A metal-ceramic total shoulder prosthesis

Abstract

The present invention provides a metal-ceramic total shoulder joint prosthesis, which relates to the technical field of medical prostheses. It comprises a humeral stem, a back plate is inserted at the top of the humeral stem, a fixing screw is inserted at the back plate, a glenoid plate is inserted at one side of the back plate, a glenosphere head is matched and connected at one side of the glenoid plate, one side of the glenosphere head is fixedly connected to a fixing plate, the humeral stem is inserted in the human humerus, the back plate is fixed to the human humerus by fixing screws, a bone cage is arranged at one side of the fixing plate, the fixing plate is fixed at the position of the human glenoid region by the bone cage, and the back plate is used to adjust the inclination angle of the glenoid plate. By arranging the back plate and the glenoid plate, the present invention can not only adjust the installation angle of the glenoid plate during the transplantation of the metal-ceramic total shoulder joint prosthesis, but also enable the glenoid plate to be accurately installed on the back plate, so that the connection between the glenoid plate and the back plate is more stable.

Description

Technical Field

[0001] The invention relates to the technical field of medical prostheses, and in particular to a metal-ceramic total shoulder joint prosthesis. Background Art

[0002] At present, with the advent of an aging society, shoulder joint diseases are increasing; at the same time, due to social progress, people have higher requirements for health, and the number of joint replacements has increased dramatically. Joint prosthesis replacement is a surgical treatment method, the main purpose of which is to restore joint function, relieve pain, and improve the quality of life of patients. There are many types of shoulder joint prostheses, including metal-ceramic total shoulder prostheses. The main purpose of metal-ceramic total shoulder prostheses is to replace damaged or dysfunctional shoulder joints through artificial implantation, restore their normal movement function, relieve pain, and improve the quality of life of patients. Its advantages are: the metal-ceramic interface layer combines the strength of metals (such as zirconium-niobium alloys) and the wear resistance of ceramics, making the prosthesis extremely wear-resistant and corrosion-resistant. This can significantly reduce the wear caused by long-term friction, thereby extending the service life of the prosthesis; zirconium-niobium alloy, as the main metal material, has good biocompatibility. This means that it has less reaction with human tissue, reducing the risk of rejection or infection that may occur after implantation; advanced 3D printing and forging processing technology are used in the design and manufacturing process of metal-ceramic total shoulder prostheses to ensure the strength and stability of the prosthesis. This strength and stability ensure that the prosthesis can withstand the pressure of daily activities and sports after implantation, thereby maintaining the stability and function of the joint; ceramic materials have a low coefficient of friction, which means that when the joint moves, there is less friction between the metal-ceramic interface layers. This not only reduces wear on the joint, but also reduces the patient's pain and discomfort; metal-ceramic total shoulder prosthesis can be customized according to the patient's specific needs and anatomical structure. This customization ensures that the prosthesis better matches the patient's bone structure, thereby improving surgical results and patient satisfaction.

[0003] Although the existing metal-ceramic total shoulder prosthesis has many advantages during use, when the operator performs the metal-ceramic total shoulder prosthesis transplantation operation, due to the differences in the bone shape and position of each patient, friction occurs between the glenosphere head and the glenoid plate during the metal-ceramic total shoulder prosthesis transplantation. This process not only easily causes a certain amount of wear on the metal ceramic, but also affects the patient's normal movement. At the same time, during the installation of the glenoid plate, since the positioning block on the glenoid plate is located on the back of the glenoid plate, when the operator installs the glenoid plate, if the operator slightly turns the glenoid plate, the glenoid plate and the back plate cannot be installed in place, and the glenoid plate cannot be firmly fixed on the back plate, which not only increases the difficulty of the matching connection between the glenoid plate and the glenosphere head, but may even cause the glenoid plate and the glenosphere head to be unable to match and connect. Therefore, the present application provides a metal-ceramic total shoulder prosthesis to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a metal-ceramic total shoulder prosthesis to solve the problem that the angle of the glenoid plate cannot be adjusted during the operator's metal-ceramic total shoulder prosthesis transplantation, which will cause greater friction between the glenoid plate and the glenosphere head when performing shoulder transplantation on different patients, and the operator is prone to change the installation angle of the glenoid plate when installing the glenoid plate, so that the glenoid plate cannot be firmly connected to the back plate.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A metal-ceramic total shoulder joint prosthesis comprises a humeral stem, a back plate is inserted on the top of the humeral stem, a fixing screw is inserted on the back plate, a glenoid plate is inserted on one side of the back plate, a glenosphere head is cooperatively connected to one side of the glenoid plate, one side of the glenosphere head is fixedly connected to a fixing plate, the humeral stem is inserted in the human humerus, the back plate is fixed to the human humerus by fixing screws, a bone cage is provided on one side of the fixing plate, the fixing plate is fixed to the position of the glenoid region of the human body by the bone cage, the back plate is used to adjust the inclination angle of the glenoid plate and fix the position of the glenoid plate, and the glenoid plate is used to fix the glenosphere head.

[0007] Optionally, a slide groove is provided at the top of the humeral stem, a positioning hole is provided at the middle of the slide groove, and the top of the humeral stem is an arc surface.

[0008] Optionally, a circular array of guide grooves is provided on one side of the back plate, a mounting groove is provided at the bottom of the guide groove, a fixing hole is provided on the back plate, a first positioning groove is provided in the middle of the back plate, a slider is fixedly connected to the other side of the back plate, the slider is slidably connected in the slide groove, and the fixing screw is inserted into the fixing hole.

[0009] Optionally, a second positioning groove is formed on the slider and the back plate, the depth of the second positioning groove is greater than the depth of the first positioning groove, and the second positioning groove and the first positioning groove are arranged perpendicular to each other.

[0010] Optionally, an adjustment groove is provided at the bottom of the second positioning groove of the sliding block, and an adjustment block is slidably connected to the second positioning groove of the sliding block.

[0011] Optionally, an adjusting rod is threadedly connected to the adjusting block, the adjusting rod is slidably connected in the adjusting groove, and one end of the adjusting rod is threadedly connected in the positioning hole.

[0012] Optionally, a first positioning block is fixedly connected to one side of the glenoid plate, second positioning blocks are symmetrically arranged on both sides of the first positioning block, an annular array of placement grooves is opened on the outer surface of the glenoid plate, and an elastic plate is arranged in the placement groove of the glenoid plate.

[0013] Optionally, a glenoid surface is provided on the other side of the glenoid plate, the glenoid surface of the glenoid plate is arc-shaped, an auxiliary groove is provided on one side of the glenoid plate, the height of the second positioning block is greater than the height of the first positioning block, the top of the elastic plate is bent, and one end of the bent elastic plate is fixedly connected to the glenoid plate, and a protrusion is provided on the other end of the elastic plate, and one side of the protrusion on the elastic plate is an inclined surface.

[0014] Optionally, the first positioning block is inserted in the first positioning slot, the second positioning block is inserted in the second positioning slot, the top of the adjusting rod is located between the two second positioning blocks, and the top of the fixing screw is located in the auxiliary slot.

[0015] Optionally, the elastic plate is slidably connected in the guide groove, the protrusion at the bottom of the elastic plate is snap-fitted into the mounting groove at the bottom of the guide groove, and one side of the back plate is tightly fitted with one side of the glenoid plate.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting up a back plate and a humeral stem, when performing a metal-ceramic total shoulder prosthesis transplantation, the operator can not only rotate the angle of the back plate, but also fix the back plate on the humeral stem so that the glenoid plate can be matched and connected with the glenosphere head. This ensures that when facing different groups of people, the inclination angle of the back plate can be changed so that the glenosphere head can be matched and connected with the glenoid plate, thereby avoiding friction between the glenosphere head and the glenoid plate.

[0018] By setting the glenoid plate and the back plate, when the operator fixes the glenoid plate on the back plate, the cooperation between the elastic plate and the guide groove allows the operator to determine the angle of the glenoid plate, so that the glenoid plate can be accurately installed, avoiding the situation that the operator cannot observe the back side during the installation of the glenoid plate due to the glenoid plate positioning block being located on the back plate, resulting in the positioning block on the glenoid plate being unable to be aligned with the back plate, making it impossible to install the glenoid plate. Furthermore, by setting the elastic plate, when the glenoid plate is accurately installed on the back plate, the glenoid plate can be more firmly fixed to the back plate through the elastic plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of a metal-ceramic total shoulder joint prosthesis;

[0021] Figure 2 It is a schematic diagram of a partial explosion structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the humeral handle structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the backplane structure of the present invention;

[0024] Figure 5 A partial cross-sectional view of the back plate of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the glenoid plate of the present invention;

[0026] Figure 7 It is a schematic diagram of the back structure of the glenoid plate of the present invention;

[0027] Figure 8 For the present invention Figure 6 Enlarged view of point A in the middle.

[0028] [Reference Signs]

[0029] 1. Humeral handle; 11. Slide groove; 12. Positioning hole; 2. Fixing screw; 3. Back plate; 31. Guide groove; 311. Mounting groove; 312. Fixing hole; 313. First positioning groove; 314. Second positioning groove; 32. Sliding block; 321. Adjusting groove; 34. Adjusting block; 341. Adjusting rod; 4. Glenoid plate; 41. First positioning block; 411. Auxiliary groove; 42. Second positioning block; 43. Elastic plate; 5. Glenoid head; 6. Fixing plate.

[0030] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0031] The following is a detailed description of a metal ceramic total shoulder joint prosthesis provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0032] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0033] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0034] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0035] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0036] like Figure 1 to Figure 2 As shown, an embodiment of the present invention provides a metal-ceramic total shoulder joint prosthesis, including a humeral stem 1, a back plate 3 is inserted on the top of the humeral stem 1, a fixing screw 2 is inserted on the back plate 3, a glenoid plate 4 is inserted on one side of the back plate 3, a glenosphere head 5 is cooperatively connected to one side of the glenoid plate 4, one side of the glenosphere head 5 is fixedly connected to a fixing plate 6, the humeral stem 1 is inserted into the human humerus, the back plate 3 is fixed to the human humerus by the fixing screw 2, a bone cage is provided on one side of the fixing plate 6, the fixing plate 6 is fixed to the human glenoid region by the bone cage, the back plate 3 is used to adjust the inclination angle of the glenoid plate 4 and fix the position of the glenoid plate 4, the glenoid plate 4 is used to fix the glenosphere head 5, when the patient undergoes a metal-ceramic total shoulder joint prosthesis surgery, the operator first needs to implant the humeral stem 1 into the human humerus The operator then implants the fixing plate 6 into the glenoid region of the human body, and plugs and fixes one side of the glenosphere head 5 onto the fixing plate 6. Then the operator needs to place the back plate 3 at one end of the humeral stem 1 and adjust the angle of the back plate 3. When the angle of the back plate 3 is adjusted, the operator needs to insert the fixing screws 2 into the back plate 3 and implant it into the human body so that the back plate 3 can be fixed to the human body and the humeral stem 1. Finally, the operator needs to plug the glenoid plate 4 into the back plate 3 to fix the position of the glenoid plate 4, and at the same time complete the matching connection between the glenosphere head 5 and the glenoid plate 4, specifically, to make the ball head surface of the glenosphere head 5 contact with the glenoid surface of the glenoid plate 4, and to make the ball head surface of the glenosphere head 5 able to move on the concave glenoid surface of the glenoid plate 4, to complete the implantation of the metal-ceramic total shoulder joint prosthesis.

[0037] like Figures 2 to 5As shown, a slide groove 11 is provided at the top of the humeral stem 1, a positioning hole 12 is provided in the middle of the slide groove 11, the top of the humeral stem 1 is an arc surface, a guide groove 31 of an annular array is provided on one side of the back plate 3, a mounting groove 311 is provided at the bottom of the guide groove 31, a fixing hole 312 is provided on the back plate 3, a first positioning groove 313 is provided in the middle of the back plate 3, a slider 32 is fixedly connected to the other side of the back plate 3, the slider 32 is slidably connected to the slide groove 11, the fixing screw 2 is inserted in the fixing hole 312, and the slider The second positioning groove 314 is provided on the back plate 32, the depth of the second positioning groove 314 is greater than the depth of the first positioning groove 313, the second positioning groove 314 and the first positioning groove 313 are arranged perpendicular to each other, the bottom of the second positioning groove 314 of the slider 32 is provided with an adjustment groove 321, the second positioning groove 314 of the slider 32 is slidably connected with an adjustment block 34, the adjustment block 34 is threadedly connected with an adjustment rod 341, the adjustment rod 341 is slidably connected in the adjustment groove 321, and one end of the adjustment rod 341 is threadedly connected to the adjustment groove 321. When the operator implants the humeral stem 1 into the humerus of the human body, the back plate 3 needs to be placed on the humeral stem 1 first, and the slider 32 needs to be located in the slide groove 11. At this time, the position of the adjustment block 34 needs to be moved so that the bottom of the adjustment rod 341 is aligned with the positioning hole 12. Then, the operator needs to rotate the adjustment rod 341 through a tool, and only a part of the bottom of the adjustment rod 341 needs to be threaded in the positioning hole 12. Then, the operator needs to adjust the angle of the back plate 3 by sliding the back plate 3 up and down according to the position of the glenosphere head 6. When the angle of the back plate 3 is determined, the operator needs to rotate the adjustment rod 341 through a tool again, so that the bottom of the adjustment rod 341 is completely threaded in the positioning hole 12. When the adjustment rod 341 cannot be rotated, the back plate 3 is fixed to the humeral stem 1 through the adjustment block 34. Finally, the operator needs to insert the fixing screw 2 into the fixing hole 312 and insert the fixing screw 2 into the human body to make the position of the back plate 3 more fixed and prevent the back plate 3 from loosening during use.

[0038] In this embodiment, if Figures 2 to 5 As shown, the arc surface on one side of the back plate 3 fits with the arc surface on the top of the humeral stem 1. When the back plate 3 slides, one side of the back plate 3 always fits with one side of the humeral stem 1. At the same time, the width of the second positioning groove 314 is greater than the width of the adjustment groove 321. The bottom of the second positioning groove 314 and the bottom of the adjustment block 34 are both arc-shaped. When the back plate 3 slides, the bottom of the second positioning groove 314 will always keep in contact with the bottom of the adjustment block 34 while sliding.

[0039] like Figures 5 to 8As shown, one side of the glenoid plate 4 is fixedly connected with a first positioning block 41, and the two sides of the first positioning block 41 are symmetrically provided with second positioning blocks 42. The outer surface of the glenoid plate 4 is provided with a ring array of placement grooves, and an elastic plate 43 is provided in the placement groove of the glenoid plate 4. The other side of the glenoid plate 4 is provided with a glenoid surface, and the glenoid surface of the glenoid plate 4 is arc-shaped. An auxiliary groove 411 is provided on one side of the glenoid plate 4. The height of the second positioning block 42 is greater than the height of the first positioning block 41. The top of the elastic plate 43 is bent, and one end of the bent elastic plate 43 is fixedly connected to the glenoid plate 4. A protrusion is provided at the other end of the elastic plate 43, and one side of the protrusion on the elastic plate 43 is an inclined surface. The first positioning block 41 is inserted in the first positioning groove 313, and the second positioning block 42 is inserted in the second positioning groove 314. The top of the adjusting rod 341 is located between the two second positioning blocks 42, and the top of the fixing screw 2 is located in the auxiliary groove 411. The elastic plate 43 is slidably connected in the guide groove 31. The elastic plate The protrusion at the bottom of 43 is clamped in the installation groove 311 at the bottom of the guide groove 31, and one side of the back plate 3 is tightly fitted with one side of the glenoid plate 4. When the back plate 3 is fixed on the humeral handle 1, the operator needs to install the glenoid plate 4 on the back plate 3. When installing the glenoid plate 4, the operator needs to align the elastic plate 43 with the guide groove 31, and then the operator squeezes the glenoid surface of the glenoid plate 4 with a tool to make the glenoid plate 4 enter the back plate 3. During the movement of the glenoid plate 4, the elastic plate 4 3 will be squeezed and slide in the guide groove 31. When the glenoid plate 4 fits with the side of the back plate 3, the squeezed elastic plate 43 will pop open and the protrusion at the bottom of the elastic plate 43 will be stuck into the installation groove 311 at the bottom of the guide groove 31. At this time, the glenoid plate 4 is fixed on the back plate 3. On the contrary, when the installation angle of the glenoid plate 4 is offset, the glenoid plate 4 cannot be normally installed on the back plate 3. At this time, the glenoid plate 4 cannot fit with the back plate 3, making the glenoid plate 4 unable to be used normally.

[0040] The working process of the technical solution of the present invention is as follows:

[0041] When the patient undergoes metal-ceramic total shoulder prosthesis surgery, first, the operator needs to implant the humeral stem 1 on the human humerus, then the operator implants the fixing plate 6 in the glenoid area of ​​the human body, and plugs and fixes one side of the glenosphere head 5 on the fixing plate 6, then the operator needs to place the back plate 3 at one end of the humeral stem 1 and adjust the angle of the back plate 3. When the angle of the back plate 3 is adjusted, the operator needs to insert the fixing screw 2 on the back plate 3 and implant it into the human body so that the back plate 3 can be fixed to the human body and the humeral stem 1. Finally, the operator needs to plug the glenoid plate 4 on the back plate 3 to fix the position of the glenoid plate 4, and at the same time complete the matching connection between the glenosphere head 5 and the glenoid plate 4, specifically, to make the ball head surface of the glenosphere head 5 contact with the glenoid surface of the glenoid plate 4, and to make the ball head surface of the glenosphere head 5 able to move on the concave glenoid surface of the glenoid plate 4, to complete the implantation of the metal-ceramic total shoulder prosthesis.

[0042] After the operator implants the humeral stem 1 into the human humerus, the operator first needs to place the back plate 3 on the humeral stem 1 and make the slider 32 located in the slide groove 11. At this time, the position of the adjustment block 34 needs to be moved so that the bottom of the adjustment rod 341 is aligned with the positioning hole 12. Then, the operator needs to rotate the adjustment rod 341 through a tool and only need to make a part of the bottom of the adjustment rod 341 threaded in the positioning hole 12. Then, the operator needs to adjust the angle of the back plate 3 by sliding the back plate 3 up and down according to the position of the glenosphere head 6. When the angle of the back plate 3 is determined, the operator needs to rotate the adjustment rod 341 again through a tool so that the bottom of the adjustment rod 341 is completely threaded in the positioning hole 12.

[0043] When the adjusting rod 341 cannot rotate, the back plate 3 is fixed to the humeral shaft 1 by the adjusting block 34. Finally, the operator needs to insert the fixing screw 2 into the fixing hole 312 and insert the fixing screw 2 into the human body to make the position of the back plate 3 more fixed to prevent the back plate 3 from loosening during use. The arc surface on one side of the back plate 3 fits with the arc surface on the top of the humeral shaft 1. When the back plate 3 slides, one side of the back plate 3 always fits with one side of the humeral shaft 1. At the same time, the width of the second positioning groove 314 is greater than the width of the adjusting groove 321. The bottom of the second positioning groove 314 and the bottom of the adjusting block 34 are both arc-shaped. When the back plate 3 slides, the bottom of the second positioning groove 314 will always keep in contact with the bottom of the adjusting block 34 while sliding. After the back plate 3 is fixed to the humeral shaft 1, the operator needs to install the glenoid plate 4 on the back plate 3.

[0044] When installing the glenoid plate 4, the operator needs to align the elastic plate 43 with the guide groove 31, and then the operator squeezes the glenoid surface of the glenoid plate 4 with a tool to make the glenoid plate 4 enter the back plate 3. During the movement of the glenoid plate 4, the elastic plate 43 will be squeezed and slide in the guide groove 31. When the glenoid plate 4 fits with the side of the back plate 3, the squeezed elastic plate 43 will pop open and the protrusion at the bottom of the elastic plate 43 will be stuck into the installation groove 311 at the bottom of the guide groove 31. At this time, the glenoid plate 4 is fixed on the back plate 3. On the contrary, when the installation angle of the glenoid plate 4 is offset, the glenoid plate 4 cannot be normally installed on the back plate 3. At this time, the glenoid plate 4 cannot fit with the back plate 3, making the glenoid plate 4 unable to be used normally.

[0045] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A metal-ceramic total shoulder joint prosthesis, characterized in that: It comprises a humeral handle, a back plate is inserted at the top of the humeral handle, a fixing screw is inserted at the back plate, a glenoid plate is inserted at one side of the back plate, a glenosphere head is matched and connected at one side of the glenoid plate, one side of the glenosphere head is fixedly connected to a fixing plate, the humeral handle is inserted in the human humerus, the back plate is fixed to the human humerus by fixing screws, a bone cage is arranged at one side of the fixing plate, the fixing plate is fixed at the position of the glenoid region of the human body by the bone cage, the back plate is used to adjust the inclination angle of the glenoid plate and fix the position of the glenoid plate, and the glenoid plate is used to fix the glenosphere head; A slide groove is provided on the top of the humeral stem, a positioning hole is provided in the middle of the slide groove, and the top of the humeral stem is an arc surface; A circular array of guide grooves is provided on one side of the back plate, a mounting groove is provided at the bottom of the guide groove, a fixing hole is provided on the back plate, a first positioning groove is provided in the middle of the back plate, a slider is fixedly connected to the other side of the back plate, the slider is slidably connected in the slide groove, and the fixing screw is inserted in the fixing hole.

2. The metal-ceramic total shoulder prosthesis according to claim 1, characterized in that: The slider and the back plate are provided with a second positioning groove, the depth of the second positioning groove is greater than the depth of the first positioning groove, and the second positioning groove and the first positioning groove are arranged perpendicular to each other.

3. The metal-ceramic total shoulder joint prosthesis according to claim 2, characterized in that: An adjusting groove is provided at the bottom of the second positioning groove of the sliding block, and an adjusting block is slidably connected in the second positioning groove of the sliding block.

4. The metal-ceramic total shoulder joint prosthesis according to claim 3, characterized in that: An adjusting rod is threadedly connected to the adjusting block, the adjusting rod is slidably connected in the adjusting groove, and one end of the adjusting rod is threadedly connected in the positioning hole.

5. The metal-ceramic total shoulder joint prosthesis according to claim 3, characterized in that: A first positioning block is fixedly connected to one side of the glenoid plate, and second positioning blocks are symmetrically arranged on both sides of the first positioning block. An annular array of placement grooves is opened on the outer surface of the glenoid plate, and an elastic plate is arranged in the placement groove of the glenoid plate.

6. The metal-ceramic total shoulder joint prosthesis according to claim 5, characterized in that: A glenoid surface is provided on the other side of the glenoid plate, and the glenoid surface of the glenoid plate is arc-shaped. An auxiliary groove is provided on one side of the glenoid plate. The height of the second positioning block is greater than the height of the first positioning block. The top of the elastic plate is bent, and one end of the bent elastic plate is fixedly connected to the glenoid plate. A protrusion is provided on the other end of the elastic plate, and one side of the protrusion on the elastic plate is an inclined surface.

7. The metal-ceramic total shoulder joint prosthesis according to claim 5, characterized in that: The first positioning block is inserted in the first positioning slot, the second positioning block is inserted in the second positioning slot, the top of the adjusting rod is located between the two second positioning blocks, and the top of the fixing screw is located in the auxiliary slot.

8. The metal-ceramic total shoulder joint prosthesis according to claim 7, characterized in that: The elastic plate is slidably connected in the guide groove, the protrusion at the bottom of the elastic plate is clamped in the mounting groove at the bottom of the guide groove, and one side of the back plate is tightly fitted with one side of the glenoid plate.

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