Fusion device holding device

Abstract

The present application relates to the field of medical devices, and in particular to a fusion device holding device, comprising an adjacent core shaft and a first drive assembly; the first drive assembly can drive the core shaft to rotate along its axial direction; the core shaft comprises a first flexible portion; further comprising a clamping assembly, a second flexible portion, and an inner rod adjacent in sequence; the inner rod is sleeved on the core shaft; further comprising a clamping head, a third flexible portion, an outer rod, and a second drive assembly adjacent in sequence; the clamping assembly is disposed in the clamping head; the outer rod is sleeved on the inner rod; the first flexible portion, the second flexible portion, and the third flexible portion cooperate; and further comprising a third drive assembly. The present invention achieves fixation of the fusion device holder and the fusion device through threaded connection, and prevents thread slippage and loose connection during surgery by clamping with the clamping assembly; and controls the bending of the first flexible portion, the second flexible portion, and the third flexible portion through the third drive assembly to achieve adjustable angle of the fusion device.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a fusion device holding device. Background Art

[0002] TLIF (Transforaminal Lumbar Interbody Fusion) refers to a transforaminal lumbar interbody fusion procedure. Because it is performed through a midline incision on the lateral side of the patient's spinal canal, this procedure significantly reduces the amount of muscle dissection required during surgery. TLIF also provides support and stability to the anterior column, reestablishing the normal anatomical curvature of the corresponding segment, thereby maintaining or restoring the overall physiological curvature of the lumbar spine.

[0003] However, the fusion device and its holder currently used in TLIF surgery cannot achieve an adjustable implantation angle, resulting in the final support position not fitting the end plate and poor stability. Some doctors swing the holder back and forth or tap the end of the fusion device during surgery to make the fusion device reach the ideal implantation position. The reciprocating swinging of the holder or tapping the end of the fusion device can easily cause damage to the nerve roots and dural sac, and make the TLIF surgery more complicated. In addition, because the cone end plates are concave, the gap between the two end plates is large in the center and small at the outer edges. For fusion devices whose height is greater than their width, it is easier to implant the fusion device by passing through the gap at the outer edges of the end plates in the width direction. However, after the fusion device is placed between the vertebrae, it needs to be rotated 90° to be aligned. At this time, the fusion device may rotate relative to the fusion device holding instrument, causing the holding to become loose and the thread to slip.

[0004] In view of this, how to provide a holding instrument that can adjust the implantation angle of the fusion cage and hold it stably during transforaminal lumbar interbody fusion surgery is a technical problem to be solved by the present invention. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a fusion device holding instrument and an implantation instrument assembly to solve the problems in the existing surgery.

[0006] To achieve the above-mentioned objectives and other related objectives, the present application provides, on the one hand, a fusion device holding instrument, comprising an adjacent core shaft and a first drive assembly; the first drive assembly can drive the core shaft to rotate along its axial direction; the core shaft comprises a first flexible portion; it also comprises a clamping assembly, a second flexible portion and an inner rod adjacent in sequence; the inner rod is sleeved on the core shaft; it also comprises a clamping head, a third flexible portion, an outer rod and a second drive assembly adjacent in sequence; the clamping assembly is arranged in the clamping head; the outer rod is sleeved on the inner rod; the second drive assembly can drive the outer rod to reciprocate relative to the extension direction of the inner rod, so that the clamping assembly protrudes or retracts the clamping head, and the clamping assembly is configured to be suitable for opening when the clamping head is protruding and closing when the clamping head is retracted; the first flexible portion, the second flexible portion and the third flexible portion cooperate with each other; it also comprises a third drive assembly for driving the third flexible portion and driving the first flexible portion and the second flexible portion to bend.

[0007] In some embodiments of the present invention, a first threaded section is provided at one end of the core shaft away from the first drive assembly.

[0008] In some embodiments of the present invention, the clamping assembly includes two clamping arms arranged opposite to each other; each of the clamping arms includes an adjacent transition arm and a gripping arm, and each of the transition arms is connected to the second flexible portion.

[0009] In some embodiments of the present invention, a hand-held portion connected to the inner rod is further included; the hand-held portion is provided with a core shaft through hole.

[0010] In some embodiments of the present invention, the second driving assembly includes a second driving portion sleeved on the inner rod, and the second driving portion is connected to the outer rod.

[0011] In some embodiments of the present invention, a second threaded section is provided on the inner rod; and a first threaded hole matching the second threaded section is provided on the second driving portion.

[0012] In some embodiments of the present invention, an inner diameter of the second driving portion is smaller than an outer diameter of the outer rod.

[0013] In some embodiments of the present invention, the inner diameter of the outer rod matches the outer diameter of the inner rod; and the inner diameter of the inner rod matches the outer diameter of the core shaft.

[0014] In some embodiments of the present invention, the invention further comprises a first transmission portion and a second transmission portion symmetrically distributed along the axis of the outer rod, and the third flexible portion and the third drive assembly are connected via the first transmission portion and the second transmission portion.

[0015] In some embodiments of the present invention, the third drive assembly includes a disc and a third drive part hinged to the center of the disc, the disc is respectively provided with a first slide groove and a second slide groove that are symmetrical relative to the center of the disc, the third drive part is provided with a first slider that can slide along the first slide groove and a second slider that can slide along the second slide groove; the first slider is connected to the first transmission part; the second slider is connected to the second transmission part.

[0016] In some embodiments of the present invention, a first clamping hole is provided on the first sliding block, a first transmission retaining member is provided in the first clamping hole, the first transmission part is connected to the first transmission retaining member and is clamped through the first clamping hole; a third sliding groove is also provided on the disc; the first transmission part can slide along the third sliding groove with the first transmission retaining member.

[0017] In some embodiments of the present invention, a second clamping hole is provided on the second sliding block, a second transmission retaining member is provided in the second clamping hole, the second transmission part is connected to the second transmission retaining member and is clamped through the second clamping hole; a fourth sliding groove is also provided on the disc, and the second transmission part can slide along the fourth sliding groove with the second transmission retaining member.

[0018] In some embodiments of the present invention, the disc is provided with angle scale markings.

[0019] In some embodiments of the present invention, a first transmission portion passing hole and a second transmission portion passing hole are respectively provided on the third flexible portion and / or the outer rod.

[0020] On the other hand, the present invention provides an implant instrument assembly, including the fusion device holding instrument as described above and a fusion device that cooperates with the fusion device holding instrument. The fusion device includes a fusion device body, and the fusion device body is provided with a clamping groove that cooperates with the clamping assembly and a second threaded hole that cooperates with the core shaft.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The fusion device provided in an embodiment of the present invention uses an external third drive assembly to adjust the angle of the intervertebral fusion device, allowing the device to achieve the ideal implant position, better match the device with the cone, increase the device's distraction effect, and improve the patient's physiological curvature recovery. The device is secured in place by both clamping and threading, eliminating the risk of thread stripping caused by overtightening. This prevents thread loosening during use and reduces the risk of the device being misaligned after implantation. This is particularly true for devices with a width smaller than height. Because the cone endplates are concave, with a large gap between the two endplates and a small gap at the outer edges, the surgeon inserts the device vertically into the intervertebral space and then rotates it 90° to place it horizontally. This lack of intervertebral visibility makes it impossible to effectively determine the device's rotational position, and a 90° rotation can lead to thread stripping and loosening. The grasping arm in the embodiment of the present invention limits the axial rotation of the device relative to the device holder, ensuring a clear view of the device's position within the intervertebral space and effectively preventing thread stripping or loosening. This provides advantages such as stable, safe, and effective gripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of the fusion device holding instrument of the present application.

[0024] Figure 2 yes Figure 1 Magnified view of part A.

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the fusion device holding instrument of the present application from one angle.

[0026] Figure 4 yes Figure 3 Enlarged view of part B.

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the fusion device holding instrument from another angle of the present application.

[0028] Figure 6 This is a schematic diagram of the main structure of the fusion device holding instrument of the present application.

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping head and the third flexible part of the present application.

[0030] Figure 8 It is a schematic diagram of the internal structure of the fusion device holding instrument of the present application.

[0031] Figure 9 It is a schematic diagram of the split structure of the implant device assembly of the present application.

[0032] Component number description

[0033] 1 Fusion cage holding device

[0034] 11 Mandrel

[0035] 111 first flexible portion

[0036] 112 first thread segment

[0037] 12. First drive assembly

[0038] 131 Clamping assembly

[0039] 1311 Transition Arm

[0040] 1312 Grab Arm

[0041] 132 second flexible portion

[0042] 133 Inner rod

[0043] 141 Clamping head

[0044] 142 third flexible portion

[0045] 143 outer rod

[0046] 15 Second drive assembly

[0047] 151 Second drive unit

[0048] 1511 First threaded hole

[0049] 152 Second thread segment

[0050] 16 Third drive assembly

[0051] 161 disc

[0052] 162 Third drive unit

[0053] 1631 First Chute

[0054] 1632 Second Chute

[0055] 1641 First Slider

[0056] 1642 Second Slider

[0057] 1651 First card hole

[0058] 1652 Second card hole

[0059] 1661 First transmission retainer

[0060] 1662 Second transmission retainer

[0061] 1671 Third Chute

[0062] 1672 Fourth Chute

[0063] 168 Angle scale mark

[0064] 17 Handheld

[0065] 171 core shaft through hole

[0066] 181 First Transmission Unit

[0067] 182 Second transmission unit

[0068] 191 First transmission part through hole

[0069] 192 Second transmission part through hole

[0070] 2 Fusion device

[0071] 21 Fusion device body

[0072] 22 card slots

[0073] 23 Second threaded hole DETAILED DESCRIPTION

[0074] In the description of this application, it should be noted that the devices, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not intended to limit the limitations of the implementation of this application. Therefore, they have no technical significance. Any modification of the device, change in proportion or adjustment of the size, without affecting the efficacy and purpose of this application, should still fall within the scope of the technical content disclosed in this application. At the same time, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0075] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0076] Furthermore, in the description of the present application, unless otherwise specified, “plurality” means two or more.

[0077] like Figures 1 to 8 As shown, an embodiment of the present application provides a fusion device holding instrument 1, comprising an adjacent core shaft 11 and a first drive assembly 12; the first drive assembly 12 can drive the core shaft 11 to rotate along its axial direction; the core shaft 11 comprises a first flexible portion 111; further comprising a clamping assembly 131, a second flexible portion 132 and an inner rod 133 adjacent in sequence; the inner rod 133 is sleeved on the core shaft 11; further comprising a clamping head 141, a third flexible portion 142, an outer rod 143 and a second drive assembly 15 adjacent in sequence; the clamping assembly 131 is arranged in the clamping head 141; the outer rod 143 is sleeved on the core shaft 11; 3 is sleeved on the inner rod 133; the second drive assembly 15 is adapted to drive the outer rod 143 to reciprocate relative to the extension direction of the inner rod 133, so that the clamping assembly 131 protrudes or retracts within the clamping head 141. The clamping assembly 131 is configured to open when protruding from the clamping head 141 and close when retracting from the clamping head 141. The first flexible portion 111, the second flexible portion 132, and the third flexible portion 142 cooperate with each other; and the third drive assembly 16 is further included for driving the third flexible portion 142 and causing the first flexible portion 111 and the second flexible portion 132 to bend. The inner rod 133 and the outer rod 143 are both hollow structures and extend axially through each other. The inner rod 133 and the clamping assembly 131 are axially connected, thereby enabling the clamping assembly 131 to be clamped in conjunction with the clamping head 141 to squeeze the clamping assembly 131. The coordination among the first flexible portion 111, the second flexible portion 132, and the third flexible portion 142 specifically means that the second flexible portion 132 axially spans the first flexible portion 111, and the third flexible portion 142 axially spans the second flexible portion 132, thereby enabling the third drive assembly 16 to drive the first flexible portion 111 and the second flexible portion 132 to bend together with the third flexible portion 142. The present invention is targeted at TLIF surgery and is used for holding and placing a fusion device during intervertebral fusion surgery. The present invention secures the fusion device holder to the fusion device through a threaded connection, and clamps the device through the clamping assembly 131 to prevent thread slippage and loosening of the connection during surgery. The third drive assembly 16 controls the bending of the first flexible portion 111, the second flexible portion 132, and the third flexible portion 142 to achieve adjustable angle of the fusion device.

[0078] In the fusion device holding device provided in this application, Figure 1A first threaded segment 112 is provided on the end of the mandrel 11 away from the first drive assembly 12. The first threaded segment 112 engages with the second threaded hole 23 in the fusion device, thereby connecting the fusion device grasping device 1 to the fusion device. The length of the first threaded segment 112 can be, for example, 5 mm to 15 mm, 5 mm to 10 mm, or 10 mm to 15 mm.

[0079] In the fusion device holding device provided in this application, Figure 1 The first driving assembly 12 includes a first driving portion. Preferably, the first driving portion can be, for example, a rotating nut.

[0080] In the fusion device holding device provided in this application, Figure 1 The clamping assembly 131 includes two clamping arms arranged opposite to each other. Each clamping arm includes a connected transition arm 1311 and a grasping arm 1312, and each transition arm 1311 is connected to the second flexible portion 132. The transition arm 1311 cooperates with the extrusion surface of the clamping head 141, and the extrusion surface can squeeze the transition arm 1311. The grasping arm 1312 cooperates with the clamping groove 22 of the fusion device. The angle between the two transition arms 1311 can be, for example, 30° to 120°, 30° to 60°, 60° to 90°, or 90° to 120°. The angle of the clamping head 141 can be 25° to 110°, 25° to 55°, 55° to 85°, 85° to 110°, etc.

[0081] In the fusion device holding device provided in this application, Figure 1 , further comprising a handle portion 17 connected to the inner rod 133. In some embodiments, the handle portion 17 is disposed at the end of the inner rod 133 away from the clamping assembly 131. The handle portion 17 may generally extend at a certain angle to the direction in which the inner rod 133 extends, for example, perpendicularly to the direction in which the handle portion 17 extends. The handle portion 17 is convenient for gripping.

[0082] In the fusion device holding device provided in this application, Figure 1 The handle 17 is provided with a core shaft through hole 171. The core shaft through hole 171 is connected to the hollow cavity of the inner rod 133. The core shaft through hole 171 facilitates the passage of the core shaft 11.

[0083] In the fusion device holding device provided in this application, Figure 1The second drive assembly 15 includes a second drive portion 151, which is sleeved outside the inner rod 133 and connected to the outer rod 143. During use, the second drive portion 151 drives the outer rod 143 to move relative to the inner rod 133 toward the clamping assembly 131. During this movement, the clamping head 141 squeezes the clamping assembly 131, causing the angle of the clamping assembly 131 to gradually decrease, thereby controlling the closure of the clamping assembly 131. The second drive portion 151 drives the outer rod 143 to move relative to the inner rod 133 away from the clamping assembly 131, thereby resetting the clamping head 141 and the clamping assembly 131.

[0084] In the fusion device holding device provided in this application, Figure 1 The inner rod 133 is provided with a second threaded segment 152, and the driving portion is provided with a first threaded hole 1511 that mates with the second threaded segment 152. By rotating the second driving portion 151 through the mating of the first threaded hole 1511 and the second threaded segment 152, the second driving portion 151 can drive the outer rod 143 to reciprocate relative to the extension direction of the inner rod 133. In some embodiments, the length of the second threaded segment 152 can be, for example, 10 mm to 30 mm, 10 mm to 20 mm, or 20 mm to 30 mm. The length of the first threaded hole 1511 can be, for example, 5 mm to 25 mm, 5 mm to 15 mm, or 15 mm to 25 mm.

[0085] In the fusion device holding instrument provided in the present application, the clamping assembly 131 is configured to be suitable for opening when the clamping head 141 is protruding, and closing when the clamping head 141 is retracted. Specifically, the clamping assembly 131 opens when not under force, and clamps when under force. In one embodiment, the clamping head 141 generally has a size that gradually increases from the end connected to the outer rod 143 toward the end away from the outer rod 143, forming a flared structure. The clamping head 141 includes two extrusion surfaces, and the angle formed by the extension of the two extrusion surfaces is the angle of the clamping head 141. The clamping assembly 131 includes two clamping arms, and the angle between the two clamping arms is the angle of the clamping assembly 131.

[0086] In the fusion device provided herein, the inner diameter of the second drive portion 151 is smaller than the outer diameter of the outer rod 143. In some embodiments, the outer diameter of the outer rod 143 can be, for example, 4 mm to 10 mm, 4 mm to 6 mm, 6 mm to 8 mm, or 8 mm to 10 mm. The inner diameter of the second drive portion 151 can be, for example, 3 mm to 8 mm, 3 mm to 5 mm, or 5 mm to 8 mm.

[0087] In the fusion device holding device provided in the present application, the inner diameter of the outer rod 143 matches the outer diameter of the inner rod 133. Specifically, the inner diameter of the outer rod 143 is slightly larger than the outer diameter of the inner rod 133. The inner diameter of the inner rod 133 matches the outer diameter of the core shaft 11. Specifically, the inner diameter of the inner rod 133 is slightly larger than the outer diameter of the core shaft 11. The inner diameter of the outer rod 143 can be 3mm to 9mm, 3mm to 6mm, or 6mm to 9mm. The outer diameter of the inner rod 133 can be 3mm to 9mm, 3mm to 6mm, or 6mm to 9mm. The outer diameter of the core shaft 11 can be 2mm to 5mm, 2mm to 3mm, 3mm to 4mm, or 4mm to 5mm.

[0088] In the fusion device holding device provided in this application, Figure 8 , further comprising a first transmission portion 181 and a second transmission portion 182 symmetrically distributed along the axial direction of the outer rod 143, wherein the third flexible portion 142 and the third drive assembly 16 are connected via the first transmission portion 181 and the second transmission portion 182. Figure 7 The third flexible portion 142 and / or the outer rod 143 are provided with first transmission portion through holes 191 that cooperate with the first transmission portion 181. The first transmission portion 181 is sequentially connected to the third drive assembly 16 through each of the first transmission portion through holes 191. The third flexible portion 142 and / or the outer rod 143 are also provided with second transmission portion through holes 192 that cooperate with the second transmission portion 182. The second transmission portion 182 is sequentially connected to the third drive assembly 16 through each of the second transmission portion through holes 192.

[0089] In the fusion device holding device provided in this application, Figures 3-5 The third driving assembly 16 includes a disc 161 and a third driving portion 162 hinged to the center of the disc 161. Figure 1 Or 5, the disc 161 is provided with a first slide groove 1631 and a second slide groove 1632 which are symmetrical relative to the center of the disc, and the third driving part 162 is provided with a first slider 1641 which can slide along the first slide groove 1631 and a second slider 1642 which can slide along the second slide groove 1632; Figure 8 The first slider 1641 is connected to the first transmission portion 181; the second slider 1642 is connected to the second transmission portion 182. The first transmission portion 181 and the second transmission portion 182 located within the outer rod move in opposite directions. The third driving portion 162 controls the bending of the third flexible portion 142 by driving the first and second transmission portions 181, 182 in opposite directions, thereby causing the first and second flexible portions 111, 132 to bend along with the third flexible portion 142.

[0090] In some embodiments, as Figure 8The first slider 1641 is provided with a first engaging hole 1651, the first engaging hole 1651 is provided with a first transmission retaining member 1661, the first transmission portion 181 is connected to the first transmission retaining member 1661, and is engaged through the first engaging hole 1651; Figure 5 The disc 161 is further provided with a third sliding groove 1671 ; the first transmission portion 181 can slide along the third sliding groove 1671 along with the first transmission retaining member 1661 .

[0091] In some embodiments, as Figure 8 The second slider 1642 is provided with a second engaging hole 1652, and a second transmission retaining member 1662 is provided in the second engaging hole 1652. The second transmission portion 182 is connected to the second transmission retaining member 1662 and is engaged through the second engaging hole 1652. Figure 5 The disc 161 is further provided with a fourth sliding groove 1672 , and the second transmission portion 182 can slide along the fourth sliding groove 1672 along with the second transmission retaining member 1662 .

[0092] In some embodiments, the first transmission portion 181 and the second transmission portion 182 may be, for example, first and second guidewires symmetrically arranged along the axial direction of the outer rod 143. One end of the first and second guidewires are symmetrically secured to the end of the first flexible portion 111 near the clamping head 141. The first transmission portion 181, for example, the first guidewire, then passes through the third flexible portion 142 and the first transmission portion on the outer rod 143 through the hole 191 to connect with the first transmission retainer 1661 at the other end. The second transmission portion 182, for example, the guidewire, passes through the third flexible portion 142 and the second transmission portion on the outer rod 143 through the hole 192 to connect with the second transmission retainer 1662 at the other end. The first transmission retainer 1661 may be, for example, a first steel ball. The first steel ball is engaged with the first slider 1641 of the third drive portion 162 through the first engaging hole 1651. The second transmission retainer 1662 may be, for example, a second steel ball. The second steel ball is engaged with the second slider 1642 of the third drive portion 162 through the second engaging hole 1652. The third driving portion 162 can be, for example, an operating handle. For example, when the operating handle is pushed to move away from the clamping head, the first slider 1641 can slide clockwise along the first slot 1631. Simultaneously, the first engaging hole 1651 pushes the first steel ball to slide clockwise on the third slot 1671. The first steel ball is fixed to the first guide wire. When the first steel ball slides, it pulls the first guide wire away from the clamping head. Simultaneously, the second slider 1642 can slide clockwise along the second slot 1632. Simultaneously, the second engaging hole 1652 pushes the second steel ball to slide clockwise on the fourth slot 1672. The second steel ball is fixed to the second guide wire. When the second steel ball slides, the second guide wire moves toward the clamping head. That is, the first and second guide wires move in opposite directions within the outer rod. Thus, the first and second guide wires can be used to control the bending of the third flexible portion 142, thereby causing the first and second flexible portions 111 and 132 to bend along with the third flexible portion 142.

[0093] Preferably, the first chute 1631, the second chute 1632, the third chute 1671, and the fourth chute 1672 are all arc-shaped chute and are all concentric with the disc 161. The first chute 1631 may include two first sub-chute, and the first slider 1641 is clamped between the two first sub-chute, and the first slider 1641 can slide along the two first sub-chute. Similarly, the second chute 1632 may also include two second sub-chute, and the second slider 1642 is clamped between the two second sub-chute, and the second slider 1642 can slide along the second sub-chute. More preferably, the third chute 1671 is located between the two first sub-chute, spaced apart from the two first sub-chute, and extends in the same direction as the two first sub-chute. The fourth chute 1672 is located between the two second sub-chute, spaced apart from the two second sub-chute, and extends in the same direction as the two second sub-chute.

[0094] In the fusion device holding device provided in this application, the inner diameter of the first engaging hole 1651 is larger than the outer diameter of the first guide wire, the inner diameter of the second engaging hole 1652 is larger than the outer diameter of the second guide wire, the inner diameter of the first engaging hole 1651 is smaller than the diameter of the first steel ball, and the inner diameter of the second engaging hole 1652 is smaller than the diameter of the second steel ball. The inner diameters of the first engaging hole 1651 and the second engaging hole 1652 can be, for example, 0.5 mm to 2 mm. The outer diameters of the first and second guide wires can be 0.5 mm to 2 mm. The diameters of the first and second steel balls can be 0.8 mm to 2.4 mm.

[0095] The first transmission part passes through the hole 191 and docks with the end of the third chute 1671 away from the clamping head 141, forming a continuous path for the installation and sliding of the first guide wire. The second transmission part passes through the hole 192 and docks with the end of the fourth chute 1672 away from the clamping head 141, forming a continuous path for the installation and sliding of the second guide wire. The distance that the first steel ball slides in the third chute 1671 is the length of the first guide wire pulled and slid, and the distance that the first steel ball slides in the third chute 1671 is the product of the angle of rotation of the operating handle around the disk 161 and the radius of the third chute 1671. The distance that the second steel ball slides in the fourth chute 1672 is the length of the second guide wire pulled and slid, and the distance that the second steel ball slides in the fourth chute 1672 is the product of the angle of rotation of the operating handle around the disk 161 and the radius of the fourth chute 1672.

[0096] In the fusion device holding device provided in this application, Figure 6 The disc 161 is provided with an angle scale mark 168 for marking the bending angle of the third flexible portion 142 .

[0097] In the fusion device holding device provided in this application, Figure 7 The third flexible portion 142 is composed of 3-8 cylindrical thin plates connected by springs, with the length of the springs perpendicular to the plane of the pair of guide wires. This ensures stable and reliable bending, and the normal to the plane of the outer rod 143's axis remains parallel to the normal to the plane of the two guide wires after bending. The length of the third flexible portion can be, for example, 5 mm to 15 mm.

[0098] In some embodiments, the length of the second flexible portion 132 may be, for example, 8 mm to 20 mm. The length of the first flexible portion 111 may be, for example, 10 mm to 25 mm.

[0099] like Figure 9As shown, on the other hand, the present application provides an implant instrument assembly, including the fusion device holding instrument 11 described in the first aspect of the present application and a fusion device 2 that cooperates with the fusion device holding instrument 11, the fusion device 2 includes a fusion device body 21, and the fusion device body 21 is provided with a clamping groove 22 that cooperates with the clamping assembly 131 and a second threaded hole 23 that cooperates with the core shaft 11. For intervertebral fusion surgery, the fusion device 2 is held through the gap at the outer edge of the end plate in the width direction, and can be stably rotated between vertebrae to achieve the ideal implantation position of the fusion device 2 and improve the postoperative recovery effect. The present invention is aimed at TLIF surgery, and the fusion device holding instrument 1 can be used to complete the stable implantation of the fusion device, and can adjust the angle of the fusion device between the cones to achieve the ideal implantation position of the fusion device and improve the postoperative recovery effect.

[0100] In the implant device assembly provided in the present application, the diameter of the second threaded hole 23 can be, for example, 2 mm to 5 mm, 2 mm to 3 mm, 3 mm to 4 mm, or 4 mm to 5 mm.

[0101] In the implant instrument assembly provided in the present application, when in use, the outer rod 143 is first pushed toward the clamping assembly 131 by rotating the second drive assembly 15, so that the clamping head 141 squeezes the clamping assembly 131 and contracts inward, and the clamping assembly 131 docks with the clamping groove 22 of the fusion device to form a clamp; then the first drive assembly 12 is rotated to screw the first threaded segment 112 of the core shaft 11 into the second threaded hole 23 of the fusion device. Then, the fusion device is placed into the target intervertebral space, and the operating handle is pushed through the third drive assembly 16. The first slider 1641 can slide along the first slide groove 1631, and at the same time, the first engaging hole 1651 pushes the first transmission retainer 1661 to slide on the third slide groove 1671. The first transmission part 181 is fixed on the first transmission retainer 1661. When the first transmission retainer 1661 slides, it pulls the first transmission part 181 to move. The second slider 1642 can slide along the second slide groove 1632, and at the same time, the second engaging hole 1652 pushes the second transmission retainer 1662 on the fourth slide groove 1672. The second transmission portion 182 is fixed to the second transmission retainer 1662. When the second transmission retainer 1662 slides, the second transmission portion 182 moves in the opposite direction of the first transmission portion 181. For example, when the first transmission portion 181 moves away from the clamping head, the second transmission portion 182 moves toward the clamping head. Thus, the first transmission portion 181 and the second transmission portion 182 can control the bending of the third flexible portion 142, and drive the first flexible portion 111 and the second flexible portion 132 to bend along with the third flexible portion 142, thereby adjusting the placement angle of the fusion device and achieving the ideal implantation position of the fusion device. When withdrawing, the first drive assembly 12 is first rotated in the opposite direction so that the second threaded section 152 of the core shaft 11 withdraws from the second threaded hole 23 of the fusion device. Then, the second drive assembly 15 is rotated in the opposite direction to loosen the gripping arm 1312, releasing the fusion device. Finally, the third drive assembly 16 is used to straighten the first flexible portion 111, the second flexible portion 132, and the third flexible portion 142 of the fusion device holder and withdraw them from the affected intervertebral space.

[0102] In summary, the fusion device holding apparatus provided in the embodiments of the present invention adjusts the angle of the intervertebral fusion device via the external third drive assembly 16, enabling the device to achieve the ideal implant position, achieving a better fit between the device and the cone, increasing the distraction effect of the device, and improving the restoration of the patient's physiological curvature. The device is secured in place by both clamping and threading, eliminating the risk of thread stripping caused by overtightening. This prevents thread loosening during use and reduces the risk of the device being misaligned after implantation. This is particularly true for devices with a width smaller than height. Due to the concave cone endplates, the gap between the two endplates is large and the gap at the outer edges is small. When the physician inserts the device vertically into the intervertebral space and then rotates it 90° to place it horizontally, a single threaded connection is required. Due to the lack of visual field between the intervertebral spaces, the rotational state of the device within the intervertebral space cannot be effectively determined. Furthermore, a 90° rotation may cause thread stripping and loosening. In the embodiments of the present invention, the grasping arm 1312 limits the axial rotation of the device relative to the device holder, ensuring a clear view of the device within the intervertebral space and effectively preventing thread stripping or loosening. This provides advantages such as stable, safe, and effective holding.

[0103] In summary, the present application effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0104] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this application shall be covered by the claims of this application.

Claims

1. A fusion cage holding device, characterized in that: The invention comprises an adjacent core shaft (11) and a first drive assembly (12); the first drive assembly (12) can drive the core shaft (11) to rotate along its axial direction; the core shaft (11) comprises a first flexible portion (111); It also includes a clamping assembly (131), a second flexible portion (132), and an inner rod (133) that are adjacent to each other in sequence; the inner rod (133) is sleeved on the core shaft (11); The clamping assembly (131) further comprises a clamping head (141), a third flexible portion (142), an outer rod (143) and a second driving assembly (15) which are adjacent to each other in sequence; the clamping assembly (131) is arranged in the clamping head (141); the outer rod (143) is sleeved on the inner rod (133); the second driving assembly (15) can drive the outer rod (143) to reciprocate relative to the extension direction of the inner rod (133), so that the clamping assembly (131) protrudes or retracts into the clamping head (141); the clamping assembly (131) is configured to be suitable for opening when the clamping head (141) is protruding and closing when the clamping head (141) is retracted; The first flexible portion (111), the second flexible portion (132), and the third flexible portion (142) cooperate with each other; and further comprising a third driving assembly (16) for driving the third flexible portion (142) and causing the first flexible portion (111) and the second flexible portion (132) to bend; It also includes a first transmission portion (181) and a second transmission portion (182) symmetrically distributed along the axial direction of the outer rod (143), and the third flexible portion (142) and the third drive assembly (16) are connected via the first transmission portion (181) and the second transmission portion (182); The third driving assembly (16) includes a disk (161) and a third driving portion (162) hinged to the center of the disk (161); the disk (161) is provided with a first sliding groove (1631) and a second sliding groove (1632) symmetrical with respect to the center of the disk; the third driving portion (162) is provided with a first slider (1641) that can slide along the first sliding groove (1631) and a second slider (1642) that can slide along the second sliding groove (1632); the first slider (1641) is connected to the first transmission portion (181); the second slider (1642) is connected to the second transmission portion (182); A first threaded section (112) is provided at one end of the core shaft (11) away from the first drive assembly (12).

2. The fusion cage holding instrument according to claim 1, wherein: The clamping assembly (131) comprises two clamping arms arranged opposite to each other; each clamping arm comprises an adjacent transition arm (1311) and a gripping arm (1312), and each transition arm (1311) is connected to the second flexible portion (132). And / or, the fusion device holding instrument further includes a handheld portion (17) connected to the inner rod (133); the handheld portion (17) is provided with a core shaft through hole (171).

3. The fusion cage holding instrument according to claim 1, wherein: The second drive assembly (15) comprises a second drive portion (151) sleeved on the inner rod (133), and the second drive portion (151) is connected to the outer rod (143).

4. The fusion cage holding instrument according to claim 3, wherein: The inner rod (133) is provided with a second threaded section (152); the second driving portion (151) is provided with a first threaded hole (1511) that matches the second threaded section (152); And / or, the inner diameter of the second driving part (151) is smaller than the outer diameter of the outer rod (143).

5. The fusion cage holding instrument according to claim 1, wherein: The first slider (1641) is provided with a first engaging hole (1651), a first transmission retaining member (1661) is provided in the first engaging hole (1651), the first transmission portion (181) is connected to the first transmission retaining member (1661) and is engaged through the first engaging hole (1651); the disc (161) is further provided with a third sliding groove (1671); the first transmission portion (181) can slide along the third sliding groove (1671) along with the first transmission retaining member (1661); And / or, a second engaging hole (1652) is provided on the second slider (1642), a second transmission retaining member (1662) is provided in the second engaging hole (1652), the second transmission part (182) is connected to the second transmission retaining member (1662) and is engaged through the second engaging hole (1652); a fourth sliding groove (1672) is also provided on the disc (161), and the second transmission part (182) can slide along the fourth sliding groove (1672) along with the second transmission retaining member (1662).

6. The fusion cage holding instrument according to claim 1, wherein: An angle scale mark (168) is provided on the disc (161).

7. The fusion cage holding instrument according to claim 1, wherein: The third flexible portion (142) and / or the outer rod (143) are respectively provided with a first transmission portion through hole (191) and a second transmission portion through hole (192).

8. An implant device assembly, characterized in that: The invention comprises a fusion device holding instrument (1) according to any one of claims 1 to 7 and a fusion device (2) matched with the fusion device holding instrument (1), wherein the fusion device (2) comprises a fusion device body (21), and the fusion device body (21) is provided with a snap-in groove (22) matched with the clamping assembly (131) and a second threaded hole (23) matched with the core shaft (11).

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