A fusion device system

Abstract

The present application belongs to the field of medical devices, and specifically relates to a fusion device system, comprising: a fusion device mechanism having a first end and a second end, the fusion device mechanism being curved and annular, the fusion device mechanism comprising an upper contact member and a lower contact member arranged opposite to each other, and a first connector elastically connecting the upper contact member and the lower contact member; an implant mechanism comprising a main body and a second connector, the second connector passing through the main body and connected to the fusion device mechanism; an adjustment structure comprising a connected driver and a third connector, the third connector being connected to the implant mechanism, and adjusting the relative position of the first and second ends of the fusion device mechanism by changing the driver to adjust the torsion angle of the fusion device mechanism until it fits with the surfaces of the upper and lower vertebral endplates. The above-mentioned configuration is used to adapt the fusion device system to the implantation environment.

Description

Technical Field

[0001] The present application belongs to the field of medical devices, and specifically relates to a fusion device system. Background Art

[0002] Lumbar interbody fusion can effectively treat lumbar degeneration and instability. It can fuse the upper and lower vertebrae, maintain the height of the intervertebral space, reduce nerve root pressure, and maintain spinal stability.

[0003] In the prior art, conventional fusion cages have a fixed height and shape. However, since different intervertebral positions of different human bodies have different shapes, different fusion cages are required for placement in different positions or for use in different patients, and they need to be matched with appropriate specifications. In addition, there may be situations where the specifications do not match the actual placement environment, that is, the degree of freedom and personalization is low. Summary of the Invention

[0004] The present application is proposed based on the above-mentioned requirements of the prior art. The technical problem to be solved by the present application is to provide a fusion cage system that can flexibly adapt to different intervertebral environments.

[0005] In order to solve the above problems, the technical solutions provided in this application include:

[0006] A fusion device system is provided, comprising: a fusion device mechanism having a first end and a second end, the fusion device mechanism being curved and annular, the fusion device mechanism comprising an upper contact member and a lower contact member arranged opposite to each other, and a first connecting member elastically connecting the upper contact member and the lower contact member; an implantation mechanism comprising a main body and a second connecting member, the second connecting member passing through the main body and connected to the fusion device mechanism; an adjustment structure comprising a connected driver and a third connecting member, the third connecting member being connected to the implantation mechanism, and the relative position of the first end and the second end of the fusion device mechanism being adjusted by changing the driver to adjust the torsion angle of the fusion device mechanism until it is in contact with the surfaces of the upper and lower vertebral end plates.

[0007] Through the above-mentioned arrangement, the fusion device mechanism has a certain degree of freedom and can change in real time when the vertebra moves to achieve automatic adjustment. In addition, the elasticity of the first connecting member can provide outward support force for the upper and lower contact members, thereby supporting the upper and lower vertebrae; the annular arrangement of the fusion device mechanism facilitates the adjustment of height and torsional direction, so that the upper surface of the upper first contact member fits the upper vertebral end plate, and the lower surface of the lower first contact member fits the lower vertebral end plate, thereby avoiding stress concentration and causing the fusion device to sink.

[0008] Preferably, the fusion mechanism is made of memory metal, and when the temperature of the fusion mechanism reaches a preset temperature, it will be in an open state; there are two main bodies, which are respectively arranged close to the first end and the second end of the fusion mechanism, and the main body is provided with a water inflow channel and a water outflow channel extending in the front-to-back direction. The water inflow channel is used for physiological saline of preset temperature to flow into and contact the fusion mechanism, so that the fusion mechanism is in an open state, and the injected physiological saline is sucked out through a suction device at the outer opening of the water outflow channel.

[0009] The above arrangement minimizes the incision caused when the fusion device is inserted into the human body, and the opening of the fusion device is accelerated by introducing warm water, so that the desired state can be achieved as quickly as possible.

[0010] Preferably, the fusion system further comprises an insert having a component extending forward and a component extending upward or downward; an insertion port is provided at a position of the contact member near the first end and the second end, and the insertion port is adapted to the insert; an insert implantation channel is provided on the main body, which is adapted to the insert; one end of the insert is located in the insertion port, and the other end is located in the insert implantation channel.

[0011] The above arrangement allows the insert to be accurately inserted into the upper and lower vertebral bodies. The insertion opening provides positioning for the insert, and the insert channel provides an insertion path for the insert, thereby ensuring the insertion angle and insertion position of the insert.

[0012] Preferably, the implantation mechanism further comprises a pushing plate and a pushing rod, wherein the pushing plate is adapted to the implantation channel of the insert, and the insert is inserted into the upper and lower vertebral bodies by pushing the pushing rod to push the pushing plate toward the vertebral body.

[0013] The above arrangement provides a force for driving the insert into the upper and lower vertebral bodies.

[0014] Preferably, the insert comprises a first part and a second part, the left-right length of the first part is greater than the left-right length of the second part, and when the insert is inserted into the vertebral body, the first part is engaged at one side of the insertion port.

[0015] The above arrangement is used to limit the position of the insert, thereby preventing the entire insert from being inserted into the vertebral body. The first portion is used to engage the insert, thereby facilitating subsequent withdrawal and repair.

[0016] Preferably, the first end of the connecting member is provided with a first connecting port, the second end is provided with a second connecting port, one end of the second connecting member is connected to the first connecting port or the second connecting port, and the other end is exposed outside the main body.

[0017] The above arrangement enables the assembly and disassembly of the main body and the upper and lower contact pieces.

[0018] Preferably, a stress sensor is provided on the upper surface of the upper contact piece, and a stress sensor is provided on the lower surface of the lower contact piece; the stress sensor is electrically connected to the driver, and the stress sensor monitors the stress generated on the upper and lower surfaces of the contact piece in real time when the fusion mechanism is implanted between vertebrae, and the driver adjusts the state of the contact piece according to the stress data.

[0019] Through the above-mentioned settings, the position and state of the fusion device mechanism are adjusted according to the data of the stress sensor so as to adapt the mechanism to the surrounding environment.

[0020] Preferably, a plurality of first connecting members are provided and are evenly distributed between the upper contact member and the lower contact member.

[0021] The above arrangement can provide uniform support for the upper and lower contact members while flexibly adapting to the intervertebral environment.

[0022] Preferably, the first connecting member includes two elastic bodies arranged opposite to each other, the elastic bodies have a bending portion, and the bending portions of the two elastic bodies of the same connecting member face in opposite directions.

[0023] The above arrangement is used to provide stable support.

[0024] Preferably, the contact piece is made of nickel-titanium alloy.

[0025] Compared to the prior art, the contact member of the present application has a fracture, with the two ends of the fracture being a first end and a second end, respectively. The positions of the first end and the second end are adjusted by an adjustment mechanism, thereby forming a torsion of the contact member, so that the upper and lower surfaces of the contact member can better fit the upper and lower vertebral endplates. A first elastic connector is provided between the upper and lower contact members to provide support force to the upper and lower vertebrae. In addition, when the vertebral body moves, the contact member can still fit the upper and lower vertebral endplates under the action of the first connector. Furthermore, the fusion mechanism is composed of memory metal and can enter the human body with a minimal volume, thereby reducing the size of the wound. Physiological saline at a temperature close to that of the human body is introduced into the body through a channel in the main body to accelerate the opening of the fusion mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Figure 1This is a schematic structural diagram of a fusion device system in an embodiment of the present application;

[0028] Figure 2 This is a schematic structural diagram of the fusion device mechanism in an embodiment of the present application;

[0029] Figure 3 This is a structural diagram of the implantation mechanism in the embodiment of the present application;

[0030] Figure 4 This is a schematic structural diagram of an insert in an embodiment of the present application;

[0031] Figure 5 This is a schematic structural diagram of the implantation mechanism and the adjustment mechanism in the embodiment of the present application;

[0032] Figure 6 This is a schematic diagram of the fusion cage system in the embodiment of the present application when it is intervertebral.

[0033] Reference numerals:

[0034] 1. Contact member; 2. Upper contact member; 3. Lower contact member; 4. First connecting member; 5. Elastomer; 6. Insert member; 7. Insertion port; 8. First end; 9. Second end; 10. First connection port; 11. Second connection port; 12. Main body; 13. Second connecting member; 14. Water inflow channel; 15. Water outflow channel; 16. Insert member implantation channel; 17. First hole; 18. Second hole; 19. Third hole; 20. Push plate; 21. Push rod; 22. Driver; 23. Third connecting member; 24. First part; 25. Second part. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the term "connected" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0037] The terms "top," "bottom," "above," "below," and "on" used throughout the description refer to relative positions of components of a device, such as the relative positions of top and bottom substrates within a device. It will be understood that devices are multifunctional regardless of their orientation in space.

[0038] To facilitate understanding of the embodiments of the present application, further explanation will be given below with reference to specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present application.

[0039] This embodiment provides a fusion device system, such as Figures 1-6 shown.

[0040] like Figure 1 As shown, the fusion cage system includes a fusion cage mechanism, an insert 6, an implantation mechanism and an adjustment mechanism.

[0041] like Figure 2 As shown, the fusion device includes a contact member 1 and a first connector 4. The device is made of a memory alloy and is contracted at low temperatures. When the ambient temperature reaches body temperature, it opens and contracts when outside the body, minimizing its volume for insertion into the human body. This reduces the size of the surgical wound and facilitates postoperative healing. Furthermore, the device is made of a nickel-titanium alloy.

[0042] The contact member 1 comprises an upper contact member 2 and a lower contact member 3 arranged opposite to each other. The upper contact member 2 is fitted with the end plate of the upper vertebral body to support the upper vertebral body, and the lower contact member 3 is fitted with the end plate of the lower vertebral body to support the lower vertebral body.

[0043] The contact member 1 is arranged in a ring shape and has a fracture, with the two ends of the fracture being a first end 8 and a second end 9 respectively. The provision of the fracture can cause the upper contact member 2 and the lower contact member 3 to deform, and the deformation includes but is not limited to the first end 8 and the second end 9 of the upper and lower contact members 3 not being on the same horizontal plane, that is, the contact member 1 can be twisted.

[0044] The contact 1 is provided with an insertion opening 7, which is adapted to the insert 6. Specifically, the first end 8 of the upper contact 2 is provided with an insertion opening 7, and the second end 9 of the lower contact 3 is provided with a second insertion opening 7, that is, the insert 6 will be inserted into both ends of the break. The insert 6 in the insertion opening 7 at the first end 8 extends upward and forward, and the insert 6 in the insertion opening 7 at the second end 9 extends downward and forward. Figure 4As shown, the insert 6 includes a first portion 24 and a second portion 25. The length of the first portion 24 in the left-right direction is greater than the length of the second portion 25 in the left-right direction. That is, when the insert 6 is inserted into the insertion port 7, the first portion 24 is engaged at the entrance of the insertion port 7, and the second portion 25 extends to the exit of the insertion port 7. The thickness and width of the first portion 24 away from the second portion 25 are respectively smaller than the thickness and width near the second portion 25. In addition, the first portion 24 is provided with a groove, the opening of which is arranged to face backward to prevent the fusion cage from retreating.

[0045] A first connection port 10 is provided on the outside of the first end 8 of the upper and lower contact members, and a second connection port 11 is provided on the outside of the second end 9 of the upper and lower contact members. The first connection port 10 and the second connection port 11 are used to connect to the implant structure.

[0046] A stress sensor is provided on the upper surface of the upper contact piece 2, and correspondingly, a stress sensor is also provided on the lower surface of the lower contact piece 3. After the fusion device mechanism is implanted between vertebrae, the stress generated on the upper and lower surfaces of the contact piece 1 is detected in real time, thereby adjusting the state of the contact piece 1 to avoid stress concentration causing the fusion device to sink.

[0047] The first connecting member 4 is arranged between the upper contact member 2 and the lower contact member 3. The two ends of the first connecting member 4 are fixedly connected to the upper and lower contact members 3 respectively. The first connecting member 4 is elastic, that is, the interval between the upper and lower contact members 3 is adjustable. There are multiple first connecting members 4, which are evenly distributed between the upper and lower contact members 3 to provide the freedom of height change at each position of the contact member 1. When the fusion mechanism is implanted between vertebrae, the first connecting member 4 is in a compressed state to provide the required support force upward and downward. When the spacing or angle between the upper and lower vertebrae changes with the movement of the vertebrae, the distance between the upper and lower contact members 3 changes accordingly. The freedom provided by the first connecting member 4 enables the upper and lower contact members 3 to fit the upper and lower vertebral end plates and move accordingly, thereby effectively avoiding stress concentration and fusion device settlement.

[0048] Furthermore, the first connecting member 4 includes two elastic bodies 5 arranged opposite to each other, and the elastic bodies 5 have bending portions, and the bending portions of the elastic bodies 5 face in two opposite directions to evenly bear the force.

[0049] like Figure 3 As shown, the implant mechanism includes a connecting module and a pushing module. The number of the connecting modules is two, and the number of the pushing modules is two.

[0050] The connection module includes a main body 12 and a second connecting member 13. The main body 12 is positioned against the upper and lower contact members 3. Specifically, the main body 12 abuts against both ends of the fracture: one main body 12 at the first end 8 and another at the second end 9. The main body 12 is provided with multiple channels, including a water inflow channel 14, a water outflow channel 15, and an insert insertion channel 16. After the fusion device is inserted into the intervertebral space, since the fusion device is made of a memory alloy, to accelerate its opening, physiological saline at a temperature similar to that of the body's internal temperature is introduced into the water inflow channel 14 to increase the ambient temperature of the fusion device without affecting the internal environment. The introduced physiological saline is then aspirated near the water outflow channel 15, allowing the saline to flow out of the water outflow channel 15 and out of the body. An insert 6 is placed within the insert insertion channel 16, with one end of the insert 6 positioned within the insertion port 7 and the other end within the insert insertion channel 16.

[0051] The main body 12 is provided with a first hole 17, a second hole 18, and a third hole 19 in a vertical sequence. The first hole 17 of the main body 12, which is opposite the first end 8, is opposite the first connection port 10 of the upper contact member 2, and the corresponding third hole 19 is opposite the first connection port 10 of the lower contact member 3. The second hole 18 of the main body 12, which is opposite the second end 9, is opposite the second connection port 11 of the upper contact member 2, and the corresponding third hole 19 is opposite the second connection port 11 of the lower contact member 3.

[0052] There are multiple second connecting members 13, which pass through the first hole 17 and the third hole 19 respectively, and one end of the second connecting member 13 is connected to the first connecting port 10 by passing through the first hole 17, and the other end is exposed outside the main body 12, so as to facilitate disassembly after adjusting the fusion structure.

[0053] The insertion module includes a push plate 20 and a push rod 21. The push plate 20 is adapted to the second hole 18. By applying force to the push rod 21, the push plate 20 can be moved within the second hole 18 toward the location of the vertebral body, thereby pushing the insert 6 therein through the insertion port 7, so that the insert 6 is inserted into the upper and lower vertebral bodies. Specifically, the push rod 21 is struck to push the insert 6 into the vertebral body.

[0054] Regulating mechanisms, such as Figure 5As shown, it is connected to the implant mechanism to drive the implant mechanism to adjust the state of the fusion mechanism. The adjustment mechanism includes a driver 22 and a third connecting member 23. The driver is electrically connected to the stress sensor and can be automatically driven according to the stress size of the stress sensor to adjust the position of the upper and lower surfaces of the fusion device. Exemplarily, the driver can be an electric push rod or a hydraulic cylinder. The third connecting member 23 is adapted to the second hole 18, one end of the third connecting member 23 is relatively fixedly connected to the second hole 18, and the other end of the third connecting member 23 is fixedly connected to the driver 22. Based on the data of the stress sensor, the driver 22 adjusts the position of the first end 8 and the second end 9 to ensure that the upper contact member 2 fits the upper vertebral end plate and the lower contact member 3 fits the lower vertebral end plate, thereby achieving initial height stability, as shown Figure 6 shown.

[0055] Based on the patient's CT and other imaging data, the intervertebral shape is obtained, and the state of the contact member 1 is adjusted through the adjustment mechanism. The fusion mechanism automatically adjusts with the intervertebral movement to adapt to the stress between the vertebrae. Due to its variable characteristics, it can promote bone growth and accelerate the healing cycle.

[0056] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of this application. It should be understood that the above description is only the specific implementation methods of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A fusion cage system, characterized in that: include: A fusion mechanism having a fracture, with two ends at the fracture being a first end and a second end respectively, the fusion mechanism being bent in a ring shape, and comprising an upper contact member and a lower contact member disposed opposite to each other, and a first connecting member elastically connecting the upper contact member and the lower contact member; The implant mechanism comprises a main body and a second connecting member, wherein the second connecting member passes through the main body and is connected to the fusion device mechanism; The adjustment structure includes a connected driver and a third connecting member, wherein the third connecting member is connected to the implant mechanism. By changing the driver, the relative position of the first end and the second end of the fusion mechanism is adjusted to adjust the torsion angle of the fusion mechanism until it fits with the surface of the upper and lower vertebral end plates.

2. The fusion cage system according to claim 1, wherein: The fusion mechanism is made of memory metal and will be in an open state when the temperature of the fusion mechanism reaches a preset temperature; There are two main bodies, which are respectively arranged close to the first end and the second end of the fusion mechanism. The main body is provided with a water inflow channel and a water outflow channel extending in the front-to-back direction. The water inflow channel allows physiological saline of a preset temperature to flow into and contact the fusion mechanism, so that the fusion mechanism is in an open state. The water outflow channel sucks out the injected physiological saline through a suction device at the outer opening of the water outflow channel.

3. The fusion cage system according to claim 1, wherein: The fusion cage system further includes an insert having a component extending in a forward direction and a component extending in an upward or downward direction; The contact member is provided with an insertion opening at a position close to the first end and the second end, and the insertion opening is adapted to the insertion member; The main body is provided with an inserting member implantation channel adapted to the inserting member; One end of the insert is located in the insertion port, and the other end is located in the insert implantation channel.

4. The fusion cage system according to claim 3, characterized in that: The implantation mechanism further comprises a push plate and a push rod. The push plate is adapted to the implantation channel of the insert. The push rod is pushed to push the push plate toward the vertebral body so as to insert the insert into the upper and lower vertebral bodies.

5. The fusion cage system according to claim 3, wherein: The insert comprises a first part and a second part. The left-right length of the first part is greater than the left-right length of the second part. When the insert is inserted into the vertebral body, the first part is clamped on one side of the insertion port.

6. The fusion cage system according to claim 1, characterized in that: The first end of the contact member is provided with a first connection port, the second end is provided with a second connection port, one end of the second connection member is connected to the first connection port or the second connection port, and the other end is exposed outside the main body.

7. The fusion cage system according to claim 1, characterized in that: A stress sensor is provided on the upper surface of the upper contact piece, and a stress sensor is provided on the lower surface of the lower contact piece; the stress sensor is electrically connected to the driver, and the stress sensor monitors the stress generated on the upper and lower surfaces of the contact piece in real time when the fusion mechanism is implanted between vertebrae, and the driver adjusts the state of the contact piece according to the stress data.

8. The fusion cage system according to claim 1, wherein: A plurality of first connecting members are provided and are evenly distributed between the upper contact member and the lower contact member.

9. The fusion cage system according to claim 1, wherein: The first connecting member includes two elastic bodies arranged opposite to each other, each elastic body having a bending portion, and the bending portions of the two elastic bodies of the same connecting member face in opposite directions.

10. The fusion cage system according to claim 1, wherein: The contact piece is made of nickel-titanium alloy.

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