Bionic artificial temporomandibular joint replacement prosthesis

Abstract

The invention relates to the technical field of medical treatment, in particular to a bionic artificial temporomandibular joint replacement prosthesis which comprises a glenoid fossa prosthesis and a mandibular branch prosthesis, the bottom of the glenoid fossa prosthesis is provided with a glenoid fossa lining plate, and the glenoid fossa lining plate is of a semi-elliptic structure; two transverse telescopic sleeves and a plurality of circumferential telescopic assemblies are arranged in the glenoid fossa lining disc; a spherical nest is connected between the two transverse telescopic sleeves, a condyle process ball is arranged at the top of the mandibular branch prosthesis and movably connected into the spherical nest, and the problems that in the prior art, a bionic artificial temporomandibular joint replacement prosthesis is prone to being abraded, a large number of chippings are generated, local infection and inflammation are caused, transplantation fails, and the prosthesis is prone to being damaged are solved. The problems that in the prior art, existing joints are difficult to move, limitation is large, the conditions of model selection difficulty and insufficient adaptability are prone to occurring, popularization is not convenient, effective movement of the joints cannot be guaranteed, and the movement effect needs to be enhanced are solved.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and particularly to a bionic artificial temporomandibular joint replacement prosthesis. Background Art

[0002] With the improvement of oral health awareness, the artificial temporomandibular joint prosthesis replacement technology has gradually received attention. Currently, the mainstream artificial temporomandibular joint prostheses at home and abroad include the standard prosthesis of Biomet Company in the United States and the personalized prosthesis customized by TMJ Concepts Company in the United States. However, there are still some bottlenecks in the application of these prostheses, such as high costs, indication limitations, and high technical thresholds. In addition, the problem that foreign products do not match the anatomical structure of Chinese people also leads to an increase in the complexity of the surgery and postoperative discomfort.

[0003] To solve the above problems, domestic research teams have begun to independently develop artificial temporomandibular joint prostheses suitable for Chinese patients. For example, the research team of the Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine established an anatomical database through CT and MRI data, and optimized the prosthesis design by combining finite element analysis. They successfully developed a prosthesis suitable for Chinese people and have entered the clinical trial stage. In addition, other research teams are also exploring the use of 3D printing technology and tissue engineering technology to manufacture condylar prostheses with bionic characteristics.

[0004] The replacement of the artificial temporomandibular joint prosthesis has the advantages of less trauma, fast recovery, and the ability to correct mandibular deformities at the same time. Through the application of digital surgical design and 3D printing technology, the accuracy and success rate of the surgery can be further improved. In the future, with the popularization of domestic prostheses and the popularization of technology, the artificial temporomandibular joint replacement technology is expected to be applied in more oral medical units.

[0005] Chinese Patent No. CN108720969B discloses a bionic artificial temporomandibular joint replacement prosthesis. This bionic artificial temporomandibular joint replacement prosthesis can achieve the ingrowth and attachment of the lateral pterygoid muscle, thereby increasing the range of motion of the artificial joint, avoiding the disadvantages of limited movement of a pure mechanical joint and increasing the burden on the healthy joint on the contralateral side. The hydroxyapatite spraying on the bone contact surface of the glenoid fossa prosthesis and the porous titanium structure on the bone contact surface of the mandibular prosthesis both increase the bonding ability between the prosthesis and the bone, preventing aseptic necrosis of the bone caused by prosthesis micromotion, thereby improving its use effect and lifespan.

[0006] Such existing bionic artificial temporomandibular joint replacement prostheses as mentioned above may cause osteolysis or wear during actual use, and their wear resistance is insufficient, resulting in prosthesis failure or complications, such as loosening of titanium screws and facial nerve injury, etc. Moreover, standardized artificial temporomandibular joint prostheses are expensive, which limits their wide application and popularization. Foreign products do not match the anatomical structure of domestic people, resulting in complicated surgery, increased risks, and strong postoperative discomfort. Although there is a trend of personalized design, there are still problems of difficulty in selection and insufficient adaptability. The applicability is generally not high, resulting in poor use effect. Furthermore, complications such as condylar prosthesis dislocation, loosening of titanium screws, facial nerve injury, parotid gland injury, infection in the surgical area, facial numbness, pain and repeated swelling may occur after artificial temporomandibular joint replacement. Artificial temporomandibular joint replacement not only involves joint reconstruction, but also involves the correction of occlusal relationship and maxillofacial deformity, which requires surgeons to have high clinical and theoretical skills, insufficient adaptability, and no flexible activity space, so that the activity effect needs to be strengthened. Summary of the invention

[0007] The purpose of the present invention is to provide a bionic artificial temporomandibular joint replacement prosthesis, which overcomes the problems in the prior art that the bionic artificial temporomandibular joint replacement prosthesis is prone to wear and tear and produces a large amount of debris, causing local infection and inflammation, leading to transplantation failure, and has relatively large limitations, is prone to difficulties in selection and lack of adaptability, is not easy to promote and popularize, and cannot guarantee the effective movement of the joint, resulting in the problem that the activity effect needs to be strengthened.

[0008] In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problem is: A bionic artificial temporomandibular joint replacement prosthesis is designed. A fossa lining is set between the fossa prosthesis and the mandibular ramus prosthesis. The use of more wear-resistant materials can effectively alleviate the risks caused by wear and improve the activity effect of the joint. At the same time, the lateral telescopic sleeve and circumferential telescopic components in the fossa lining can further ensure the flexibility of joint activity, reduce its limitations, and eliminate postoperative discomfort as much as possible, so that it is very convenient to use and very safe and reliable. The specific plan is as follows: A bionic artificial temporomandibular joint replacement prosthesis, comprising a glenoid prosthesis and a mandibular ramus prosthesis, wherein a glenoid lining plate is arranged at the bottom of the glenoid prosthesis, the glenoid lining plate is in a semi-elliptical structure, and two transverse telescopic sleeves and a plurality of circumferential telescopic components are arranged inside the glenoid lining plate; A spherical socket is connected between the two transverse telescopic sleeves, a condylar sphere is arranged on the top of the mandibular ramus prosthesis, and the condylar sphere is movably connected in the spherical socket.

[0009] Preferably, the glenoid cavity prosthesis is composed of an extension plate and a fixed wing plate which are perpendicular to each other, and the fixed wing plate is arranged on the rear side of the extension plate; A joint fossa recess is provided at the bottom of the extension plate, the joint fossa lining disc is embedded in the joint fossa recess, and a plurality of first fixing holes are penetrated through the fixing wing plate.

[0010] Preferably, the extension plate and the fixing wing plate are an integrally formed structure by 3D printing, and the joint fossa recess is an ellipsoidal arc surface.

[0011] Preferably, the mandibular ramus prosthesis is composed of a condylar neck at the upper end and a mandibular ramus retention handle at the lower end, the condylar sphere is fixedly connected to the top of the condylar neck, and a plurality of second fixing holes are penetrated through the mandibular ramus retention handle.

[0012] Preferably, an installation activity groove is provided at the bottom of the joint fossa lining disc, two transverse telescopic sleeves are oppositely connected to the left and right sides inside the installation activity groove, the spherical socket is located in the middle of the installation activity groove and is connected between the two transverse telescopic sleeves, and the condylar sphere is spherically connected in the spherical socket; An arc-shaped buffer space is provided outside the installation activity groove, a plurality of circumferential telescopic components are arranged at equal intervals in the arc-shaped buffer space, and the circumferential telescopic components are perpendicular to the arc surface of the arc-shaped buffer space.

[0013] Preferably, the circumferential telescopic component includes a liquid storage base, a telescopic column, a spherical liquid sac, a spring telescopic sleeve rod, a conical head, a first spring, a first telescopic sleeve and a second telescopic sleeve; The liquid storage base is connected to the inner bottom of the arc-shaped buffer space, the telescopic column is slidably connected to the upper end of the liquid storage base, the spherical liquid sac is arranged at the top of the telescopic column, the spherical liquid sac is connected to the inner top of the arc-shaped buffer space, a liquid channel is penetrated through the center position of the telescopic column, and the upper end of the liquid channel communicates with the spherical liquid sac; A conical groove is provided at the bottom of the telescopic column, the conical groove communicates with the lower end of the liquid channel, the spring telescopic sleeve rod is vertically connected to the center position inside the liquid storage base, the conical head is connected to the upper end of the spring telescopic sleeve rod and is connected in the telescopic groove through a fixing rod, the conical head corresponds to the conical groove, and a liquid flow gap is formed between the conical head and the conical tooth; The first spring is sleeved on the spring telescopic sleeve rod, the first spring abuts against the bottom of the telescopic column, the second telescopic sleeve is vertically connected in the spherical liquid sac and is butted against the upper end of the liquid channel; A telescopic groove is provided in the second telescopic sleeve, the first telescopic sleeve is slidably connected in the telescopic groove, a plurality of second springs are annularly arranged at the bottom of the first telescopic sleeve, a plurality of connecting rods are annularly arranged at the top of the first telescopic sleeve, and the upper ends of the plurality of connecting rods are connected to the inner top side of the spherical liquid sac.

[0014] Preferably, the spherical socket is made of ultra-high molecular weight polyethylene, and the condylar sphere is made of cobalt-chromium-molybdenum alloy.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention provides a joint socket liner between the joint socket prosthesis and the mandibular ramus prosthesis, which can make the cooperation between the two more biomimetic to the human body structure. On the premise of reducing wear, it can also ensure that they can move more smoothly, providing good use effects and experiences for users.

[0016] 2. The present invention includes a transverse telescopic sleeve and a circumferential telescopic component in the joint socket liner. With the cooperation of the two, the movement of the joint can be further ensured. At the same time, it can effectively avoid risks such as infection and inflammation caused by mutual friction and wear during joint movement, further enhancing the movement effect of the condylar part, and thus ensuring long-term stability and compatibility.

[0017] 3. The present invention can also ensure its adaptability as much as possible through the special structural design of the joint socket liner and the application of new materials, reducing its manufacturing cost, enabling the replacement prosthesis to be widely applied and popularized, ensuring that more patients can benefit, and improving the stability and durability of the prosthesis.

[0018] 4. Through 3D printing technology and tissue engineering technology, the present invention designs and manufactures a biological condylar prosthesis with a bone-cartilage structure and the function of attaching the lateral pterygoid muscle, realizing the transformation from a mechanical joint to a biological joint, and making the joint movement range closer to normal. In addition, the design of personalized prostheses can better adapt to the anatomical characteristics of patients, reducing surgical risks and traumas. Using digital design and 3D printing technology, the precise manufacturing of personalized prostheses can be achieved, reducing errors during surgery and improving the safety and success rate of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a biomimetic artificial temporomandibular joint replacement prosthesis of the present invention; Figure 2 It is a schematic diagram of the structure of the joint socket prosthesis in a biomimetic artificial temporomandibular joint replacement prosthesis of the present invention; Figure 3 It is a schematic diagram of the installation of the joint socket liner in a biomimetic artificial temporomandibular joint replacement prosthesis of the present invention; Figure 4 It is a schematic diagram of the structure of the mandibular ramus prosthesis in a biomimetic artificial temporomandibular joint replacement prosthesis of the present invention; Figure 5 It is a schematic diagram of the structure of the joint socket liner in a biomimetic artificial temporomandibular joint replacement prosthesis of the present invention; Figure 6 This is the bottom view of the fossa lining disc in a bionic artificial temporomandibular joint replacement prosthesis of the present invention; Figure 7 It is Figure 6 The schematic cross-sectional view at A-A in; Figure 8 This is the side view of the circumferential telescopic component in a bionic artificial temporomandibular joint replacement prosthesis of the present invention; Figure 9 It is Figure 8 The schematic cross-sectional view at B-B in; Figure 10 It is Figure 9 The partial enlarged schematic view at C in;

[0020] In the figure: 1 - fossa prosthesis; 11 - extension plate; 111 - fossa depression; 12 - fixed wing plate; 121 - first fixing hole; 2 - mandibular ramus prosthesis; 21 - condylar neck; 22 - mandibular ramus retention handle; 23 - second fixing hole; 3 - fossa lining disc; 31 - installation movable groove; 32 - transverse telescopic sleeve; 33 - spherical fossa; 34 - arc-shaped buffer space; 35 - circumferential telescopic component; 351 - liquid storage base; 352 - telescopic column; 3521 - liquid channel; 3522 - tapered groove; 353 - spherical liquid sac; 354 - spring telescopic sleeve rod; 355 - tapered head; 356 - first spring; 357 - first telescopic sleeve; 3571 - connecting rod; 358 - second telescopic sleeve; 3581 - telescopic groove; 3582 - second spring; 4 - condylar sphere. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and do not limit the present invention.

[0022] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that: it is not necessary to adopt these specific details to implement the present invention. In other embodiments, well-known structures, circuits, materials or methods are not specifically described in order to avoid obscuring the present invention.

[0023] Throughout the specification, references to "one embodiment", "an embodiment", "one example" or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Thus, the phrases "one embodiment", "an embodiment", "one example" or "an example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Additionally, the particular features, structures, or characteristics may be combined in any suitable combination and / or sub - combination in one or more embodiments or examples. Further, those of ordinary skill in the art should understand that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] In the description of the present invention, the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention.

[0025] As Figure 1-10 shown, the present invention provides a bionic artificial temporomandibular joint replacement prosthesis, including a glenoid fossa prosthesis 1 and a ramus prosthesis 2. A glenoid fossa liner 3 is provided at the bottom of the glenoid fossa prosthesis 1. By providing the glenoid fossa liner 3 between the glenoid fossa prosthesis 1 and the ramus prosthesis 2, the wear degree between the two can be effectively reduced, making the movement more smooth during the activity and minimizing the occurrence of the infection risk. The glenoid fossa liner 3 is in a semi - elliptical structure. Two transverse telescopic sleeves 32 and a plurality of circumferential telescopic components 35 are provided in the glenoid fossa liner 3. The transverse telescopic sleeves 32 and the circumferential telescopic components 35 can ensure a certain buffer during the activity, making the movement more rounded and reducing the influence brought by contact friction. A spherical socket 33 is connected between the two transverse telescopic sleeves 32. A condylar sphere 4 is provided at the top of the ramus prosthesis 2. The condylar sphere 4 is movably connected in the spherical socket 33. By using the movable connection method of the spherical socket 33 and the condylar sphere 4, the stability of the connection between the glenoid fossa prosthesis 1 and the ramus prosthesis 2 during the activity can be ensured, and the connection between the glenoid fossa prosthesis 1 and the ramus prosthesis 2 is prevented from being more easily worn due to insufficient matching stability.

[0026] In the above - mentioned solution, the glenoid fossa prosthesis 1 is composed of a mutually perpendicular extension plate 11 and a fixed wing plate 12. The fixed wing plate 12 is provided at the rear side of the extension plate 11. A glenoid fossa recess 111 is provided at the bottom of the extension plate 11. The glenoid fossa liner 3 is embedded in the glenoid fossa recess 111. A plurality of first fixing holes 121 are provided through the fixed wing plate 12.

[0027] As an optimized technical solution of the present invention, during the replacement process, the fixed wing plate 12 is installed at a position corresponding to the zygomatic arch of the human body by screws passing through the first fixing holes 121, and the glenoid fossa lining disc 3 is embedded in the glenoid fossa recess 11 to act as a cushion, which can effectively prevent the direct contact between the glenoid fossa recess 111 and the condylar sphere 4 and cause wear, playing an effective protective role.

[0028] In the above solution, the extension plate 11 and the fixed wing plate 12 are an integrally formed structure by 3D printing, and the glenoid fossa recess 111 is an ellipsoidal arc surface.

[0029] As an optimized technical solution of the present invention, by using digital design and 3D printing technology, precise manufacturing of personalized prostheses can be achieved, reducing errors during surgery, improving the safety and success rate of surgery, and the structure design of the glenoid fossa recess 111 with an elliptical spherical arc surface can make the movement smoother and the force more balanced.

[0030] In the above solution, the mandibular ramus prosthesis 2 is composed of a condylar neck 21 at the upper end and a mandibular ramus retention handle 22 at the lower end. The condylar sphere 4 is fixedly connected to the top of the condylar neck 21, and a plurality of second fixing holes 23 are provided through the mandibular ramus retention handle 22.

[0031] As an optimized technical solution of the present invention, the mandibular ramus prosthesis 2 corresponds to different parts of the human body at different positions and is integrally formed by 3D printing technology, which can improve its adaptability to the human body to ensure the use effect of the prosthesis, and the second fixing holes 23 are used to connect with the human mandibular ramus bone by screws to realize the fixation of the mandibular ramus prosthesis 2.

[0032] In the above solution, an installation movable groove 31 is provided at the bottom of the glenoid fossa lining disc 3. Two lateral telescopic sleeves 32 are oppositely connected to the left and right sides inside the installation movable groove 31. The spherical socket 33 is located in the middle of the installation movable groove 31 and is connected between the two lateral telescopic sleeves 32. The condylar sphere 4 is spherically connected in the spherical socket 33; an arc-shaped buffer space 34 is provided outside the installation movable groove 31, and a plurality of circumferential telescopic components 35 are arranged equidistantly in the arc-shaped buffer space 34, and the circumferential telescopic components 35 are perpendicular to the arc surface of the arc-shaped buffer space 34.

[0033] As an optimization technical solution of the present invention, the transverse telescopic sleeve 32 adopts an elastic telescopic rod structure, which will shorten automatically after being squeezed by external force, and will automatically recover after the applied external force is cancelled. During the joint movement, the transverse telescopic sleeve 32 can ensure a certain buffer activity space in the transverse direction, and the circumferential telescopic component 35 can ensure a certain buffer activity space in the circumferential direction, so as to facilitate the smooth movement while avoiding wear as much as possible. At the same time, it is also convenient for the joint to be reset in time after movement, so as to improve the user's use effect and experience, making it more bionic human body structure.

[0034] In the above scheme, the circumferential telescopic component 35 includes a liquid storage base 351, a telescopic column 352, a spherical liquid capsule 353, a spring telescopic sleeve rod 354, a conical head 355, a first spring 356, a first telescopic sleeve 357 and a second telescopic sleeve 358; the liquid storage base 351 is connected to the inner bottom of the arc-shaped buffer space 34, the telescopic column 352 is slidably connected to the upper end of the liquid storage base 351, the spherical liquid capsule 353 is arranged on the top of the telescopic column 352, and the spherical liquid capsule 353 is connected to the inner top of the arc-shaped buffer space 34. A liquid channel 3521 is provided through the center of the telescopic column 352, and the upper end of the liquid channel 3521 is communicated with the spherical liquid capsule 353; a conical groove 3522 is provided at the bottom of the telescopic column 352, and the conical groove 3522 is communicated with the lower end of the liquid channel 3521, and the spring telescopic sleeve rod 354 is vertically connected to the center position inside the liquid storage base 351 The conical head 355 is connected to the upper end of the spring telescopic sleeve rod 354 and is connected to the telescopic groove 3522 through a fixed rod. The conical head 355 corresponds to the conical groove 3522, and a liquid flow gap is formed between the conical head 355 and the conical groove 3522; the first spring 356 is sleeved on the spring telescopic sleeve rod 354, the first spring 356 abuts against the bottom of the telescopic column 352, the second telescopic sleeve 358 is vertically connected to the spherical liquid capsule 353, and docked at the upper end of the liquid channel 3521; a telescopic groove 3581 is provided in the second telescopic sleeve 358, the first telescopic sleeve 357 is slidably connected in the telescopic groove 3581, the bottom annular array of the first telescopic sleeve 357 has multiple second springs 3582, the top annular array of the first telescopic sleeve 357 has multiple connecting rods 3571, and the upper ends of the multiple connecting rods 3571 are connected to the top side of the spherical liquid capsule 353.

[0035] As an optimized technical solution of the present invention, during the movement of the joint, when the circumferential pressure is applied to the articular fossa lining disc 3, it will squeeze the circumferential telescopic component 35, and then the telescopic column 352 will be squeezed and retracted into the liquid storage base 351. During the process of the telescopic column 352 retracting into the liquid storage base 351, it will force the liquid in the liquid storage base 351 to overflow outward along the liquid channel 3521 into the spherical liquid sac 353 above it, causing the spherical liquid sac 353 to bulge. The bulging spherical liquid sac 353 will provide an elastic buffer force for the squeezed part of the articular fossa lining disc 3, making the movement process not appear too mechanical but more in line with the normal movement of the human joint. At the same time, when the spherical liquid sac 353 is squeezed, it will also push the first telescopic sleeve 357 into the telescopic groove 3581 of the second telescopic sleeve 358 through the connecting rod 3571, compressing the second spring 3582, thereby further improving the buffer support ability of the spherical liquid sac 353 to ensure the smoothness of joint movement. At the same time, when the telescopic column 352 retracts into the liquid storage base 351, it will also squeeze the first spring 356, playing a buffering role as well. Therefore, through the multi-stage buffering effect here, the joint movement can be made more smooth, and the wear on the articular fossa can be avoided as much as possible through the buffering relationship.

[0036] In the above solution, the spherical socket 33 is made of ultra-high molecular weight polyethylene, and the condylar sphere 4 is made of cobalt-chromium-molybdenum alloy.

[0037] As an optimized technical solution of the present invention, the contact between ultra-high molecular weight polyethylene and cobalt-chromium-molybdenum alloy has high wear resistance, which can effectively prevent the occurrence of infections and inflammations caused by debris generated during joint movement due to wear.

[0038] Specific implementation case: When using the bionic human temporomandibular joint replacement prosthesis, first place the articular fossa lining disc 3 in the articular fossa recess 111, and connect the condylar sphere 4 in the spherical socket 33 to complete the assembly work between the articular fossa prosthesis 1, the articular fossa lining disc 3, and the mandibular ramus prosthesis 2.

[0039] Then, fix the articular fossa prosthesis 1 to the corresponding position on the zygomatic arch of the human body through the first fixing hole 121 provided on the fixing wing plate 12 using screws, and fix the mandibular ramus prosthesis to the human mandibular ramus bone through the second fixing hole 23 on the mandibular ramus retaining handle 22 using screws, and then the installation work of the bionic artificial temporomandibular joint replacement prosthesis can be completed.

[0040] Secondly, after the bionic artificial temporomandibular joint replacement prosthesis is installed, in order to ensure the smoothness of the joint movement and avoid wear on the fossa that affects the user's use effect and experience, during the movement, the lateral telescopic sleeve 32 and the circumferential telescopic component 35 in the fossa lining plate 3 can provide it with a certain buffering and protection effect, so as to avoid the failure of the replacement surgery due to wear of the fossa contact surface during joint movement.

[0041] Finally, in order to avoid debris generated by wear, the spherical socket 33 at the movable part of the joint socket is made of ultra-high molecular polyethylene, and the condylar ball 4 is made of cobalt-chromium-molybdenum alloy. The wear resistance of the contact surface of the two materials is utilized to improve their service life and use effect.

[0042] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bionic artificial temporomandibular joint replacement prosthesis, comprising a glenoid fossa prosthesis (1) and a ramus prosthesis (2), characterized in that: The bottom of the glenoid fossa prosthesis (1) is provided with a glenoid fossa liner (3). The glenoid fossa liner (3) has a semi-elliptical structure, and two transverse telescopic sleeves (32) and a plurality of circumferential telescopic components (35) are arranged inside the glenoid fossa liner (3). A spherical socket (33) is connected between the two transverse telescopic sleeves (32). The top of the mandibular ramus prosthesis (2) is provided with a condylar sphere (4), and the condylar sphere (4) is movably connected inside the spherical socket (33).

2. The bionic artificial temporomandibular joint replacement prosthesis according to claim 1, characterized in that: The glenoid fossa prosthesis (1) is composed of an extension plate (11) and a fixed wing plate (12) that are perpendicular to each other. The fixed wing plate (12) is arranged at the rear side of the extension plate (11). The bottom of the extension plate (11) is provided with a glenoid fossa recess (111). The glenoid fossa liner (3) is embedded in the glenoid fossa recess (111), and a plurality of first fixing holes (121) are penetrated through the fixed wing plate (12).

3. The bionic artificial temporomandibular joint replacement prosthesis according to claim 2, characterized in that: The extension plate (11) and the fixed wing plate (12) are an integrally formed structure by 3D printing, and the glenoid fossa recess (111) is an ellipsoidal arc surface.

4. The bionic artificial temporomandibular joint replacement prosthesis according to claim 1, characterized in that: The mandibular ramus prosthesis (2) is composed of a condylar neck (21) at the upper end and a mandibular ramus retention handle (22) at the lower end. The condylar sphere (4) is fixedly connected to the top of the condylar neck (21), and a plurality of second fixing holes (23) are penetrated through the mandibular ramus retention handle (22).

5. The bionic artificial temporomandibular joint replacement prosthesis according to claim 1, characterized in that: The bottom of the glenoid fossa liner (3) is provided with an installation activity groove (31). The two transverse telescopic sleeves (32) are relatively connected to the left and right sides inside the installation activity groove (31). The spherical socket (33) is located in the middle of the installation activity groove (31) and is connected between the two transverse telescopic sleeves (32). The condylar sphere (4) is spherically connected inside the spherical socket (33). An arc-shaped buffer space (34) is arranged outside the installation activity groove (31). A plurality of circumferential telescopic components (35) are arranged equidistantly in the arc-shaped buffer space (34), and the circumferential telescopic components (35) are perpendicular to the arc surface of the arc-shaped buffer space (34).

6. The bionic artificial temporomandibular joint replacement prosthesis according to claim 5, wherein: The circumferential telescopic component (35) includes a liquid storage base (351), a telescopic column (352), a spherical liquid sac (353), a spring telescopic sleeve rod (354), a conical head (355), a first spring (356), a first telescopic sleeve (357), and a second telescopic sleeve (358). The liquid storage base (351) is connected to the inner bottom of the arc-shaped buffer space (34). The telescopic column (352) is slidably connected to the upper end of the liquid storage base (351). The spherical liquid sac (353) is arranged at the top of the telescopic column (352). The spherical liquid sac (353) is connected to the inner top of the arc-shaped buffer space (34). A liquid channel (3521) is penetrated through the central position of the telescopic column (352), and the upper end of the liquid channel (3521) communicates with the spherical liquid sac (353). A conical groove (3522) is provided at the bottom of the telescopic column (352). The conical groove (3522) communicates with the lower end of the liquid passage (3521). The spring telescopic sleeve rod (354) is vertically connected to the central position inside the liquid storage base (351). The conical head (355) is connected to the upper end of the spring telescopic sleeve rod (354) and is connected to the telescopic groove (3522) through a fixing rod. The conical head (355) corresponds to the conical groove (3522), and a liquid flow gap is formed between the conical head (355) and the conical groove (3522). The first spring (356) is sleeved on the spring telescopic sleeve rod (354). The first spring (356) abuts against the bottom of the telescopic column (352). The second telescopic sleeve (358) is vertically connected inside the spherical liquid sac (353) and is butted against the upper end of the liquid passage (3521). A telescopic groove (3581) is provided inside the second telescopic sleeve (358). The first telescopic sleeve (357) is slidably connected to the telescopic groove (3581). A plurality of second springs (3582) are annularly arranged at the bottom of the first telescopic sleeve (357). A plurality of connecting rods (3571) are annularly arranged at the top of the first telescopic sleeve (357). The upper ends of the plurality of connecting rods (3571) are connected to the inner top side of the spherical liquid sac (353).

7. A bionic artificial temporomandibular joint replacement prosthesis according to claim 1, characterized in that: The spherical socket (33) is made of ultra-high molecular weight polyethylene, and the condylar sphere (4) is made of cobalt-chromium-molybdenum alloy.

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