Personalized adjustable artificial vertebral body

Abstract

The invention provides a personalized adjustable artificial vertebral body, and belongs to the technical field of medical instruments. An end plate adjustable rod; the sliding groove is formed in the end plate adjustable rod; the external thread is fixedly connected between the inner walls of the two sides of the end plate adjustable rod, and the external thread is located in the sliding groove; the notch and the structure are designed individually, customization can be carried out according to the requirements of different patients, and better adaptability and clinical effects are provided; the angle adjusting function is achieved, and the angle of a vertebral body can be adjusted through combination of an end plate adjusting rod and an external thread; the length can be adjusted, and personalized adjustment of the length of the vertebral body is achieved through cooperation of the adjusting nut and the adjusting screw rod; the stability is high, the stability of initial implantation is provided by a spine and a support frame structure, and bone induction and long-term fixation fusion are promoted in a bone trabecula area; the operation is simple, the use method is clear, and doctors can perform surgical operations conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a personalized adjustable artificial vertebral body. Background Art

[0002] Artificial vertebrae are medical devices used in spinal surgery, which are mainly used to treat serious spinal diseases, such as spinal tumors, spinal tuberculosis or severe spinal degenerative lesions, etc. The design concept of this artificial vertebra is to customize it according to the patient's specific condition and anatomical structure to achieve better biomechanical matching and support effects.

[0003] Although traditional artificial vertebrae can provide different lengths, they cannot be adjusted steplessly. This means that only the preset length can be selected during surgery, and the length cannot be accurately adjusted according to the patient's specific needs, which limits the flexibility and personalization of the surgery.

[0004] The endplates are not close enough, the trabeculae are small, and there is a lack of initial stable structure: the existing artificial vertebrae have certain problems in terms of the degree of fit between the upper and lower endplates. The endplates are not close enough to provide sufficient stability and fixation. In addition, the trabeculae of the existing vertebrae are small, which cannot meet the needs of long-term fixation and fusion, and lack an initial stable structure, which affects the treatment effect after implantation. Summary of the invention

[0005] The purpose of the present invention is to provide a personalized adjustable artificial vertebra, aiming to solve the problems in the prior art that the end plates are not sufficiently fitted, the trabeculae are small in scope, and there is a lack of an initial stable structure: the existing artificial vertebra has certain problems in terms of the fit between the upper and lower end plates. The end plates are not fitted tightly enough to provide sufficient stability and fixation. In addition, the trabeculae of the existing vertebra are small in scope, which cannot meet the needs of long-term fixation and fusion, and there is a lack of an initial stable structure, which affects the treatment effect after implantation.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A personalized adjustable artificial vertebral body, comprising:

[0008] Endplate adjustable rod;

[0009] A slide groove, wherein the slide groove is provided in the adjustable rod of the end plate;

[0010] An external thread, the external thread being fixedly connected to the lower end of the adjustable rod of the end plate;

[0011] A notch, wherein the notch is formed in the external thread;

[0012] An adjusting nut, wherein the adjusting nut is threadedly connected to a circumferential surface of the external thread;

[0013] A circular hole, wherein the circular hole is opened on the surface of the adjustable rod of the end plate;

[0014] The adjustment mechanism comprises an end plate, a locking bolt, a trabecula, a spike, a gasket, and a mandrel, wherein the gasket is provided in two groups, the end plate is sleeved on the surface of an adjustable end plate rod, the trabecula is fixedly connected to the upper end of the adjustable end plate rod, the spike is located at the upper end of the trabecula, the mandrel is located in the circular hole, the two gaskets are sleeved on the circumferential surface of the mandrel, and the locking bolt is threadedly connected in the mandrel;

[0015] A movable mechanism, the movable mechanism includes an adjusting screw rotation limit opening, a first arc surface and a second arc surface, the adjusting screw rotation limit opening and the first arc surface are both opened at the lower end of the end plate, the second arc surface is opened at the upper end of the adjustable rod of the end plate, and the second arc surface matches the first arc surface.

[0016] As a preferred solution of the present invention, the spikes are embedded in the trabeculae to increase the stability in the initial stage of implantation.

[0017] As a preferred solution of the present invention, an anti-rotation boss is fixedly connected to the circumferential surface of the core shaft, an anti-rotation groove is opened at one side end of the end plate, and the anti-rotation boss is located in the anti-rotation groove.

[0018] As a preferred solution of the present invention, the locking bolt is a cylindrical structure with an external thread and a cross groove structure, and is used for locking the core shaft.

[0019] As a preferred solution of the present invention, the adjusting nut is a cylindrical structure, and two locking holes and a plurality of holding holes are provided on the circumferential surface of the adjusting nut, and locking screws are respectively threadedly connected in the two locking holes.

[0020] As a preferred solution of the present invention, a conical surface is formed at the lower end of the external thread.

[0021] As a preferred solution of the present invention, the shape design of the end plate is customized according to the specific anatomical structure of the patient to meet different surgical requirements.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The personalized structural design can be customized according to the needs of different patients to provide better adaptability and clinical effects; it has the function of angle adjustment, and the vertebral angle can be adjusted through the combination of the end plate adjustment rod and the external thread; the length is adjustable, and the personalized adjustment of the vertebral length can be achieved through the cooperation of the adjustment nut and the adjustment screw; it has high stability, the spike and support frame structure provides stability for the initial implantation, and the trabecular area promotes bone induction and long-term fixation and fusion; it is easy to operate, and the usage method is clear and concise, which is convenient for doctors to perform surgical operations.

[0024] 2. The design of the personalized adjustable artificial vertebral body realizes the precise control of the height and angle of the vertebral body, significantly improving the flexibility and adaptability of the operation. Through the use of the adjustable endplate rod and the adjusting nut, the doctor can adjust the height of the artificial vertebral body in real time during the operation according to the actual situation of the patient to ensure the best biomechanical properties. At the same time, the design of the endplate, trabeculae and spikes not only enhances the initial stability of the artificial vertebral body and the surrounding bones, but also promotes bone integration and improves the reliability of long-term fixation. In addition, the anti-rotation design between the core shaft and the endplate further enhances the stability of the artificial vertebral body, effectively avoids the risk of postoperative displacement, and provides a solid guarantee for the patient's recovery.

[0025] 3. The design also fully considers individual differences. The shape of the end plate can be customized according to the patient's specific anatomical structure to ensure the maximum effect of the surgery. The locking hole and holding hole design on the adjustment nut are easy to operate and improve the efficiency of the surgery; and the conical surface design at the lower end of the external thread helps to reduce damage to surrounding tissues during implantation and increase the safety of the surgery. These innovative designs not only improve the functionality and safety of the artificial vertebra, but also bring great convenience to clinical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 It is a partial enlarged view of the first end plate in the present invention;

[0029] Figure 3 It is a partial enlarged view of the second end plate in the present invention;

[0030] Figure 4 It is a partial enlarged view of the liner in the present invention;

[0031] Figure 5 It is a partial enlarged view of the mandrel in the present invention;

[0032] Figure 6 It is a partial enlarged view of the adjustable rod of the end plate in the present invention;

[0033] Figure 7 It is a partial enlarged view of the adjusting nut in the present invention;

[0034] Figure 8 It is a partial enlarged view of the external thread in the present invention;

[0035] Fig. 9 It is a sectional stereogram in the present invention;

[0036] Fig.10 It is a partial enlarged view of the anti-rotation boss in the present invention.

[0037] In the figure: 1. adjustable end plate rod; 2. end plate; 3. locking bolt; 4. trabeculae; 5. spikes; 6. slide groove; 7. adjusting nut; 8. locking screw; 9. locking hole; 10. holding hole; 11. anti-rotation slot; 12. adjusting screw rotation limit opening; 13. first arc surface; 14. gasket; 15. core shaft; 16. second arc surface; 17. round hole; 18. external thread; 19. conical surface; 20. cross groove; 21. anti-rotation boss. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] See also Figure 1-Figure 10 , the present invention provides the following technical solutions:

[0041] A personalized adjustable artificial vertebral body, comprising:

[0042] End plate adjustable rod 1;

[0043] A chute 6 is provided in the end plate adjustable rod 1;

[0044] External thread 18, the external thread 18 is fixedly connected to the lower end of the end plate adjustable rod 1;

[0045] A notch 20 is provided in the external thread 18;

[0046] An adjusting nut 7, wherein the adjusting nut 7 is threadedly connected to the circumferential surface of the external thread 18;

[0047] A circular hole 17, which is provided on the surface of the end plate adjustable rod 1;

[0048] The adjustment mechanism includes an end plate 2, a locking bolt 3, a trabecula 4, a spike 5, a gasket 14, and a mandrel 15, wherein the gasket 14 is provided with two groups, the end plate 2 is sleeved on the surface of the end plate adjustable rod 1, the trabecula 4 is fixedly connected to the upper end of the end plate adjustable rod 1, the spike 5 is located at the upper end of the trabecula 4, the mandrel 15 is located in the circular hole 17, the two gaskets 14 are sleeved on the circumferential surface of the mandrel 15, and the locking bolt 3 is threadedly connected in the mandrel 15;

[0049] The movable mechanism includes an adjusting screw rotation limit opening 12, a first arc surface 13 and a second arc surface 16. The adjusting screw rotation limit opening 12 and the first arc surface 13 are both opened at the lower end of the end plate 2, and the second arc surface 16 is opened at the upper end of the end plate adjustable rod 1, and the second arc surface 16 matches the first arc surface 13.

[0050] In a specific embodiment of the present invention, the device includes two groups of adjustable endplate rods 1, slide grooves 6, external threads 18, notches 20, circular holes 17, adjustment mechanisms and movable mechanisms, wherein the two threads 18 are in an upper and lower contact state, and the two threads can be locked by adjusting the nut 7, and the length of the two threads can also be adjusted, and the extension distance is 0-50mm, so that the upper and lower adjustable endplate rods 1 can be extended, providing greater surgical operation flexibility and personalized adjustment capabilities, and can extend and adjust a single vertebra to meet the growth and development needs of patients. The trabecular area, spikes and support frame in the vertebral structure provide initial stability, promote bone induction and long-term fixation and fusion, enhance the stability and durability of the vertebra, and perform personalized design according to the patient's body shape to meet user needs. The adjustable endplate rod 1 serves as the core supporting part of the entire device, and the slide groove 6 is used to accommodate the external thread 18, and the external thread 18 is used to match the adjusting nut 7. The height adjustment can be achieved by combining the groove 20 to facilitate sliding and limit the position of the end plate 2. The adjusting nut 7 can achieve fine adjustment of the position of the end plate 2 by threaded connection with the external thread 18. The circular hole 17 is used to install the core shaft 15, and one side of the core shaft 15 has a threaded hole. In the device, the end plate 2, locking bolt 3, trabecula 4, spike 5, adjustment mechanism and movable mechanism and other parts are provided with two groups, which are symmetrically designed. The end plate 2 is sleeved on the outer surface of the end plate adjustable rod 1, and the core shaft 15 is inserted into the circular hole 17. The core shaft 15 not only provides a guiding effect for the sliding of the end plate 2, but also realizes the locking of the position of the end plate 2 through the locking bolt 3. There are two groups of gaskets 14, each group of gaskets 14 is sleeved on the circumferential surface of the core shaft 15. The function of the gasket 14 is to reduce the friction between the end plate 2 and the core shaft 15 and prolong the service life of the device. The locking bolt 3 is threadedly connected to the threaded hole inside the core shaft 15 to lock the position of the end plate 2. When the position of the end plate 2 needs to be fixed, the locking bolt 3 can be rotated to tighten it to prevent the end plate 2 from sliding. The trabeculae 4 are fixedly connected to the upper end of the end plate adjustable rod 1. Its design purpose is to imitate the trabecular structure of natural bones, promote the fusion of artificial vertebral bodies with surrounding bone tissues, and increase biocompatibility. The spikes 5 are located at the upper end of the trabeculae 4 and are used to penetrate the surrounding soft tissues, enhance the initial fixation effect of the artificial vertebral bodies, and prevent displacement. The adjusting screw rotation limit opening 12 is used to limit the rotation angle of the adjusting nut 7 to prevent structural damage or position misalignment caused by excessive rotation. The first arc surface 13 matches the second arc surface 16 on the end plate adjustable rod 1.The design of these two arc surfaces ensures that the end plate 2 remains stable during the sliding process and avoids unnecessary lateral movement. The second arc surface 16 matches the first arc surface 13. This design enables the end plate 2 to maintain a good fit with the end plate adjustable rod 1 when sliding, thereby improving the stability of the overall structure. The operation is simple and the usage method is clear and concise, which is convenient for doctors to perform surgical operations. The end plate 2 has an angle adjustment function with an adjustment range of 0-60°, that is, the hinge structure can rotate 30° left and right, and has the ability of subsequent individualized adjustment. It can extend and adjust a single vertebra to meet the patient's growth and development needs.

[0051] For details, please refer to Figure 1-Figure 10 The spikes 5 are embedded in the trabeculae 4 to increase the stability in the initial stage of implantation.

[0052] In this embodiment: the spike 5 is a sharp protrusion structure, usually made of medical grade metal material, such as titanium alloy or stainless steel. The purpose of the spike 5 is to provide additional fixing force to prevent the displacement of the artificial vertebra by penetrating the surrounding soft tissue and cortical bone in the early stage of artificial vertebral implantation. The spike 5 is embedded in the trabeculae 4 to form an integral structure. This design not only improves the fixing effect of the spike 5, but also ensures the close combination between the spike 5 and the trabeculae 4, and enhances the overall mechanical strength. In the early stage of artificial vertebral implantation, the spike 5 provides additional fixing force to prevent the displacement of the artificial vertebra by penetrating the surrounding soft tissue and cortical bone. This instant fixation feature is very important for early recovery after surgery, which can reduce the pain and discomfort of patients and improve the success rate of surgery.

[0053] For details, please refer to Figure 1-Figure 10 An anti-rotation boss 21 is fixedly connected to the circumferential surface of the core shaft 15 , an anti-rotation groove 11 is opened at one side end of the end plate 2 , and the anti-rotation boss 21 is located in the anti-rotation groove 11 .

[0054] In this embodiment, the anti-rotation boss 21 is a protruding structure, and its main function is to prevent the core shaft 15 from rotating after being locked. When the anti-rotation boss 21 enters the anti-rotation slot 11, the core shaft 15 cannot rotate, thereby improving the overall stability of the device.

[0055] For details, please refer to Figure 1-Figure 10 The locking bolt 3 is a cylindrical structure with a thread and a cross groove structure, and is used to lock the core shaft 15.

[0056] In this embodiment, the main body of the locking bolt 3 is a cylindrical structure. This design allows the locking bolt 3 to rotate smoothly inside the mandrel 15 without generating unnecessary resistance. The top of the locking bolt 3 has a cross groove structure, which is convenient for operation with tools such as a screwdriver. The cross groove structure provides better torque transmission, ensuring that tightening or loosening the locking bolt 3 is more convenient and reliable.

[0057] For details, please refer to Figure 1-Figure 10 The adjusting nut 7 is a cylindrical structure, and two locking holes 9 and a plurality of holding holes 10 are provided on the circumferential surface of the adjusting nut 7, and locking screws 8 are respectively threadedly connected in the two locking holes 9.

[0058] In this embodiment: the cylindrical structure of the adjusting nut 7 enables it to cooperate smoothly with the external thread 18 during the rotation process without generating unnecessary resistance. The design of the two locking holes 9 provides a double locking mechanism, ensuring that the adjusting nut 7 can be firmly fixed in the desired position after the adjustment is completed to prevent loosening. The design of the multiple holding holes 10 provides multiple gripping points, which is convenient for using tools for rotation operations, thereby improving the convenience and accuracy of the operation. Locking can be achieved by simply tightening the locking screw 8 into the locking hole 9, thereby ensuring that the artificial vertebra maintains the correct position and posture during the adjustment process, thereby improving the success rate of the operation and the quality of postoperative recovery of the patient.

[0059] For details, please refer to Figure 1-Figure 10 The lower end of the external thread 18 is provided with a conical surface 19 .

[0060] In this embodiment, the conical surface 19 is designed to provide a smooth guiding surface when the adjusting nut 7 is screwed in, thereby reducing friction and wear and ensuring a smooth adjustment process.

[0061] For details, please refer to Figure 1-Figure 10 The shape design of the end plate 2 is customized according to the patient's specific anatomical structure to meet different surgical needs.

[0062] In this embodiment, the shape design of the end plate 2 is customized according to the specific anatomical structure of the patient to meet different surgical needs. This personalized design can be achieved through 3D printing technology. The shape of the end plate 2 can be three-dimensionally modeled according to the patient's CT or MRI imaging data to ensure that it fully matches the specific anatomical structure of the patient's spine. This personalized design can improve the fit of the artificial vertebra and reduce postoperative complications.

[0063] The working principle and usage process of the present invention are as follows: fix the end plate adjustable rod 1 to the surgical site to ensure its accurate position, sleeve the personalized designed end plate 2 on the outer surface of the end plate adjustable rod 1, use a tool to insert into the holding hole 10 on the adjusting nut 7, rotate the adjusting nut 7, and make the end plate 2 slide up and down along the end plate adjustable rod 1 until the required height is reached. During the adjustment process, pay attention to the rotation limit opening 12 of the adjusting screw to ensure that the adjusting nut 7 does not exceed the set rotation angle. After reaching the ideal position, use a screwdriver to tighten the two locking screws 8 to firmly fix it in the locking hole 9. Tightening the locking screw 8 will compress the adjusting nut 7 to prevent it from loosening, ensuring the stable position of the end plate 2. Use a tool to rotate the locking bolt 3 to tighten it in the core shaft 15, lock the position of the end plate 2 to prevent sliding. During the operation, the doctor needs to carefully check the position and fixation of the end plate 2 to ensure that it fits well with the surrounding bone tissue without loosening or displacement. After the operation, regular imaging examinations are performed to monitor the growth of new bone tissue to ensure the stable combination of the artificial vertebral body and the surrounding bone tissue. The personalized adjustable artificial vertebral body can achieve precise height adjustment and stable fixation during surgery to adapt to the anatomical structure needs of different patients, thereby improving the success rate of the operation and the quality of postoperative recovery of the patient.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A personalized adjustable artificial vertebral body, characterized by: include: End plate adjustable rod (1); A slide groove (6), wherein the slide groove (6) is provided in the end plate adjustable rod (1); An external thread (18), wherein the external thread (18) is fixedly connected to the lower end of the end plate adjustable rod (1); A notch (20), wherein the notch (20) is formed in the external thread (18); An adjusting nut (7), wherein the adjusting nut (7) is threadedly connected to a circumferential surface of the external thread (18); A circular hole (17), wherein the circular hole (17) is formed on the surface of the end plate adjustable rod (1); An adjustment mechanism, the adjustment mechanism comprising an end plate (2), a locking bolt (3), a trabecula (4), a spike (5), a gasket (14), and a core shaft (15), wherein the gasket (14) is provided in two groups, the end plate (2) is sleeved on the surface of the end plate adjustable rod (1), the trabecula (4) is fixedly connected to the upper end of the end plate adjustable rod (1), the spike (5) is located at the upper end of the trabecula (4), the core shaft (15) is located in the circular hole (17), the two gaskets (14) are sleeved on the circumferential surface of the core shaft (15), and the locking bolt (3) is threadedly connected to the core shaft (15); A movable mechanism, the movable mechanism comprising an adjusting screw rotation limit opening (12), a first arc surface (13) and a second arc surface (16), the adjusting screw rotation limit opening (12) and the first arc surface (13) are both arranged at the lower end of the end plate (2), the second arc surface (16) is arranged at the upper end of the end plate adjustable rod (1), and the second arc surface (16) matches the first arc surface (13).

2. The personalized adjustable artificial vertebral body according to claim 1, characterized in that: The spikes (5) are embedded in the trabeculae (4) to increase stability in the initial stage of implantation.

3. The personalized adjustable artificial vertebral body according to claim 2, characterized in that: An anti-rotation boss (21) is fixedly connected to the circumferential surface of the core shaft (15), an anti-rotation groove (11) is provided at one side end of the end plate (2), and the anti-rotation boss (21) is located in the anti-rotation groove (11).

4. The personalized adjustable artificial vertebral body according to claim 3, characterized in that: The locking bolt (3) is a cylindrical structure with an external thread and a cross groove structure, and is used for locking the core shaft (15).

5. The personalized adjustable artificial vertebral body according to claim 4, characterized in that: The adjusting nut (7) is a cylindrical structure, and two locking holes (9) and a plurality of holding holes (10) are provided on the circumferential surface of the adjusting nut (7), and locking screws (8) are respectively threadedly connected in the two locking holes (9).

6. The personalized adjustable artificial vertebral body according to claim 5, characterized in that: The lower end of the external thread (18) is provided with a conical surface (19).

7. The personalized adjustable artificial vertebral body according to claim 6, characterized in that: The shape design of the end plate (2) is individually customized according to the patient's specific anatomical structure to adapt to different surgical requirements.

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