Humeral component in a shoulder joint prosthesis

Abstract

The present invention provides a humeral component in a shoulder joint prosthesis, belonging to the technical field of medical prostheses. It includes a glenoid liner, the bottom of the glenoid liner is provided with an anti-shoulder humeral body, the bottom of the anti-shoulder humeral body is provided with a mounting top plate, the bottom of the mounting top plate is provided with six groups of threaded holes distributed at equal angles, and also includes a reducer assembly, the reducer assembly is installed at the bottom of the mounting top plate at equal angles, and the reducer assembly is provided with multiple layers distributed at equal intervals in the vertical direction. The present invention is provided with a support assembly, and through the stability of the hexagonal lattice of the mounting frame, the bone cement is separated, so that the bone cement in the humeral cavity provides solidification support to the surrounding bone cement in layers and blocks, thereby increasing the solidification speed of the bone cement, improving the stability of the installation of the prosthetic bone handle, ensuring that no cavity is generated after the bone cement is filled, and making the prosthetic component more tightly installed on one side of the humerus.

Description

Technical Field

[0001] The invention relates to the technical field of medical prostheses, in particular to a humeral component in a shoulder joint prosthesis. Background Art

[0002] The distal humerus forms the elbow joint with the radius and ulna, which plays a very important role in the physiological functions of the human body. In order to avoid amputation caused by malignant diseases or comminuted fractures of the humerus, distal humeral prosthesis replacement is often used in the treatment of such patients. Since the elbow joint is frequently used in daily life and is easily subjected to stress, in practice, there are high requirements for the fit, stability, biocompatibility, strength, etc. of the distal humeral prosthesis with the radius and ulna.

[0003] During surgery, the existing humeral prosthesis stem is usually inserted directly into the humeral bone cavity. However, the inner wall diameter varies depending on the position in the humeral cavity. After cutting the lesion position, the required length is also different. Inserting the stem directly into the humeral cavity may cause loosening and cause the prosthesis to fall off. At the same time, since the existing stem is usually cylindrical, when bone cement is injected into the humeral cavity, the bone cement can only contact and shape with the surface of the stem. The bone cement lacks layered support and has a slow solidification speed. After long-term use, the integrity of the contact position with the stem cannot be ensured. Therefore, the present application provides a humeral component in a shoulder joint prosthesis to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a humeral component in a shoulder joint prosthesis to solve the problem that the existing humeral prosthesis stem is usually directly inserted into the humeral bone cavity during surgery. However, the position in the humeral cavity is different, and the inner wall diameter is also different. After cutting the lesion position, the required length is also different. Inserting the stem directly into the humeral cavity may cause loosening, causing the prosthesis to fall off. At the same time, since the existing stem is usually cylindrical, when bone cement is injected into the humeral cavity, the bone cement can only contact and shape with the surface of the stem. The bone cement lacks layered support and has a slow solidification speed. Moreover, after long-term use, the integrity of the contact position with the stem cannot be ensured.

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

[0006] A humeral component in a shoulder joint prosthesis, comprising:

[0007] A glenoid liner, wherein a reverse shoulder humerus body is provided at the bottom of the glenoid liner, a mounting top plate is provided at the bottom of the reverse shoulder humerus body, and six groups of threaded holes are provided at equal angles at the bottom of the mounting top plate;

[0008] A variable diameter assembly, wherein the variable diameter assembly is installed at an equal angle at the bottom of the mounting top plate, wherein the variable diameter assembly is evenly spaced in the vertical direction and has multiple layers, wherein each layer of the variable diameter assembly is arranged in multiple groups, wherein the bottom of the variable diameter assembly at the bottom layer is connected to a bone stem end, and wherein the variable diameter assembly is used to adapt to the bone cavity with different inner diameters of the humerus when the bone stem is installed;

[0009] A support assembly, the support assembly being mounted on the inner side of the plurality of groups of the variable diameter assemblies, the support assembly supporting the inner side of the humerus when the support assembly is used to inject bone cement;

[0010] A filling component is nested and installed on the inner side of the mounting top plate, and is used for filling bone cement.

[0011] Optionally, each layer of the reducing assembly includes six mounting boxes, each mounting box is connected to a universal ball at the top, each universal ball is connected to a bolt at the top, each mounting box is provided with a threaded hole 2 at the bottom, the outer side of the bolt of the reducing assembly at the top layer is threadedly engaged with the inner side of the threaded hole 1, the bolts of the middle reducing assembly are respectively threadedly connected to the threaded hole 2 of the upper reducing assembly, and the reducing assembly at the bottom layer is connected to the bone handle end.

[0012] Optionally, an elastic telescopic rod is installed in the inner cavity of each installation box, and the other end of the elastic telescopic rod is connected to a sliding plate. The sliding plate can pass through one end surface of the installation box and slide on the inner side of the installation box. A fixed plate is installed on the other end surface of each installation box.

[0013] Optionally, the bolts are arranged in six groups on each layer, the installation box is made of titanium alloy material, the installation box is arranged in an arc shape, the sliding plate is arranged in an arc shape, the elastic telescopic rod is arranged in an arc shape, the ends of the six groups of sliding plates away from the elastic telescopic rod are rotatably connected to the end of the fixed plate, and the threaded hole 2 is connected to the bolt located on the layer below.

[0014] Optionally, a supporting assembly is arranged in the middle of each layer of the variable diameter assembly, and the supporting assembly includes multiple mounting frames, and the multiple mounting frames are installed on one side of the annular inner wall of the corresponding layer of the mounting box. The multiple mounting frames are connected in a honeycomb arrangement, and connecting plates are arranged at equal angles around each mounting frame.

[0015] Optionally, two groups of snap-in grooves are symmetrically installed on the top of the installation frame, four groups of insertion plates are symmetrically installed on the top of the installation frame, and two groups of snap-in blocks are symmetrically installed on the bottom of the installation frame, and four insertion grooves are respectively arranged on the inner sides of the two groups of snap-in blocks.

[0016] Optionally, each of the mounting frames is configured as a hexagonal lattice body, the mounting frame and the connecting plate are made of ultra-high molecular weight polyethylene material, the connecting plate is nested in the side of the mounting frame, the connecting plates are configured in multiple groups, and the mounting frame close to one side of the mounting box is connected to the mounting box, and the insertion plate can be inserted into the insertion groove.

[0017] Optionally, the filling assembly includes a connecting ring, which is arranged at the center of each layer of the mounting frame arranged in a honeycomb shape. A plurality of connecting rings are evenly distributed in the vertical direction, and the side walls of each group of connecting rings are evenly distributed with six groups of connecting holes.

[0018] Optionally, a filling pipe is nested and connected inside the multiple layers of the connecting rings, a filling port and a pressure relief port are arranged on the top of the filling pipe, and flow holes are evenly distributed on the outer wall of the filling pipe, and the flow holes are distributed at equal angles on the outer wall of the filling pipe.

[0019] Optionally, the connecting holes are respectively connected to holes opened on the side walls of the connecting plate, the filling pipe is made of titanium alloy material, and the flow hole is connected to the connecting hole.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] In the above scheme, a support component is provided, and the stability of the hexagonal lattice of the installation frame is utilized to separate the bone cement, so that the bone cement in the humeral cavity provides solidification support to the surrounding bone cement in layers and blocks, thereby increasing the solidification speed of the bone cement, improving the stability of the installation of the prosthetic stem, ensuring that no cavity is generated after the bone cement is filled, and allowing the prosthetic components to be installed more tightly on one side of the humerus.

[0022] By providing a reducing component, during the insertion process, when the humeral cavity is too small, the inner wall of the humeral cavity squeezes the outer side of the installation box, and the six groups of installation boxes on the same layer are compressed. Since the end of the sliding plate rotates at the end of the fixed plate, the sliding plate slides toward the inside of the corresponding installation box, and the sliding plate squeezes the elastic telescopic rod, and the elastic telescopic rod shrinks inward. The six groups of installation boxes connected on the same layer squeeze the installation frame and the connecting plate toward the direction of the central axis of the installation top plate, so that the diameters of the six connected groups of reducing components become smaller, and can continuously provide support force for the prosthesis to the inner wall of the humeral cavity according to the different insertion depths of the humeral cavity, and can always be close to the inner wall of the humeral cavity, thereby preventing the prosthesis from loosening after surgery and causing secondary injury to the patient.

[0023] By providing a reducing component and manually rotating the bolt, the outer thread of the bolt and the inner thread of the second threaded hole are engaged and fixed with each other. Support components of different lengths can be superimposed according to different humeral cavity depths, thereby improving the variability of the stem length, increasing the practicality of the stem and reducing the cost of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the humeral component in the shoulder joint prosthesis;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the variable diameter component;

[0027] Figure 3 It is a cross-sectional view of the three-dimensional structure of the reducer assembly;

[0028] Figure 4 for Figure 3 A is an enlarged schematic diagram of the three-dimensional structure;

[0029] Figure 5 A schematic diagram of a three-dimensional structure for installing a top plate, a reducing assembly and a bone stem end;

[0030] Figure 6 for Figure 5 The enlarged schematic diagram of the three-dimensional structure of B in the middle;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the support component;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the filling component.

[0033] [Reference Signs]

[0034] 1. Glenoid liner; 2. Anti-shoulder humeral body; 3. Mounting top plate; 4. Variable diameter assembly; 41. Bolt; 42. Universal ball; 43. Mounting box; 44. Sliding plate; 45. Elastic telescopic rod; 46. Fixed plate; 47. Threaded hole two; 5. Support assembly; 51. Mounting frame; 52. Connecting plate; 53. Snap-in groove; 54. Insert plate; 55. Snap-in block; 56. Insert groove; 6. Filling assembly; 61. Connecting ring; 62. Connecting hole; 63. Filling pipe; 64. Filling port; 65. Pressure relief port; 66. Flow hole; 7. Threaded hole one; 8. Handle end.

[0035] 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

[0036] The humeral component in a shoulder joint prosthesis provided by the present invention is described in detail below 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 alternatives 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.

[0037] 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).

[0038] 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.

[0039] 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.

[0040] 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.

[0041] like Figure 1As shown, an embodiment of the present invention provides a humeral component in a shoulder joint prosthesis, including a glenoid liner 1, a reverse shoulder humeral body 2 is arranged at the bottom of the glenoid liner 1, a mounting top plate 3 is arranged at the bottom of the reverse shoulder humeral body 2, six groups of threaded holes 7 are arranged at equal angles at the bottom of the mounting top plate 3, and a reducing component 4 is also included. The reducing component 4 is installed at equal angles at the bottom of the mounting top plate 3, and the reducing component 4 is evenly distributed in multiple layers in the vertical direction, and each layer of the reducing component 4 is arranged in multiple groups. The bottom of the bottom layer of the reducing component 4 is connected to a stem end 8, and the reducing component 4 is used to adapt to the installation of bone cavities with different inner diameters of the humerus when the stem is installed, a supporting component 5, the supporting component 5 is installed on the inner side of the multiple groups of reducing components 4, and the supporting component 5 is used to support the inner side of the humerus when filling bone cement, and a filling component 6, the filling component 6 is nested and installed on the inner side of the mounting top plate 3, and the filling component 6 is used to fill bone cement.

[0042] like Figures 1 to 6 As shown, each layer of the reducer assembly 4 includes six mounting boxes 43, each mounting box is connected to a universal ball 42 on the top, each universal ball is connected to a bolt 41 on the top, and each mounting box is provided with a threaded hole 47 at the bottom, the outer side of the bolt 41 of the top reducer assembly 4 is threadedly engaged with the inner side of the threaded hole 7, the bolts 41 of the middle reducer assembly 4 are respectively threadedly connected to the threaded holes 47 of the upper reducer assembly, and the bottom reducer assembly 4 is connected to the handle end 8; the operator first removes the necrotic part of the humerus on one side of the humerus, measures the length of the humerus according to the actual situation of the patient, and if the prosthesis is too short, aligns the bolt 41 with the threaded hole 47 at the bottom of the already connected mounting box 43, and manually rotates the bolt 41 so that the outer thread of the bolt 41 is meshed and fixed with the inner thread of the threaded hole 47, thereby increasing the number of stacked layers of the reducer assembly 4 and the support assembly 5, and the reducer assembly 4 and The support component 5 is connected to the top of the bone handle end 8 by welding, and then the operator manually rotates the bolt 41 so that the outer thread of the bolt 41 and the inner thread of the threaded hole 47 in the lowest layer of the reducing component 4 connected to the bone handle end 8 are engaged and fixedly connected, thereby completing the direct connection of the reducing components 4 of different layers, so that one end of the bone handle end 8 is connected to the glenoid liner 1, the reverse shoulder humeral body 2 and the mounting top plate 3 as a whole, and between the two layers of mounting frames 51, the clamping block 55 located at the bottom of the upper layer of the mounting frame 51 is aligned with the clamping groove 53 at the top of the lower layer of the mounting frame 51, and the insertion groove 56 of the clamping block 55 is aligned and clamped with the insertion plate 54 at the top of the mounting frame 51, thereby completing the clamping connection between the multiple layers of the mounting frames 51, thereby increasing the length of the prosthetic bone handle end 8. If the prosthesis is too long, it is removed by reverse operation according to the above steps, thereby reducing the length of the prosthetic bone handle end 8.

[0043] like Figures 1 to 6As shown, the inner cavity of each installation box 43 is installed with an elastic telescopic rod 45, and the other end of the elastic telescopic rod 45 is connected to a sliding plate 44. The sliding plate 44 can pass through one end surface of the installation box 43 and slide on the inner side of the installation box 43. The other end surface of each installation box 43 is installed with a fixing plate 46.

[0044] In this embodiment, the bolts 41 are arranged in six groups on each layer to improve the connection stability of each layer of the device. The mounting box 43 is made of titanium alloy material. The mounting box 43 is arranged in an arc shape, the sliding plate 44 is arranged in an arc shape, and the elastic telescopic rod 45 is arranged in an arc shape to improve the rationality of the contraction of the device. The ends of the six groups of sliding plates 44 away from the elastic telescopic rod 45 are rotatably connected to the end of the fixed plate 46 to improve the stability of the sliding plate 44 sliding on the inner side of the mounting box 43.

[0045] like Figure 1 , Figure 6 and Figure 7 As shown, a support assembly 5 is arranged in the middle of each layer of the variable diameter assembly 4, and the support assembly 5 includes a plurality of mounting frames 51, and the plurality of mounting frames 51 are mounted on one side of the annular inner wall of the corresponding layer of mounting box 43, and the plurality of mounting frames 51 are connected in a honeycomb arrangement, and connecting plates 52 are arranged at equal angles around each mounting frame 51; between the mounting frames 51 of the support assembly 5 in the middle of two layers of variable diameter assemblies 4, the clamping block 55 at the bottom of the upper layer of mounting frame 51 is aligned with the clamping groove 53 at the top of the lower layer of mounting frame 51, and the insertion groove 56 of the clamping block 55 is aligned and clamped with the insertion plate 54 at the top of the mounting frame 51, so as to complete the clamping connection between the multiple layers of mounting frames 51, thereby increasing the length of the prosthetic bone stem end 8.

[0046] If the prosthesis is too long, according to the above steps, the operator manually rotates the bolt 41 in the opposite direction so that the outer thread of the bolt 41 and the inner thread of the second threaded hole 47 are relatively rotated and separated, and the centripetal force angle of the bolt 41 in the threaded connection is adjusted through the direction of the universal ball 42 connected to the bottom of the bolt 41 to make it perpendicular to the second threaded hole 47, so that the operator is convenient for the operator to rotate and remove the bolt 41 from the second threaded hole 47 to avoid force jamming. After the two-layer mounting box 43 is separated, the operator manually moves in a direction away from the two-layer mounting box 43 to make the clamping block 55 at the bottom of the upper mounting frame 51 disengage from the top clamping groove 53 of the lower mounting frame 51, and the insertion plate 54 at the top of the lower mounting frame 51 is synchronously disengaged from the inner side of the insertion groove 56 of the upper clamping block 55, thereby removing the assembly of the single-layer reducer component 4 and the support component 5, thereby reducing the length of the prosthetic bone stem end 8, and inserting the connected prosthesis as a whole into the humeral cavity.

[0047] Due to the different sizes of patient skeletons and the different thicknesses of the humerus, the thickness of each section of the humeral cavity is different. During the insertion process, when the humeral cavity is too small, the inner wall of the humeral cavity squeezes the outer side of the installation box 43, and the six groups of installation boxes 43 on the same layer are compressed. Since the end of the sliding plate 44 rotates at the end of the fixed plate 46, the sliding plate 44 slides toward the inside of the corresponding installation box 43, and the sliding plate 44 squeezes the elastic telescopic rod 45, and the elastic telescopic rod 45 shrinks inwardly. The six groups of installation boxes 43 connected on the same layer squeeze the installation frame 51 and the connecting plate 52 in the direction of the central axis of the installation top plate 3, so that the diameter of the connected multiple groups of reducer components 4 becomes smaller. Due to the ultra-high The ultra-high molecular weight polyethylene material is elastic, so that after the installation frame 51 and the connecting plate 52 are squeezed and deformed, they will not cause excessive wear and will not be able to return to their original state. When passing through the humeral cavity with a larger diameter again, the outer wall of the installation box 43 is no longer squeezed, and the elastic telescopic rod 45 returns to its original state outward. The elastic telescopic rod 45 pushes the sliding plate 44 to slide toward the side of the fixed plate 46 connected to the sliding plate 44, so that the diameter of the connected multiple groups of variable diameter components 4 becomes larger. Since the ultra-high molecular weight polyethylene material used for the installation frame 51 and the connecting plate 52 is elastic, the installation frame 51 and the connecting plate 52 are subjected to a tensile force toward the outside, and after deformation, they will not cause excessive wear and will not be able to return to their original state.

[0048] like Figure 1 , Figure 6 and Figure 7 As shown, two groups of snap-in grooves 53 are symmetrically installed on the top of the installation frame 51, four groups of insertion plates 54 are symmetrically installed on the top of the installation frame 51, and two groups of snap-in blocks 55 are symmetrically installed on the bottom of the installation frame 51. Four insertion grooves 56 are respectively arranged on the inner sides of the two groups of snap-in blocks 55.

[0049] In this embodiment, each of the mounting frames 51 is configured as a hexagonal lattice to improve the supporting stability of the mounting frame 51. The mounting frame 51 and the connecting plate 52 use ultra-high molecular weight polyethylene material, so that the mounting frame 51 and the connecting plate 52 have good elasticity. The connecting plate 52 is nested in the side of the mounting frame 51. The connecting plate 52 is configured in multiple groups, and the mounting frame 51 close to the side of the mounting box 43 is connected to the mounting box 43.

[0050] like Figure 1 , Figure 6 and Figure 8As shown, the filling assembly 6 includes a connecting ring 61, which is arranged at the center of each layer of the honeycomb-shaped mounting frame 51. A plurality of connecting rings 61 are evenly spaced in the vertical direction, and the side walls of each group of connecting rings 61 are evenly distributed with six groups of connecting holes 62. The operator inserts the filling pipe 63 into the inner side of the evenly spaced connecting ring 61, aligns the positions of the flow hole 66 and the connecting hole 62, uses a special filling device to connect to the filling port 64, and fills bone cement into the humerus. During the filling process, the pressure relief port 65 is connected to the pressure relief device to avoid the humerus from being damaged during the bone cement filling process. High pressure is generated in the bone cavity, and bone cement diffuses and fills the inner wall of the humeral cavity through the connecting hole 62. The honeycomb-shaped installation frame 51 and the connecting plate 52 provide sufficient supporting force for the bone cement. Compared with directly adding bone cement, the solidification speed of bone cement is increased, and the stability of the installation of the prosthesis handle is improved to prevent the prosthetic joint from loosening after surgery. After waiting for the bone cement to solidify, manually rotate the top-layer bolt 41 so that the bolt 41 is connected and fixed correspondingly to the threaded hole 7 on the installation top plate 3, and then connect and install the reverse shoulder humeral body 2 and the glenoid liner 1 on the top of the installation top plate 3 to complete the installation of the prosthesis on one side of the humerus.

[0051] like Figure 1 , Figure 6 and Figure 8 As shown, a filling pipe 63 is nested and connected to the inner side of the multi-layer connecting ring 61, a filling port 64 and a pressure relief port 65 are arranged on the top of the filling pipe 63, and flow holes 66 are evenly distributed on the outer wall of the filling pipe 63, and the flow holes 66 are evenly distributed on the outer wall of the filling pipe 63.

[0052] In this embodiment, the connecting holes 62 are respectively connected to the holes opened on the side walls of the connecting plate 52. The filling pipe 63 uses titanium alloy material to increase the service life of the filling pipe 63. The flow hole 66 is connected to the connecting hole 62 to improve the filling stability and prevent blockage.

[0053] The working process of the technical solution of the present invention is as follows:

[0054] First, the operator removes the necrotic part of the humerus on one side of the humerus, measures the length of the humerus according to the actual situation of the patient, and if the prosthesis is too short, aligns the bolt 41 with the threaded hole 47 at the bottom of the already connected installation box 43, and manually rotates the bolt 41 so that the outer thread of the bolt 41 and the inner thread of the threaded hole 47 are engaged and fixed with each other, thereby increasing the number of superimposed layers of the reducer assembly 4 and the support assembly 5. The reducer assembly 4 and the support assembly 5 at the bottom are connected to the top of the bone handle end 8 by welding, and then the operator manually rotates the bolt 41 to engage with the bone handle end In the reducer assembly 4 connected to 8, the outer thread of the bolt 41 and the inner thread of the threaded hole 47 are meshed and fixed with each other, so that one end of the stem end 8 is connected to the glenoid liner 1, the reverse shoulder humerus body 2 and the mounting top plate 3 as a whole, and between the two layers of mounting frames 51, the clamping block 55 located at the bottom of the upper layer of mounting frame 51 is aligned with the clamping groove 53 at the top of the lower layer of mounting frame 51, and the insertion groove 56 of the clamping block 55 is aligned and clamped with the insertion plate 54 at the top of the mounting frame 51, so as to complete the clamping connection between the multiple layers of mounting frames 51, thereby increasing the length of the prosthetic stem end 8.

[0055] If the prosthesis is too long, according to the above steps, the operator manually rotates the bolt 41 in the opposite direction to make the outer thread of the bolt 41 and the inner thread of the second threaded hole 47 rotate and separate relative to each other, and adjusts the centripetal force angle of the bolt 41 in the threaded connection through the orientation of the universal ball 42 connected to the bottom of the bolt 41 to make it perpendicular to the second threaded hole 47, so that the operator is convenient for the operator to rotate and remove the bolt 41 from the second threaded hole 47 to avoid force jamming. After the two-layer mounting box 43 is separated, the operator manually moves away from the two-layer mounting box 43 to make the clamping block 55 at the bottom of the upper mounting frame 51 disengage from the top clamping groove 53 of the next mounting frame 51, and the insertion plate 54 at the top of the next mounting frame 51 is synchronously disengaged from the inner side of the insertion groove 56 of the upper clamping block 55, thereby removing the assembly of the single-layer reducer component 4 and the support component 5, thereby reducing the length of the prosthetic bone stem end 8.

[0056] The connected prosthesis is inserted into the humeral cavity as a whole. Due to the different sizes of patient skeletons and the different thicknesses of the humerus, the thickness of each section of the humeral cavity is different. During the insertion process, when the humeral cavity is too small, the inner wall of the humeral cavity squeezes the outer side of the mounting box 43, and the six groups of mounting boxes 43 on the same layer are compressed. Since the end of the sliding plate 44 rotates at the end of the fixed plate 46, the sliding plate 44 slides toward the inside of the corresponding mounting box 43, and the sliding plate 44 squeezes the elastic telescopic rod 45, and the elastic telescopic rod 45 shrinks inwardly. The six groups of mounting boxes 43 connected on the same layer squeeze the mounting frame 51 and the connecting plate 52 in the direction of the central axis of the mounting top plate 3, so that the diameter of the connected multiple groups of reducing components 4 becomes smaller. Since the ultra-high molecular weight polyethylene material used for the mounting frame 51 and the connecting plate 52 is elastic, after the mounting frame 51 and the connecting plate 52 are squeezed and deformed, they will not cause excessive wear and cannot be restored to their original state.

[0057] When passing through the humeral cavity of a larger diameter again, since the outer wall of the installation box 43 is no longer squeezed, the elastic telescopic rod 45 returns to its original state outward, and the elastic telescopic rod 45 pushes the sliding plate 44 to slide toward the side of the fixed plate 46 connected to the sliding plate 44, so that the diameter of the connected multiple groups of variable diameter components 4 increases. Since the ultra-high molecular weight polyethylene material used in the installation frame 51 and the connecting plate 52 is elastic, the installation frame 51 and the connecting plate 52 are subjected to a tensile force outward, and after deformation, they will not cause excessive wear and will not be able to return to their original state. Subsequently, the operator inserts the filling pipe 63 into the inner side of the connecting ring 61 arranged at equal intervals, aligns the positions of the flow hole 66 and the connecting hole 62, and uses a special filling device to connect to the filling port 64. Bone cement is injected into the humerus. During the injection process, the pressure relief port 65 is connected to the pressure relief device to avoid high pressure in the humeral cavity during the bone cement injection process. The bone cement diffuses and fills the inner wall of the humeral cavity through the connecting hole 62. The honeycomb-shaped installation frame 51 and the connecting plate 52 provide sufficient support for the bone cement. Compared with direct injection of bone cement, the solidification speed of the bone cement is increased, the stability of the installation of the prosthesis handle is improved, and the loosening of the prosthesis joint after surgery is prevented. After waiting for the bone cement to solidify, the topmost bolt 41 is manually rotated to make the bolt 41 correspond to the threaded hole 7 on the installation top plate 3 and connected and fixed. Then, the anti-shoulder humeral body 2 and the glenoid liner 1 are connected and installed on the top of the installation top plate 3 to complete the installation of the prosthesis on one side of the humerus.

[0058] 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.

[0059] 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 humeral component in a shoulder joint prosthesis, characterized in that: include: A glenoid liner, wherein a reverse shoulder humerus body is provided at the bottom of the glenoid liner, a mounting top plate is provided at the bottom of the reverse shoulder humerus body, and six groups of threaded holes are provided at equal angles at the bottom of the mounting top plate; A variable diameter assembly, wherein the variable diameter assembly is installed at an equal angle at the bottom of the mounting top plate, wherein the variable diameter assembly is evenly spaced in the vertical direction and has multiple layers, wherein each layer of the variable diameter assembly is arranged in multiple groups, wherein the bottom of the variable diameter assembly at the bottom layer is connected to a bone stem end, and wherein the variable diameter assembly is used to adapt to the bone cavity with different inner diameters of the humerus when the bone stem is installed; A support assembly, the support assembly being mounted on the inner side of the plurality of groups of the variable diameter assemblies, the support assembly supporting the inner side of the humerus when the support assembly is used to inject bone cement; A filling component, the filling component is nested and installed on the inner side of the mounting top plate, and the filling component is used for filling bone cement; Each layer of the reducing assembly includes six installation boxes, each of which is connected to a universal ball at the top, each of which is connected to a bolt at the top, and each of which is provided with a threaded hole 2 at the bottom. The outer side of the bolt of the reducing assembly at the top layer is threadedly engaged with the inner side of the threaded hole 1, and the bolts of the reducing assembly in the middle layer are respectively threadedly connected to the threaded hole 2 of the reducing assembly at the upper layer, and the reducing assembly at the bottom layer is connected to the bone handle end; An elastic telescopic rod is installed in the inner cavity of each installation box, and the other end of the elastic telescopic rod is connected to a sliding plate, and the sliding plate can penetrate one end surface of the installation box and slide inside the installation box, and the other end surface of each installation box is installed with a fixed plate; The bolts are arranged in six groups on each layer, the installation box is made of titanium alloy, the installation box is arranged in an arc shape, the sliding plate is arranged in an arc shape, the elastic telescopic rod is arranged in an arc shape, the ends of the six groups of sliding plates away from the elastic telescopic rod are rotatably connected to the ends of the fixed plates, and the threaded holes 2 are connected to the bolts located on the lower layer; A support assembly is arranged in the middle of each layer of the variable diameter assembly, and the support assembly includes a plurality of mounting frames, and the plurality of mounting frames are mounted on one side of the annular inner wall of the corresponding layer of the mounting box, and the plurality of mounting frames are connected and arranged in a honeycomb shape, and connecting plates are arranged at equal angles around each mounting frame; Two groups of clamping grooves are symmetrically installed on the top of the installation frame, four groups of insertion plates are symmetrically installed on the top of the installation frame, and two groups of clamping blocks are symmetrically installed on the bottom of the installation frame, and the inner sides of the two groups of clamping blocks are respectively provided with four insertion grooves; Each of the installation frames is configured as a hexagonal lattice body, the installation frames and the connecting plates are made of ultra-high molecular weight polyethylene material, the connecting plates are nested in the side of the installation frames, the connecting plates are configured in multiple groups, and the installation frames close to one side of the installation box are connected to the installation box, and the insertion plates can be inserted into the insertion slots; The filling assembly comprises a connecting ring, which is arranged at the center of each layer of the mounting frame arranged in a honeycomb shape, and a plurality of connecting rings are arranged in a vertical direction with equal spacing, and the side wall of each group of the connecting rings is provided with six groups of connecting holes with equal angles; The inner side of the multi-layer connecting ring is nested with a filling pipe, the top of the filling pipe is provided with a filling port and a pressure relief port, and the outer wall of the filling pipe is evenly distributed with flow holes, and the flow holes are evenly distributed at angles on the outer wall of the filling pipe. The connecting holes are respectively connected with holes provided on the side wall of the connecting plate. The filling pipe is made of titanium alloy material. The flow hole is connected with the connecting hole.

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