Joint prosthesis

Abstract

The present invention provides a joint prosthesis, comprising: a plurality of block structures, the plurality of block structures can be arranged in a ring; a plurality of connection holes, each block structure is provided with at least one connection hole; an elastic connection structure, which is inserted into the plurality of connection holes to connect the plurality of block structures together; and a locking structure, which is arranged between the two ends of the elastic connection structure to lock the two ends of the elastic connection structure together. The technical solution of the present application effectively solves the problem of poor fitting effect of joint prostheses in the related art.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a joint prosthesis. Background Art

[0002] Due to diseases such as osteoarthritis, joint degenerative diseases, joint infections, joint tumors, trauma, rheumatoid arthritis or traumatic arthritis, bone and joint function decline, pain, limited movement, joint deformity or loss of function, surgical prosthesis implantation is currently an effective method for treating such diseases. Joint prostheses include total joint replacement, partial joint replacement and joint capsule repair of prostheses, among which total joint replacement or partial joint replacement are all prosthesis replacements. Total joint replacement includes knee replacement, hip replacement, etc. Partial joint replacement includes total knee replacement, total hip replacement, hemi-hip replacement, total shoulder replacement, total elbow replacement, hemi-shoulder replacement, total ankle replacement, etc. The implantation of joint prostheses can improve the patient's joint function, improve the patient's quality of life, and play an important role in the treatment of joint diseases.

[0003] There are many classification methods for joint prostheses on the market. According to the prosthesis structure: the most commonly used, mature and widespread prosthesis in clinical practice is the bone cement prosthesis, whose main structure is composed of femoral prosthesis, tibial prosthesis, femoral stem, tibial stem, contact surface of the prosthesis stem, etc. The femoral stem and femoral prosthesis, the tibial stem and tibial prosthesis are bonded with bone cement, while the femoral prosthesis and the tibial prosthesis are non-contact. Under normal circumstances, the femoral stem of the femoral prosthesis is non-contact with the femoral prosthesis, while the contact surface of the femoral prosthesis and the tibial prosthesis are in contact, that is, the femoral prosthesis and the tibial prosthesis are non-contact and contact. The prosthesis structure formed in this way has an adverse effect on the patient's functional recovery, resulting in limited recovery of lower limb function.

[0004] After the joint implant is implanted in the human body, if the prosthesis becomes loose, it will affect the bone bonding effect and thus the long-term service life of the prosthesis. Microbial infection such as fungi and bacteria can also cause implant failure.

[0005] Classification by prosthesis components: Currently, the most commonly used prosthesis component in clinical practice is a combined prosthesis, whose main structure is composed of a femoral prosthesis, a tibial prosthesis, a femoral stem, a tibial stem, and a contact surface of the prosthesis stem. The femoral prosthesis is in contact with the femoral stem, while the femoral stem is in contact with the tibial prosthesis. That is, the femoral prosthesis is in contact with the femoral stem, while the femoral stem is in contact with the tibial prosthesis. The prosthesis structure formed in this way has an adverse effect on the functional recovery of the patient, resulting in limited recovery of the lower limb function, especially limited flexion and extension of the lower limb function. Summary of the invention

[0006] The main purpose of the present invention is to provide a joint prosthesis to solve the problem of poor adaptation effect of joint prostheses in the related art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a joint prosthesis is provided, comprising: a plurality of block structures, which can be arranged in a ring shape; a plurality of connecting holes, each block structure being provided with at least one connecting hole; an elastic connecting structure, which is passed through the plurality of connecting holes to connect the plurality of block structures together; and a locking structure, which is arranged between the two ends of the elastic connecting structure to lock the two ends of the elastic connecting structure together.

[0008] Furthermore, the width of the connection hole is greater than the width of the elastic connection structure, and the height of the connection hole is equal to the height of the elastic connection structure.

[0009] Further, the elastic connection structure includes a first side and a second side that are arranged opposite to each other, and a width of the first side is smaller than a width of the second side.

[0010] Furthermore, in the direction from the first side to the second side, the width of the elastic connection structure gradually increases.

[0011] Furthermore, the plurality of connection holes are arranged to form an annular hole, and the inner diameter of the annular hole is equal to the inner diameter of the elastic connection structure.

[0012] Furthermore, the block structure includes a first frame, a second frame and a main body arranged between the first frame and the second frame, and the first frame and the second frame are located at two ends of the main body.

[0013] Furthermore, both the first frame and the second frame are solid structures, and the main body is a trabecular grid structure.

[0014] Further, there is a distance a between the elastic connection structure and the first frame, and there is a distance b between the elastic connection structure and the second frame, and the distance a and the distance b satisfy: 1≤a / b≤1.35.

[0015] Furthermore, a surface layer is provided on the surface of the block structure, and the surface layer includes at least one of calcium ions, phosphorus ions, magnesium ions, manganese ions, molybdenum ions, copper ions, silver ions and zinc ions, and the ion implantation dose of the surface layer is 0.5% to 10%, and the vacuum degree is 10 -4 Pa~10 -3 Pa, the injection voltage is 20 kV ~ 70 kV, the injection pulse width is 300μs ~ 1500μs, the injection pulse frequency is 5 Hz ~ 20Hz, the cathode source trigger pulse width is 300μs ~ 2500μs, and the injection time is 20 minutes ~ 200 minutes.

[0016] Furthermore, the locking structure includes a locking pin and a locking hole, the locking pin is arranged at the first end of the elastic connection structure, the locking hole is arranged at the second end of the elastic connection structure, and the locking pin can be inserted into the locking hole.

[0017] Furthermore, the elastic connection structure includes a connection body and a first protrusion and a second protrusion located at both ends of the connection body, the locking pin is arranged on the first protrusion, and the locking hole is arranged on the second protrusion. When the elastic connection structure is connected, the first protrusion and the second protrusion are overlapped.

[0018] Furthermore, the locking pin includes a first rod segment, a second rod segment and a third rod segment which are arranged in sequence, wherein the diameter of the first rod segment is greater than the diameter of the second rod segment, and the diameter of the third rod segment gradually decreases from the first rod segment to the third rod segment, and a limit block and an elastic member are arranged in the lock hole, and the elastic member pushes the limit block into the lock hole, and when the locking pin is inserted into the lock hole, the limit block is located between the first rod segment and the third rod segment.

[0019] Furthermore, a guide slope is provided on the limit block, and the distance between the guide slope and the elastic member gradually decreases in the direction from the first rod segment to the third rod segment. A accommodating space is provided inside the second protrusion, and the accommodating space is spaced apart from the limit block and is located on the outside of the limit block. The locking structure also includes a first magnetic member, a second magnetic member and an operating member. The first magnetic member is provided on the limit block, and the second magnetic member is provided in the accommodating space. The operating member is connected to the second magnetic member, and the operating member can drive the second magnetic member to rotate. When the first magnetic member and the second magnetic member are attracted or repelled, and the operating member drives the second magnetic member to rotate, the first magnetic member and the second magnetic member switch between attracted and repelled cooperation.

[0020] By applying the technical solution of the present invention, a plurality of block structures are arranged in a ring shape, each block structure is provided with at least one connecting hole, and an elastic connecting structure is inserted into the plurality of connecting holes and connects the plurality of block structures together. A locking structure is arranged at both ends of the elastic connecting structure, and is capable of connecting the two ends of the elastic connecting structure together. Through the above-mentioned arrangement, through the combination of a plurality of block structures and an elastic connecting structure, the adjustability and adaptability of the joint prosthesis are achieved, and fine-tuning can be performed according to the actual situation of the patient, thereby improving the application scope of the prosthesis and the success rate of the operation. The design of the elastic connecting structure enables the joint prosthesis to absorb part of the impact force through elastic deformation when subjected to external force, thereby reducing damage to the surrounding bones and soft tissues. At the same time, the cooperation between the elastic connecting structure and the locking structure ensures the stability and safety of the joint prosthesis. Therefore, the technical solution of the present application effectively solves the problem of poor adaptation effect of the joint prosthesis in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a joint prosthesis according to the present invention is shown;

[0023] Figure 2 Shows Figure 1 A schematic front view of a block structure of a joint prosthesis;

[0024] Figure 3 Shows Figure 1 A cross-sectional schematic diagram of a joint prosthesis;

[0025] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of the block structure and the elastic connection structure of the joint prosthesis;

[0026] Figure 5 Shows Figure 1 A schematic diagram of the three-dimensional structure of the elastic connection structure of the joint prosthesis;

[0027] Figure 6 Shows Figure 5 A partial cross-sectional schematic diagram of an elastic connection structure;

[0028] Figure 7 Shows Figure 6 A local enlarged view of the elastic connection structure at A.

[0029] The above drawings include the following reference numerals:

[0030] 10. Block structure; 11. First frame; 12. Second frame; 13. Main body; 20. Connecting hole; 30. Elastic connecting structure; 31. Connecting body; 32. First protrusion; 33. Second protrusion; 331. Accommodating space; 40. Locking structure; 41. Locking pin; 411. First rod segment; 412. Second rod segment; 413. Third rod segment; 42. Locking hole; 421. Limiting block; 4211. Guide slope; 422. Elastic member; 43. First magnetic member; 44. Second magnetic member; 45. Operating member. DETAILED DESCRIPTION

[0031] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0034] like Figures 1 to 4 As shown, in this embodiment, the joint prosthesis includes: a plurality of block structures 10, a plurality of connection holes 20, an elastic connection structure 30 and a locking structure 40. The plurality of block structures 10 can be arranged in a ring. Each block structure 10 is provided with at least one connection hole 20. The elastic connection structure 30 is inserted into the plurality of connection holes 20 to connect the plurality of block structures 10 together. The locking structure 40 is arranged between the two ends of the elastic connection structure 30 to lock the two ends of the elastic connection structure 30 together.

[0035] The technical solution of the present embodiment is applied, and a plurality of block structures 10 are arranged in a ring shape, and at least one connecting hole 20 is provided on each block structure 10, and an elastic connecting structure 30 is arranged in the plurality of connecting holes 20 and connects the plurality of block structures 10 together. The locking structure 40 is arranged at both ends of the elastic connecting structure 30, and can connect the two ends of the elastic connecting structure 30 together. Through the above-mentioned setting, through the combination of a plurality of block structures 10 and the elastic connecting structure 30, the adjustability and adaptability of the joint prosthesis are realized, and fine-tuning can be performed according to the actual situation of the patient, thereby improving the application scope of the prosthesis and the success rate of the operation. The design of the elastic connecting structure 30 enables the joint prosthesis to absorb part of the impact force through elastic deformation when subjected to external force, thereby reducing the damage to the surrounding bones and soft tissues, and at the same time, the cooperation of the elastic connecting structure 30 and the locking structure 40 ensures the stability and safety of the joint prosthesis. Therefore, the technical solution of the present embodiment effectively solves the problem of poor adaptation effect of the joint prosthesis in the related art.

[0036] Joint prostheses can be fine-tuned during surgery to suit the specific needs of different patients, especially in joint replacement surgery, which can more accurately match the patient's joint anatomy and improve surgical results and patient satisfaction. Through this adjustable design, joint prostheses can adapt to patients with different anatomical structures, which not only improves the personalization of surgery, but also reduces surgical risks.

[0037] like Figures 1 to 4 As shown, in this embodiment, the width of the connection hole 20 is greater than the width of the elastic connection structure 30, and the height of the connection hole 20 is equal to the height of the elastic connection structure 30. Such a design allows the elastic connection structure 30 to expand laterally in the connection hole 20, thereby increasing the stability of the connection, while maintaining a tight connection longitudinally, thereby ensuring the structural strength of the joint prosthesis when bearing loads, and is suitable for joints that require high-strength connections.

[0038] Specifically, the elastic connection structure 30 is allowed to have a certain degree of freedom in the width direction, and can absorb the impact through slight elastic deformation when subjected to external force, reduce damage to surrounding bones and soft tissues, and maintain stability in the height direction to ensure the normal function of the joint prosthesis, which is suitable for joint replacement scenarios that require high stability and a certain buffering effect. The fixity in the height direction ensures the stability of the joint prosthesis when subjected to gravity, while the elastic deformation in the width direction can absorb part of the impact force during daily activities such as walking and running, reduce the damage of the joint prosthesis to surrounding tissues, and improve the patient's comfort and mobility.

[0039] like Figures 3 to 5As shown, in this embodiment, the elastic connection structure 30 includes a first side and a second side that are arranged opposite to each other, and the width of the first side is smaller than the width of the second side. This gradual width design enables the elastic connection structure 30 to disperse stress more evenly when subjected to force, reduce stress concentration, and extend the service life of the prosthesis, which is particularly suitable for the stress distribution requirements of joint prostheses in daily activities.

[0040] like Figures 3 to 5 As shown, in this embodiment, the width of the elastic connection structure 30 gradually increases from the first side to the second side. This design can provide better elastic recovery performance, ensure that the joint prosthesis can quickly return to its original state after being subjected to external force, reduce the patient's discomfort during activities, and is suitable for joint replacements that require high mobility.

[0041] Specifically, this trapezoidal design can improve the strength and stability of the elastic connection structure 30, and at the same time provide a guiding effect during connection, which is convenient for surgical operation and is suitable for parts of joint prostheses that need to bear a large load, such as knee joints, hip joints, etc. The elastic connection structure 30 with a trapezoidal design not only enhances the stability of the connection, but also realizes automatic guidance during the connection process through the width difference between the first side and the second side, reduces the difficulty of surgical operation, improves surgical efficiency, and can provide doctors with greater operational convenience, especially in complex joint replacement surgery.

[0042] like Figures 1 to 5 As shown, in this embodiment, a plurality of connection holes 20 are arranged in a ring-shaped hole, and the inner diameter of the ring-shaped hole is equal to the inner diameter of the elastic connection structure 30. This ring-shaped connection structure can provide 360-degree support, ensuring the stability of the joint prosthesis in all directions, and is suitable for joint replacement surgery requiring all-round support.

[0043] It should be noted that this design ensures uniform distribution of the elastic connection structure 30 in the connection hole 20, improves the overall stability and uniform force of the joint prosthesis, and is suitable for patients who need the joint prosthesis to have high stability and uniform load-bearing capacity, such as patients with a large body weight or who engage in high-load sports. Through the annular hole design, the elastic connection structure 30 can form a uniform force distribution inside the joint prosthesis, and even in patients with a large body weight or during high-intensity sports, it can maintain the stability of the joint prosthesis, reduce the loosening or damage of the prosthesis caused by uneven force, and improve the durability of the prosthesis and the patient's exercise ability.

[0044] like Figures 1 to 4As shown, in this embodiment, the block structure 10 includes a first frame 11, a second frame 12, and a main body 13 disposed between the first frame 11 and the second frame 12, and the first frame 11 and the second frame 12 are located at both ends of the main body 13. This layered design can provide better structural strength and stability, and the design of the main body 13 can better integrate with the surrounding bones, which is suitable for parts that require high strength and good integration in joint replacement surgery.

[0045] Specifically, the design of the main body 13 can better adapt to the physiological structure of the joint, improve the biocompatibility and comfort of the prosthesis, and is suitable for parts that require high biocompatibility and structural strength in joint replacement surgery. The first frame 11 and the second frame 12 provide additional support and enhance the overall structural strength of the joint prosthesis, while the design of the main body 13 can better fit the patient's joint morphology, not only improving biocompatibility, but also ensuring postoperative comfort and recovery of joint function, and is suitable for patients with complex joint morphology who require a highly biocompatible prosthesis.

[0046] like Figures 1 to 4 As shown, in this embodiment, the first frame 11 and the second frame 12 are both solid structures, and the main body 13 is a trabecular grid structure. The first frame 11 and the second frame 12 of the solid structure provide solid support, while the main body 13 of the trabecular grid structure can promote the growth of bone tissue, improve the bonding strength between the prosthesis and the bone, and reduce the risk of prosthesis loosening, which is particularly suitable for joint replacement surgery that requires long-term stability.

[0047] It should be noted that the trabecular mesh structure can simulate the microstructure of human bones, promote the growth and integration of bone tissue, improve the bonding strength between the prosthesis and the bone, and reduce the risk of prosthesis loosening. It is suitable for patients who need to accelerate bone integration and reduce the risk of prosthesis loosening after joint replacement surgery. The first frame 11 and the second frame 12 of the solid structure provide solid edge support to ensure the stability of the joint prosthesis when it is subjected to gravity, while the main body 13 of the trabecular mesh structure can promote bone growth, accelerate the bone integration process, and reduce the risk of secondary surgery caused by prosthesis loosening. It is suitable for patients who need rapid recovery after joint replacement surgery.

[0048] like Figures 1 to 4 As shown, in this embodiment, there is a distance a between the elastic connection structure 30 and the first frame 11, and a distance b between the elastic connection structure 30 and the second frame 12, and the distance a and the distance b satisfy: 1≤a / b≤1.35. This precise distance control can ensure the elastic deformation range of the elastic connection structure 30 when subjected to external force, while maintaining a stable connection with the first frame 11 and the second frame 12, and is suitable for joint replacement surgeries that require precise control of stress distribution, such as ankle replacement.

[0049] Specifically, in this embodiment, a / b=1.1.

[0050] The above-mentioned proportion design ensures the reasonable distribution of the elastic connection structure 30 in the joint prosthesis, which can provide sufficient elastic buffering and maintain the structural stability of the prosthesis, and is suitable for joint replacement surgery scenarios that require a balance between stability and buffering effects. By carefully controlling the ratio of distance a and distance b, the elastic connection structure 30 provides the necessary elastic buffering while not excessively affecting the overall structural stability of the joint prosthesis, ensuring that the joint prosthesis can protect the surrounding tissues while maintaining good function and durability when subjected to impacts in daily activities, and is suitable for joint replacement surgery that requires finding the best balance between stability and buffering.

[0051] In the prior art, if the joint implant becomes loose after being implanted in the human body, it will affect the bone bonding effect and thus the long-term service life of the implant. Microbial infection such as fungi and bacteria may also cause implant failure.

[0052] In order to solve the technical problems above, such as Figures 1 to 4 As shown, in this embodiment, the surface of the block structure 10 is provided with a surface layer, and the surface layer includes at least one of calcium ions, phosphorus ions, magnesium ions, manganese ions, molybdenum ions, copper ions, silver ions and zinc ions, and the ion implantation dose of the surface layer is 0.5% to 10%, and the vacuum degree is 10 -4 Pa~10 -3 Pa, injection voltage is 20kV~70kV, injection pulse width is 300μs~1500μs, injection pulse frequency is 5 Hz~20Hz, cathode source trigger pulse width is 300μs~2500μs, and injection time is 20 minutes~200 minutes. The surface technology of ion implantation can not only improve the biocompatibility of the prosthesis, but also prepare a surface layer containing calcium ions, phosphorus ions, magnesium ions, manganese ions, molybdenum ions, copper ions, silver ions and zinc ions on the surface of the prosthesis by ion implantation, which can improve the bone ingrowth effect and antibacterial ability of the prosthesis, extend the service life of the joint prosthesis, and provide patients with a more lasting and comfortable use experience. It is particularly suitable for joint replacement surgery that requires long-term implantation.

[0053] This ion-implanted surface can not only improve the biocompatibility, bone ingrowth effect and antibacterial properties of joint prostheses, but also enhance the biological function of the surface layer and extend the service life of joint prostheses. It is suitable for patients undergoing joint replacement surgery who need to improve biocompatibility and antibacterial properties while extending the service life. The ion-implanted surface can not only significantly improve the biocompatibility of joint prostheses and promote the combination of bones and prostheses, but also enhance the antibacterial properties of prostheses and reduce the risk of postoperative infection through the introduction of silver ions, copper ions and zinc ions. At the same time, the addition of molybdenum ions and calcium ions improves the biological function of the surface layer and ensures the performance of joint prostheses during long-term use. It is suitable for patients who need to use joint prostheses for a long time, such as the elderly or patients with chronic joint diseases.

[0054] The technical solution of this embodiment adopts ion implantation technology to form a surface layer containing calcium ions, phosphorus ions, magnesium ions, manganese ions, molybdenum ions, copper ions, silver ions and zinc ions on the surface of the prosthesis. The technical solution of this application effectively solves the problem of poor adaptation effect of joint prostheses in related technologies. The contained ions can improve the bone ingrowth effect of the prosthesis, ensure the stability of the prosthesis after implantation, and also improve the antibacterial ability of the prosthesis, which can effectively prevent or inhibit the occurrence of infection.

[0055] like Figures 5 to 7 As shown, in this embodiment, the locking structure 40 includes a locking pin 41 and a locking hole 42, wherein the locking pin 41 is arranged at the first end of the elastic connection structure 30, and the locking hole 42 is arranged at the second end of the elastic connection structure 30, and the locking pin 41 can be inserted into the locking hole 42. The locking structure 40 can ensure the stability of the elastic connection structure 30 after connection, prevent accidental loosening during daily activities, improve the patient's sense of security and use experience, and is suitable for all types of joint replacement surgeries.

[0056] like Figures 5 to 7 As shown, in this embodiment, the locking structure 40 is simple and reliable in design, and can ensure the stable connection of the elastic connection structure 30, which is suitable for surgical scenarios that require fast and reliable connection. The matching design of the locking pin 41 and the locking hole 42 not only simplifies the surgical operation, but also ensures the stable connection of the elastic connection structure 30 through a simple mechanical structure, reducing uncertainties in the surgery, and is suitable for joint replacement scenarios that require fast and efficient surgery, such as emergency surgery or the rapid assembly stage of complex surgery.

[0057] like Figures 5 to 7As shown, in this embodiment, the elastic connection structure 30 includes a connection body 31 and a first protrusion 32 and a second protrusion 33 located at both ends of the connection body 31, a locking pin 41 is arranged on the first protrusion 32, and a locking hole 42 is arranged on the second protrusion 33. When the elastic connection structure 30 is connected, the first protrusion 32 and the second protrusion 33 are overlapped. The overlap design of the first protrusion 32 and the second protrusion 33 can provide additional connection strength, ensure the structural stability of the joint prosthesis when it is subjected to high loads, and is suitable for joint parts that need to withstand high-intensity loads.

[0058] Specifically, the overlap of the first protrusion 32 and the second protrusion 33 increases the reliability of the connection, and at the same time, the overlap of the first protrusion 32 and the second protrusion 33 provides additional stability, which is suitable for joint prosthesis design that requires additional stability and reliable connection. The overlap design of the first protrusion 32 and the second protrusion 33 not only enhances the reliability of the connection, but also provides additional stability through the mutual support between the first protrusion 32 and the second protrusion 33, which can maintain the stability of the joint prosthesis even when the patient performs high-intensity exercise, and is suitable for joint replacement surgery that needs to withstand high loads.

[0059] like Figures 5 to 7 As shown, in this embodiment, the locking pin 41 includes a first rod segment 411, a second rod segment 412 and a third rod segment 413 arranged in sequence, the diameter of the first rod segment 411 is larger than the diameter of the second rod segment 412, and the diameter of the third rod segment 413 gradually decreases in the direction from the first rod segment 411 to the third rod segment 413, and a limiting block 421 and an elastic member 422 are arranged in the locking hole 42, and the elastic member 422 pushes the limiting block 421 to extend into the locking hole 42, and when the locking pin 41 is inserted into the locking hole 42, the limiting block 421 is located between the first rod segment 411 and the third rod segment 413. The matching design of the locking pin 41 and the locking hole 42 can provide a reliable locking effect, and at the same time, through the arrangement of the elastic member 422, the locking structure 40 has a certain buffering effect when subjected to external force, reducing the direct impact on the joint prosthesis. Specifically, the locking structure 40 can automatically lock after the locking pin 41 is inserted into the locking hole 42, providing a simple and effective locking method, which is suitable for surgical operations that require rapid and automatic locking, reducing surgical time and complexity. The automatic locking design of the locking pin 41 and the locking hole 42 greatly simplifies the surgical operation process, reduces the surgical time, and is suitable for emergency surgery or scenes with limited surgical conditions, ensuring the efficiency and safety of the surgery.

[0060] like Figures 5 to 7As shown, in this embodiment, a guiding inclined surface 4211 is provided on the limit block 421, and the distance between the guiding inclined surface 4211 and the elastic member 422 gradually decreases in the direction from the first rod segment 411 to the third rod segment 413, and a receiving space 331 is provided inside the second protrusion 33, and the receiving space 331 is spaced apart from the limit block 421 and is located on the outside of the limit block 421, and the locking structure 40 also includes a first magnetic member 43, a second magnetic member 44 and an operating member 45, the first magnetic member 43 is arranged on the limit block 421, and the second magnetic member 44 is arranged in the receiving space 331, and the operating member 45 is connected to the second magnetic member 44, and the operating member 45 can drive the second magnetic member 44 to rotate, and when the first magnetic member 43 and the second magnetic member 44 are attracted to cooperate or repel each other, and the operating member 45 drives the second magnetic member 44 to rotate, the first magnetic member 43 and the second magnetic member 44 switch between attracting cooperation and repelling cooperation. The magnetic locking structure of the first magnetic part 43 and the second magnetic part 44 not only provides additional locking strength, but also allows easy unlocking through the operating part 45 when needed, which facilitates adjustments during surgery. At the same time, the setting of the first magnetic part 43 and the second magnetic part 44 can reduce metal fatigue and extend the service life of the joint prosthesis. It is suitable for joint replacement surgeries that require frequent fine-tuning, such as elbow and wrist replacements.

[0061] like Figures 5 to 7 As shown, in this embodiment, the adjustability of the locking structure 40 is achieved through the attraction and repulsion of the first magnetic member 43 and the second magnetic member 44, and the locking degree can be adjusted according to the needs during the operation. It is suitable for joint replacement surgery that requires fine adjustment of the locking force, and provides greater flexibility and controllability for the operation. The attraction and repulsion design of the first magnetic member 43 and the second magnetic member 44 enables the doctor to quickly adjust the locking force of the locking structure 40 according to the specific conditions of the patient during the operation, which not only improves the personalization of the operation, but also ensures the recovery of joint function and the comfort of the patient after the operation, and is suitable for joint replacement surgery that requires fine surgical operations.

[0062] Specifically, the operating member is an operating knob. When the operating knob is rotated, the second magnetic member can be driven to rotate. When the first magnetic member 43 and the second magnetic member 44 repel each other, the position of the limit block can be ensured, that is, the limit block can be inserted between the first rod segment and the second rod segment. When the operating knob is rotated again, the second magnetic member can be driven to rotate, so that when the first magnetic member 43 and the second magnetic member 44 attract each other, the resetting force of the elastic member can be overcome, so that the limit block moves in the direction of the second magnetic member, thereby making the limit block away from the lock pin, so that the lock pin can be pulled out.

[0063] The joint prosthesis of this design realizes the adjustability and adaptability of the joint prosthesis through the combination of multiple block structures 10 and elastic connection structures 30, and can be fine-tuned according to the actual situation of the patient, thereby improving the scope of application of the prosthesis and the success rate of the operation. The design of the elastic connection structure 30 enables the joint prosthesis to absorb part of the impact force through elastic deformation when subjected to external force, thereby reducing damage to the surrounding bones and soft tissues. At the same time, the coordination of the elastic connection structure 30 and the locking structure 40 ensures the stability and safety of the joint prosthesis. The main body 13 of the trabecular grid structure can promote the growth of bone tissue, improve the bonding strength between the prosthesis and the bone, and reduce the risk of the prosthesis loosening. The setting of the surface layer can not only improve the biocompatibility of the prosthesis, but also enhance the biological function of the surface layer through ion implantation, prolong the service life of the joint prosthesis, and provide patients with a more lasting and comfortable use experience.

[0064] In addition, this joint prosthesis also has good biomechanical properties, can simulate the movement of natural joints, reduce the discomfort of patients during postoperative recovery, and improve the quality of life. At the same time, it can also improve the bone ingrowth effect and antibacterial ability, and can improve the clinical performance of joint prostheses. In joint replacement surgery, doctors can flexibly adjust the size and shape of joint prostheses according to the specific conditions of the patients, such as the degree of joint wear and bone density, to ensure the best surgical effect. This design also takes into account the convenience of surgical operation and the postoperative rehabilitation needs of patients. It can adapt to the specific conditions of different patients and provide personalized treatment plans. It is an important innovation in the field of joint replacement surgery and is expected to bring good news to more patients. In practical applications, this joint prosthesis can not only significantly improve the success rate of surgery, but also accelerate the patient's recovery process, reduce postoperative complications, and improve the patient's quality of life. Especially in high-load and high-risk joint replacement surgery, the design of this joint prosthesis can significantly improve the safety and success rate of surgery, reduce postoperative complications, and accelerate patient recovery, providing a safer, more reliable and more personalized solution for joint replacement surgery.

[0065] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein are interpreted accordingly.

[0067] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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 joint prosthesis, characterized in that: include: A plurality of block structures (10), wherein the plurality of block structures (10) can be arranged in a ring shape; a plurality of connection holes (20), each of the block structures (10) being provided with at least one of the connection holes (20); An elastic connection structure (30) is inserted into the plurality of connection holes (20) to connect the plurality of block structures (10) together; A locking structure (40) disposed between two ends of the elastic connection structure (30) to lock the two ends of the elastic connection structure (30) together; The width of the connection hole (20) is greater than the width of the elastic connection structure (30), and the height of the connection hole (20) is equal to the height of the elastic connection structure (30); The elastic connection structure (30) comprises a first side and a second side which are arranged opposite to each other, and the width of the first side is smaller than the width of the second side; In the direction from the first side to the second side, the width of the elastic connection structure (30) gradually increases.

2. The joint prosthesis according to claim 1, characterized in that: The plurality of connection holes (20) are arranged to form an annular hole, and the inner diameter of the annular hole is equal to the inner diameter of the elastic connection structure (30).

3. The joint prosthesis according to claim 1, characterized in that: The block structure (10) comprises a first frame (11), a second frame (12), and a main body (13) arranged between the first frame (11) and the second frame (12), wherein the first frame (11) and the second frame (12) are located at two ends of the main body (13).

4. The joint prosthesis according to claim 3, characterized in that: The first frame (11) and the second frame (12) are both solid structures, and the main body (13) is a trabecular grid structure.

5. The joint prosthesis according to claim 3, characterized in that: There is a distance a between the elastic connection structure (30) and the first frame (11), and there is a distance b between the elastic connection structure (30) and the second frame (12), and the distance a and the distance b satisfy the following relationship: 1≤a / b≤1.

35.

6. The joint prosthesis according to any one of claims 1 to 5, characterized in that The surface of the block structure (10) is provided with a surface layer, the surface layer comprising at least one of calcium ions, phosphorus ions, magnesium ions, manganese ions, molybdenum ions, copper ions, silver ions and zinc ions, the ion implantation dose of the surface layer is 0.5% to 10%, and the vacuum degree is 10 -4 Pa~10 -3 Pa, the injection voltage is 20 kV ~ 70 kV, the injection pulse width is 300μs ~ 1500μs, the injection pulse frequency is 5 Hz ~ 20Hz, the cathode source trigger pulse width is 300μs ~ 2500μs, and the injection time is 20 minutes ~ 200 minutes.

7. The joint prosthesis according to any one of claims 1 to 5, characterized in that The locking structure (40) comprises a locking pin (41) and a locking hole (42); the locking pin (41) is arranged at a first end of the elastic connection structure (30); the locking hole (42) is arranged at a second end of the elastic connection structure (30); and the locking pin (41) can be inserted into the locking hole (42).

8. The joint prosthesis according to claim 7, characterized in that: The elastic connection structure (30) comprises a connection body (31) and a first protrusion (32) and a second protrusion (33) located at two ends of the connection body (31); the locking pin (41) is arranged on the first protrusion (32), and the locking hole (42) is arranged on the second protrusion (33); when the elastic connection structure (30) is connected, the first protrusion (32) and the second protrusion (33) are overlapped.

9. The joint prosthesis according to claim 8, characterized in that: The locking pin (41) comprises a first rod segment (411), a second rod segment (412) and a third rod segment (413) which are arranged in sequence; the diameter of the first rod segment (411) is greater than the diameter of the second rod segment (412); the diameter of the third rod segment (413) gradually decreases in a direction from the first rod segment (411) to the third rod segment (413); a limiting block (421) and an elastic member (422) are arranged in the locking hole (42); the elastic member (422) pushes the limiting block (421) to extend into the locking hole (42); when the locking pin (41) is inserted into the locking hole (42), the limiting block (421) is located between the first rod segment (411) and the third rod segment (413).

10. The joint prosthesis according to claim 9, characterized in that: The limit block (421) is provided with a guide slope (4211), and in the direction from the first rod segment (411) to the third rod segment (413), the distance between the guide slope (4211) and the elastic member (422) gradually decreases; the second protrusion (33) is provided with an accommodation space (331) inside, and the accommodation space (331) is spaced apart from the limit block (421) and is located outside the limit block (421); the locking structure (40) further comprises a first magnetic member (43), a second magnetic member (44) and an operating member (45); The first magnetic member (43) is arranged on the limit block (421), the second magnetic member (44) is arranged in the accommodating space (331), the operating member (45) is connected to the second magnetic member (44), and the operating member (45) can drive the second magnetic member (44) to rotate. When the first magnetic member (43) and the second magnetic member (44) are in an attractive fit or a repulsive fit, when the operating member (45) drives the second magnetic member (44) to rotate, the first magnetic member (43) and the second magnetic member (44) switch between the attractive fit and the repulsive fit.

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