Integrated zero-incisura fusion cage system

Abstract

The utility model discloses an integrated zero-incisura fusion cage system. The integrated zero-incisura fusion cage system comprises a fusion cage, wherein the fusion cage comprises a main body and a supporting part which are connected; the main body is arranged in an intervertebral space to be fused with adjacent vertebrae; the supporting part is provided with elastic pieces which are symmetrically arranged on the upper side and the lower side of the body and have a component away from the body and a component in the forward direction in the natural state. The transmission mechanism is connected with the fusion cage so as to drive the fusion cage to move in the accommodating bin, so that the fusion cage is switched between a storage state and an extension state; when the fusion cage is in a storage state, the elastic sheet is stored in the storage bin, and the transmission mechanism moves the storage bin to a to-be-inserted position of the main body; when the fusion cage is in an extending state, the elastic piece extends out of the containing bin, the main body is inserted into an intervertebral space in the state, and the elastic piece is inserted into tissue near adjacent vertebrae; the containing bin is connected with the conveying mechanism and provided with a containing space for containing the fusion cage. According to the utility model, the influence on adjacent sections is avoided, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and more particularly to an integrated zero-profile fusion device system. Background Art

[0002] Anterior cervical decompression and interbody fusion has become a classic surgical procedure for treating cervical spondylosis. With the advancement of materials science, the addition of anterior plate fixation to decompression and interbody fusion not only provides immediate cervical stability after surgery, but also effectively improves the physiological curvature of the cervical spine and ensures bone graft fusion rates. Therefore, anterior decompression and interbody fusion with internal fixation has been widely accepted and used by spinal surgeons, becoming the most effective treatment and "gold standard" for cervical spondylosis and other diseases.

[0003] At present, traditional anterior cervical decompression, bone grafting, fusion and internal fixation usually adopts disc removal or subtotal vertebral resection for decompression, intervertebral bone grafting or fusion device, titanium mesh bone grafting, combined with anterior plate and screw fixation. However, anterior plate fixation has a series of internal fixation-related complications such as dysphagia, foreign body sensation in the throat, fracture and displacement of the internal fixation. In addition, anterior cervical plate placement also aggravates complications such as degeneration of the adjacent segmental intervertebral disc, loss of physiological activity, and secondary instability. Some patients have obvious symptoms and need to undergo another surgical treatment. For this reason, a zero-notch fusion device is needed, so that the implant will not contact the soft tissue of the anterior edge of the vertebral body after placement, reducing the incidence of dysphagia or swallowing discomfort caused by the stimulation of anterior cervical plate placement. Utility Model Content

[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 an integrated zero-profile fusion system to avoid the impact of the placement of anterior cervical plates in traditional surgery on adjacent segments.

[0005] In order to solve the above problems, this application is implemented by adopting the following technical solutions:

[0006] An integrated zero-profile fusion device system comprises: a fusion device comprising a connected main body and a support portion; the main body is used to be placed in the intervertebral space and fuse with adjacent vertebrae; the support portion has a spring clip, which is symmetrically arranged on the upper and lower sides of the main body, and the spring clip has a component in the direction away from the main body and a component in the forward direction in a natural state; a transmission mechanism is connected to the fusion device to drive the fusion device to move in the accommodating chamber, so that the fusion device is converted between a stored state and an extended state; when the fusion device is in the stored state, the spring clip is stored in the accommodating chamber, and the transmission mechanism moves the accommodating chamber to a position to be inserted into the main body; when the fusion device is in the extended state, the spring clip extends out of the accommodating chamber and extends away from the main body and in the forward direction. In this state, the main body is inserted into the intervertebral space, and the spring clip is inserted into the tissue near the adjacent vertebrae; the accommodating chamber is connected to the transmission mechanism and has an accommodating space for accommodating the fusion device.

[0007] With this design, the main body and the support part are placed in the intervertebral space as a whole, simplifying the surgical operation and time. At the same time, a dedicated transmission mechanism is designed to place the fusion device in the intervertebral space, avoiding the impact of the placement of anterior cervical plate on adjacent segments in traditional surgery. When the cervical spine is tilted back, the shrapnel has pressure in the opposite direction of the tilt, reducing the possibility of an increase in the opening in front of the vertebral body when the cervical spine is tilted back.

[0008] Optionally, the main body includes two preset grooves extending in the front-to-back direction, the preset grooves are arranged on the left and right sides of the main body, the outer side walls of the preset grooves have a first side wall protruding from the rear of the main body, the first side wall has a guide groove, and the bottom of the outer side wall of the preset groove is provided with a first opening connected to the outside world; the support part includes an insert, the insert is adapted to the preset groove, the insert includes a first protrusion, the first protrusion is engaged with the first opening, and the main body and the support part are relatively fixedly connected.

[0009] With this design, the support portion and the main body are fixedly connected, the connection strength is enhanced by snapping, and the support portion and the main body are prevented from moving relative to each other.

[0010] Optionally, the main body includes a first end and a second end, and a first circular hole is provided on the first end; the supporting part includes a fixing plate and a first tube, spring plates are provided on the upper and lower sides of the fixing plate, and inserts are provided on the left and right sides of the fixing plate, the fixing plate covers the first end, the first tube is provided at the center of the fixing plate, the interior of the first tube is connected with the fixing plate to form a second circular hole, and the first tube extends into the first circular hole.

[0011] With this arrangement, the bonding strength between the main body and the support portion is enhanced, the stability of the fusion device is improved, and the interference of the support portion on the middle bone grafting area is reduced.

[0012] Optionally, the spring sheet includes a middle elastic section, and strip-shaped second protrusions are symmetrically provided on the left and right sides of the spring sheet. There is a gap between the middle elastic section and the second protrusion to prevent the support part from moving in the opposite direction to the entry after implantation.

[0013] When the shrapnel is inserted into the vertebra, part of the tissue will extend into the gap between the second protrusion and the shrapnel. When a tendency to retreat occurs, it will produce huge resistance to the retreat of the shrapnel, thereby ensuring the stability of the integrated zero-profile fusion device and preventing dislocation.

[0014] Optionally, the accommodating bin has a pushing block, which is built into the accommodating space; the transmission mechanism includes an outer sleeve, a pushing rod and a fixing rod, the outer sleeve has a first space that runs through the front and back, the inner wall of one end is provided with a first thread, and the other end is connected to the accommodating bin; the pushing rod is inserted into the first space, the outer wall of one end is provided with a second thread matching the first thread, the other end protrudes from the outer sleeve and extends into the accommodating bin, and is connected to the pushing block, and the pushing rod has a second space; the fixing rod is arranged in the second space, one end of the fixing rod is fixedly connected to the pushing rod, and the other end passes through the pushing block and is connected to the support part.

[0015] With this design, the support part is controlled to move in the accommodating chamber through the transmission mechanism to achieve a contracted and expanded state. The spring sheet of the support part is kept in a contracted state before insertion, and when in the inserted position, the spring sheet is in a naturally expanded state.

[0016] Optionally, the fusion device further includes a rotating handle, which is arranged perpendicular to the transmission mechanism. A third opening is provided on a side of the rotating handle close to the outer sleeve, and the pushing rod passes through the third opening and is fixedly connected to the rotating handle.

[0017] This arrangement makes it easy for the operator to control the position of the support portion in the accommodating chamber.

[0018] Optionally, the accommodating bin includes a first plate, a second plate and a third plate, the first plate being located at the rear end of the accommodating bin, the second plate being relatively arranged on the upper and lower sides of the first plate, and the third plate being relatively arranged on the left and right sides of the first plate, protruding from the front end of the second plate, so that the front-to-back length of the second plate is smaller than the front-to-back length of the third plate; the third plate has a first groove and a second groove on the upper and lower sides of one end away from the first plate, the first groove extending backward from the end face of the front side of the accommodating bin, the second groove having an arc, extending from the upper end face in a direction having a downward vector and a backward vector, and extending in a direction parallel to the first groove; a strip plate is formed between the first groove and the second groove to provide elasticity with freedom; the third plate includes an angle limit block, the angle limit block being located at the front end of the strip plate and protruding inward; when the support portion moves toward the second limit position, the spring sheet pushes the angle limit block provided with freedom by the strip plate to move toward the direction of the first plate.

[0019] This design not only limits the backward movement of the fusion device, but also limits the angle at which the shrapnel can open up and down. By designing the strip plate, the angle limit block has the freedom provided by the strip plate. When the shrapnel moves in and out, the angle limit block also moves with it, making it easier for the shrapnel to move in and out.

[0020] Optionally, the front end of the spring is wedge-shaped.

[0021] This setting makes it easier for the shrapnel to penetrate into the relevant tissue.

[0022] Optionally, the upper surface and the lower surface of the main body are provided with a first inclined surface, and the first inclined surface abuts against the inner wall of the elastic piece at one end close to the fixing plate.

[0023] With this arrangement, the inclined surface is provided to prevent wear between the main body and the support portion, thereby enhancing the stability of the combination of the support portion and the main body.

[0024] Optionally, the pushing block includes a first block and a second block, the first block covers the second block, the centers of the first block and the second block overlap, and the first block protrudes from the second block in the up and down directions; the pushing block is adapted to the angle limit block, and when in the second limit position, the pushing block abuts against the angle limit block.

[0025] With this arrangement, the fusion device is prevented from moving forward, which facilitates the storage of the fusion device into the accommodating chamber, and enables the fusion device to move back and forth between the first limit position and the second limit position.

[0026] Compared with the existing technology, the present invention provides an integrated zero-profile fusion device system, in which the main body and the support part are assembled in vitro into an integrated fusion device and implanted into the intervertebral space to simplify the surgical operation and time. At the same time, a dedicated transmission mechanism is designed to transmit the fusion device to the predetermined position of the intervertebral space. The fusion device system of the present invention avoids the impact of the placement of anterior cervical plate on adjacent segments in traditional surgery, reduces the contact area and space between the soft tissue in front of the vertebral body and the implant, and inserts the support part from the vertebral body angle, which solves the problem of damage to the vertebral end plate and implant interference compared to the traditional zero-profile fusion device. The support part is located at the distal end of the main body, which reduces the possibility of the opening in front of the vertebral body increasing when the cervical spine is tilted backward, and reduces interference with the bone grafting area in the middle of the main body, thereby increasing the area of ​​the bone grafting area. In addition, the support part enters more of the vertebral body, which increases the stability of the fusion system. In addition, the fusion device of the present invention can be directly implanted through an endoscope, which reduces the wound compared to the traditional zero-profile fusion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 This is a first stereoscopic view of an integrated zero-profile fusion cage system provided in this embodiment;

[0029] Figure 2 is a second stereoscopic view of an integrated zero-profile fusion cage system provided in this embodiment;

[0030] Figure 3 is a cross-sectional view of an integrated zero-profile fusion cage system provided in this embodiment;

[0031] Figure 4 is a three-dimensional diagram of the fusion device provided in this embodiment;

[0032] Figure 5 is a first stereoscopic diagram of the transmission mechanism provided in this embodiment;

[0033] Figure 6 is a second stereoscopic view of the transmission mechanism provided in this embodiment;

[0034] Figure 7 is a partial schematic diagram of the transmission mechanism provided in this embodiment;

[0035] Figure 8 is a first stereoscopic view of the main body provided by this embodiment;

[0036] Figure 9 is a second stereoscopic view of the main body provided by this embodiment;

[0037] Figure 10 is a three-dimensional diagram of the support portion provided in this embodiment;

[0038] Figure 11 This is a first structural diagram of the storage bin provided in this embodiment;

[0039] Figure 12 is a second structural schematic diagram of the accommodation chamber provided in this embodiment;

[0040] Figure 13 Schematic diagram of the structure of the push block provided in this embodiment;

[0041] Figure 14 This is a schematic diagram of a first structure of the fusion device provided in this embodiment outside the accommodation chamber;

[0042] Figure 15 This is a second structural schematic diagram of the fusion device provided in this embodiment outside the accommodation chamber;

[0043] Figure 16 is a schematic structural diagram of the fusion device provided in this embodiment within the accommodation chamber;

[0044] Figure 17 This is a cross-sectional view of the fusion device provided in this embodiment placed in the accommodation chamber. Description of the drawings:

[0046] 1-fusion device; 2-main body; 200-bone graft chamber; 210-first end; 220-second end; 230-preset groove; 240-first side wall; 250-first opening; 260-first circular hole; 270-first inclined surface; 280-small hole; 3-support portion; 300-fixing plate; 310-first tube; 320-second circular hole; 330-insert; 340-first protrusion; 350-spring; 360- Second protrusion; 5-outer sleeve; 6-cylindrical handle; 7-accommodating chamber; 700-first plate; 710-second plate; 720-third plate; 8-first groove; 9-second groove; 10-strip plate; 11-angle limit block; 12-push block; 120-first block; 121-second block; 13-push rod; 14-second thread; 15-rotating handle; 16-pin; 17-fixing rod; 18-third thread. DETAILED DESCRIPTION

[0047] 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.

[0048] In the description of the embodiments of the present invention, 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. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0049] 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.

[0050] 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 of the present invention.

[0051] This embodiment provides an integrated zero-profile fusion device system. Figures 1-4 As shown, the system includes:

[0052] Fusion device 1, including a main body 2 and a support part 3;

[0053] like Figure 8 and Figure 9 As shown, the main body 2 is made of materials such as polyetheretherketone, carbon fiber reinforced polymer, titanium or alloy, and is used to be placed in the intervertebral space to support adjacent vertebrae. The center of the main body 2 has a bone grafting chamber 200 extending vertically through the center. The bone grafting chamber 200 is filled with bone grafting material to promote bone fusion. The bone grafting material can be autologous bone, allogeneic bone, or other osteoinductive material. The upper and lower surfaces of the main body 2 are generally curved and have multiple tooth-like protrusions spaced apart on the upper and lower surfaces to increase the contact area with the bone and improve the stability of the fusion device 1.

[0054] The main body 2 includes a first end 210 and a second end 220 that are opposite each other in the front-to-back direction. The first end 210 is located at the rear of the main body 2, and the second end 220 is located at the front of the main body 2. The first end 210 is connected to the support portion 3 to secure the main body 2. The main body 2 includes two pre-set grooves 230 extending in the front-to-back direction. The pre-set grooves 230 are located on the left and right sides of the main body 2. The outer sidewalls of the pre-set grooves 230 have first sidewalls 240 that protrude from the bottom of the first end 210. The first sidewalls 240 have guide grooves. Specifically, the left sidewall of the pre-set groove 230 on the left protrudes from the bottom, while the right sidewall of the pre-set groove 230 on the right protrudes from the bottom. In addition, the bottom of the outer sidewall of the pre-set groove 230 is provided with a first opening 250 that communicates with the outside. A first circular hole 260 communicating with the bone grafting chamber 200 is provided at the center of the end surface of the first end 210 , and a first inclined surface 270 is provided on the upper and lower surfaces of the main body 2 near the end surface of the first end 210 , and the first inclined surface 270 is inclined toward the center of the end surface of the first end 210 .

[0055] The second end 220 of the main body 2 is provided with a small hole 280 for placing a developing needle to improve the developing effect of a specific tissue or organ.

[0056] The support portion 3 is connected to the main body 2 and includes a first part and a second part.

[0057] The first portion is adapted to the first end 210 .

[0058] like Figure 10 As shown, the first portion includes a fixing plate 300 and a first tube 310. The fixing plate 300 covers the first end 210 and has the same width as the end surface of the first end 210. The first tube 310 is located at the center of the fixing plate 300. The first tube 310 and the fixing plate 300 are connected to form a second circular hole 320. The second circular hole 320 has a threaded interior. The first tube 310 extends into the first circular hole 260, and the two are relatively fixedly connected. The provision of the first tube 310 enhances the bonding strength between the support portion 3 and the main body 2.

[0059] The second part is arranged on both sides of the first part.

[0060] The second portion includes inserting tabs 330, which are disposed on the left and right sides of the fixing plate 300 and are adapted to fit within the preset groove 230 so as to be movable along the guide groove into the preset groove 230. A first protrusion 340 is disposed on one end of the inserting tab 330 away from the first portion. The first protrusion 340 protrudes outward, and the extension direction of the first protrusion 340 intersects with the extension direction of the inserting tab 330. During insertion of the inserting tab 330 into the preset groove 230, the first protrusion 340 engages with the first opening 250, allowing the first protrusion 340 to extend out of the preset groove 230 through the first opening 250, thereby achieving relative fixation between the support portion 3 and the main body 2.

[0061] The second portion also includes a spring clip 350, which is disposed on the upper and lower sides of the fixing plate 300. In its natural state, the spring clip 350 has a component directed away from the main body 2 and a component directed forward, and is used to be inserted into tissue near adjacent vertebrae. The spring clip 350 has a first connecting end, a first free end, and a middle elastic section. The first connecting end is the end closest to the fixing plate 300, and its inner wall abuts against the first inclined surface 270. The first free end is wedge-shaped to facilitate the insertion of the spring clip 350 into the relevant tissue and improve the stability of the spring clip 350. The first free end has an inverted triangular gap in the middle to release stress. The middle elastic section is arc-shaped, connecting the first connecting end and the first free end, and is capable of bearing and transmitting elastic force. In this embodiment, the width of the first free end is smaller than the width of the first connecting end, and the width of the middle elastic section is larger than the width of the first free end and smaller than the width of the first connecting end. The middle elastic segment is symmetrically provided with strip-shaped second protrusions 360 on either side. A gap is formed between the second protrusions 360 and the middle elastic segment. The second protrusions 360 include a second connecting end connected to the middle elastic segment and a second free end, with the second free end positioned adjacent to the first free end. The second protrusions 360 are capable of deforming relative to the middle elastic segment, forming an anti-retraction structure with the middle elastic segment to prevent the support portion 3 from moving in the opposite direction of insertion after implantation.

[0062] The transmission mechanism is connected to the support portion 3 and transmits the fusion device 1 to a predetermined position in the intervertebral space.

[0063] like Figure 5-Figure 7 As shown, the transmission mechanism includes an outer sleeve 5, which has a first space running through it from front to back, and a cylindrical handle 6 at one end. The inner wall of the cylindrical handle 6 is provided with a first thread and the outer side is provided with anti-slip lines; the other end is connected to a storage compartment 7, which has a storage space running through it from front to back. The storage space is connected to the first space, and the cross-sectional area of ​​the storage space is larger than that of the first space. The storage space is used to accommodate the fusion device 1. Figure 14-17As shown, the accommodating space has a first limiting position and a second limiting position. The fusion device 1 moves between the first limiting position and the second limiting position, so that the fusion device switches between a stored state and an extended state. When the fusion device 1 is in the first limiting position, the fusion device is in the stored state, and both are accommodated in the accommodating chamber 7. When the fusion device 1 is in the second limiting position, the fusion device is in the extended state. At this time, the spring piece 350 is in a natural state, and the spring piece 350 is fully extended out of the accommodating chamber 7 and extends away from the main body 2 and forward. In this state, the main body 2 is inserted into the intervertebral space, and the spring piece 350 is inserted into the tissue near the adjacent vertebrae.

[0064] like Figure 11 and Figure 12 As shown, the storage compartment 7 includes a first plate 700, a second plate 710, and a third plate 720. The first plate 700 is located at the rear end of the storage compartment 7 and has a second opening at its center, connecting the first space with the storage space. When the support portion 3 is in the first limited position, the fixing plate 300 abuts against the first plate 700. The second plate 710 is disposed on the upper and lower sides of the first plate 700, while the third plate 720 is disposed on the left and right sides of the first plate 700, with portions protruding from the front end of the second plate 710. The third plate 720 has a first groove 8 and a second groove 9 on the upper and lower sides of the end facing away from the first plate 700. The first groove 8 extends rearward from the front end surface, while the second groove 9 is curved, extending from the upper end surface in a direction having a downward vector and a rearward vector, extending parallel to the first groove 8. A strip plate 10 is formed between the first groove 8 and the second groove 9 to provide a certain degree of flexibility.

[0065] The third plate 720 also includes an angle limit block 11, which is located between the first groove 8 and the second groove 9, that is, the angle limit block 11 is located at the front end of the strip plate 10, and the angle limit block 11 is protruding inward. When the fusion device 1 enters the accommodating chamber 7, since the height of the support part 3 is higher than the height between the upper and lower angle limit blocks 11, during the process of entering the accommodating chamber 7, the rear end of the support part 3 pushes the angle limit block 11 provided with elastic freedom by the strip plate 10 to move inward. During this process, the spring piece 350 of the support part 3 changes from a natural state to a compressed state. The spring piece 350 first abuts against the angle limit block 11 and generates a force. When the spring piece 350 no longer contacts the angle limit block 11, the angle limit block 11 returns to its original state, and the spring piece 350 abuts against the inner wall of the second plate 710 of the accommodating chamber 7 until the fusion device 1 is located in the first limit position in the accommodating chamber 7. When the fusion device 1 exits the storage chamber 7, the width of the first free end is smaller than the width between the left and right angle limit blocks 11, so that the first free end does not contact the angle limit blocks 11. During the process of exiting the storage chamber 7, the second protrusion 360 and the middle elastic section push the angle limit block 11, which has elastic freedom provided by the strip plate 10, to deform in the direction of the first plate 700 until the fusion device 1 is located in the second limit position in the storage chamber 7. During this process, the spring piece 350 of the support part 3 changes from a compressed state to a natural state, and the angle limit block 11 returns to its original state. The angle limit block 11 is preferably arranged obliquely toward the port away from the first plate 700. This facilitates the angle limit block 11 to push to both sides, thereby more facilitating the forward and backward movement of the fusion device 1.

[0066] The distance between the two angle limit blocks 11 located on the same third plate 720 limits the upper and lower opening angles of the spring piece 350 of the support part 3. By configuring the accommodating chamber 7 with different angle limit block 11 spacings, the support part 3 can be inserted into different angles of the vertebral angle.

[0067] like Figure 13As shown, the accommodating bin 7 has a pushing block 12, which is built into the accommodating space and moves back and forth along the extension direction of the accommodating space. The pushing block 12 includes a first block 120 and a second block 121121. The first block 120 covers the second block 121121, the centers of the first block 120 and the second block 121121 overlap, and the first block 120 protrudes from the second block 121121 in the up and down directions. The pushing block 12 is adapted to the accommodating bin 7. Exemplarily, the height of the first block 120 is equal to the height between the upper and lower second plates 710 of the accommodating bin 7, and is higher than the height between the upper and lower angle limit blocks 11. The width of the first block 120 in the left and right directions is equal to the width between the left and right third plates 720 of the accommodating bin 7. The height of the second block 121121 is lower than or equal to the height between the upper and lower angle limit blocks 11. When the pushing block 12 moves to the second limit position, the angle limit block 11 abuts against the first block 120. Specifically, the front side of the angle limit block 11 abuts against the rear end face of the first block 120, limiting the forward movement of the pushing block 12. Furthermore, the angle limit block 11 abuts against the first block 120 and the second block 121121 at the same time. When the angle limit block 11 abuts against the first block 120, the lower side of the angle limit block 11 abuts against the upper end surface of the second block 121121, so as to limit the forward movement of the push block 12 while maintaining stability during the movement.

[0068] like Figure 13 As shown, the transmission mechanism further includes a push rod 13 extending in the front-to-back direction and inserted into the first space. The outer wall of the push rod 13 is provided with a second thread 14 that mates with the first thread. When the outer sleeve 5 rotates about its central axis, the first and second threads 14 enable the push rod 13 to move forward or backward relative to the outer sleeve 5.

[0069] One end of the push rod 13 protrudes from the outer sleeve 5 and extends into the receiving chamber 7. It passes through the second opening and is connected to the push block 12. Specifically, a connector is provided on the end surface near the first block 120. The front end of the push rod 13 is connected to the connector so that the push block 12 moves with the push rod 13. When the push rod 13 drives the push block 12 to move backward, the inner wall of the first plate 700 abuts against the first block 120 of the push block 12, limiting the backward movement of the push block 12. The other end of the push rod 13 protrudes from the outer sleeve 5 and is fixedly connected to the rotating handle 15. Exemplarily, the rotating handle 15 is arranged perpendicular to the push rod 13. A third opening is provided on one side of the outer sleeve 5. The push rod 13 passes through the third opening and is fixedly connected to the rotating handle 15. Specifically, a pin 16 is provided on the rotating handle 15. The pin 16 passes perpendicularly through the rotating handle 15 and the push rod 13 to fix the rotating handle 15 and the push rod 13. When the rotary handle 15 rotates, the push rod 13 is driven to rotate along with the rotary handle 15. The push rod 13 has a second space extending from front to back inside, and the second space is communicated with the accommodating space.

[0070] like Figure 3 As shown, the transmission mechanism further includes a fixing rod 17, which is fixedly connected to the pushing rod 13. The fixing rod 17 extends in the front-to-back direction and is inserted into the second space of the pushing rod 13. One end of the fixing rod 17 protrudes from the pushing rod 13, extends into the accommodating bin 7, and is connected to the support portion 3 through the pushing block 12. Exemplarily, a third thread 18 is provided on the fixing rod 17 that at least partially extends into the accommodating bin 7. The connecting member is provided with a first through-hole that passes through the front and back, and the pushing block 12 is provided with a second through-hole that passes through the front and back, the first through-hole and the second through-hole are in communication, the fixing rod 17 passes through the first through-hole and the second through-hole, and the portion provided with the third thread 18 is engaged with the thread in the second circular hole 320 on the fixing plate 300. The other end of the fixed rod 17 is fixedly connected to the rotating handle 15. For example, the fixed rod 17 is provided with a plurality of recesses spaced along the circumferential direction, and the rotating handle 15 is provided with a convex portion that matches the recess, and the recess is connected to the convex portion. When the rotating handle 15 rotates, the pushing rod 13 and the fixed rod 17 are driven to rotate along with the rotating handle 15.

[0071] Compared with the prior art, the embodiment of the present invention provides an integrated zero-profile fusion device system, in which the main body and the support part are assembled in vitro into an integrated fusion device and implanted into the intervertebral space to simplify the surgical operation and time. At the same time, a dedicated transmission mechanism is designed to transmit the fusion device to the predetermined position of the intervertebral space. The fusion device system of this embodiment avoids the impact of the placement of anterior cervical plate on adjacent segments in traditional surgery, reduces the contact area and space between the soft tissue in front of the vertebral body and the implant, and simultaneously inserts the support part from the vertebral body angle, solving the problem of damage to the vertebral end plate and implant interference compared to the traditional zero-profile. The support part is located at the distal end of the main body, which reduces the possibility of the opening in front of the vertebral body increasing when the cervical spine is tilted backward, and reduces interference with the bone grafting area in the middle of the main body, thereby increasing the area of ​​the bone grafting area. In addition, the support part enters more of the vertebral body, which increases the stability of the fusion system. In addition, the fusion device of this embodiment can be directly implanted through an endoscope, which reduces the wound compared to the traditional zero-profile fusion device.

[0072] 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. An integrated zero-profile fusion cage system, characterized in that: include: A fusion cage, comprising a main body and a support portion connected thereto; The main body is used to be placed in the intervertebral space and fused with adjacent vertebrae; The support portion has a spring sheet, which is symmetrically arranged on the upper and lower sides of the main body. The spring sheet has a component away from the main body and a component facing forward in a natural state; a transmission mechanism connected to the fusion device to drive the fusion device to move in the accommodation chamber, so as to switch the fusion device between a stored state and an extended state; When the fusion device is in a retracted state, the spring piece is received in the receiving chamber, and the transmission mechanism moves the receiving chamber to a position where the main body is to be inserted. When the fusion device is in an extended state, the spring piece extends out of the receiving chamber and extends away from the main body and forward. In this state, the main body is inserted into the intervertebral space, and the spring piece is inserted into the tissue near the adjacent vertebrae. The accommodating chamber is connected to the transmission mechanism and has an accommodating space for accommodating the fusion device.

2. The integrated zero-profile fusion cage system according to claim 1, characterized in that: The main body includes two preset grooves extending in the front-to-back direction, the preset grooves are arranged on the left and right sides of the main body, the outer side walls of the preset grooves have a first side wall protruding from the rear of the main body, the first side wall has a guide groove, and the bottom of the outer side wall of the preset groove is provided with a first opening communicating with the outside; The support portion includes an inserting piece, which is matched with the preset groove. The inserting piece includes a first protrusion, which is engaged with the first opening. The main body and the support portion are relatively fixedly connected.

3. The integrated zero-profile fusion cage system according to claim 1, characterized in that: The main body includes a first end and a second end, and the first end is provided with a first circular hole; The support portion includes a fixed plate and a first tube, wherein spring plates are provided on the upper and lower sides of the fixed plate, and inserts are provided on the left and right sides of the fixed plate. The fixed plate covers the first end, and the first tube is provided at the center of the fixed plate. The interior of the first tube is connected with the fixed plate to form a second circular hole, and the first tube extends into the first circular hole.

4. The integrated zero-profile fusion cage system according to claim 1, characterized in that: The spring piece includes a middle elastic section, and strip-shaped second protrusions are symmetrically provided on the left and right sides of the spring piece. There is a gap between the middle elastic section and the second protrusion to prevent the support part from moving in the opposite direction to the entry direction after implantation.

5. The integrated zero-profile fusion cage system according to claim 1, characterized in that: The accommodating bin has a push-in block, and the push-in block is built into the accommodating space; The transmission mechanism includes an outer sleeve, a pushing rod and a fixing rod, the outer sleeve has a first space running through it from front to back, the inner wall of one end is provided with a first thread, and the other end is connected to the accommodating bin; the pushing rod is inserted into the first space, the outer wall of one end is provided with a second thread matching the first thread, the other end protrudes from the outer sleeve and extends into the accommodating bin, and is connected to the pushing block, and the pushing rod has a second space; the fixing rod is arranged in the second space, one end of the fixing rod is fixedly connected to the pushing rod, and the other end passes through the pushing block and is connected to the support part.

6. The integrated zero-profile fusion cage system according to claim 5, characterized in that: The fusion device further includes a rotating handle, which is arranged perpendicular to the transmission mechanism. A third opening is provided on a side of the rotating handle close to the outer sleeve, and a push rod passes through the third opening and is fixedly connected to the rotating handle.

7. The integrated zero-profile fusion cage system according to claim 5, characterized in that: The storage bin includes a first plate, a second plate, and a third plate, wherein the first plate is located at the rear end of the storage bin, the second plate is relatively arranged on the upper and lower sides of the first plate, and the third plate is relatively arranged on the left and right sides of the first plate and protrudes from the front end of the second plate, and the front-to-back length of the second plate is shorter than that of the third plate; The third plate has a first groove and a second groove on the upper and lower sides of an end away from the first plate. The first groove extends rearward from the front end surface of the accommodating chamber. The second groove has an arc and extends from the upper end surface in a direction having a downward vector and a backward vector, and extends in a direction parallel to the first groove. A strip plate is formed between the first groove and the second groove to provide elasticity with freedom. The third plate includes an angle limit block, which is located at the front end of the strip plate and protrudes inward; when the support part moves toward the second limit position, the spring pushes the angle limit block with freedom provided by the strip plate to move toward the direction of the first plate.

8. The integrated zero-profile fusion cage system according to claim 1, characterized in that: The front end of the shrapnel is wedge-shaped.

9. The integrated zero-profile fusion cage system according to claim 1, characterized in that: The upper surface and the lower surface of the main body are provided with a first inclined surface, and the first inclined surface abuts against the inner wall of one end of the elastic piece close to the fixing plate.

10. The integrated zero-profile fusion cage system according to claim 7, characterized in that: The pushing block includes a first block and a second block, the first block covers the second block, the centers of the first block and the second block overlap, and the first block protrudes from the second block in the vertical direction; The pushing block is matched with the angle limiting block, and when in the second limiting position, the pushing block abuts against the angle limiting block.

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