An individualized adjustable artificial vertebral body

Abstract

The application provides a kind of personalized adjustable artificial vertebral body, belongs to medical instrument technical field, this personalized adjustable artificial vertebral body includes;Endplate adjustable rod;Sliding slot, sliding slot is opened in endplate adjustable rod;External thread, external thread is fixedly connected between the inner wall of both sides of endplate adjustable rod, and external thread is located in sliding slot;Slot, structure personalized design, can be customized according to the needs of different patients, provide better adaptability and clinical effect;With angle adjustment function, through the combination of endplate adjustment rod and external thread, the angle of vertebral body can be adjusted;Length adjustable, through the cooperation of adjusting nut and adjusting screw rod, the individualization adjustment of vertebral body length is realized;High stability, the stability of initial implantation is provided by the structure of sharp and support frame, and the trabecular bone area promotes bone induction and long-term fixed fusion;Simple operation, the use method is clear and easy to understand, and it is convenient for doctors to operate.

Description

Technical Field

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

[0002] An artificial vertebra is a medical device used in spinal surgery, primarily to treat severe spinal conditions such as spinal tumors, spinal tuberculosis, or severe spinal degenerative lesions. The design concept for this artificial vertebra is to customize it based on the patient's specific condition and anatomical structure to achieve optimal biomechanical matching and support.

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

[0004] Inadequate endplate conformity, limited trabecular bone, and a lack of initial stability: Existing artificial vertebrae have certain issues with the conformity of the upper and lower endplates. The endplates do not adhere tightly enough to provide adequate stability and fixation. Furthermore, the limited trabecular bone of existing vertebrae does not meet the requirements of long-term fixation and fusion, and the lack of initial stability compromises the therapeutic effect after implantation. Summary of the Invention

[0005] The purpose of the present invention is to provide a personalized, adjustable artificial vertebral body, aiming to address the problems in the prior art, such as insufficient endplate conformity, a small range of trabeculae, and a lack of an initial stable structure. Existing artificial vertebral bodies have certain problems with the conformity of the upper and lower endplates. The endplates do not conform tightly enough to provide sufficient stability and fixation. In addition, the existing vertebral bodies have a small range of trabeculae, which cannot meet the needs of long-term fixation and fusion, and lack an initial stable structure, which affects the therapeutic 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 chute, the chute being provided in the adjustable rod of the end plate;

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

[0011] a notch, the notch being formed in the external thread;

[0012] an adjusting nut, the adjusting nut being threadedly connected to the circumferential surface of the external thread;

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

[0014] An adjustment mechanism comprising an end plate, a locking bolt, trabeculae, spikes, a gasket, and a core shaft, wherein the gaskets are provided in two groups, the end plate being sleeved on the surface of an adjustable end plate rod, the trabeculae being fixedly connected to the upper end of the adjustable end plate rod, the spikes being located at the upper end of the trabeculae, the core shaft being located in a circular hole, the two gaskets being sleeved on the circumferential surface of the core shaft, and the locking bolt being threadedly connected to the core shaft;

[0015] A movable mechanism, which includes an adjusting screw rotation limit port, a first arc surface and a second arc surface. The adjusting screw rotation limit port and the first arc surface are both opened at the lower end of the end plate, and 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, the lower end of the external thread is provided with a conical surface.

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

[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, providing better adaptability and clinical effects; it has an angle adjustment function, 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 vertebral length can be personalized adjusted 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 implant, 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 facilitates doctors to perform surgical operations.

[0024] 2. The design of the personalized adjustable artificial vertebral body enables precise control of the height and angle of the vertebral body, significantly improving the flexibility and adaptability of the surgery. 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 surgery according to the patient's actual situation to ensure optimal 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 accounts for individual differences. The shape of the endplate can be customized based on the patient's specific anatomy, ensuring maximum surgical effectiveness. The locking and gripping holes on the adjustment nut facilitate operation and improve surgical efficiency. The conical surface at the lower end of the external thread helps minimize damage to surrounding tissue during implantation, increasing surgical safety. These innovative designs not only enhance the functionality and safety of the artificial vertebral body but also greatly facilitate clinical application. 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 A partial enlarged view of the first end plate in the present invention;

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

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

[0031] Figure 5 It is a partial enlarged view of the core shaft 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 This 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] Figure 9 It is a sectional perspective view of the present invention;

[0036] Figure 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 limiter; 13. first arc surface; 14. gasket; 15. core shaft; 16. second arc surface; 17. circular hole; 18. external thread; 19. conical surface; 20. cross slot; 21. anti-rotation boss. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0039] Example 1

[0040] See also Figures 1-10 , 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, external thread 18 is fixedly connected to the lower end of the end plate adjustable rod 1;

[0045] The notch 20 is formed in the external thread 18;

[0046] an adjusting nut 7, the adjusting nut 7 being threadedly connected to the circumferential surface of the external thread 18;

[0047] A circular hole 17 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 core shaft 15. 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. Both gaskets 14 are sleeved on the circumferential surface of the core shaft 15. The locking bolt 3 is threadedly connected to the core shaft 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 can be locked by adjusting the nut 7, or their lengths can be adjusted, with an extension distance of 0-50 mm, so that the upper and lower adjustable endplate rods 1 can be stretched, providing greater flexibility in surgical operations 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 vertebral body, and are personalized according to the patient's body shape to meet user needs. The adjustable endplate rod 1 serves as the core support part of the entire device, 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 is achieved by combining the grooves 20 to facilitate sliding and limit the position of the end plate 2. The adjusting nut 7 is threadedly connected to the external thread 18 to achieve fine adjustment of the position of the end plate 2. The circular hole 17 is used to install the core shaft 15. One side of the core shaft 15 has a threaded hole. In this 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 guide for the sliding of the end plate 2, but also locks 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 extend 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, it can be tightened by rotating the locking bolt 3 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 tissue, and increase biocompatibility. The spikes 5 are located at the upper end of the trabeculae 4 and are used to penetrate the surrounding soft tissue, enhance the initial fixation effect of the artificial vertebral body, and prevent displacement. The adjusting screw rotation limit mouth 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. It is easy to operate 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 individual adjustment. It can extend and adjust a single vertebra to meet the patient's growth and development needs.

[0051] For details, please refer to Figures 1-10 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 a medical-grade metal material such as titanium alloy or stainless steel. The spike 5 is designed to provide additional fixation force by penetrating the surrounding soft tissue and cortical bone during the initial implantation of the artificial vertebral body, preventing the artificial vertebral body from shifting. The spike 5 is embedded in the trabeculae 4 to form an integral structure. This design not only improves the fixation effect of the spike 5, but also ensures a close bond between the spike 5 and the trabeculae 4, enhancing the overall mechanical strength. In the initial implantation of the artificial vertebral body, the spike 5 provides additional fixation force by penetrating the surrounding soft tissue and cortical bone, preventing the artificial vertebral body from shifting. This instant fixation feature is very important for early recovery after surgery, reducing the patient's pain and discomfort and improving the success rate of the operation.

[0053] For details, please refer to Figures 1-10 The circumferential surface of the core shaft 15 is fixedly connected with an anti-rotation boss 21 , and one side end of the end plate 2 is provided with an anti-rotation groove 11 , 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, the main function of which 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 Figures 1-10 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 within the core shaft 15 without generating unnecessary resistance. A cross slot is formed on the top of the locking bolt 3, facilitating operation with tools such as a screwdriver. This cross slot provides better torque transmission, ensuring greater convenience and reliability when tightening or loosening the locking bolt 3.

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

[0058] In this embodiment: The cylindrical structure of the adjusting nut 7 enables it to smoothly cooperate with the external thread 18 during rotation, without 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 at the desired position after adjustment, preventing loosening. The design of the plurality of holding holes 10 provides multiple gripping points, facilitating rotation operation with tools, improving the convenience and accuracy of operation. Only need to tighten the locking screw 8 into the locking hole 9 to achieve locking, which can ensure that the artificial vertebral body maintains the correct position and posture during adjustment, improving the success rate of surgery and the postoperative recovery quality of patients.

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

[0060] In this embodiment: The design purpose of the conical surface 19 is to provide a smooth guide surface when the adjusting nut 7 is rotated in, reducing friction and wear, and ensuring smooth adjustment process.

[0061] For details, please refer to Figures 1-10 The shape of the end plate 2 is designed to be customized according to the specific anatomical structure of the patient, to adapt to different surgical needs.

[0062] In this embodiment: The shape of the end plate 2 is designed to be customized according to the specific anatomical structure of the patient, to adapt to different surgical needs. This personalized design can be realized through 3D printing technology. The shape of the end plate 2 can be three-dimensionally modeled according to the CT or MRI image data of the patient, ensuring that it completely matches the specific anatomical structure of the patient's spine. This personalized design can improve the fit of the artificial vertebral body 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 the holding hole 10 on the adjusting nut 7, rotate the adjusting nut 7 to make the end plate 2 slide up and down along the end plate adjustable rod 1 until it reaches the required height. During the adjustment process, pay attention to the rotation limit port 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, locking 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 and there is no looseness 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, improve the success rate of the operation and the quality of postoperative recovery of the patient.

[0064] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are 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 will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A personalized adjustable artificial vertebral body, characterized by: include: End plate adjustable rod (1); A chute (6), wherein the chute (6) is provided in the end plate adjustable rod (1); An external thread (18), the external thread (18) being 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 the circumferential surface of the external thread (18); A circular hole (17), wherein the circular hole (17) is opened on the surface of the end plate adjustable rod (1); An adjustment mechanism, the adjustment mechanism comprises an end plate (2), a locking bolt (3), a trabecula (4), a spike (5), a liner (14), and a core shaft (15), wherein the liner (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 core shaft (15) is located in the circular hole (17), the two liners (14) are sleeved on the circumferential surface of the core shaft (15), the locking bolt (3) is threadedly connected to the core shaft (15), the circumferential surface of the core shaft (15) is fixedly connected with an anti-rotation boss (21), one side end of the end plate (2) is provided with an anti-rotation slot (11), and the anti-rotation boss (21) is located in the anti-rotation slot (11); 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 provided at the lower end of the end plate (2), the second arc surface (16) is provided at the upper end of the end plate adjustable rod (1), and the second arc surface (16) matches the first arc surface (13); The end plate adjustable rod (1), the sliding groove (6), the external thread (18), the notch (20), the circular hole (17), the adjustment mechanism and the movable mechanism are each provided with two groups, wherein the two external threads (18) are in an upper and lower contact state.

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: The locking bolt (3) is a cylindrical structure, and has an external thread and a cross groove structure, and is used for locking the core shaft (15).

4. The personalized adjustable artificial vertebral body according to claim 3, characterized in that: The adjusting nut (7) is a cylindrical structure. Two locking holes (9) and a plurality of holding holes (10) are provided on the circumferential surface of the adjusting nut (7). Locking screws (8) are respectively threadedly connected in the two locking holes (9).

5. The personalized adjustable artificial vertebral body according to claim 1, characterized in that: The lower end of the external thread (18) is provided with a conical surface (19).

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