Fusion cage system

Abstract

The invention belongs to the field of medical instruments, and particularly relates to a fusion cage system which comprises a fusion cage mechanism provided with a first end and a second end, the fusion cage mechanism is bent to be in an annular shape, and the fusion cage mechanism comprises an upper contact piece and a lower contact piece which are oppositely arranged; the first connecting piece is elastically connected between the upper contact piece and the lower contact piece; the implanting mechanism comprises a main body and a second connecting piece, and the second connecting piece penetrates through the main body to be connected with the fusion cage mechanism; the adjusting structure comprises a driver and a third connecting piece which are connected, the third connecting piece is connected with the implanting mechanism, and the relative position of the first end and the second end of the fusion cage mechanism is adjusted by changing the driver so as to adjust the torsion angle of the fusion cage mechanism till the fusion cage mechanism is attached to the surfaces of the upper vertebral body end plate and the lower vertebral body end plate. Through the arrangement, the fusion cage system is adapted to an 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, the height and shape of conventional fusion devices are fixed. Since different intervertebral positions of different human bodies have different shapes, different fusion devices are required to be placed in different positions or used for different patients. They need to be matched with appropriate specifications, and there may be a situation 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, and 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 by 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 bent and annularly arranged, the fusion device mechanism comprising an upper contact piece and a lower contact piece that are arranged opposite to each other, and a first connecting piece that elastically connects the upper contact piece and the lower contact piece; an implantation mechanism comprising a main body and a second connecting piece, the second connecting piece passing through the main body and connected to the fusion device mechanism; an adjustment structure comprising a connected driver and a third connecting piece, the third connecting piece being connected to the implantation mechanism, and the relative position of the first end and the second end of the fusion device mechanism is adjusted 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 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 piece can provide outward supporting force for the upper and lower contact pieces, thereby supporting the upper and lower vertebrae; the annular arrangement of the fusion device mechanism facilitates the adjustment of the height and torsion direction, so that the upper surface of the upper first contact piece fits the upper vertebral end plate, and the lower surface of the lower first contact piece 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 will be in an open state when the temperature of the fusion mechanism reaches a preset temperature; the number of the main bodies is two, 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, and the water inflow channel is used for physiological saline with a 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 wound 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 obtained as quickly as possible.

[0010] Preferably, the fusion system also includes 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 close to 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] Through the above arrangement, the insert can be accurately inserted into the upper and lower vertebral bodies, the insertion port 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 clamped on 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 clamp the insert, which facilitates 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 arrangement, the position and state of the fusion device mechanism are adjusted according to the data of the stress sensor so as to adapt the fusion device 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 comprises two elastic bodies arranged opposite to each other, the elastic bodies have bending portions, 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 a stable support.

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

[0025] Compared with the prior art, the contact piece of the present application has a fracture, and the two ends of the fracture are respectively a first end and a second end. The positions of the first end and the second end are adjusted by an adjustment mechanism, thereby forming a torsion of the contact piece, so that the upper and lower surfaces of the contact piece can better fit the upper and lower vertebral end plates; a first elastic connector is provided between the upper and lower contact pieces to provide support force for the upper and lower vertebrae to the upper and lower contact pieces. In addition, when the vertebral body moves, under the action of the first connector, the contact piece can still fit the upper and lower vertebral end plates. Furthermore, the fusion mechanism is composed of memory metal, which can enter the human body with the smallest volume, thereby reducing the size of the wound, and through the channel of the main body, physiological saline with a temperature close to that of the human body is introduced into the 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 diagram of the structure of a fusion device system in an embodiment of the present application;

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

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

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

[0031] Figure 5 This is a schematic diagram of the structure 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 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] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection can be a mechanical connection, or an electrical connection can be a direct connection, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The terms "top", "bottom", "above", "lower", and "on" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is 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 Figure 1-Figure 6 shown.

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

[0041] like Figure 2 As shown, the fusion device mechanism includes a contact member 1 and a first connecting member 4. The fusion device mechanism is made of a memory alloy, which is in a contracted state at low temperatures, and is in an open state when the ambient temperature reaches body temperature. It is in a contracted state when outside the body, so that it enters the human body in a state of minimum volume, thereby reducing the surgical wound and facilitating postoperative healing. Further, the fusion device mechanism is made of nickel-titanium alloy.

[0042] The contact member 1 comprises an upper contact member 2 and a lower contact member 3 which are 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 piece 1 is arranged in a ring shape and has a fracture, and the two ends of the fracture are respectively a first end 8 and a second end 9. The provision of the fracture can cause the upper contact piece 2 and the lower contact piece 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 pieces 3 not being on the same horizontal plane, that is, the contact piece 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, wherein 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 clamped 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, and in addition, a groove is provided on the first portion 24, and the opening of the groove is arranged to face backward to prevent the fusion device from retreating.

[0045] A first connection port 10 is disposed outside the first end 8 of the upper and lower contact members, and a second connection port 11 is disposed outside 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 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 degree of freedom of height change at each position of the contact member 1. When the fusion device 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 degree of 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 therewith, 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 parts, and the bending parts of the elastic bodies 5 face in two opposite directions to evenly bear the force.

[0049] like Figure 3 As shown, the implantation mechanism comprises a connection module and a push-in module. The number of the connection modules is two, and the number of the push-in modules is two.

[0050] The connection module includes a main body 12 and a second connection member 13. The main body 12 is arranged against the upper and lower contact members 3. Specifically, the main body 12 is arranged against the ends of the fracture, that is, the first end 8 is arranged against a main body 12, and the second end 9 is also arranged against a main body 12. The main body 12 is provided with a plurality of channels, including a water inflow channel 14, a water outflow channel 15, and an insert implantation channel 16. After the fusion device is inserted into the intervertebral space, since the fusion device is made of memory alloy, in order to accelerate it to reach the open state, physiological saline with a temperature similar to the body temperature is introduced, so that it is input into the water inflow channel 14, so as to accelerate the ambient temperature of the fusion device without affecting the body environment, and the input physiological saline is sucked out by a suction device near the water outflow channel 15, so that the physiological saline flows out from the water outflow channel 15 and is extracted to the outside of the body. The insert 6 is placed in the insert implantation channel 16, one end of the insert 6 is in the insertion port 7, and the other end is in the insert implantation channel 16.

[0051] The main body 12 is provided with a first hole 17, a second hole 18 and a third hole 19 in sequence along the up-down direction. The first hole 17 of the main body 12 opposite to the first end 8 is opposite to the first connection port 10 of the upper contact member 2, and the corresponding third hole 19 is opposite to the first connection port 10 of the lower contact member 3. The second hole 18 of the main body 12 opposite to the second end 9 is opposite to the second connection port 11 of the upper contact member 2, and the corresponding third hole 19 is opposite to 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 push 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 toward the position of the vertebral body in the second hole 18, thereby pushing the insert 6 therein from the insertion port 7, so that the insert 6 is inserted into the upper and lower vertebral bodies. Specifically, the push rod 21 is knocked to push the insert 6 into the vertebral body.

[0054] Adjustment mechanism, 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] The intervertebral shape is obtained based on the patient's CT and other imaging data, and the state of the contact piece 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 the present application in detail. It should be understood that the above description is only the specific implementation method of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A fusion cage system, characterized in that: include: A fusion mechanism, having a first end and a second end, the fusion mechanism is bent and arranged in a ring shape, and the fusion mechanism includes an upper contact piece and a lower contact piece that are arranged opposite to each other, and a first connecting piece that elastically connects the upper contact piece and the lower contact piece; An 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, and the relative position of the first end and the second end of the fusion mechanism is adjusted by changing the driver 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, characterized in that: 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. 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 with 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.

3. The fusion cage system according to claim 1, characterized in that: The fusion cage system also 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 implanting 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 also includes 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 device system according to claim 3, characterized in that: 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 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 device 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, characterized in that: A plurality of first connecting members are provided and evenly distributed between the upper contact member and the lower contact member.

9. The fusion cage system according to claim 1, characterized in that: The first connecting member includes two elastic bodies arranged opposite to each other, each of which has 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, characterized in that: The contact piece is made of nickel-titanium alloy.

Images