A shoulder joint prosthesis for proximal humeral fracture

Abstract

The present invention provides a shoulder joint prosthesis for proximal humeral fractures, and relates to the technical field of artificial prostheses. The present invention comprises a humeral stem, a positioning assembly is arranged in the humeral stem, a first connecting hole is provided at the top of the humeral stem, a positioning block is arranged on one side of the humeral stem, a second connecting hole is provided on the positioning block, a positioning bolt is inserted in the second connecting hole, one end of the positioning bolt is threadedly connected in the first connecting hole, a spacing assembly is threadedly connected on one side of the positioning block, a ball head is inserted on the other side of the spacing assembly, a shoulder glenoid prosthesis is matched and connected on one side of the ball head, and the humeral stem is inserted on the human humerus. By arranging the positioning assembly and the spacing assembly, the present invention can reduce the difficulty of installing the shoulder joint prosthesis for patients with proximal humeral fractures, and can also avoid the situation where the bolts become loose due to long-term use of the shoulder joint prosthesis.

Description

Technical Field

[0001] The invention relates to the technical field of artificial prostheses, in particular to a shoulder joint prosthesis for proximal humeral fractures. Background Art

[0002] A shoulder prosthesis is a medical device used to replace a damaged or painful shoulder joint. It usually consists of three parts: the scapula cup, the humeral head, and a stem in between. These components are usually made of artificial materials such as high-density polyethylene, titanium alloy, and zirconium alloy, and are designed to restore the mechanics and function of the shoulder joint and relieve pain and discomfort.

[0003] Existing shoulder prostheses can replace natural shoulder joints that have lost their functions due to disease, injury or wear, and can bring great convenience when used. However, shoulder prostheses need to be implanted in the human body when used. When a proximal humerus fracture occurs, the installation of the shoulder prosthesis will bring certain difficulties. At the same time, since the shoulder prosthesis is in the human body for a long time, the patient's long-term activities may cause the bolts in the shoulder prosthesis to loosen, which is inconvenient to operate during maintenance. Therefore, the present application provides a shoulder prosthesis for proximal humeral fractures to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a shoulder joint prosthesis for proximal humeral fractures to solve the problems of greater difficulty in installing a shoulder joint prosthesis for humeral fractures and inconvenience in repairing loose shoulder joint prosthesis bolts.

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

[0006] A shoulder joint prosthesis for proximal humeral fractures comprises a humeral stem, a positioning assembly is arranged in the humeral stem, a first connecting hole is opened at the top of the humeral stem, a positioning block is arranged on one side of the humeral stem, a second connecting hole is opened on the positioning block, a positioning bolt is inserted in the second connecting hole, one end of the positioning bolt is threadedly connected to the first connecting hole, a spacing assembly is threadedly connected to one side of the positioning block, a ball head is inserted on the other side of the spacing assembly, a shoulder glenoid prosthesis is cooperatively connected to one side of the ball head, the humeral stem is inserted into the human humerus, a bone cage is arranged on one side of the shoulder glenoid prosthesis, the shoulder glenoid prosthesis is connected to the human shoulder glenoid position through the bone cage, the positioning assembly is used to fix the position between the humeral stem and the humerus, and the spacing assembly is used to maintain the stability of the connection of various structures of the shoulder joint prosthesis.

[0007] Optionally, the positioning assembly includes a threaded rod, a ratchet is fixedly connected to the bottom of the threaded rod, two trigger blocks are threadedly connected to the threaded rod, and positioning plates are provided on both sides of the trigger blocks.

[0008] Optionally, a connecting head is fixedly connected to the top of the threaded rod, a notch is provided on the connecting head, sliding grooves are provided on both sides of the trigger block, limiting grooves are provided on both sides of the sliding groove, one side of the positioning plate is fixedly connected to a slider via a connecting column, and the positioning plate and the trigger block are slidably connected via the slider and the sliding groove.

[0009] Optionally, the threaded rod is rotatably connected in the protective cavity of the humeral stem, an adjustment groove is provided at the top of the humeral stem, a first connecting hole is provided on one side of the adjustment groove, a buffer plate is provided at the bottom of the adjustment groove, a group of symmetrically arranged limit rods are fixedly connected between the buffer plate and the bottom of the protective cavity of the humeral stem, a fixing ring is fixedly connected to the bottom of the protective cavity of the humeral stem, a group of arc-shaped spring clips in an annular array are fixedly connected to the fixing ring, the ratchet is rotatably connected in the fixing ring, the ratchet is cooperatively connected with the arc-shaped spring clip, the end of the arc-shaped spring clip is located between the gap between two adjacent ratchet teeth in the ratchet, and a positioning hole is provided on the side wall of the protective cavity in the humeral stem.

[0010] Optionally, the connecting head of the threaded rod is rotatably connected in the adjustment slot, the trigger block is slidably connected to the limiting rod through a limiting slot, and the positioning plate and the humeral handle are slidably connected through a connecting column and a positioning hole.

[0011] Optionally, the spacer assembly includes a spacer plate and a fixing bolt, a hemispherical shell is provided at one end of the spacer plate, a third connecting hole is provided at the bottom of the hemispherical shell, a fixing bolt is rotatably connected in the hemispherical shell, the threaded side of the fixing bolt passes through the third connecting hole, and a fourth connecting hole is provided at the other end of the spacer plate.

[0012] Optionally, a hemispherical groove is provided on one side of the positioning block, a fifth connecting hole is provided at the bottom of the hemispherical groove, and a sixth connecting hole is provided between the hemispherical groove and the second connecting hole.

[0013] Optionally, the spacer plate and the positioning block are connected through a hemispherical shell and a hemispherical groove, the fixing bolt is threadedly connected in the fifth connecting hole of the hemispherical groove, and the spacer plate is located on one side of the positioning bolt.

[0014] Optionally, a protective bottom plate is provided at the bottom of the ball head, a seventh connecting hole is opened on the protective bottom plate, and a positioning column is fixedly connected to the protective bottom plate.

[0015] Optionally, a fixing column is fixedly connected to the top of the fixing bolt, and the fixing column is inserted into the seventh connecting hole of the ball head. The positioning column passes through the fourth connecting hole, and the positioning column is inserted into the sixth connecting hole.

[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 positioning component, when the operator turns the wrench, the positioning plate can be supported on the inner wall of the humerus, so that the humeral stem can be fixed in the middle. At the same time, the positioning plate is supported on both sides of the humeral fracture, which can provide a certain degree of support for the humerus and avoid the position of the humerus from shifting during surgery. Furthermore, when the shoulder joint prosthesis is used for a long time, it can avoid the loosening of the connection between the humeral stem and the humerus, which may cause the position of the humeral stem to change.

[0018] By setting up the spacer component, the connection between the various parts can be made tighter during the installation of the shoulder joint prosthesis. At the same time, during long-term use, it can prevent the bolts on the prosthesis from loosening, which may lead to problems with the shoulder joint prosthesis. This is safer and can extend the use time of the shoulder joint prosthesis. 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 shoulder joint prosthesis used for proximal humeral fracture;

[0021] Figure 2 It is a schematic structural diagram of the connection between the humeral handle and the ball head of the present invention;

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

[0023] Figure 4 It is a schematic diagram of the humeral handle structure of the present invention;

[0024] Figure 5 is a cross-sectional view of the humeral handle of the present invention;

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

[0026] Figure 7 This is a schematic diagram of the positioning assembly structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the exploded structure of the positioning assembly of the present invention;

[0028] Fig. 9 It is a cross-sectional view of the connection structure between the positioning assembly and the humeral handle of the present invention;

[0029] Fig.10 This is a schematic diagram of the connection structure between the humeral handle and the positioning block of the present invention;

[0030] Fig.11 This is a schematic diagram of the explosion structure of the spacing component of the present invention;

[0031] Fig.12 It is a schematic diagram of the ball head structure of the present invention.

[0032] [Reference Signs]

[0033] 1. humeral handle; 11. adjustment slot; 111. first connecting hole; 112. positioning hole; 12. buffer plate; 13. limit rod; 14. fixing ring; 141. arc spring piece; 2. positioning assembly; 21. threaded rod; 211. connector; 22. ratchet; 23. trigger block; 231. limit slot; 232. slide slot; 24. positioning plate; 241. slider; 3. positioning block; 31. hemispherical slot; 311. fifth connecting hole; 32. sixth connecting hole; 33. second connecting hole; 34. positioning bolt; 4. spacer assembly; 41. spacer plate; 411. hemispherical shell; 412. third connecting hole; 413. fourth connecting hole; 42. fixing bolt; 421. fixing column; 5. ball head; 51. protective base plate; 52. seventh connecting hole; 53. positioning column; 6. glenoid prosthesis.

[0034] 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

[0035] The following is a detailed description of a shoulder joint prosthesis for proximal humeral fracture 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 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.

[0036] 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).

[0037] 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.

[0038] 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.

[0039] 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.

[0040] like Figures 1 to 3 and Fig.10 As shown, an embodiment of the present invention provides a shoulder joint prosthesis for proximal humeral fractures, including a humeral stem 1, a positioning assembly 2 is arranged in the humeral stem 1, a first connecting hole 111 is opened at the top of the humeral stem 1, a positioning block 3 is arranged on one side of the humeral stem 1, a second connecting hole 33 is opened on the positioning block 3, a positioning bolt 34 is inserted in the second connecting hole 33, one end of the positioning bolt 34 is threadedly connected to the first connecting hole 111, a spacing assembly 4 is threadedly connected to one side of the positioning block 3, a ball head 5 is inserted on the other side of the spacing assembly 4, a shoulder glenoid prosthesis 6 is matched and connected to one side of the ball head 5, the humeral stem 1 is inserted into the human humerus, a bone cage is arranged on one side of the shoulder glenoid prosthesis 6, the shoulder glenoid prosthesis 6 is connected to the human shoulder glenoid position through the bone cage, the positioning assembly 2 is used to fix the position between the humeral stem 1 and the humerus, and the spacing assembly 4 is used to maintain the stability of the connection of each structure of the shoulder joint prosthesis.

[0041] In the process of surgically installing a shoulder joint prosthesis for a patient with a proximal humeral fracture, the humeral stem 1 needs to be inserted into the patient's humerus first, and then the operator needs to use a tool to rotate the positioning component 2 so that the positioning component 2 can be supported in the patient's humerus. In this process, not only can the humeral stem 1 be fixed in the patient's humerus, but the positioning component 2 is also supported on both sides of the humeral fracture, which can provide a certain degree of support for the humerus to prevent the humerus from shifting in position during surgery. Then the positioning block 3 is placed on the humeral stem 1 and fixed to the humeral stem 1 by the positioning bolt 34. Then the operator needs to place the spacer plate 41 on the positioning block 3 and fix the spacer plate 41 on the positioning block 3 by the fixing bolt 42. Then the operator needs to insert the ball head 5 on one side of the spacer plate 41 and hit the ball head 5 with a tool to fix the ball head 5 on the spacing component 4. Finally, the glenoid prosthesis 6 is implanted near the patient's glenoid to complete the installation of the shoulder joint prosthesis.

[0042] like Figures 4 to 9 As shown, the positioning assembly 2 includes a threaded rod 21, a ratchet 22 is fixedly connected to the bottom of the threaded rod 21, two trigger blocks 23 are threadedly connected to the threaded rod 21, and positioning plates 24 are arranged on both sides of the trigger blocks 23, a connecting head 211 is fixedly connected to the top of the threaded rod 21, a notch is provided on the connecting head 211, slide grooves 232 are provided on both sides of the trigger blocks 23, and limiting grooves 231 are arranged on both sides of the slide groove 232, one side of the positioning plate 24 is fixedly connected to a slider 241 through a connecting column, the positioning plate 24 and the trigger block 23 are slidably connected through the slider 241 and the slide groove 232, the threaded rod 21 is rotatably connected to the protective cavity of the humeral handle 1, the top of the humeral handle 1 is provided with an adjustment groove 11, one side of the adjustment groove 11 is provided with a first connecting hole 111, and the adjustment groove 11 A buffer plate 12 is provided at the bottom, and a group of symmetrically arranged limit rods 13 are fixedly connected between the buffer plate 12 and the bottom of the protective cavity of the humeral handle 1. A fixing ring 14 is fixedly connected to the bottom of the protective cavity of the humeral handle 1, and a group of circular array arc spring pieces 141 are fixedly connected to the fixing ring 14. The ratchet 22 is rotatably connected in the fixing ring 14, and the ratchet 22 is cooperatively connected with the arc spring piece 141. The end of the arc spring piece 141 is located between the gap between two adjacent ratchet teeth in the ratchet 22. A positioning hole 112 is opened on the side wall of the protective cavity in the humeral handle 1, and the connecting head 211 of the threaded rod 21 is rotatably connected in the adjusting groove 11. The trigger block 23 is slidably connected to the limit rod 13 through the limiting groove 231, and the positioning plate 24 is slidably connected to the humeral handle 1 through the connecting column and the positioning hole 112.

[0043] When the operator inserts the humeral stem 1 into the patient's proximal fractured humerus, the upper and lower two sets of positioning plates 24 need to be located at the upper and lower sides of the fracture. Then the operator needs to insert the wrench into the slot of the connecting head 211. When the operator turns the wrench, under the action of the connecting head 211, the threaded rod 21 starts to rotate synchronously. When the threaded rod 21 rotates, the trigger block 23 located on the threaded rod 21 gradually descends in the protective cavity of the humeral stem 1 under the action of the limit rod 13. During the descent of the trigger block 23, since the shape of the trigger block 23 is an inverted truncated cone, the slider 241 will slide in the slide groove 232. At the same time, the trigger block 23 will also push the slider 241, so that the positioning plate 24 gradually extends out of the surface of the humeral stem 1. When the positioning plate 24 is squeezed on the inner surface of the humerus, the positioning plate 24 cannot move, the trigger block 23 stops moving downward, the threaded rod 21 stops rotating, and the operator stops turning the wrench at this time.

[0044] In this embodiment, if Figures 4 to 9 As shown, when the trigger block 23 moves downward, the ratchet 22 located at the bottom of the threaded rod 21 rotates in the fixing ring 14. When the threaded rod 21 rotates in the opposite direction or the positioning plate 24 moves in the opposite direction, the arc-shaped spring piece 141 is stuck in the gear of the ratchet 22, and the ratchet 22 cannot move in the opposite direction. Therefore, the threaded rod 21 can only rotate in one direction during use. At the same time, it can prevent the positioning plate 24 from moving in the opposite direction and separating from the inner wall of the humerus during long-term use of the shoulder joint prosthesis, resulting in loose connection between the humeral stem 1 and the humerus, thereby causing the position of the humeral stem 1 to change.

[0045] like Figures 1 to 3 , Figures 10 to 12 As shown, the spacing assembly 4 includes a spacing plate 41 and a fixing bolt 42, a hemispherical shell 411 is provided at one end of the spacing plate 41, a third connecting hole 412 is provided at the bottom of the hemispherical shell 411, a fixing bolt 42 is rotatably connected in the hemispherical shell 411, and the threaded side of the fixing bolt 42 passes through the third connecting hole 412, a fourth connecting hole 413 is provided at the other end of the spacing plate 41, a hemispherical groove 31 is provided at one side of the positioning block 3, a fifth connecting hole 311 is provided at the bottom of the hemispherical groove 31, a sixth connecting hole 32 is provided between the hemispherical groove 31 and the second connecting hole 33, and the spacing plate 41 and the positioning block 3 are connected to each other. The blocks 3 are connected with the hemispherical groove 31 through the hemispherical shell 411, the fixing bolt 42 is threadedly connected in the fifth connecting hole 311 of the hemispherical groove 31, the spacer plate 41 is located on one side of the positioning bolt 34, and a protective base plate 51 is provided at the bottom of the ball head 5, a seventh connecting hole 52 is opened on the protective base plate 51, a positioning column 53 is fixedly connected to the protective base plate 51, a fixing column 421 is fixedly connected to the top of the fixing bolt 42, the fixing column 421 is inserted into the seventh connecting hole 52 of the ball head 5, the positioning column 53 passes through the fourth connecting hole 413, and the positioning column 53 is inserted into the sixth connecting hole 32.

[0046] After the operator inserts the humeral stem 1 into the humerus, the positioning bolt 34 needs to be passed through the second connecting hole 33 and threaded into the first connecting hole 111, so that the positioning block 3 can be fixed on the humeral stem 1. Then the operator needs to place the spacer plate 41 on the positioning block 3, so that the hemispherical shell 411 is located in the hemispherical groove 31, and the sixth connecting hole 32 and the fourth connecting hole 413 are aligned. Then the fixing bolt 42 is passed through the third connecting hole 412 and threaded into the fifth connecting hole 311, so that the spacer plate 41 is fixed on the positioning block 3. Finally, the ball head 5 is placed above the spacer plate 41, so that the seventh connecting hole 52 is aligned with the fixing column 421, and the positioning column 53 is aligned with the fourth connecting hole 413. The operator hits the surface of the ball head 5 with a rubber hammer, so that the fixing column 421 is inserted into the seventh connecting hole 52, and the positioning column 53 is passed through the fourth connecting hole 413 and finally inserted into the sixth connecting hole 32, so that the ball head 5 can be firmly fixed on the spacer plate 41 and the positioning block 3.

[0047] In this embodiment, if Figures 1 to 3 and Figures 10 to 12 As shown, the positioning block 3 and the spacer plate 41 are tightly connected by the fixing bolt 42, the spacer plate 41 covers one side of the positioning bolt 34, the positioning column 53 of the ball head 5 is inserted into the sixth connecting hole 32 and the fourth connecting hole 413, and no relative displacement occurs between the spacer plate 41 and the positioning block 3. At the same time, since the ball head 5 is inserted into the fixing bolt 42, the fixing bolt 42 does not rotate during use, and since the spacer plate 41 covers one side of the positioning bolt 34, when the positioning bolt 34 is loose, it needs to move outward. At this time, the spacer plate 41 blocks the movement of the positioning bolt 34, so the positioning bolt 34 will not be loose.

[0048] The working process of the technical solution provided by the present invention is as follows:

[0049] During the process of surgically installing a shoulder joint prosthesis for a patient with a proximal humeral fracture, the humeral stem 1 needs to be inserted into the patient's humerus first. When the operator inserts the humeral stem 1 into the patient's proximal humeral fracture, the upper and lower sets of positioning plates 24 need to be located on the upper and lower sides of the fracture, and then the operator needs to insert the wrench into the slot of the connector 211.

[0050] When the operator turns the wrench, under the action of the connecting head 211, the threaded rod 21 starts to rotate synchronously. When the threaded rod 21 rotates, the trigger block 23 located on the threaded rod 21 gradually descends in the protective cavity of the humeral stem 1 under the action of the limit rod 13. During the descent of the trigger block 23, since the shape of the trigger block 23 is an inverted truncated cone, the slider 241 will slide in the slide groove 232. At the same time, the trigger block 23 will also push the slider 241, so that the positioning plate 24 gradually extends out of the surface of the humeral stem 1. When the positioning plate 24 is squeezed on the inner surface of the humerus, the positioning plate 24 cannot move, the trigger block 23 stops moving downward, and the threaded rod 21 stops moving downward. 21 stops rotating. At this time, the operator stops turning the wrench. When the trigger block 23 moves downward, the ratchet 22 at the bottom of the threaded rod 21 rotates in the fixing ring 14. When the threaded rod 21 rotates in the reverse direction or the positioning plate 24 moves in the reverse direction, the arc-shaped spring piece 141 is stuck in the gear of the ratchet 22, and the ratchet 22 cannot move in the reverse direction. Therefore, the threaded rod 21 can only rotate in one direction during use. At the same time, it is prevented that the positioning plate 24 moves in the reverse direction during the long-term use of the shoulder joint prosthesis, and separates from the inner wall of the humerus, resulting in loose connection between the humeral stem 1 and the humerus, thereby causing the position of the humeral stem 1 to change.

[0051] After the operator inserts the humeral stem 1 into the humerus, the positioning bolt 34 needs to be inserted through the second connecting hole 33 and threaded into the first connecting hole 111, so that the positioning block 3 can be fixed on the humeral stem 1. Then the operator needs to place the spacer plate 41 on the positioning block 3, so that the hemispherical shell 411 is located in the hemispherical groove 31, and the sixth connecting hole 32 and the fourth connecting hole 413 are aligned, and then the fixing bolt 42 is inserted through the third connecting hole 412 and threaded into the fifth connecting hole 311, so that the spacer plate 41 is fixed. The ball head 5 is placed on the positioning block 3, and finally the ball head 5 is placed above the partition plate 41, so that the seventh connecting hole 52 is aligned with the fixing column 421, and the positioning column 53 is aligned with the fourth connecting hole 413. The operator hits the surface of the ball head 5 with a rubber hammer to insert the fixing column 421 into the seventh connecting hole 52, and the positioning column 53 passes through the fourth connecting hole 413 and is finally inserted into the sixth connecting hole 32, so that the ball head 5 can be firmly fixed on the partition plate 41 and the positioning block 3, and finally the glenoid prosthesis 6 is implanted near the patient's glenoid to complete the installation of the shoulder joint prosthesis.

[0052] 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.

[0053] 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 shoulder joint prosthesis for proximal humeral fracture, characterized in that: It comprises a humeral handle, a positioning component is arranged in the humeral handle, a first connecting hole is opened at the top of the humeral handle, a positioning block is arranged at one side of the humeral handle, a second connecting hole is opened on the positioning block, a positioning bolt is inserted in the second connecting hole, one end of the positioning bolt is threadedly connected in the first connecting hole, a spacing component is threadedly connected at one side of the positioning block, a ball head is inserted at the other side of the spacing component, a shoulder glenoid prosthesis is matched and connected at one side of the ball head, the humeral handle is inserted on the human humerus, a bone cage is arranged at one side of the shoulder glenoid prosthesis, and the shoulder glenoid prosthesis is connected to the human shoulder glenoid position through the bone cage; The positioning assembly is used to fix the position between the humeral stem and the humerus, and the spacing assembly is used to maintain the stability of the connection of various structures of the shoulder joint prosthesis; The positioning assembly comprises a threaded rod, a ratchet is fixedly connected to the bottom of the threaded rod, two trigger blocks are threadedly connected to the threaded rod, and positioning plates are arranged on both sides of the trigger blocks; The top of the threaded rod is fixedly connected with a connector, a notch is provided on the connector, both sides of the trigger block are provided with slide grooves, both sides of the slide grooves are provided with limit grooves, one side of the positioning plate is fixedly connected with a slider through a connecting column, and the positioning plate and the trigger block are slidably connected through the slider and the slide groove; The shape of the trigger block is an inverted truncated cone.

2. The shoulder joint prosthesis for proximal humeral fracture according to claim 1, characterized in that: The threaded rod is rotatably connected in the protective cavity of the humeral stem, an adjustment groove is provided on the top of the humeral stem, a first connecting hole is provided on one side of the adjustment groove, a buffer plate is provided at the bottom of the adjustment groove, a group of symmetrically arranged limit rods are fixedly connected between the buffer plate and the bottom of the protective cavity of the humeral stem, a fixing ring is fixedly connected to the bottom of the protective cavity of the humeral stem, a group of arc-shaped spring pieces in an annular array are fixedly connected to the fixing ring, the ratchet is rotatably connected in the fixing ring, the ratchet is cooperatively connected with the arc-shaped spring piece, the end of the arc-shaped spring piece is located between the gap between two adjacent ratchet teeth in the ratchet, and a positioning hole is provided on the side wall of the protective cavity in the humeral stem.

3. The shoulder joint prosthesis for proximal humeral fracture according to claim 2, characterized in that: The connecting head of the threaded rod is rotatably connected in the adjustment groove, the trigger block is slidably connected to the limiting rod through the limiting groove, and the positioning plate and the humeral handle are slidably connected through the connecting column and the positioning hole.

4. The shoulder joint prosthesis for proximal humeral fracture according to claim 3, characterized in that: The spacer assembly includes a spacer plate and a fixing bolt. A hemispherical shell is provided at one end of the spacer plate. A third connecting hole is provided at the bottom of the hemispherical shell. A fixing bolt is rotatably connected in the hemispherical shell. The threaded side of the fixing bolt passes through the third connecting hole. A fourth connecting hole is provided at the other end of the spacer plate.

5. The shoulder joint prosthesis for proximal humeral fracture according to claim 4, characterized in that: A hemispherical groove is formed on one side of the positioning block, a fifth connecting hole is formed at the bottom of the hemispherical groove, and a sixth connecting hole is provided between the hemispherical groove and the second connecting hole.

6. The shoulder joint prosthesis for proximal humeral fracture according to claim 5, characterized in that: The spacer plate and the positioning block are connected through a hemispherical shell and a hemispherical groove, the fixing bolt is threadedly connected in the fifth connecting hole of the hemispherical groove, and the spacer plate is located on one side of the positioning bolt.

7. The shoulder joint prosthesis for proximal humeral fracture according to claim 6, characterized in that: A protective bottom plate is disposed at the bottom of the ball head, a seventh connecting hole is opened on the protective bottom plate, and a positioning column is fixedly connected to the protective bottom plate.

8. The shoulder joint prosthesis for proximal humeral fracture according to claim 7, characterized in that: A fixing column is fixedly connected to the top of the fixing bolt, and the fixing column is inserted into the seventh connecting hole of the ball head. The positioning column passes through the fourth connecting hole, and the positioning column is inserted into the sixth connecting hole.

Images