Retrieving implantation instrument for artificial vertebral body and system for repairing vertebral body

Abstract

The embodiment of the present application provides a holding and implanting device for artificial vertebral body and a system for repairing vertebral body. The holding and implanting device for artificial vertebral body comprises a holder, a spreader and an unlocker. The holder has a holding state and a releasing state, the holder can clamp the vertebral body shell in the holding state, the holder can be separated from the vertebral body shell in the releasing state, the holder is provided with a first positioning channel and a second positioning channel, the spreader is used for cooperating with the rotating body to drive the rotating body to rotate, the unlocker can be connected with the elastic part to drive the locking part to separate from the rotating body, so that the artificial vertebral body is turned to the unlocking state, and the spreader and the unlocker are correspondingly arranged in the first positioning channel and the second positioning channel. Therefore, the holding and implanting device for artificial vertebral body has the advantages of good integration, saving of medical resources and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a device for holding and implanting artificial vertebrae and a system for repairing human vertebrae. Background Technology

[0002] Artificial vertebrae are used to treat diseases such as burst fractures of the vertebrae, kyphosis, and spinal tumors. During the operation, the damaged or diseased vertebrae of the patient need to be removed, and then a vertebral body replacement is used to maintain normal spinal load and physiological curvature.

[0003] An artificial vertebral body consists of a shell, a support, and a rotating body. The rotating body and the support are threaded together to form a single unit. The position of the rotating body determines the overall height of the artificial vertebral body. During surgery, the titanium cage needs to be cut to the actual height, resulting in poor height matching. However, after implantation, once the artificial vertebral body is in place, the rotating body is locked by an anti-retraction mechanism, making it difficult to adjust the height of the artificial vertebral body with the implantation device. This height deviation between the artificial vertebral body and the replaced diseased vertebral body leads to unsatisfactory restoration of spinal height and curvature. Summary of the Invention

[0004] This invention aims to at least partially address one of the technical problems in related technologies. To this end, embodiments of this invention provide a device for retrieving and implanting artificial vertebrae. This device offers advantages such as good integration capabilities, saving medical resources, and ease of operation.

[0005] The artificial vertebra includes a vertebral shell, a support member, and a rotating body. The rotating body is threadedly engaged with the support member and is disposed within the vertebral shell. The artificial vertebra has a locked state. In the locked state, the inner wall of the vertebral shell is provided with an elastic part and a locking part disposed on the elastic part. The locking part cooperates with the rotating body to restrict the rotating body from rotating in either a clockwise or counterclockwise direction. The elastic part is provided with a connecting part.

[0006] The artificial vertebral body retrieval and implantation device according to embodiments of the present invention includes a retrieval device, a spreader, and an unlocker.

[0007] The gripper is capable of clamping the vertebral body shell, and the gripper has a first positioning channel and a second positioning channel; the spreader is used to cooperate with the rotating body to drive the rotating body to rotate, and the unlocker is capable of being connected to the elastic part to drive the locking part to disengage from the rotating body so that the artificial vertebral body rotates to the unlocked state (in this state, the rotating body can rotate clockwise and counterclockwise), and the spreader and the unlocker are correspondingly inserted into the first positioning channel and the second positioning channel.

[0008] The artificial vertebral body retrieval and implantation device of this invention uses a retrieval device to hold the artificial vertebral body, facilitating its positioning. This allows the artificial vertebral body to be implanted into the corresponding position of the patient's diseased vertebral body. During surgery, an unlocking device disengages the locking part from the rotating body, unlocking it. In the unlocked state, with the cooperation of the expander and the unlocker, the expander engages with the rotating body to drive its rotation, allowing for secondary adjustment of the artificial vertebral body's support height to ensure a precise match between the artificial vertebral body and the patient's required support height. Therefore, the artificial vertebral body retrieval and implantation device of this invention can adjust the artificial vertebral body's height by switching between locked and unlocked states. This results in advantages such as good overall structural performance and ease of operation.

[0009] Furthermore, by setting a first positioning channel and a second positioning channel on the holder, and correspondingly inserting the retractor and unlocker into the first and second positioning channels, both the retractor and unlocker can be positioned, and their insertion can be guided effectively. This further improves the ease of operation of the artificial vertebral body retrieval and implantation device. In related technologies, during artificial vertebral body implantation surgery, the retrieval and retraction of the artificial vertebral body require separate personnel and separate instruments. The artificial vertebral body retrieval and implantation device of this invention not only integrates the functions of retrieval and retraction, but also further integrates the function of the unlocker. That is, the artificial vertebral body retrieval and implantation device of this invention integrates the holder, retractor, and unlocker into a single medical device, which not only has the advantage of occupying little space during bone grafting operations, but also allows for single-person operation. Therefore, it has the advantages of good integration capability and saving medical resources.

[0010] Therefore, the artificial vertebral body holding and implantation device of the present invention has the advantages of good integration capability, saving medical resources and convenient operation.

[0011] In some embodiments, the gripper has a convertible gripping state and a detached state, wherein in the gripping state the gripper is capable of clamping the cone-shaped housing, and in the detached state the gripper is capable of disengaging from the cone-shaped housing.

[0012] In some embodiments, the gripper includes a clamping member and a gripping cylinder having a first end and a second end disposed opposite to each other along its axial direction. The clamping member is movably disposed on the gripping cylinder along its axial direction to accommodate the clamping member transitioning between a gripping state and a released state. One of a first positioning channel and a second positioning channel is formed on the clamping member, and the other of the first positioning channel and the second positioning channel is formed on the gripping cylinder, or each of the first positioning channel and the second positioning channel is formed on the gripping cylinder.

[0013] In some embodiments, the gripper further includes an adjustment section that engages with the second end of the gripping cylinder and is connected to the clamping member so as to drive the clamping member to move axially along the gripping cylinder via the adjustment section.

[0014] In some embodiments, the adjusting part is threadedly engaged with the second end of the holding cylinder, and the adjusting part is rotatable relative to the clamping member and can push the clamping member to move along the axial direction of the holding cylinder.

[0015] In some embodiments, the clamping member is provided with one of a mating groove or a mating protrusion, and the adjusting part is provided with the other of the mating groove or the mating protrusion. The mating protrusion is rotatably fitted into the mating groove so that the clamping member can move by the movement of the adjusting part.

[0016] In some embodiments, the adjusting part or the holding cylinder is provided with an anti-detachment part to prevent the adjusting part from detaching from the holding cylinder.

[0017] In some embodiments, the clamping member includes a clamping portion and a driving rod arranged sequentially along the axial direction of the holding cylinder. The clamping portion can extend out of the first end of the holding cylinder and can clamp the cone-shaped housing. One end of the driving rod is connected to the clamping portion, and the other end of the driving rod is connected to the adjusting portion.

[0018] In some embodiments, the holding cylinder includes a main body and a mating part, and the clamping part includes a first clamping part and a second clamping part. The first clamping part and the second clamping part are arranged opposite to each other along the radial direction of the holding cylinder. The outer wall surface of each of the first clamping part and the second clamping part can abut against the inner wall surface of the mating part. The distance between the inner wall surfaces of the mating parts increases along the axial direction of the holding cylinder from the first end to the second end.

[0019] In some embodiments, the holding cylinder includes a main body and a mating part, and the clamping part includes a first clamping part and a second clamping part. The first clamping part and the second clamping part are arranged opposite to each other along the radial direction of the holding cylinder. The outer wall surface of each of the first clamping part and the second clamping part can abut against the inner wall surface of the mating part. The outer wall surface of the clamping part decreases in size along the axial direction of the holding cylinder from the first end to the second end.

[0020] In some embodiments, at least one of the first clamping portion and the second clamping portion is an elastic clamping portion.

[0021] In some embodiments, the inner wall surface of the main body and the inner wall surface of the mating part form a step at the connection, and a portion of the clamping part abuts against the step.

[0022] In some embodiments, the spreader includes a gear portion and a spreader rod, the gear portion being disposed at one end of the spreader rod, the gear portion being capable of meshing with the rotating body to drive the rotating body to rotate, the first positioning channel being a hollow cavity formed on the drive rod and extending axially along the holding cylinder, the spreader being rotatably disposed within the hollow cavity.

[0023] In some embodiments, the spreader includes a gear portion and a spreader rod. The gear portion is disposed at one end of the spreader rod and can mesh with the rotating body to drive the rotating body to rotate. The first positioning channel is a first spacer connected to the holding cylinder, and the spreader is rotatably mounted on the first spacer.

[0024] In some embodiments, the cone-shaped housing includes a base and the elastic portion. The base has a notch, and the elastic portion cantilevered onto the notch. The base has a clearance portion for allowing the spreader to pass through. The elastic portion has a connecting portion. The interior of the holding cylinder has a second spacer through which the spreader passes. The second spacer is connected to the holding cylinder. The unlocker is movably mounted on the second spacer along the axial direction of the holding cylinder, and one end of the unlocker is connected to the connecting portion to drive the locking portion to disengage from the rotating body.

[0025] In some embodiments, the unlocker includes an unlocking lever and an assembly portion, the assembly portion being connectable to the elastic portion to drive the locking portion to disengage from the rotating body.

[0026] In some embodiments, the unlocker further includes an operating handle detachably connected to the other end of the unlocker.

[0027] In some embodiments, the spreader further includes a drive handle connected to one end of the spreader away from the artificial vertebra, and the drive handle is rotatably engaged with the unlocker.

[0028] In some embodiments, the instrument for holding and implanting an artificial vertebral body further includes a secondary bone graft channel and a secondary bone graft rod. The secondary bone graft channel is connected to the vertebral body shell, and the secondary bone graft rod is inserted into the secondary bone graft channel to supplement bone graft material into the vertebral body shell through the secondary bone graft channel.

[0029] In some embodiments, the operating handle includes a handle body, a reset member, and a pressing member. The unlocker is disposed within the handle body. The pressing member has a locked state in which it is connected to the unlocker to lock the unlocker and the handle body, and an unlocked state in which it is separated from the unlocker to separate the unlocker and the handle body. The reset member enables the pressing member to move from the unlocked state to the locked state.

[0030] In some embodiments, the secondary bone graft channels are arranged side by side on the outside of the holder and are detachably connected to the holder via a connector.

[0031] In some embodiments, the secondary bone graft channel is provided with a flared portion communicating with the vertebral body shell at one end away from the secondary bone graft channel, and the inner diameter of the flared portion gradually increases in the direction away from the vertebral body shell.

[0032] In some embodiments, a clearance platform is provided on the side of the flared portion near the gripper.

[0033] The system for repairing a human vertebral body according to embodiments of the present invention may include an artificial vertebral body and a holding and implanting device for the artificial vertebral body as described in any of the above embodiments. The artificial vertebral body includes a vertebral body shell, a support member, and a rotating body. The rotating body is threadedly engaged with the support member and disposed within the vertebral body shell. The artificial vertebral body has a locked state. In the locked state, the vertebral body shell includes an elastic portion and a locking portion disposed on the elastic portion. The locking portion engages with the rotating body to restrict the rotating body from rotating in either a clockwise or counterclockwise direction. The elastic portion is provided with a connecting portion for the holding and implanting device for the artificial vertebral body. The holding and implanting device for the artificial vertebral body is the holding and implanting device for the artificial vertebral body according to any one of the above embodiments. The holding device is capable of clamping the vertebral body shell. The spreader engages with the rotating body to drive the rotating body to rotate. The unlocking device is connected to the elastic portion to drive the locking portion to disengage from the rotating body. Attached Figure Description

[0034] Figure 1This is a perspective view of an implantation device for holding and retrieving an artificial vertebral body according to an embodiment of the present invention.

[0035] Figure 2 This is another perspective view of the artificial vertebral body holding and implantation device according to an embodiment of the present invention.

[0036] Figure 3 This is a top view of the artificial vertebral body holding and implantation device according to an embodiment of the present invention.

[0037] Figure 4 yes Figure 3 A cross-sectional view along the AA direction.

[0038] Figure 5 This is a front view of the artificial vertebral body holding and implantation device according to an embodiment of the present invention.

[0039] Figure 6 yes Figure 5 A partial view.

[0040] Figure 7 yes Figure 5 A partial view.

[0041] Figure 8 yes Figure 6 A cross-sectional view along the BB direction.

[0042] Figure 9 yes Figure 7 A sectional view along the CC direction.

[0043] Figure 10 This is a partially enlarged top view of the implantation device for holding an artificial vertebral body according to an embodiment of the present invention.

[0044] Figure 11 This is a perspective view of the expander according to an embodiment of the present invention.

[0045] Figure 12 This is a three-dimensional view of the secondary bone graft channel according to an embodiment of the present invention.

[0046] Figure 13 This is a front view of the expander according to an embodiment of the present invention.

[0047] Figure 14 This is a cross-sectional view of the operating handle according to an embodiment of the present invention.

[0048] Figure 15 This is a three-dimensional view of the artificial vertebral body according to an embodiment of the present invention.

[0049] Figure 16 This is a perspective view of the cone-shaped shell and the rotating body according to an embodiment of the present invention.

[0050] Figure 17This is a schematic diagram of the structure of the cone-shaped shell according to an embodiment of the present invention.

[0051] Figure label:

[0052] 100 implantation devices;

[0053] Holder 1; clamping member 11; clamping part 111; first clamping part 1111; second clamping part 1112; drive rod 112;

[0054] Holding cylinder 12; main body 121; mating part 122; first end 123; second end 124; first positioning channel 125; second positioning channel 126; step 127; adjusting part 13; anti-detachment part 131;

[0055] Spreader 2; Gear 21; Spreading rod 22; Drive handle 23;

[0056] Unlocker 3; Unlock lever 31; Flattened section 311; Assembly part 32; Operating handle 33; Handle body 331; Insertion hole 3311; Mounting hole 3312; Reset part 332; Pressing part 333; Engaging part 3331;

[0057] Secondary bone grafting channel 4; flared opening 41;

[0058] Secondary bone graft rod 5;

[0059] Artificial vertebral body 200;

[0060] Conical shell 6; elastic part 61; locking part 62; connecting part 63; base 64; notch 641; clearance part 642;

[0061] Support component 7;

[0062] Rotating body 8. Detailed Implementation

[0063] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0064] The following is for reference. Figures 1-17 This invention describes an implantation device 100 for holding an artificial vertebral body 200 according to an embodiment of the present invention.

[0065] like Figures 15 to 17As shown, the artificial vertebra 200 includes a vertebra shell 6, a support member 7, and a rotating body 8. The rotating body 8 is threadedly engaged with the support member 7 and is disposed inside the vertebra shell 6. The artificial vertebra 200 has a locked state. In the locked state, the inner wall of the vertebra shell 6 is provided with an elastic part 61 and a locking part 62 provided on the elastic part 61. The locking part 62 cooperates with the rotating body 8 to restrict the rotating body 8 from rotating in either a clockwise or counterclockwise direction. The elastic part 61 is provided with a connecting part 63.

[0066] like Figures 1 to 10 As shown, the implantation device 100 for artificial vertebral body 200 in this embodiment of the invention includes a holder 1, a spreader 2, and an unlocker 3.

[0067] The gripper 1 is capable of clamping the vertebral body shell 6. The gripper 1 has a first positioning channel 125 and a second positioning channel 126. The spreader 2 is used to cooperate with the rotating body 8 to drive the rotating body 8 to rotate. The unlocker 3 can be connected to the elastic part 61 to drive the locking part 62 to disengage from the rotating body 8 so that the artificial vertebra 200 rotates to the unlocked state (in this state, the rotating body 8 can rotate clockwise and counterclockwise). The spreader 2 and the unlocker 3 are correspondingly inserted into the first positioning channel 125 and the second positioning channel 126.

[0068] The implantation and retrieval device 100 for an artificial vertebral body 200 of this embodiment of the invention uses a gripper 1 to hold the artificial vertebral body 200, facilitating its positioning. Thus, the artificial vertebral body 200 can be implanted into the corresponding position of the patient's diseased vertebral body using the gripper 1. During the operation, the locking part 62 is disengaged from the rotating body 8 by the unlocking device 3, thereby unlocking the device. In the unlocked state, with the cooperation of the spreader 2 and the unlocking device 3, the spreader 2 works with the rotating body 8 to drive its rotation, allowing for a secondary adjustment of the support height of the artificial vertebral body 200, ensuring a high degree of matching between the artificial vertebral body 200 and the patient's actual required support height. Therefore, the implantation and retrieval device 100 for an artificial vertebral body 200 of this embodiment of the invention can coordinate with the transition between the locked and unlocked states of the artificial vertebral body 200 and drive the adjustment of its height. This provides advantages such as good overall structural performance and convenient operation.

[0069] Furthermore, by providing a first positioning channel 125 and a second positioning channel 126 on the holder 1, and correspondingly inserting the retractor 2 and the unlocker 3 into the first positioning channel 125 and the second positioning channel 126, both the retractor 2 and the unlocker 3 can be positioned, and their insertion can be guided effectively. This further improves the ease of operation of the holding and implantation device 100 for the artificial vertebral body 200. In related technologies, during the implantation surgery of the artificial vertebral body 200, the holding and retraction of the artificial vertebral body 200 require a separate person and a separate instrument. The holding and implantation device 100 for the artificial vertebral body 200 of this embodiment not only integrates the functions of holding and retraction, but also further integrates the function of the unlocker 3. That is, the holding and implantation device 100 for the artificial vertebral body 200 of this embodiment integrates the holder 1, the retractor 2, and the unlocker 3 into the same medical device, which not only has the advantage of occupying little space for bone grafting operations, but also allows for single-person operation. Therefore, it has the advantages of good integration capabilities and saving medical resources.

[0070] Therefore, the implantation device 100 for artificial vertebral body 200 in this embodiment of the invention has the advantages of good integration capability, saving medical resources and convenient operation.

[0071] The gripper 1 has a convertible gripping state and a detached state. In the gripping state, the gripper 1 can hold the cone-shaped housing 6, and in the detached state, the gripper 1 can detach from the cone-shaped housing 6. This improves the flexibility of the gripper 1 in engaging with the cone-shaped housing 6.

[0072] Optionally, the connecting portion 63 on the elastic portion 61 can be a threaded connection hole.

[0073] like Figure 3 , Figure 8 and Figure 10 As shown, the gripper 1 includes a clamping member 11 and a gripping cylinder 12. The gripping cylinder 12 has a first end 123 and a second end 124 disposed opposite to each other along its axial direction. The clamping member 11 passes through the gripping cylinder 12, and a portion of the clamping member 11 can extend out of the first end 123 of the gripping cylinder 12. The clamping member 11 has a convertible gripping state and a detached state. In the gripping state, the clamping member 11 can clamp the cone-shaped shell 6. In the detached state, the clamping member 11 can detach from the cone-shaped shell 6. The clamping member 11 is movably disposed on the holding cylinder 12 along the axial direction to accommodate the change of the clamping member 11 between the holding and loose states. One of the first positioning channel 125 and the second positioning channel 126 is formed on the clamping member 11, and the other of the first positioning channel 125 and the second positioning channel 126 is formed on the holding cylinder 12, or each of the first positioning channel 125 and the second positioning channel 126 is formed on the holding cylinder 12.

[0074] The implantation device 100 for artificial vertebral body 200 of this invention allows the clamping member 11 of the holder 1 to be movably inserted along the axial direction of the holder cylinder 12, thus enabling it to switch between a holding state and a released state. This provides advantages such as simplified structural design and high ease of operation.

[0075] Optionally, the clamping member 11 is axially movable on the holding cylinder 12, allowing it to reciprocate between a holding state and a released state. This enables the clamping member 11 to switch between the holding and released states, facilitating the reuse of the holder 1. This provides the advantage of reducing the cost of vertebral body implantation.

[0076] like Figures 3 to 6 As shown, the gripper 1 also includes an adjustment part 13, which is fitted to the second end 124 of the gripping cylinder 12. The adjustment part 13 is connected to the clamping member 11 so that the clamping member 11 can be driven to move along the axial direction of the gripping cylinder 12 through the adjustment part 13 (thereby, the clamping member 11 realizes the transition between the gripping state and the detached state).

[0077] The implantation and retrieval device 100 for an artificial vertebral body 200 of this invention, through the cooperation between the adjustment part 13 of the holder 1 and the holder cylinder 12, allows the adjustment part 13 to be located on the outside of the human body during surgery. This provides the advantage of convenient operation. Furthermore, the adjustment part 13 is connected to the clamping member 11 to limit the clamping member 11. This improves the stability of the clamping member 11.

[0078] like Figures 4-9 As shown, the adjusting part 13 is threadedly engaged with the second end 124 of the holding cylinder 12 so that the adjusting part 13 can move along the axial direction of the holding cylinder 12 by rotating the adjusting part 13. The adjusting part 13 is rotatable relative to the clamping member 11 so that the clamping member 11 can be driven to move along the axial direction of the holding cylinder 12 by the adjusting part 13, thereby driving the clamping member 11 to switch between the holding state and the detached state.

[0079] The implantation device 100 for artificial vertebral body 200 of this invention uses an adjusting part 13 that is threadedly engaged with the second end 124 of the holding cylinder 12. When adjusting the adjusting part 13, only the adjusting part 13 needs to be rotated to drive the clamping member 11 to move along the axial direction of the holding cylinder 12. Therefore, it has the advantages of good stability and simple structure.

[0080] Optionally, the adjusting part 13 is fitted onto the second end 124 of the holding cylinder 12, and the internal thread on the adjusting part 13 engages with the external thread on the second end 124 of the holding cylinder 12.

[0081] This application is not limited to this. For example, in some other embodiments, the holding cylinder 12 is disposed outside the adjusting part 13, and the external thread on the adjusting part 13 engages with the internal thread of the second end 124 of the holding cylinder 12.

[0082] like Figures 5 to 10 As shown, the clamping member 11 has either a mating groove or a mating protrusion, and the adjusting part 13 has either a mating groove or a mating protrusion. The mating protrusion is rotatably fitted into the mating groove so that the clamping member 11 can move by the movement of the adjusting part 13. In other words, the clamping member 11 has a mating groove and the adjusting part 13 has a mating protrusion, or the clamping member 11 has a mating protrusion and the adjusting part 13 has a mating groove. It can be understood that the mating protrusion is rotatably fitted into the mating groove, specifically, the mating protrusion is disposed within the mating groove and is rotatable relative to the mating groove.

[0083] The implantation device 100 for holding an artificial vertebral body 200 according to an embodiment of the present invention has a clamping member 11 and an adjusting part 13 that cooperate with each other through a mating protrusion and a mating groove. The adjusting part 13 can drive the clamping member 11 to move axially along the holding cylinder 12, while preventing the clamping member 11 from rotating with the adjusting part 13. Therefore, when the adjusting part 13 drives the clamping member 11 to switch between the holding and releasing states, the angle of the vertebral body shell 6 held by the clamping member 11 in the human body will not change. This further improves the ease of operation.

[0084] like Figure 4 and Figure 9 As shown, the adjusting part 13 or the holding cylinder 12 is provided with an anti-detachment part 131 to prevent the adjusting part 13 from detaching from the holding cylinder 12.

[0085] Optionally, the anti-detachment part 131 can be a mating pin. Specifically, the holding cylinder 12 is sleeved inside the adjusting part 13, and the internal thread on the adjusting part 13 mates with the external thread on the second end 124 of the holding cylinder 12. One end of the pin is connected to the second end 124 of the holding cylinder 12, and the other end of the pin extends radially outward along the holding cylinder 12 to the adjusting part 13, so that the anti-detachment part 131 can prevent the adjusting part 13 from falling off the holding cylinder 12.

[0086] like Figure 2 and Figure 8 As shown, the clamping member 11 includes a clamping part 111 and a driving rod 112 arranged sequentially along the axial direction of the holding cylinder 12. The clamping part 111 can extend out of the first end 123 of the holding cylinder 12, and the clamping part 111 can clamp the cone-shaped housing 6. One end of the driving rod 112 (e.g. Figure 2 and Figure 8The drive rod 112 (as shown) is connected to the clamping part 111, and the other end of the drive rod 112 is connected to the adjusting part 13. It can be understood that the clamping part 111 can cooperate with one end of the holding cylinder 12, and the drive rod 112 extends along the axial direction of the holding cylinder 12.

[0087] The implantation device 100 for holding an artificial vertebral body 200 according to an embodiment of the present invention divides the clamping member 11 into a clamping part 111 and a driving rod 112. By driving the other end of the driving rod 112, the clamping part 111 can clamp the vertebral body shell 6. Thus, it has the advantages of simple structure and further improved ease of operation.

[0088] Specifically, the drive rod 112 is provided with either a mating groove or a mating protrusion, and the adjustment part 13 is provided with either a mating groove or a mating protrusion.

[0089] Optionally, the first positioning channel 125 is formed on the drive rod 112 (that is, the drive rod 112 can be a hollow rod), and the expander 2 passes through the drive rod 112. This has the advantages of saving internal space and improving the compactness of the implantation device 100.

[0090] like Figures 4 to 8 As shown, the holding cylinder 12 includes a main body 121 and a mating part 122 arranged sequentially along the axial direction of the holding cylinder 12. The mating part 122 is connected to the main body 121. The clamping part 111 includes a first clamping part 1111 and a second clamping part 1112. The first clamping part 1111 and the second clamping part 1112 are arranged opposite each other in the radial direction of the holding cylinder 12 (so that when the clamping member 11 moves along the axial direction of the holding cylinder 12, the first clamping part 1111 and the second clamping part 1112 can move closer to or further away from each other). The outer wall surface of each of the first clamping part 1111 and the second clamping part 1112 can abut against the inner wall surface of the mating part 122. The distance between the inner wall surfaces of the mating parts 122 increases along the axial direction of the holding cylinder 12 from the first end 123 to the second end 124.

[0091] The implantation and retrieval device 100 for an artificial vertebral body 200 of this embodiment of the invention uses the spacing between the inner wall surfaces of the mating part 122 along the axial direction of the retrieval cylinder 12 from the first end 123 to the second end 124 (e.g., Figure 1 , Figure 8 and Figure 10 As shown in the diagram, the distance between the first clamping part 1111 and the second clamping part 1112 increases from front to back. Therefore, when the clamping member 11 moves from the first end 123 to the second end 124, the distance between the first clamping part 1111 and the second clamping part 1112 decreases, which allows the clamping member 11 to switch between the holding state and the releasing state. Thus, it has the advantages of simple structure and good structural stability.

[0092] This application is not limited to this. For example, in some other embodiments, the holding cylinder 12 includes a connected main body 121 and a mating part 122, and the clamping part 111 includes a first clamping part 1111 and a second clamping part 1112. The first clamping part 1111 and the second clamping part 1112 are arranged opposite each other radially along the holding cylinder 12. The outer wall surface of each of the first clamping part 1111 and the second clamping part 1112 can abut against the inner wall surface of the mating part 122. The outer wall surface of the clamping part 111 decreases in size along the axial direction of the holding cylinder 12 from the first end 123 to the second end 124. Therefore, when the clamping member 11 moves from the first end 123 to the second end 124, the distance between the first clamping part 1111 and the second clamping part 1112 will be reduced, that is, the clamping member 11 can switch between the holding state and the releasing state. Thus, it has the advantages of simple structure and good structural stability.

[0093] like Figure 8 and Figure 10 As shown, at least one of the first clamping part 1111 and the second clamping part 1112 is an elastic clamping part.

[0094] The implantation device 100 for holding an artificial vertebral body 200 according to an embodiment of the present invention provides an elastic clamping part in at least one of the first clamping part 1111 and the second clamping part 1112. This satisfies a certain clamping force while preventing excessive clamping force on the vertebral body shell 6, thus avoiding the risk of damage to the vertebral body shell 6.

[0095] For example, the first clamping part 1111 and the second clamping part 1112 can be made of materials such as nickel-titanium alloy.

[0096] Optionally, in the detached state, the distance between the first clamping part 1111 and the second clamping part 1112 is greater than the width of the corresponding interface on the cone-shaped housing 6. This provides the advantage of convenient clamping.

[0097] like Figure 8 and Figure 10 As shown, the inner wall surface of the main body 121 and the inner wall surface of the mating part 122 form a step 127 at the connection, and a part of the clamping part 111 abuts against the step 127.

[0098] The implantation device 100 for artificial vertebral body 200 of the present invention forms a step 127 at the connection between the inner wall surface of the main body 121 and the inner wall surface of the mating part 122. A part of the clamping part 111 can abut against the step 127, thereby limiting the clamping part 111 by the step 127, which has the problem of preventing the clamping part 11 from being damaged due to excessive stretching.

[0099] like Figure 1 , Figure 10 , Figure 11 and Figure 13 As shown, the spreader 2 includes a gear portion 21 (optionally, the teeth on the gear portion 21 are helical teeth) and a spreading rod 22. The gear portion 21 is disposed at one end of the spreading rod 22. The gear portion 21 can mesh with the rotating body 8 to drive the rotating body 8 to rotate. The first positioning channel 125 is a hollow cavity formed on the drive rod 112 and extending axially along the holding cylinder 12. The spreader 2 is rotatably inserted into the hollow cavity. The cooperation between the gear portion 21 and the rotating body 8 is prior art and will not be described in detail here.

[0100] The implantation and retrieval device 100 for an artificial vertebral body 200 according to this embodiment of the invention has the advantages of convenient operation and simple structure by setting a gear part 21 and a retrieval rod 22 in the expander 2, and driving the gear part 21 to rotate by the retrieval rod 22. In addition, setting the first positioning channel 125 on the retrieval rod 22 also has the advantages of saving internal space and improving the compactness of the implantation and retrieval device 100.

[0101] This application is not limited thereto. For example, in some other embodiments, the first positioning channel 125 may also be formed on the first spacer (not shown), the first spacer is connected to the holding cylinder 12, and the spreader 2 is rotatably inserted through the first spacer.

[0102] Optionally, the first spacer can be disposed inside the holding cylinder 12 and connected to the inner wall of the cylinder. Alternatively, the first spacer can be disposed outside the holding cylinder 12 and connected to the outer wall of the holding cylinder 12.

[0103] like Figures 15-17 As shown, the vertebral body shell 6 includes a base 64 and an elastic part 61. The base 64 has a notch 641, and the elastic part 61 is cantilevered onto the notch 641. A clearance part 642 is formed on the base 64 to allow the spreader 2 to pass through. A connecting part 63 is provided on the elastic part 61. A second positioning channel 126 is formed on a second spacer connected to the holding cylinder 12. The unlocker 3 is movably inserted into the second spacer along the axial direction of the holding cylinder 12, and one end of the unlocker 3 is connected to the elastic part 61 to drive the connecting part 63 to disengage from the rotating body 8 (the rotating body 8 can rotate clockwise and counterclockwise to realize the artificial vertebral body 200 from the locked state to the unlocked state).

[0104] The implantation and retrieval device 100 for an artificial vertebral body 200 in this embodiment of the invention is formed on a second spacer connected to the retrieval cylinder 12 via a second positioning channel 126. This provides advantages such as ease of manufacturing and simple structure.

[0105] Optionally, the unlocker 3 includes an unlocking lever 31 and an assembly part 32, which can be connected to the elastic part 61 to drive the locking part 62 to disengage from the rotating body 8.

[0106] Specifically, the connecting part 63 is a threaded hole provided on the elastic part 61, and the assembly part 32 is a threaded part, which passes through the threaded hole. Thus, it has the advantages of simple structure and easy processing.

[0107] Optionally, one end of the unlocker 3 can be detachably connected to the elastic part 61, or the two can be interference-fitted.

[0108] like Figures 1 to 5 As shown, the implantation device 100 for holding the artificial vertebral body 200 also includes an operating handle 33, which is connected to the other end of the unlocker 3.

[0109] The implantation device 100 for holding and retrieving an artificial vertebral body 200 in this embodiment of the invention can improve the convenience of rotation operation of the unlocker 3 by setting the operating handle 33.

[0110] Optionally, the operating handle 33 is detachably connected to the other end of the unlocker 3.

[0111] Optionally, such as Figures 1 to 9 As shown, the other end of the unlocker 3 is provided with a flattened section 311, and the operating handle 33 is detachably connected to the flattened section 311 to prevent the unlocker 3 and the operating handle 33 from rotating relative to each other, thereby improving the doctor's grip comfort.

[0112] The spreader 2 also includes a drive handle 23, which is connected to the end of the spreader 2 furthest from the artificial vertebra 200. The drive handle 23 is rotatably engaged with the unlocker 3. This improves the convenience and comfort of operating the spreader 2. Simultaneously, the rotatable engagement of the drive handle 23 and the unlocker 3 ensures no interference between them. It is understood that when adjusting the height of the artificial vertebra 200, the unlocker 3 must remain engaged with the connecting part 63. At this time, the unlocker 3 is always located within the second positioning channel 126. Simultaneously, the spreader 2 needs to be rotated via the drive handle 23 to drive the rotating body 8. By setting the drive handle 23 and the unlocker 3 to rotate, it is ensured that the unlocker 3 does not affect the use of the spreader 2. In this embodiment, the drive handle 23 has a cylindrical structure with an open end and an internal cavity. Both the spreader 2 and the unlocker 3 can pass through the cavity from the open end. The spreader rod 22 of the spreader 2 is fixedly connected to the center of the drive handle 23, and one end of the unlocker 3 is suspended within the cavity. In other embodiments, the drive handle 23 may also have other structures.

[0113] Optionally, such as Figure 3 , Figure 7 and Figure 14As shown, the operating handle 33 includes a handle body 331, a reset member 332, and a pressing member 333. The unlocker 3 is inserted into the handle body 331. The pressing member 333 has a locked state where it is connected to the unlocker 3 to lock the unlocker 3 and the handle body 331, and an unlocked state where it is separated from the unlocker 3 to separate the unlocker 3 and the handle body 331. The reset member 332 can move the pressing member 333 from the unlocked state to the locked state. This improves the convenience of the unlocking state transition process between the unlocker 3 and the handle body 331. It can be understood that when it is necessary to rotate the unlocker 3 to connect the mounting part 32 and the connecting part 63, the pressing member 333 of the operating handle is connected to the unlocker 3, so that the unlocker 3 can be rotated through the handle body 331. After the unlocker 3 has been rotated, the operating handle can be removed from the unlocker 3 to avoid the setting of the operating handle affecting the use of the drive handle 23.

[0114] Specifically, the handle body 331 is provided with an insertion hole 3311 extending axially and a mounting hole 3312 extending radially. The pressing member 333 is provided with a locking part 3331 corresponding to the insertion hole 3311. The reset member 332 and the pressing member 333 are both disposed in the mounting hole. The pressing member 333 can squeeze the reset member 332 along the extending direction of the mounting hole 3312 so that when the pressing member 333 is released, the unlocker 3 extends into the insertion hole 3311 so that the locking part 3331 can engage with the flattened section 311. When the operating handle needs to be installed, press the pressing member 333 so that the engaging part 3331 is located in the insertion hole 3311. Insert the flattened section 311 from the insertion hole 3311 until it reaches the engaging part 3331. At this time, the reset member 332 is in a compressed state. Then release the pressing member 333. Under the action of the reset member 332, the pressing member 333 moves away from the reset member 332, and at the same time drives the engaging part 3331 to move to lock the flattened section 311.

[0115] Specifically, to prevent the pressing element 333 from detaching from the handle body 331, a limiting element can be provided. This limiting element can be a pin or similar structure. The pin slides through the limiting groove of the pressing element 333, with both ends connected to the handle body 331. The pin and limiting groove ensure the movement of the pressing element 333 while preventing it from detaching from the handle body 331. In other embodiments, the limiting element can be other structures.

[0116] like Figures 1 to 5 As shown, the implantation device 100 for artificial vertebral body 200 also includes a secondary bone graft channel 4 and a secondary bone graft rod 5. The secondary bone graft channel 4 can communicate with the vertebral body shell 6, and the secondary bone graft rod 5 can be inserted into the secondary bone graft channel 4 so as to supplement the bone graft material into the vertebral body shell 6 through the secondary bone graft channel 4.

[0117] The implantation device 100 for artificial vertebral body 200 in this embodiment of the invention can replenish bone graft products into the bone graft cavity a second time through the set secondary bone graft channel 4.

[0118] like Figures 1 to 5 As shown, the secondary bone graft channels 4 are arranged side by side on the outside of the holder 1 (specifically, the holder cylinder 12) and are detachably connected to the holder 1 via a connector. This not only improves the ease of processing the secondary bone graft channels 4, but also ensures the ease of operation of the secondary bone graft.

[0119] like Figures 1 to 5 As shown, the secondary bone graft channel 4, at the end furthest from the vertebral body shell 6, has a flared portion 41 that communicates with the secondary bone graft channel. The inner diameter of the flared portion 41 gradually increases in the direction away from the vertebral body shell 6. This increases the convenience of bone graft product implantation.

[0120] Optionally, the inlet end of the secondary bone graft channel 4 can be funnel-shaped. This further increases the convenience of bone graft product implantation.

[0121] Optionally, the inside of the holding cylinder 12 is provided with a third septum through which the spreader 2 passes, and the inner cavity of the third septum defines a secondary bone graft channel 4.

[0122] like Figures 1 to 5 As shown, a clearance platform is provided on the side of the flared portion 41 near the gripper 1. This avoids interference between the flared portion 41 and the gripper 1.

[0123] The system for repairing human vertebrae according to embodiments of the present invention may include an artificial vertebra 200 and a holding and implantation device 100 for the artificial vertebra 200 according to any of the above embodiments. The artificial vertebra 200 includes a vertebral body shell 6, a support member 7, and a rotating body 8. The rotating body 8 is threadedly engaged with the support member 7 and is disposed within the vertebral body shell 6. The artificial vertebra 200 has a locked state. In the locked state, the vertebral body shell 6 includes an elastic part 61 and a locking part 62 disposed on the elastic part 61. The locking part 62 cooperates with the rotating body 8 to restrict the rotating body 8 from rotating in either a clockwise or counterclockwise direction. The elastic part 61 is provided with a connecting part 63. The holder 1 can clamp the vertebral body shell 6. The spreader 2 cooperates with the rotating body 8 to drive the rotating body 8 to rotate. The unlocker 3 can be connected to the elastic part 61 to drive the locking part 62 to disengage from the rotating body 8.

[0124] Therefore, the system for repairing human vertebrae according to the present invention has the advantages of good integration capabilities, saving medical resources and convenient operation.

[0125] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0126] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0127] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0128] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0129] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0130] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A device for holding and implanting an artificial vertebral body, characterized in that, The artificial vertebral body includes a vertebral body shell, a support member, and a rotating body. The rotating body is threadedly engaged with the support member and is disposed within the vertebral body shell. The artificial vertebral body has a locked state. In the locked state, the vertebral body shell includes an elastic portion and a locking portion disposed on the elastic portion. The locking portion engages with the rotating body to restrict the rotating body from rotating clockwise or counterclockwise. The elastic portion is provided with a connecting portion. The implantation holding device includes: A gripper capable of holding the cone-shaped shell, the gripper having a first positioning channel and a second positioning channel; A spreader and a unlocker are provided. The spreader is used to cooperate with the rotating body to drive the rotating body to rotate. The unlocker can be connected to the elastic part to drive the locking part to disengage from the rotating body so that the artificial vertebrae can rotate to the unlocked state. The spreader and the unlocker are respectively installed on the first positioning channel and the second positioning channel. The gripper has a convertible gripping state and a detached state. In the gripping state, the gripper can clamp the cone-shaped housing; in the detached state, the gripper can disengage from the cone-shaped housing. The gripper includes a clamping member, a gripping cylinder, and an adjusting part. The gripping cylinder has a first end and a second end disposed opposite to each other along its axial direction. The clamping member is movably inserted through the gripping cylinder along its axial direction to facilitate the change of the clamping member between the gripping state and the detached state. One of the first positioning channel and the second positioning channel is formed in the clamping member. The first positioning channel and the second positioning channel are formed on the holding cylinder, or each of the first positioning channel and the second positioning channel is formed on the holding cylinder. The adjusting part is fitted to the second end of the holding cylinder. The adjusting part is connected to the clamping member so as to drive the clamping member to move along the axial direction of the holding cylinder. The adjusting part is threadedly fitted to the second end of the holding cylinder. The adjusting part is rotatable relative to the clamping member and can push the clamping member to move along the axial direction of the holding cylinder.

2. The device for holding and implanting an artificial vertebral body according to claim 1, characterized in that, The clamping member is provided with one of a mating groove or a mating protrusion, and the adjusting part is provided with the other of the mating groove or the mating protrusion. The mating protrusion is rotatably fitted into the mating groove so that the clamping member can move by the movement of the adjusting part. And / or, the adjusting part or the holding cylinder is provided with an anti-detachment part to prevent the adjusting part from detaching from the holding cylinder.

3. The device for holding and implanting an artificial vertebral body according to claim 1, characterized in that, The clamping member includes a clamping part and a driving rod arranged sequentially along the axial direction of the holding cylinder. The clamping part can extend out of the first end of the holding cylinder and can clamp the cone-shaped shell. One end of the driving rod is connected to the clamping part, and the other end of the driving rod is connected to the adjusting part.

4. The device for holding and implanting an artificial vertebral body according to claim 3, characterized in that, The holding cylinder includes a main body and a mating part. The clamping part includes a first clamping part and a second clamping part. The first clamping part and the second clamping part are arranged opposite to each other along the radial direction of the holding cylinder. The outer wall surface of each of the first clamping part and the second clamping part can abut against the inner wall surface of the mating part. The distance between the inner wall surfaces of the mating parts increases along the axial direction of the holding cylinder from the first end to the second end. And / or, the outer wall surface of the clamping part decreases in the direction from the first end to the second end along the axial direction of the holding cylinder.

5. The device for holding and implanting an artificial vertebral body according to claim 4, characterized in that, At least one of the first clamping part and the second clamping part is an elastic clamping part; And / or, the inner wall surface of the main body and the inner wall surface of the mating part form a step at the connection, and a portion of the clamping part abuts against the step.

6. The device for holding and implanting an artificial vertebral body according to claim 3, characterized in that, The spreader includes a gear part and a spreader rod. The gear part is disposed at one end of the spreader rod. The gear part can mesh with the rotating body to drive the rotating body to rotate. The first positioning channel is a hollow cavity formed on the drive rod and extending along the axial direction of the holding cylinder. The spreader is rotatably inserted into the hollow cavity. Alternatively, the first positioning channel is a first spacer connected to the holding cylinder, and the spreader is rotatably mounted on the first spacer.

7. The device for holding and implanting an artificial vertebral body according to any one of claims 1-6, characterized in that, The cone-shaped housing includes a base and the elastic part. The base has a notch, and the elastic part cantilevered onto the notch. The base has a clearance portion for allowing the spreader to pass through. The elastic part has a connecting portion. The inside of the holding cylinder has a second spacer through which the spreader passes. The second spacer is connected to the holding cylinder. The unlocker is movably mounted on the second spacer along the axial direction of the holding cylinder, and one end of the unlocker is connected to the connecting portion to drive the locking portion to disengage from the rotating body. And / or, the unlocker includes an unlocking lever and an assembly portion, the assembly portion being connectable to the elastic portion to drive the locking portion to disengage from the rotating body.

8. The device for holding and implanting an artificial vertebral body according to any one of claims 1-6, characterized in that, The unlocker also includes an operating handle, which is detachably connected to the other end of the unlocker. And / or, the spreader further includes a drive handle connected to the end of the spreader away from the artificial vertebra, and the drive handle is rotatably engaged with the unlocker; And / or, it also includes a secondary bone graft channel and a secondary bone graft rod, wherein the secondary bone graft channel is connected to the vertebral body shell, and the secondary bone graft rod is inserted into the secondary bone graft channel so as to supplement the bone graft material into the vertebral body shell through the secondary bone graft channel.

9. The device for holding and implanting an artificial vertebral body according to claim 8, characterized in that, The operating handle includes a handle body, a reset member, and a pressing member. The unlocker is inserted into the handle body. The pressing member has a locked state in which it is connected to the unlocker to lock the unlocker and the handle body, and an unlocked state in which it is separated from the unlocker to separate the unlocker and the handle body. The reset member enables the pressing member to move from the unlocked state to the locked state. And / or, the secondary bone graft channels are arranged side by side on the outside of the holder and are detachably connected to the holder via a connector; And / or, the end of the secondary bone graft channel away from the vertebral body shell is provided with a flared portion communicating with the secondary bone graft channel, and the inner diameter of the flared portion gradually increases in the direction away from the vertebral body shell.

10. The device for holding and implanting an artificial vertebral body according to claim 9, characterized in that, An obstacle avoidance platform is provided on the side of the flared section near the gripper.

11. A system for repairing human vertebrae, characterized in that, include: An artificial vertebral body, comprising a vertebral body shell, a support member, and a rotating body, wherein the rotating body is threadedly engaged with the support member and is disposed within the vertebral body shell; the artificial vertebral body has a locked state; in the locked state, the vertebral body shell includes an elastic portion and a locking portion disposed on the elastic portion; the locking portion engages with the rotating body to restrict the rotating body from rotating clockwise or counterclockwise; the elastic portion is provided with a connecting portion; and The artificial vertebral body holding and implantation device is the artificial vertebral body holding and implantation device according to any one of claims 1-10, wherein the holder is capable of clamping the vertebral body shell, the spreader cooperates with the rotating body to drive the rotating body to rotate, and the unlocker is capable of being connected to the elastic part to drive the locking part to disengage from the rotating body.

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