc matching combined fusion device, for connecting the cross-sectional intervertebral disc matching combined fusion device; the installation tool includes: an injection cylinder, a push rod, and a connecting tube;

[0013] The syringe has a hollow internal structure and includes a front cylindrical section and a rear cylindrical section connected to each other. The front cylindrical section has a connector at its front end, a fixing hole on its front face, an internal thread on the wall of the fixing hole, a flow guide post on the bottom surface of the fixing hole, and a flow guide hole communicating with the front cylindrical section. The front cylindrical section includes a graduated cylindrical body and a connecting cylindrical body connected to each other, with the rear end of the connecting cylindrical body connected to the rear cylindrical section. The rear end of the rear cylindrical section has an internal thread on its inner wall.

[0014] The push rod has an annular seal on the outer surface of its front part and an external thread on the outer surface of its rear part; the external thread can be connected to the internal thread of the cylinder; the push rod is inserted into the front cylinder, and the structure of the outer circumferential surface of the annular seal is the same as the structure of the inner surface of the graduated cylinder.

[0015] The connecting pipe has an axial channel and is inserted between the inner wall of the fixing hole and the outer wall of the cylindrical guide column. The rear end of the connecting pipe is provided with an external thread, which can be connected to the internal thread of the hole. The front end of the connecting pipe is provided with a pipe body connecting part, and the joint connecting part and the pipe body connecting part are detachably connected.

[0016] Preferably, the outer surface of the syringe is provided with a flange, and the flange is covered with a blast-proof sleeve.

[0017] As described above, the installation tool for the intervertebral space matching combined fusion device of the present invention has the following beneficial effects:

[0018] The installation tool for this intervertebral space matching modular fusion device can be easily connected to the intervertebral space matching modular fusion device, making it convenient to inject bone filler into the sac. Attached Figure Description

[0019] Figure 1 The diagram shown is a three-dimensional structural schematic of the bag body of the intervertebral space matching combined fusion device in this embodiment when it is in its initial state.

[0020] Figure 2 This is a schematic diagram of the front three-dimensional structure of the sac of the intervertebral space matching combined fusion device of this embodiment when the sac is inflated.

[0021] Figure 3 The diagram shows the rear three-dimensional structure of the bladder of the intervertebral space matching combined fusion device of this embodiment when the bladder is inflated.

[0022] Figure 4 The diagram shown is a top view of the bag body of the intervertebral disc matching combined fusion device in this embodiment when it is in its initial state.

[0023] Figure 5 The diagram shown is a side view of the bladder of the intervertebral disc matching combined fusion device of this embodiment, without a support head, and in its initial state.

[0024] Figure 6 The diagram shown is a side view of the intervertebral space matching combined fusion device of this embodiment, with the bag not having a support head and the bag in an inflated state.

[0025] Figure 7 The diagram shown is a cross-sectional view of the sac of the intervertebral space matching combined fusion device of this embodiment.

[0026] Figure 8 The diagram shows a structural schematic of a bag with mesh openings on the bag body of the intervertebral disc matching combined fusion device of this embodiment.

[0027] Figure 9 This is a three-dimensional structural diagram showing the interbody fusion device assembly in this embodiment when the capsule is connected using a tool.

[0028] Figure 10 This is a three-dimensional structural diagram of the syringe used as a tool for the interbody fusion device assembly in this embodiment.

[0029] Figure 11 The diagram shows a cross-sectional view of the syringe used as a tool for the interbody fusion device assembly in this embodiment.

[0030] Figure 12 The diagram shows a three-dimensional structure of the open cone inserted into the working channel in this embodiment.

[0031] Explanation of icon numbers

[0032] 100 pouches

[0033] 110 bags

[0034] 111 Hollow inner cavity

[0035] 112 mesh

[0036] 120 connector

[0037] 121 Connector Through Hole

[0038] 130 support head

[0039] 200 Fusion Units

[0040] 210 Fusion Connector Through Hole

[0041] 211 Spacer

[0042] 212 Capsule Storage Slot

[0043] 220 mounting through hole

[0044] 230 Support through hole

[0045] 300 syringes

[0046] 310 Front cylindrical section

[0047] 311 Connector Connection Part

[0048] 312 Fixing Hole

[0049] 313 Cylindrical Guide Column

[0050] 314 guide hole

[0051] 315 graduated cylinder

[0052] 316 Connecting cylinder

[0053] 320 Rear cylindrical section

[0054] 321 Internal threaded section of cylinder

[0055] 330 flange

[0056] 340 riot control sleeve

[0057] 350 scale section

[0058] 400 putter

[0059] 410 Annular Seal

[0060] 420 Rod External Thread Section

[0061] 500 connecting pipe

[0062] 600 road cones

[0063] 700 work channels Detailed Implementation

[0064] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0065] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0066] Example 1

[0067] like Figures 1 to 8As shown, the intervertebral space matching combined fusion device of this embodiment includes: two pockets 100 and a fusion body 200;

[0068] Each of the bags 100 includes a bag body 110 and a connector 120 disposed at one end of the bag body 110. The bag body 110 has a hollow inner cavity 111. The connector 120 is provided with a connector through hole 121 communicating with the hollow inner cavity 111. The connector 120 is also provided with a connector connection part.

[0069] The fusion device body 200 has a fusion device through hole 210 on its top surface; the length direction of the fusion device through hole 210 is the same as the length direction of the fusion device body 200; a partition plate 211 is provided in the fusion device through hole 210, and all the partition plates 211 divide the fusion device through hole 210 into two bladder receiving slots 212 with different widths; each bladder receiving slot 212 is for the bladder body 110 of the bladder bag 100 to be inserted; two mounting through holes 220 are provided on one end face of the fusion device body 200; the mounting through holes 220 correspond one-to-one with the bladder receiving slots 212, each mounting through hole 220 communicates with the corresponding bladder receiving slot 212, and each connector 120 can be inserted into the corresponding mounting through hole 220.

[0070] When using the intervertebral disc matching combined fusion device of the present invention, the fusion device body 200 is implanted between two adjacent vertebral bodies. The two sac-receiving slots 212 of the fusion device body 200 are respectively placed into the pouches 110 in their initial state. Bone filler is filled into the hollow inner cavity 111 of the pouches 110 through the connector through-hole 121. As the amount of bone filler added increases, the pouches 110 gradually expand. When the pouches 110 expand to their limit, no more bone filler can be added. At this point, the height of the pouches 110 is greater than the height of the fusion device body 200, and the pouches 110 filled with bone filler can automatically fill the uneven endplate. 0. Matching endplate; Since the bone filler is filled into the sac 100, the intervertebral space matching combined fusion device can control the volume of bone filler injected, effectively preventing bone filler leakage; As the height of the sac 110 gradually increases during the expansion process, the height of the sac 110 can be greater than the height of the fusion device body 200, thus the intervertebral space matching combined fusion device can restore the physiological height of the diseased vertebral body; After the sac 100 expands, since the cross-sectional areas of the two sacs 100 are equal, but the widths of the two sac receiving grooves 212 are different, the two sacs 100 can form the required height difference, and the intervertebral space matching combined fusion device can better match the endplate.

[0071] One of the bladder storage slots 212 has a width of W1, and the other bladder storage slot 212 has a width of W2, with W1 being greater than W2.

[0072] The two pouches 100 have identical structures, and in the initial state, the cross-section of the pouch body 110 of both pouches 100 is circular. The two pouches 100 are inserted from the rear of the fusion unit body 200.

[0073] Alternatively, a single sac 100 can be directly implanted into the vertebral body to fill bone defects caused by various fractures, hemangiomas, spinal tumors, and other conditions.

[0074] In this embodiment, the bag body 110 is made of polyethylene terephthalate material.

[0075] The bag body 110 has a mesh structure, with the width and length of the mesh openings 112 being less than or equal to 70 μm. When bone filler is inserted into the bag body 110, the size of the mesh openings 112 allows the bone filler to protrude from the mesh openings 112 without flowing out, thus ensuring sufficient contact and bonding between the vertebral body and the bone filler. In this embodiment, the mesh openings 112 of the bag body 110 are rectangular. The width and length of the mesh openings 112 are both 70 μm.

[0076] The length of the bag 110 is greater than the length of the fusion device through hole 210. In the initial state, the bag 110 is not filled with bone filler. At this time, the length of the bag 110 is greater than the length of the fusion device through hole 210, so that the bag 110 can be locked in the fusion device through hole 210.

[0077] like Figure 5 As shown, when the bag body 110 is in its initial state, the shape of its vertical cross-section is circular; as Figure 6 As shown, when the bag 110 is filled with bone filler and in an inflated state, the vertical cross-sectional shape of the bag 110 is elliptical. Figures 1 to 8 As shown, this structure allows the vertical height of the bag 110 to increase and the length of the bag 110 to decrease when the bag 110 is in the expanded state. When the bag 110 is in the expanded state, the length of the bag 110 is still greater than the length of the fusion device through hole 210, and the bag 110 can be locked in the bladder storage groove 212.

[0078] like Figures 1 to 8As shown, when the bag 110 is in its initial state, the vertical cross-section of the bag 110 is circular, which facilitates the insertion of the bag 110 into the fusion device body 200 or between the two cones. When the bag 110 is in its initial state, the dimension of the vertical cross-section of the bag 110 is smaller than the height of the fusion device body 200, which facilitates the insertion of the bag 110 into the fusion device body 200.

[0079] When the fusion vessel 110 is in the expanded state, it is elliptical in shape, with a larger vertical height and a smaller length, which facilitates filling the endplate or filling bone defects. When the fusion vessel 110 is in the expanded state, its vertical height is greater than the height of the fusion unit body 200, which also facilitates filling the endplate.

[0080] The other end of the bag body 110 is provided with a support head 130, and the other end face of the fusion device body 200 is provided with two support through holes 230. The support through holes 230 correspond one-to-one with the bag body receiving grooves 212, and each support through hole 230 communicates with the corresponding bag body receiving groove 212. Each support head 130 is inserted into the corresponding support through hole 230. This structure allows the bag 100 to be stably installed on the fusion device body 200.

[0081] The support through hole 230 and the mounting through hole 220 are arranged opposite to each other, and the support through hole 230 and the mounting through hole 220 are respectively located on two opposite end faces in the length direction of the fusion body 200.

[0082] like Figures 1 to 12 As shown, this embodiment also relates to an installation tool for a cross-sectional intervertebral space matching combined fusion device, used to connect the cross-sectional intervertebral space matching combined fusion device; the installation tool includes: an injection cylinder 300, a push rod 400 and a connecting tube 500;

[0083] The syringe 300 has a hollow internal structure and includes a front cylindrical section 310 and a rear cylindrical section 320 connected to each other. The front cylindrical section 310 has a cylindrical connector 311 at its front end. The front end face of the cylindrical connector 311 has a fixing hole 312. The wall of the fixing hole 312 has an internal thread. The bottom face of the fixing hole 312 has a cylindrical guide column 313. The cylindrical guide column 313 has a guide hole 125, which communicates with the front cylindrical section 310. The front cylindrical section 310 includes a graduated cylindrical body 315 and a connecting cylindrical body 316 connected to each other. The rear end of the connecting cylindrical body 316 is connected to the rear cylindrical section 320. The inner wall of the rear end of the rear cylindrical section 320 has an internal thread 321.

[0084] The push rod 400 has an annular seal 410 on the outer side of the front part and an external threaded part 420 on the outer side of the rear part. The external threaded part 420 can be connected to the internal threaded part 321 of the cylinder. The push rod 400 is inserted into the front cylinder 310. The structure of the outer circumferential surface of the annular seal 410 is the same as the structure of the inner surface of the scale cylinder 315.

[0085] The connecting pipe 500 has an axial channel. The connecting pipe 500 is inserted between the inner wall of the fixing hole 312 and the outer wall of the cylindrical guide column 313. The rear end of the connecting pipe 500 is provided with an external thread, which can be connected to the internal thread of the hole. The front end of the connecting pipe 500 is provided with a pipe body connection part, and the joint connection part and the pipe body connection part are detachably connected.

[0086] When using the installation tool for the intervertebral disc matching combined fusion device, bone filler is filled into the graduated cylinder 315. After connecting the connector on the connector 120 of the fusion device body 200 to the tube body connector of the connecting tube 500, the push rod 400 is rotated and moved, pushing the bone filler into the bag 110.

[0087] In this embodiment, the connector connection part is an internal thread provided on the wall of the connector through hole 121, and the pipe body connection part of the connecting pipe 500 is provided with an external thread. The internal thread of the connector and the external thread of the connection part can be threadedly connected. The connector connection part is not shown in the figure.

[0088] The graduated cylinder 315 is transparent and has a graduated section 350. The graduated section 350 allows medical personnel to accurately display the dosage of injected bone filler when using the installation tool. The installation tool is easy to install and disassemble for cleaning. To improve the sealing effect inside the graduated cylinder 315, the outer circumferential surface of the annular seal 410 is interference-fitted with the inner surface of the graduated cylinder 315; the annular seal 410 is an elastic component and can be a rubber sealing ring.

[0089] The outer side of the connecting cylinder 316 of the syringe 300 is provided with a flange 330, and the flange 330 is covered with a burst sleeve 340. The burst sleeve 340 is designed to prevent the syringe 300 from bursting due to excessive pressure from the bone filler during the process of the push rod 400 pushing the bone filler. The burst sleeve 340 plays a safety role.

[0090] The installation tool for this intervertebral space matching combined fusion device can be easily connected to the intervertebral space matching combined fusion device, making it easy to inject bone filler into the capsule 100.

[0091] like Figure 12As shown, the installation tool in this embodiment also includes a hole-opening cone 600 and a working channel 700. The hole-opening cone 600 can be inserted into the working channel 700 and is used for drilling.

[0092] When the pouch 100 is used to treat vertebral trauma, the bone filler injected into the pouch 100 may be bone cement. When the pouch 100 is used with the fusion device body 200 for intervertebral disc placement, the bone filler injected into the pouch 100 may be artificial bone made of decalcified bone matrix. The bone filler may also be other materials, and the material of the bone filler is not limited to bone cement and artificial bone made of decalcified bone matrix.

[0093] like Figure 1 As shown, in this embodiment, when installing the intervertebral disc matching type combined fusion device, the sac 100 is placed into the fusion device body 200, and then the fusion device body 200 is placed into the human body; or, when installing the intervertebral disc matching type combined fusion device, the fusion device body 200 is first placed into the human body, and then the sac 100 is placed into the fusion device body 200.

[0094] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0095] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A combination fusion device for intervertebral disc matching, characterized in that, include: Two sacs (100) and the fusion body (200); Each of the bags (100) includes a bag body (110) and a connector (120) disposed at one end of the bag body (110). The bag body (110) has a hollow inner cavity (111). The connector (120) is provided with a connector through hole (121) communicating with the hollow inner cavity (111). The connector (120) is also provided with a connector connection portion. The fusion device body (200) has a fusion device through hole (210) on its top surface; the length direction of the fusion device through hole (210) is the same as the length direction of the fusion device body (200); a partition plate (211) is provided in the fusion device through hole (210), and all the partition plates (211) divide the fusion device through hole (210) into two bladder storage slots (212) of different widths; each bladder storage slot (212) is for the bladder body (110) of one bladder (100) to be inserted; two mounting through holes (220) are provided on one end face of the fusion device body (200); the mounting through holes (220) correspond one-to-one with the bladder storage slots (212), each mounting through hole (220) is connected to the corresponding bladder storage slot (212), and each connector (120) can be inserted into the corresponding mounting through hole (220); The other end of the bag body (110) is provided with a support head (130), and the other end face of the fusion device body (200) is provided with two support through holes (230). The support through holes (230) correspond one-to-one with the bag body storage groove (212). Each support through hole (230) is connected to the corresponding bag body storage groove (212), and each support head (130) is inserted into the corresponding support through hole (230).

2. The intervertebral space matching combined fusion device according to claim 1, characterized in that: The bag body (110) has a mesh structure, the width of the mesh (112) of the bag body (110) is less than or equal to 70 μm, and the length of the mesh (112) of the bag body (110) is less than or equal to 70 μm.

3. The intervertebral space matching combined fusion device according to claim 1, characterized in that: The length of the bag body (110) is greater than the length of the fusion device through hole (210).

4. An installation tool for a cross-sectional intervertebral disc matching combined fusion device, characterized in that, For connecting the intervertebral space matching combined fusion device as described in any one of claims 1 to 3; The installation tool includes: a syringe (300), a plunger (400), and a connecting tube (500); The syringe (300) has a hollow interior and includes a front cylindrical section (310) and a rear cylindrical section (320) connected to each other. The front cylindrical section (310) has a cylindrical connector (311) at its front end. A fixing hole (312) is provided on the front end face of the cylindrical connector (311). The fixing hole (312) has an internal thread on its wall, and a cylindrical guide column is provided on the bottom surface of the fixing hole (312). (313) The cylindrical guide column (313) is provided with a guide hole (314), which is connected to the front cylindrical part (310); the front cylindrical part (310) includes a scaled cylindrical body (315) and a connecting cylindrical body (316) connected to each other, and the rear end of the connecting cylindrical body (316) is connected to the rear cylindrical part (320); the inner wall of the rear end of the rear cylindrical part (320) is provided with an internal threaded part (321). The push rod (400) has an annular seal (410) on the outer side of its front part and an external thread (420) on the outer side of its rear part. The external thread (420) can be connected to the internal thread (321) of the cylinder. The push rod (400) is inserted into the front cylinder (310), and the structure of the outer circumferential surface of the annular seal (410) is the same as the structure of the inner surface of the graduated cylinder (315). The connecting pipe (500) has an axial channel. The connecting pipe (500) is inserted between the inner wall of the fixing hole (312) and the outer wall of the cylindrical guide column (313). The rear end of the connecting pipe (500) is provided with an external thread, which can be connected to the internal thread of the hole. The front end of the connecting pipe (500) is provided with a pipe body connection part, and the joint connection part and the pipe body connection part are detachably connected.

5. The installation tool for the intervertebral disc matching combined fusion device according to claim 4, characterized in that: The outer surface of the injection cylinder (300) is provided with a flange (330), and the flange (330) is covered with a riot sleeve (340).

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