Glenoid base and shoulder joint prosthesis

Abstract

The present invention provides a glenoid base and a shoulder joint prosthesis. The glenoid base includes: a substrate including a connection surface; a connection column disposed on the connection surface, and a receiving groove is provided on the connection column; a deformable coupling member connected to the connection column and located at the receiving groove, and the deformable coupling member deforms to have a received state located in the receiving groove and a coupling state extending outside the connection column. The technical solution of the present application effectively solves the problem of poor connection reliability between the glenoid base in the related art and the autologous bone.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly, to a glenoid base and a shoulder joint prosthesis. Background Art

[0002] A shoulder joint prosthesis includes a glenoid base and a glenoid head prosthesis. The glenoid base is fixed to the autologous bone, and the glenoid base cooperates with the glenoid head prosthesis.

[0003] In the related art, the glenoid base is usually directly fixed to the autologous bone by multiple screws. Although this method can provide initial stability, during the patient's movement, especially under the frequent movement of the shoulder joint, the screws are prone to fatigue loosening under the long-term mechanical cyclic load, resulting in fretting between the screws and the autologous bone, and thus the connection reliability between the glenoid base and the autologous bone is poor.

[0004] In this way, the glenoid base in the related art is fixed to the autologous bone by screws, which easily leads to poor connection reliability between the glenoid base and the autologous bone. Summary of the Invention

[0005] The main object of the present invention is to provide a glenoid base and a shoulder joint prosthesis to solve the problem of poor connection reliability between the glenoid base in the related art and the autologous bone.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided a glenoid base, including: a substrate including a connection surface; a connection column disposed on the connection surface, the connection column having a receiving groove; a deformation coupling member connected to the connection column and located at the receiving groove, the deformation coupling member deforming to have a received state located in the receiving groove and a coupled state extending out of the connection column.

[0007] Further, the glenoid base further includes a sleeve sleeved on the outside of the connection column, the sleeve being rotatable relative to the connection column, the sleeve having an avoidance hole, and the sleeve rotating to have a blocking state covering the mouth of the receiving groove and an avoidance state communicating the avoidance hole with the receiving groove.

[0008] Further, an internal thread is provided on the inner side wall of the sleeve, and an external thread capable of being threadedly engaged with the internal thread is provided on the outer side wall of the connection column; and / or, the mouth of the receiving groove penetrates through the side wall of the connection column, there are a plurality of deformation coupling members, the plurality of deformation coupling members are spaced apart in the receiving groove, there are a plurality of avoidance holes, and the plurality of avoidance holes are provided in one-to-one correspondence with the plurality of deformation coupling members.

[0009] Further, a barb angled with the connection surface is further provided on the connection surface, the barb having a root and a tip, and the barb gradually moves away from the connection surface in the direction from the root to the tip.

[0010] Furthermore, when the deformable coupling is in a coupled state, the deformable coupling includes a first connecting section located inside the sleeve and a second connecting section extending outside the sleeve; in the radial direction from the inside to the outside of the sleeve, the second connecting section gradually approaches the connecting surface; and / or, the length of the second connecting section is L, 0.1mm≤L≤10mm.

[0011] Furthermore, the base plate also includes a mounting surface arranged opposite to the connecting surface and a circumferential surface connected between the connecting surface and the mounting surface. The glenoid base also includes a deformable reinforcing thorn arranged on the circumferential surface, and the deformable reinforcing thorn is deformed to have a retracted state and an inserted state; when the deformable reinforcing thorn is in the retracted state, the deformable reinforcing thorn extends along the circumference of the base plate; when the deformable reinforcing thorn is in the inserted state, the deformable reinforcing thorn extends toward the connecting column.

[0012] Furthermore, the deformation reinforcing thorns and / or the deformation connecting pieces are made of memory alloy.

[0013] Furthermore, the substrate also includes a mounting surface arranged opposite to the connecting surface, a first mounting hole penetrating the connecting surface and the mounting surface is provided on the substrate, a second mounting hole connected to the first mounting hole is provided on the connecting column, the second mounting hole penetrates the surface of the connecting column away from the substrate, and a bottom plate is provided at the bottom of the sleeve, and the bottom plate covers the second mounting hole.

[0014] Furthermore, a first positioning member is provided on the sleeve, and a second positioning member is provided on the base plate. When the first positioning member is positioned and matched with the second positioning member, the sleeve is in an avoidance state.

[0015] Furthermore, the connecting surface is provided with a thorn that is angled to the connecting surface, and the thorn has a root and a tip; a positioning groove is provided on the sleeve, and a first floating bead and a second floating bead are provided on the connecting surface, which are arranged at intervals along the circumference of the sleeve, and both the first floating bead and the second floating bead can be arranged in a floating manner; when the positioning groove is positioned and matched with the first floating bead, the sleeve is in an avoidance state; when the second floating bead is positioned and matched with the positioning groove, the sleeve is in a blocking state; on the connecting surface, a directed line segment from the center of the first floating bead to the center of the second floating bead is set as the first vector, and a directed line segment from the center of the root to the tip is set as the second vector; the first vector and the second vector form a vector angle X, 0°≤X≤60°; and / or, the modulus of the first vector is A, the modulus of the second vector is B, -5mm≤AB≤5mm.

[0016] According to another aspect of the present invention, a shoulder joint prosthesis is provided, comprising a glenoid base, wherein the glenoid base is the glenoid base described above.

[0017] According to the technical solution of the present invention, the glenoid base includes: a base plate, a connecting post, and a deformable coupling. The base plate includes a connecting surface. The connecting post is provided on the connecting surface, and a receiving groove is provided on the connecting post. The deformable coupling is connected to the connecting post and is located at the receiving groove. The deformable coupling is deformed to have a storage state located within the receiving groove and a coupling state extending out of the connecting post. By providing the connecting post and the deformable coupling on the connecting surface of the base plate, after the connecting post is inserted into the autologous bone, the deformable coupling can be switched to the coupling state extending out of the connecting post, so that the deformable coupling can be inserted into the autologous bone and connected and fixed to the autologous bone, thereby enhancing the biological fixation of the glenoid base and the autologous bone. Before and during the insertion of the connecting post into the autologous bone, the deformable coupling is in the storage state located in the receiving groove, so as to reduce damage to the autologous bone during the insertion of the connecting post into the autologous bone. In addition, the provision of the connecting post facilitates the provision of the receiving groove and also facilitates the processing of the deformable coupling. In this way, the connection between the deformable joint and the autologous bone avoids the fatigue loosening of the screws in the related art due to frequent movement, making the connection between the glenoid base and the autologous bone more stable and reliable, and improving the reliability of the connection between the glenoid base and the autologous bone. Therefore, the technical solution of this application effectively solves the problem of poor reliability of the connection between the glenoid base and the autologous bone in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a glenoid base according to the present invention is shown;

[0020] Figure 2 Shown Figure 1 A schematic diagram of the three-dimensional structure of the glenoid base from another perspective;

[0021] Figure 3 Shown Figure 1 A schematic diagram of the three-dimensional structure of the glenoid base without showing the sleeve;

[0022] Figure 4 Shown Figure 1 A cross-sectional view of the glenoid base when the sleeve is in a shielding state and the deformable coupling member is in a retracted state;

[0023] Figure 5 Shown Figure 1 A cross-sectional view of the glenoid base when the sleeve is in an evasive state and the deformable coupling member is in a coupled state;

[0024] Figure 6 Shown Figure 1Schematic perspective view of the sleeve of the glenoid base

[0025] Figure 7 shows Figure 1 Schematic perspective view of the glenoid base when combined with autologous bone

[0026] Among them, the above-mentioned drawings include the following reference numerals:

[0027] 10. Substrate; 11. Connection surface; 12. Mounting surface; 13. Circumferential surface; 14. First mounting hole; 15. Connection hole

[0028] 20. Connection column; 21. Accommodating groove; 22. Second mounting hole

[0029] 30. Deformable coupling member; 31. First connection section; 32. Second connection section

[0030] 40. Sleeve; 41. Avoidance hole

[0031] 51. Spine; 52. Deformable reinforcing spine; 521. Deformable section; 522. Reinforcing spine section; 53. Bottom plate; 54. First convex block; 541. First fixing groove; 542. Guide inclined surface; 55. Second convex block; 551. Second fixing groove Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention

[0033] It should be noted that the terms used here are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used here, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof

[0034] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] In this embodiment, as Figures 1 to 7 shown, the glenoid base includes: a substrate 10, a connecting column 20, and a deformable coupling member 30. The substrate 10 includes a connecting surface 11. The connecting column 20 is disposed on the connecting surface 11, and a receiving groove 21 is provided on the connecting column 20. The deformable coupling member 30 is connected to the connecting column 20 and is located at the receiving groove 21. The deformable coupling member 30 deforms to have a received state located within the receiving groove 21 and a coupled state extending outside the connecting column 20.

[0036] In this way, by providing the connecting column 20 and the deformable coupling member 30 on the connecting surface 11 of the substrate 10, after the connecting column 20 is inserted into the autologous bone, the deformable coupling member 30 can be switched to the coupled state extending outside the connecting column 20, so that the deformable coupling member 30 can be inserted into the autologous bone and connected and fixed to the autologous bone, enhancing the biological fixation between the glenoid base and the autologous bone. Before the connecting column 20 is inserted into the autologous bone and during the process of inserting the connecting column 20 into the autologous bone, the deformable coupling member 30 is in the received state located within the receiving groove 21 to reduce the damage to the autologous bone during the process of inserting the connecting column 20 into the autologous bone. Moreover, the setting of the connecting column 20 facilitates the setting of the receiving groove 21 and also facilitates the processing of the deformable coupling member 30. In this way, the connection between the deformable coupling member 30 and the autologous bone avoids the fatigue loosening of the screws in the related art under frequent movement, making the connection between the glenoid base and the autologous bone more stable and reliable, and improving the connection reliability between the glenoid base and the autologous bone. Therefore, the technical solution of the present application effectively solves the problem of poor connection reliability between the glenoid base and the autologous bone in the related art.

[0037] As Figures 1 to 7As shown, the glenoid base further includes a sleeve 40 sleeved outside the connecting column 20, and the sleeve 40 and the connecting column 20 can rotate relative to each other. An avoidance hole 41 is provided on the sleeve 40, and the sleeve 40 rotates to have a shielding state covering the mouth of the accommodation groove 21 and an avoidance state communicating the avoidance hole 41 with the accommodation groove 21. Before and during the insertion of the connecting column 20 into the autologous bone, the sleeve 40 is in the shielding state, and the deformable engaging member 30 is in the storage state. After the connecting column 20 is inserted into the autologous bone, the sleeve 40 is in the avoidance state, so that the deformable engaging member 30 can automatically switch to the engaging state, and the deformable engaging member 30 extends out of the avoidance hole 41 and outside the sleeve 40 and is inserted into the autologous bone. The design of relative rotation between the sleeve 40 and the connecting column 20, and the cooperation between the avoidance hole 41 and the accommodation groove 21 enable the deformable engaging member 30 to be shielded during implantation, further reducing the possibility of damage to the autologous bone caused by the deformable engaging member 30 extending out of the connecting column 20 due to processing errors or long implantation time during the implantation process, and also protecting the deformable engaging member 30 from external forces, improving the connection reliability between the deformable engaging member 30 and the autologous bone when in the engaging state. After implantation, the sleeve 40 can be switched to the avoidance state to release the deformable engaging member 30, so that the deformable engaging member 30 automatically extends outside the sleeve 40 to connect with the autologous bone, thereby increasing the stability and safety of bone integration.

[0038] In this embodiment, when implanting the glenoid base into the autologous bone, first insert the autologous bone into the sleeve 40 along the circumferential direction of the sleeve 40 to implant the sleeve 40 into the autologous bone. Then rotate the base plate 10 to drive the connecting column 20 to rotate relative to the sleeve 40, so that the sleeve 40 is in the avoidance state, enabling the deformable engaging member 30 to switch to the engaging state. When the sleeve 40 is in the avoidance state and the deformable engaging member 30 is in the engaging state, the deformable engaging member 30 extends outside the sleeve 40 to connect with the autologous bone. Both the connecting column 20 and the sleeve 40 are cylindrical structures.

[0039] In this embodiment, the avoidance hole 41 penetrates the side wall of the sleeve 40, and the diameter of the avoidance hole 41 gradually decreases in the radial direction from the inside to the outside of the sleeve 40, so that during the process of the deformable engaging member 30 extending out of the avoidance hole 41, the hole wall of the avoidance hole 41 can be in guiding cooperation with the deformable engaging member 30. The base plate 10 and the connecting column 20 are integrally formed structures.

[0040] As Figures 1 to 7As shown, the inner sidewall of the sleeve 40 is provided with an internal thread, and the outer sidewall of the connecting post 20 is provided with an external thread that can be threadedly matched with the internal thread. The threaded matching structure between the inner sidewall of the sleeve 40 and the outer sidewall of the connecting post 20 not only ensures a secure connection between the sleeve 40 and the connecting post 20, but also allows the sleeve 40 to be switched between a blocking state and a circumventing state by rotating the base plate 10 and the connecting post 20, thereby improving operational flexibility. The mouth of the receiving groove 21 passes through the sidewall of the connecting post 20. There are multiple deformable coupling members 30, and the multiple deformable coupling members 30 are spaced apart within the receiving groove 21. There are multiple avoidance holes 41, and the multiple avoidance holes 41 are provided in a one-to-one correspondence with the multiple deformable coupling members 30. The provision of multiple deformable coupling members 30 and multiple avoidance holes 41 increases the number of connections between the glenoid base and the autologous bone, making the bone integration surface more extensive, enhancing the overall stability of the glenoid base, and reducing fatigue and loosening that may occur at a single connection point. Furthermore, a plurality of deformable coupling members 30 are spaced apart in the receiving groove 21 , which facilitates the arrangement of the deformable coupling members 30 and the processing of the connecting column 20 .

[0041] In this embodiment, a plurality of receiving grooves 21 are arranged at intervals along the circumference of the connecting column 20, and a plurality of deformable coupling members 30 are disposed in each receiving groove 21. Preferably, there are 1 to 20 receiving grooves 21 arranged at intervals along the circumference of the connecting column 20, and 1 to 10 deformable coupling members 30 are disposed in each receiving groove 21.

[0042] In other embodiments, the inner sidewall of the sleeve 40 is provided with an internal thread, and the outer sidewall of the connecting post 20 is provided with an external thread that can mate with the internal thread. Alternatively, the opening of the receiving groove 21 passes through the sidewall of the connecting post 20, multiple deformable coupling members 30 are provided, and the multiple deformable coupling members 30 are spaced apart within the receiving groove 21, and multiple avoidance holes 41 are provided, and the multiple avoidance holes 41 are provided in a one-to-one correspondence with the multiple deformable coupling members 30.

[0043] like Figures 1 to 7 As shown, the connecting surface 11 is also provided with a spike 51 angled relative to the connecting surface 11. Spike 51 has a base and a tip, and gradually moves away from the connecting surface 11 from the base to the tip. The design of spike 51 increases the contact area between the glenoid base and the autologous bone. The angled position of the spike 51, with the tip gradually moving away from the connecting surface 11, allows for better insertion of the spike 51 into the autologous bone. This provides additional mechanical support even during the initial fixation of the glenoid base, reducing the risk of early micromotion and promoting osseointegration of the glenoid base.

[0044] In this embodiment, a plurality of barbs 51 are spaced on the connecting surface 11, and preferably 10 to 100 barbs 51 are provided. The length from the root to the tip of the barb 51 is preferably 0.5 mm to 5 mm. The distance between the tip of the barb 51 and the connecting surface 11 is preferably 0.1 mm to 3 mm.

[0045] As Figures 1 to 7 shown, when the deformable coupling member 30 is in the coupled state, the deformable coupling member 30 includes a first connecting section 31 located within the sleeve 40 and a second connecting section 32 extending outside the sleeve 40. The arrangement of the first connecting section 31 and the second connecting section 32 facilitates the processing of the deformable coupling member 30 and also facilitates the switching of the deformable coupling member 30 between the stored state and the coupled state. In the radial direction of the sleeve 40 from the inside to the outside, the second connecting section 32 gradually approaches the connecting surface 11. Such an arrangement enables the second connecting section 32 to be better inserted into the autologous bone, and the second connecting section 32 forms a barbed structure, which improves the connection strength between the deformable coupling member 30 and the autologous bone when the deformable coupling member 30 is in the coupled state. The length of the second connecting section 32 is L, and 0.1 mm ≤ L ≤ 10 mm. Designing the length of the second connecting section 32 of the deformable coupling member 30 within a reasonable range ensures that it can be properly inserted into the autologous bone when extending outside the sleeve 40, neither too shallow to cause insufficient connection nor too deep to damage the bone quality, thus finding a balance between mechanics and biocompatibility and ensuring a good bone integration effect.

[0046] In this embodiment, the length L of the second connecting section 32 is preferably 0.1 mm, 0.5 mm, 1 mm, 2 mm, 3 mm, 5 mm, 7 mm, 9 mm, 10 mm. When the deformable coupling member 30 is in the stored state, the first connecting section 31 is a bent structure. When the glenoid base is implanted, the temperature of the deformable coupling member 30 rises, causing the deformable coupling member 30 to switch to the coupled state, and the first connecting section 3,1 undergoes a stretching deformation, and the first connecting section 31 is an arc-shaped structure. When the deformable coupling member 30 is in the stored state and the coupled state, the second connecting section 32 is a barbed structure. The diameter of the second connecting section 32 gradually decreases in the direction away from the first connecting section 31, and the maximum diameter of the second connecting section 32 is 0.1 mm to 2.0 mm. The maximum diameter of the second connecting section 32 is the same as the diameter of the first connecting section 31.

[0047] In other embodiments, in the radial direction of the sleeve 40 from the inside to the outside, the second connecting section 32 gradually approaches the connecting surface 11. Alternatively, the length of the second connecting section 32 is L, and 0.1 mm ≤ L ≤ 10 mm.

[0048] As Figures 1 to 7As shown, the base plate 10 also includes a mounting surface 12 arranged opposite to the connecting surface 11 and a circumferential surface 13 connected between the connecting surface 11 and the mounting surface 12. The glenoid base also includes a deformable reinforcing spike 52 arranged on the circumferential surface 13. The deformable reinforcing spike 52 is deformed to have a retracted state and an inserted state. When the deformable reinforcing spike 52 is in the retracted state, the deformable reinforcing spike 52 extends along the circumference of the base plate 10. When the deformable reinforcing spike 52 is in the inserted state, it extends toward the connecting column 20. The provision of the deformable reinforcing spike 52 further increases the contact area between the glenoid base and the autologous bone. On the circumferential surface 13 of the base plate 10, the switching between the retracted state and the inserted state of the deformable reinforcing spike 52 improves the adaptability of the glenoid base and can provide stable fixation under different bone conditions.

[0049] In this embodiment, the deformable reinforcing thorn 52 includes a deformable section 521 and a reinforcing thorn section 522. The deformable section 521 is connected between the circumferential surface 13 and the reinforcing thorn section 522. The deformable section 521 can bend and deform when the temperature rises, allowing the reinforcing thorn section 522 to be inserted into the autologous bone, thereby improving the connection strength between the glenoid base and the autologous bone.

[0050] In this embodiment, when the deformable reinforcing spikes 52 are in the retracted state, they extend radially in the direction of the base plate 10. The deformation rate of the deformable reinforcing spikes 52 is slow, so that the deformable reinforcing spikes 52 are switched from the retracted state to the inserted state only after the sleeve 40 is in the avoidance state and the spikes 51 are inserted into the autologous bone.

[0051] like Figures 1 to 7 As shown, the deformable reinforcing thorn 52 and the deformable coupling 30 are made of a memory alloy. The use of the memory alloy not only ensures the shape recovery ability of the deformable coupling 30 and the deformable reinforcing thorn 52, but also improves the quality of bone integration due to its good biocompatibility and mechanical properties, and further enhances the stability and reliability of the glenoid base. The use of the memory alloy enables the deformable reinforcing thorn 52 to switch between the retracted state and the inserted state by changes in temperature. The use of the memory alloy enables the deformable coupling 30 to switch between the retracted state and the coupled state by changes in temperature.

[0052] In this embodiment, the deformation strengthening thorn 52 and the deformation coupling member 30 are both integrally formed parts. The mounting surface 12 is used for mounting the articular surface component or the glenoid head prosthesis. On both sides of the mounting surface 12 arranged oppositely, a first convex block 54 and a second convex block 55 are respectively arranged. On the side wall of the first convex block 54, a first fixing groove 541 is arranged, and on the side wall of the second convex block 55, a second fixing groove 551 is arranged. The first fixing groove 541 and the second fixing groove 551 are arranged oppositely. On the surface of the first convex block 54 facing away from the mounting surface 12, a guiding inclined surface 542 is arranged, and the guiding inclined surface 542 can guide the articular surface component into the first fixing groove 541. When mounting the articular surface component on the mounting surface 12, first insert one side of the articular surface component into the second fixing groove 551, and the other side of the articular surface component is in guiding cooperation with the guiding inclined surface 542 and the articular surface component is pressed, so that the other side of the articular surface component can enter the first fixing groove 541.

[0053] In other embodiments, the deformation strengthening thorn 52 or the deformation coupling member 30 is made of shape memory alloy.

[0054] As Figures 1 to 7 shown, the substrate 10 further includes a mounting surface 12 arranged oppositely to the connecting surface 11, and a first mounting hole 14 penetrating through the connecting surface 11 and the mounting surface 12 is arranged on the substrate 10. A second mounting hole 22 communicating with the first mounting hole 14 is arranged on the connecting column 20. The second mounting hole 22 penetrates through the surface of the connecting column 20 facing away from the substrate 10. The bottom of the sleeve 40 is provided with a bottom plate 53, and the bottom plate 53 covers the second mounting hole 22. The arrangement of the first mounting hole 14 and the second mounting hole 22 facilitates the connection between the glenoid base and other prosthesis components. The arrangement of the bottom plate 53 of the sleeve 40 can cover and block the second mounting hole 22 to reduce the growth of autologous bone into the second mounting hole 22 and affect the connection reliability between other prosthesis components and the second mounting hole 22. Moreover, the arrangement of the bottom plate 53 of the sleeve 40 can also improve the overall structural strength of the glenoid base.

[0055] In this embodiment, the first mounting hole 14 includes a counterbore and a first tapered hole communicating with the counterbore. The second mounting hole 22 includes a second tapered hole and a threaded hole. The tapered hole communicates with the threaded hole, and the threaded hole is located at one end of the tapered hole facing away from the substrate 10. A tapered rod inserted into the first mounting hole 14 and the second mounting hole 22 is arranged on the glenoid head prosthesis, and the tapered rod is in taper fit with both the first tapered hole and the second tapered hole. The glenoid head prosthesis and the glenoid base are connected by bolts. The bolts pass through the tapered rod and cooperate with the threaded hole, and the bolt heads are located in the counterbore. A porous structure layer is arranged on the surface of the bottom plate 53 facing away from the connecting column 20 to facilitate bone ingrowth and thereby improve the connection reliability between the glenoid base and autologous bone.

[0056] As Figures 1 to 7As shown, a first positioning member is provided on the sleeve 40, and a second positioning member is provided on the substrate 10. When the first positioning member and the second positioning member are in positioning cooperation, the sleeve 40 is in an avoidance state. The cooperation between the first positioning member and the second positioning member enables the operator to better perceive the switching of the sleeve 40 between the avoidance state and the occlusion state, making the switching of the sleeve 40 more precise, facilitating the sleeve 40 to be maintained in the avoidance state or the occlusion state, reducing the uncertainty in operation, improving the operation efficiency and safety, so as to achieve the best bone integration effect.

[0057] As Figures 1 to 7 shown, barbs 51 angled with the connection surface 11 are further provided on the connection surface 11. The barbs 51 have a root and a tip. A positioning groove is provided on the sleeve 40, and a first floating bead and a second floating bead are provided on the connection surface 11 at circumferential intervals along the sleeve 40. Both the first floating bead and the second floating bead are provided in a floating manner. When the positioning groove is in positioning cooperation with the first floating bead, the sleeve 40 is in an avoidance state. When the second floating bead is in positioning cooperation with the positioning groove, the sleeve 40 is in an occlusion state. On the connection surface 11, a directed line segment from the center of the first floating bead to the center of the second floating bead is defined as the first vector, and a directed line segment from the center of the root to the tip is defined as the second vector. The first vector and the second vector form a vector angle X, where 0° ≤ X ≤ 60°. The magnitude of the first vector is A, and the magnitude of the second vector is B, where -5 mm ≤ A - B ≤ 5 mm. The combined use of the barbs 51, the sleeve 40, the positioning groove, the first floating bead, and the second floating bead optimizes the position control of the sleeve 40 by adjusting the angle and magnitude of the first vector and the second vector, ensuring the accuracy and reliability of the deformed coupling member 30 during implantation. By controlling the vector angle X formed by the first vector and the second vector, when the sleeve 40 switches from the occlusion state to the avoidance state, the barbs 51 can penetrate into the autologous bone to complete the combination of the barbs 51 and the autologous bone. By controlling the difference between the magnitude of the first vector and the magnitude of the second vector, when the sleeve 40 switches from the occlusion state to the avoidance state, the length of the barbs 51 penetrating into the autologous bone is controllable, ensuring that the barbs 51 can penetrate appropriately into the autologous bone, neither too shallow to cause insufficient connection nor too deep to damage the bone quality, thus finding a balance between mechanics and biocompatibility and ensuring a good bone integration effect.

[0058] In this embodiment, in the direction from the root to the tip, the barbs 51 gradually move away from the connection surface 11. When the sleeve 40 is tightened on the connecting column 20, the positioning groove is in positioning cooperation with the first floating bead.

[0059] In other embodiments, the first vector and the second vector form a vector angle X, where 0° ≤ X ≤ 60°. Alternatively, the magnitude of the first vector is A, and the magnitude of the second vector is B, where -5 mm ≤ A - B ≤ 5 mm.

[0060] The present application also provides a shoulder joint prosthesis, which includes a glenoid base, and the glenoid base is the above-mentioned glenoid base. Since the above-mentioned glenoid base can solve the problem of poor connection reliability between the glenoid base in the related art and the autologous bone, the shoulder joint prosthesis with this glenoid base can solve the same technical problem.

[0061] In this embodiment, connection holes 15 are provided on the substrate 10. The connection holes 15 include an avoidance section and a locking section. The fixing nail passes through the avoidance section to connect the substrate 10 with the autologous bone, and the nail head of the fixing nail is located within the avoidance section. An anti-backout nail is used to be fixed within the locking section, and internal screws are provided on the inner wall of the locking section to reduce the possibility of fatigue loosening of the fixing nail.

[0062] In this embodiment, the glenoid base can be used in reverse shoulder joint prostheses and anatomical shoulder joint prostheses. When the shoulder joint prosthesis is a reverse shoulder joint prosthesis, the shoulder joint prosthesis further includes a glenoid head prosthesis, and the glenoid head prosthesis is connected to the glenoid base. When the shoulder joint prosthesis is an anatomical shoulder joint prosthesis, the shoulder joint prosthesis further includes an articular surface component, and the articular surface component is arranged on the mounting surface 12.

[0063] The inventors found that complex injuries and diseases such as proximal humeral comminuted fractures, late shoulder arthritis, humeral head necrosis, and rotator cuff arthropathy are common shoulder joint diseases clinically. The shoulder joint pain and limited mobility caused by these diseases have an adverse impact on the lives of patients. At present, shoulder joint replacement is an effective treatment method clinically, which greatly improves the function of the shoulder joint and relieves the pain of patients. Although shoulder joint replacement treats complex shoulders, the clinical efficacy of joint diseases is good. Complications that occur after shoulder joint replacement, such as prosthesis loosening, joint instability, and periprosthetic fractures, are still the main problems faced by shoulder joint replacement. Among them, prosthesis loosening is the most common complication after shoulder joint replacement, directly affecting the success or failure of the surgery and the retention time of the shoulder joint prosthesis in the body. It is generally believed that nearly 30% of shoulder joint revision cases are caused by loosening of the glenoid prosthesis. The loosening of the glenoid prosthesis in the shoulder joint prosthesis system accounts for the vast majority, and the loosening rate is higher than that of the humeral side prosthesis. The main reason for the loosening of the joint prosthesis is that the load borne by the prosthesis fixation interface exceeds the bonding strength of the interface.

[0064] Applying the technical solution of this embodiment, the glenoid base can effectively strengthen the bonding strength of the glenoid prosthesis fixation interface, thereby reducing the incidence of loosening of the glenoid prosthesis.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0066] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used here will be made.

[0067] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0068] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A glenoid base, characterized in that, Comprising: A substrate (10), including a connection surface (11); A connection post (20) disposed on the connection surface (11), and a receiving groove (21) is provided on the connection post (20); A deformable coupling member (30) connected to the connection post (20) and located at the receiving groove (21), the deformable coupling member (30) deforms to have a received state located within the receiving groove (21) and a coupled state extending out of the connection post (20); A sleeve (40) sleeved outside the connection post (20), the sleeve (40) is rotatable relative to the connection post (20), an avoidance hole (41) is provided on the sleeve (40), and the sleeve (40) rotates to have a shielding state covering the mouth of the receiving groove (21) and an avoidance state communicating the avoidance hole (41) with the receiving groove (21).

2. The glenoid fossa base according to claim 1, wherein Internal threads are provided on the inner side wall of the sleeve (40), and external threads capable of being threadedly engaged with the internal threads are provided on the outer side wall of the connection post (20); and / or, The mouth of the receiving groove (21) penetrates the side wall of the connection post (20), there are a plurality of the deformable coupling members (30), and the plurality of deformable coupling members (30) are spaced apart and disposed within the receiving groove (21), there are a plurality of the avoidance holes (41), and the plurality of avoidance holes (41) are provided in one-to-one correspondence with the plurality of deformable coupling members (30).

3. The glenoid base according to claim 1, characterized in that, Spikes (51) angled with the connection surface (11) are further provided on the connection surface (11), the spikes (51) have a root and a tip, and in the direction from the root to the tip, the spikes (51) gradually move away from the connection surface (11).

4. The glenoid base according to claim 1, characterized in that, When the deformable coupling member (30) is in the coupled state, the deformable coupling member (30) includes a first connection segment (31) located within the sleeve (40) and a second connection segment (32) extending out of the sleeve (40); In the radial direction of the sleeve (40) from the inside to the outside, the second connection segment (32) gradually approaches the connection surface (11); and / or, The length of the second connection segment (3 5. The glenoid base according to claim 1, characterized in that, ​ ​ 6. The glenoid base according to claim 5, characterized in that, ​ 7. The glenoid base according to claim 1, characterized in that, The substrate (10) further includes a mounting surface (12) disposed opposite to the connection surface (11). A first mounting hole (14) penetrating through the connection surface (11) and the mounting surface (12) is provided on the substrate (10). A second mounting hole (22) communicating with the first mounting hole (14) is provided on the connection column (20). The second mounting hole (22) penetrates through the surface of the connection column (20) facing away from the substrate (10). A bottom plate (53) is provided at the bottom of the sleeve (40), and the bottom plate (53) covers the second mounting hole (22).

8. The glenoid base according to claim 1, characterized in that, A first positioning member is provided on the sleeve (40), and a second positioning member is provided on the substrate (10). When the first positioning member and the second positioning member are in positioning cooperation, the sleeve (40) is in the avoidance state.

9. The glenoid base according to claim 1, wherein Spikes (51) angled with respect to the connection surface (11) are further provided on the connection surface (11). The spikes (51) have a root and a tip; a positioning groove is provided on the sleeve (40), and a first floating bead and a second floating bead are provided on the connection surface (11) at circumferential intervals along the sleeve (40). Both the first floating bead and the second floating bead are provided in a floating manner; when the positioning groove is in positioning cooperation with the first floating bead, the sleeve (40) is in the avoidance state; when the second floating bead is in positioning cooperation with the positioning groove, the sleeve (40) is in the blocking state; On the connection surface (11), a directed line segment pointing from the center of the first floating bead to the center of the second floating bead is defined as a first vector, and a directed line segment pointing from the center of the root to the center of the tip is defined as a second vector; An included angle X is formed between the first vector and the second vector, and 0° ≤ X ≤ 60°; and / or The modulus of the first vector is A, and the modulus of the second vector is B, and -5 mm ≤ A - B ≤ 5 mm.

10. A shoulder joint prosthesis, comprising a glenoid base, characterized in that, The glenoid base is the glenoid base according to any one of claims 1 to 9.

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