Iliac prosthesis

Abstract

This invention provides an iliac bone prosthesis, comprising: a first base; a second base movably disposed on the first base along the stacking direction of the first and second bases; and an operating mechanism including a first operating member, a transmission member, and an anti-rotation part. The first operating member is disposed on the first base, and the first operating member and the transmission member are movably connected. The transmission member is disposed on the second base and driven by the first operating member. The anti-rotation part restricts the rotation of the second base relative to the first base. The first operating member can drive the second base to move via the transmission member. One of the second base and the first base is used for connection to the sacrum, and the other of the second base and the first base is used for connection to an acetabular cup prosthesis. The technical solution of this application effectively solves the problem of fixing the external dimensions of the iliac bone prosthesis.

Description

Technical Field

[0001] This invention relates to the field of iliac bone prosthesis technology, and more specifically, to an iliac bone prosthesis. Background Technology

[0002] Iliac bone prostheses can be used for postoperative reconstruction of the pelvic region, primarily to replace bone structures that need to be removed due to disease (such as tumors) or trauma. The ilium is one of the important bones constituting the pelvis; it connects to the spine, supports the femur via the acetabulum, and forms a stable pelvic ring with the pubis and ischium. When a portion of the ilium is removed, iliac bone prostheses can be used for reconstruction, restoring the structural integrity of the pelvis and ensuring that the body's weight-bearing capacity and motor function are not severely affected.

[0003] In this technique, the iliac bone prosthesis connects the sacrum and the acetabular cup, the position of which is crucial for restoring normal biomechanical function of the hip joint. Improper acetabular cup positioning can lead to joint dysfunction, such as hip instability, dislocation, or abnormal load distribution, increasing the risk of postoperative complications such as pain, limited mobility, and the potential need for corrective surgery. Therefore, the iliac bone prosthesis is necessary. The iliac bone prosthesis has a fixed shape. Summary of the Invention

[0004] The main objective of this invention is to provide an iliac bone prosthesis to solve the problem of fixed external dimensions of iliac bone prostheses in related technologies.

[0005] To achieve the above objectives, the present invention provides an iliac bone prosthesis, comprising: a first base; a second base movably disposed on the first base along the stacking direction of the first base and the second base; an operating mechanism, the operating mechanism comprising a first operating member, a transmission member, and an anti-rotation part, the first operating member being disposed on the first base, the first operating member and the transmission member being movably connected, the transmission member being disposed on the second base and driven by the first operating member, the anti-rotation part restricting the second base from rotating relative to the first base, and the first operating member being able to drive the second base to move via the transmission member; wherein, one of the second base and the first base is used for connection with the sacrum, and the other of the second base and the first base is used for connection with an acetabular cup prosthesis.

[0006] Furthermore, the operating mechanism also includes a first spiral lifting part, the first operating member includes a first operating ring, the first operating ring is rotatably disposed on the first base, and the position of the first operating ring along the stacking direction of the first base and the second base remains unchanged, the transmission member includes a transmission rod, one end of the transmission rod is disposed on the second base, and the first spiral lifting part is disposed between the first operating ring and the transmission rod.

[0007] Furthermore, the first operating component also includes a first rotating ring disposed at one end of the first operating ring near the first base, the first base being provided with a rotating groove, and the first rotating ring being rotatably disposed within the rotating groove.

[0008] Furthermore, the anti-rotation part includes a second rotating ring and a mating component. The second rotating ring is disposed on the first base and has a guide hole. One end of the mating component passes through the guide hole, and the other end of the mating component is connected to the second base. The second rotating ring and the first operating component are spaced apart.

[0009] Furthermore, the second rotating ring is rotatably disposed on the first base, and the operating mechanism also includes a second spiral lifting part disposed between the guide hole and the mating part. The operating mechanism also includes a second operating member, a first tooth, a second tooth, and a third tooth. The second operating member is rotatably disposed on the first base, and the first operating member and the second rotating ring are arranged around the outer periphery of the second operating member. The first tooth is disposed around the outer periphery of the first operating member, the second tooth is disposed around the outer periphery of the second operating member, and the third tooth is disposed around the outer periphery of the second rotating ring. The second tooth meshes with both the first tooth and the third tooth.

[0010] Furthermore, the operating mechanism also includes an operating lever, which is mounted on the second operating member. The second base and / or the first base are provided with clearance holes for the operating lever.

[0011] Furthermore, the iliac bone prosthesis also includes a stop structure, which is movably disposed between the first base and the second base along the radial direction of the second operating member. The stop structure has a stop state and a clearance state. When the stop structure is in the stop state, the stop structure abuts against the second tooth to restrict the rotation of the second operating member. When the stop structure is in the clearance state, the stop structure separates from the second tooth.

[0012] Furthermore, the iliac bone prosthesis also includes a first fixing nut and a second fixing nut. The first fixing nut is located on the side of the first base away from the second base, and the second fixing nut is located on the side of the second base away from the first base. The first fixing nut and the second fixing nut are respectively threaded to both ends of the operating rod. The first fixing nut and the second fixing nut have a fixed state and a separated state. When the first fixing nut and the second fixing nut are in the fixed state, the first fixing nut abuts against the first base, and the second fixing nut abuts against the second base. When the first fixing nut and the second fixing nut are in the separated state, the first fixing nut is separated from the first base, and / or the second fixing nut is separated from the second base.

[0013] Furthermore, the second base is connected to the sacrum, and the iliac bone prosthesis also includes a third base and a locking structure. The acetabular cup prosthesis is connected to the first base through the third base. The third base is rotatably mounted on the first base, and the rotation axis of the third base is perpendicular to the stacking direction of the first and second bases. The locking structure has a locked state and an unlocked state. When the locking structure is in the locked state, the angle between the first base and the third base remains unchanged. When the locking structure is in the unlocked state, the angle between the first base and the third base can be changed.

[0014] Furthermore, the iliac bone prosthesis also includes a connecting shaft, which is fixedly mounted on the first base. A third base is rotatably mounted on the connecting shaft, with the axis of rotation of the third base being the axis of the connecting shaft. The locking structure includes a locking block and an operating stud. The operating stud is threadedly engaged with the third base. The first end of the operating stud is rotatably mounted on the locking block, and the second end of the operating stud is the operating end. The locking block is movably mounted on the third base and located on the side of the third base closer to the first base. When the locking structure is in the locked state, the locking block abuts against the connecting shaft. When the locking structure is in the unlocked state, the locking block separates from the connecting shaft.

[0015] The iliac bone prosthesis of this invention includes a first base, a second base, and an operating mechanism. The second base is movable on the first base, allowing the dimensions of the iliac bone prosthesis to change in the stacking direction of the first and second bases. This enables adjustment of the distance between the first and second bases according to the installation position of the acetabular cup prosthesis, making the iliac bone prosthesis adaptable to different patients, thus improving its versatility. A first operating component drives a transmission component, which in turn drives the second base to move. One of the second and first bases is used for connection to the sacrum, and the other is used for connection to the acetabular cup prosthesis, allowing the iliac bone prosthesis to connect with both the sacrum and the acetabular cup prosthesis. An anti-rotation component prevents the second base from rotating relative to the first base, facilitating movement of the second base relative to the first base along the stacking direction of the first and second bases. Therefore, the technical solution of this application effectively solves the problem of fixing the external dimensions of the iliac bone prosthesis. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the iliac bone prosthesis according to the present invention is shown;

[0018] Figure 2 It shows Figure 1A three-dimensional structural diagram showing the connection between the first, second, and third bases of the iliac bone prosthesis;

[0019] Figure 3 It shows Figure 2 A cross-sectional schematic diagram of the iliac bone prosthesis;

[0020] Figure 4 It shows Figure 2 A schematic diagram of the exploded structure of the iliac bone prosthesis;

[0021] Figure 5 It shows Figure 4 A three-dimensional structural diagram of the iliac bone prosthesis from another perspective;

[0022] Figure 6 A three-dimensional structural schematic diagram of an embodiment of a hemipelvic prosthesis according to the present invention is shown;

[0023] Figure 7 It shows Figure 6 A magnified view of part A of the hemipelvic prosthesis;

[0024] Figure 8 It shows Figure 6 A three-dimensional structural diagram of a hemipelvic prosthesis from another perspective.

[0025] The above figures include the following reference numerals:

[0026] 1. Sacrum; 2. Hip bone; 10. First base; 11. Rotating groove; 12. First seat body; 13. Second seat body; 20. Second base; 21. Clearance hole; 30. Operating mechanism; 31. First operating component; 311. First operating ring; 312. First rotating ring; 32. Transmission component; 321. Transmission rod; 33. Anti-rotation part; 331. Second rotating ring; 3311. Guide hole; 332. Fitting component; 34. Second operating component; 35. Operating rod; 40. Stop structure; 50. Third base; 60. Locking structure; 61. Locking block; 62. Operating stud; 70. Connecting shaft; 80. First fixing nut; 90. Second fixing nut; 100. Sacral connecting structure; 101. Connecting plate; 102. Connecting cylinder; 200. Acetabular cup prosthesis; 210. Connecting column. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] like Figure 1 , Figure 2 as well as Figure 5As shown, the iliac bone prosthesis of this embodiment includes a first base 10, a second base 20, and an operating mechanism 30. The second base 20 is movably disposed on the first base 10 along the stacking direction of the first base 10 and the second base 20. The operating mechanism 30 includes a first operating member 31, a transmission member 32, and an anti-rotation part 33. The first operating member 31 is disposed on the first base 10, and the first operating member 31 and the transmission member 32 are movably connected. The transmission member 32 is disposed on the second base 20 and is driven by the first operating member 31. The anti-rotation part 33 restricts the second base 20 from rotating relative to the first base 10. The first operating member 31 can drive the second base 20 to move through the transmission member 32. One of the second base 20 and the first base 10 is used to connect to the sacrum 1, and the other of the second base 20 and the first base 10 is used to connect to the acetabular cup prosthesis 200.

[0031] Using the technical solution of this embodiment, the iliac bone prosthesis includes a first base 10, a second base 20, and an operating mechanism 30. The second base 20 is movable on the first base 10, allowing the dimensions of the iliac bone prosthesis in the stacking direction of the first base 10 and the second base 20 to be changed. This allows the distance between the first base 10 and the second base 20 to be adjusted according to the installation position of the acetabular cup prosthesis, making the iliac bone prosthesis adaptable to different patients, i.e., improving the versatility of the iliac bone prosthesis. The first operating member 31 can drive the transmission member 32 to move, and the transmission member 32 can then drive the second base 20 to move. One of the second base 20 and the first base 10 is used to connect to the sacrum 1, and the other of the second base 20 and the first base 10 is used to connect to the acetabular cup prosthesis 200, thus enabling the iliac bone prosthesis to connect to both the sacrum 1 and the acetabular cup prosthesis 200. The anti-rotation part 33 is provided to prevent the second base 20 from rotating relative to the first base 10, and to facilitate the movement of the second base 20 relative to the first base 10 along the stacking direction of the first base 10 and the second base 20. Therefore, the technical solution of this embodiment effectively solves the problem of fixing the external dimensions of the iliac bone prosthesis.

[0032] It should be noted that when the second base 20 moves relative to the first base 10 along the stacking direction of the first base 10 and the second base 20, the second base 20 can move closer to the first base 10 or away from the first base 10.

[0033] like Figure 4 and Figure 5As shown, in this embodiment, the operating mechanism 30 further includes a first spiral lifting part, and the first operating member 31 includes a first operating ring 311, which is rotatably disposed on the first base 10. The position of the first operating ring 311 along the stacking direction of the first base 10 and the second base 20 remains unchanged. The transmission member 32 includes a transmission rod 321, one end of which is disposed on the second base 20. The first spiral lifting part is disposed between the first operating ring 311 and the transmission rod 321. The first operating ring 311 can rotate on the first base 10, and thus the first operating ring 311 can drive the transmission rod 321 to move along the stacking direction of the first base 10 and the second base 20 through the first spiral lifting part. Consequently, the transmission rod 321 can drive the second base 20 to move along the stacking direction of the first base 10 and the second base 20. The position of the first operating ring 311 along the stacking direction of the first base 10 and the second base 20 remains unchanged, so that the first operating ring 311 moves relative to the first base 10 in the stacking direction of the first base 10 and the second base 20.

[0034] It should be noted that the first spiral lifting part can be a thread, a spiral groove, or a sliding rod, with the sliding rod sliding within the spiral groove.

[0035] like Figures 2 to 4 As shown, in this embodiment, the first operating member 31 further includes a first rotating ring 312 disposed at one end of the first operating ring 311 near the first base 10. The first base 10 is provided with a rotating groove 11, and the first rotating ring 312 is rotatably disposed within the rotating groove 11. The first rotating ring 312 can rotate within the rotating groove 11, which facilitates the rotation of the first operating ring 311 relative to the first base 10.

[0036] It should be noted that a bearing may or may not be provided between the first rotating ring 312 and the groove wall of the rotating groove 11, and the side wall of the first rotating ring 312 and the side wall of the rotating groove 11 are in sliding fit.

[0037] like Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the anti-rotation part 33 includes a second rotating ring 331 and a mating member 332. The second rotating ring 331 is disposed on the first base 10 and has a guide hole 3311. One end of the mating member 332 passes through the guide hole 3311, and the other end of the mating member 332 is connected to the second base 20. The second rotating ring 331 and the first operating member 31 are spaced apart. Through the engagement of the guide hole 3311 and the mating member 332, when the second base 20 moves relative to the first base 10, no relative rotation occurs between the second base 20 and the first base 10.

[0038] It should be noted that the second rotating ring 331 and the first operating member 31 are spaced apart, wherein the spaced apart means that the axis of the second rotating ring 331 and the axis of the first operating member 31 do not coincide.

[0039] It should be noted that the anti-rotation part 33 refers to preventing relative rotation between the first base 10 and the second base 20, not preventing relative rotation between the second rotating ring 331 and the mating part 332.

[0040] like Figures 3 to 5 As shown, in this embodiment, the second rotating ring 331 is rotatably disposed on the first base 10. The operating mechanism 30 also includes a second spiral lifting part, which is disposed between the guide hole 3311 and the mating part 332. The operating mechanism 30 also includes a second operating member 34, a first tooth, a second tooth, and a third tooth. The second operating member 34 is rotatably disposed on the first base 10. The first operating member 31 and the second rotating ring 331 are disposed around the outer periphery of the second operating member 34. The first tooth is disposed around the outer periphery of the first operating member 31, the second tooth is disposed around the outer periphery of the second operating member 34, and the third tooth is disposed around the outer periphery of the second rotating ring 331. The second tooth meshes with both the first tooth and the third tooth. When the second rotating ring 331 rotates, it can drive the mating member 332 to move in the stacking direction of the first base 10 and the second base 20 through the second spiral lifting part. This allows the mating member 332 to drive the second base 20 to move relative to the first base 10. In other words, by providing the second rotating ring 331 and the mating member 332, not only can the rotation of the second base 20 relative to the first base 10 be prevented, but also the movement of the second base 20 relative to the first base 10 can be promoted. When the second operating member 34 rotates, it can drive the first operating member 31 and the second rotating ring 331 to rotate through the engagement of the second tooth with the first tooth and the engagement of the second tooth with the third tooth.

[0041] It should be noted that the second spiral lifting part has the same structure as the first spiral lifting part.

[0042] It should be noted that the first operating element 31 includes multiple first operating elements 31, and the multiple first operating elements 31 and the second rotating ring 331 are spaced apart in the circumferential direction of the second operating element 34.

[0043] It should be noted that there are multiple first teeth, second teeth, and third teeth.

[0044] Specifically, the first operating member 31, the second rotating ring 331, and the second operating member 34 have the same structure, but their dimensions may be different. Multiple rotating grooves 11 are included, with each first operating member 31 corresponding to one rotating groove 11, each second rotating ring 331 corresponding to one rotating groove 11, and each second operating member 34 corresponding to one rotating groove 11.

[0045] like Figures 2 to 4 As shown, in this embodiment, the operating mechanism 30 further includes an operating lever 35, which is disposed on the second operating member 34. The second base 20 is provided with a clearance hole 21 for accommodating the operating lever 35. The clearance hole 21 facilitates the end of the operating lever 35 to extend out of the first base 10, thereby facilitating the rotation of the operating lever 35 by driving it through the end of the operating lever 35.

[0046] Specifically, the clearance hole 21 penetrates the second base 20 in the thickness direction.

[0047] It should be noted that the first base 10 is also provided with a clearance hole, which avoids the operating rod 35. The clearance hole on the first base 10 penetrates the first base 10 in the thickness direction.

[0048] like Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the iliac bone prosthesis further includes a stop structure 40. The stop structure 40 is movably disposed between the first base 10 and the second base 20 along the radial direction of the second operating member 34. The stop structure 40 has a stop state and a avoidance state. When the stop structure 40 is in the stop state, it abuts against the second tooth to restrict the rotation of the second operating member 34. When the stop structure 40 is in the avoidance state, it separates from the second tooth. The stop structure 40 can move along the radial direction of the second operating member 34, that is, the stop structure 40 can switch between the stop state and the avoidance state, thereby causing the second operating member 34 to rotate or remain stationary relative to the first base 10.

[0049] It should be noted that the stop structure 40 is located on the side of the first base 10 near the second base 20.

[0050] The stop structure 40 includes a stop block and an adjusting stud disposed at the end of the stop block away from the second operating member. The adjusting stud is rotatably disposed on the first base 10, and the stop block is movably disposed on the first base 10 and engages with the first base 10 to prevent rotation; that is, the side of the stop block near the first base 10 is in contact with the side of the first base 10 near the stop block. The end of the stop block away from the adjusting stud is a pointed tip. When the stop structure 40 is in the stopped state, the pointed tip inserts into two adjacent second teeth.

[0051] like Figure 2 , Figure 4 as well as Figure 5As shown, in this embodiment, the second base 20 is connected to the sacrum 1. The iliac bone prosthesis also includes a third base 50 and a locking structure 60. The acetabular cup prosthesis 200 is connected to the first base 10 via the third base 50. The third base 50 is rotatably mounted on the first base 10, and the rotation axis of the third base 50 is perpendicular to the stacking direction of the first base 10 and the second base 20. The locking structure 60 has a locked state and an unlocked state. When the locking structure 60 is in the locked state, the angle between the first base 10 and the third base 50 remains unchanged. When the locking structure 60 is in the unlocked state, the angle between the first base 10 and the third base 50 can be changed. The third base 50 can rotate relative to the first base 10, which allows the position of the third base 50 relative to the first base 10 to be adjusted according to the installation position of the acetabular cup prosthesis 200, facilitating the installation of the acetabular cup prosthesis 200 to the desired position.

[0052] It should be noted that the first base 10 is connected to the acetabular cup prosthesis via the third base 50.

[0053] like Figure 2 , Figure 4 as well as Figure 5 As shown, in this embodiment, the iliac bone prosthesis also includes a connecting shaft 70, which is fixedly mounted on the first base 10. A third base 50 is rotatably mounted on the connecting shaft 70, with the axis of rotation of the third base 50 being the axis of the connecting shaft 70. The locking structure 60 includes a locking block 61 and an operating stud 62. The operating stud 62 is threadedly engaged with the third base 50. The first end of the operating stud 62 is rotatably mounted on the locking block 61, and the second end is the operating end. The locking block 61 is movably mounted on the third base 50 and located on the side of the third base 50 closest to the first base 10. When the locking structure 60 is in the locked state, the locking block 61 abuts against the connecting shaft 70; when the locking structure 60 is in the unlocked state, the locking block 61 separates from the connecting shaft 70. The third base 50 can be connected to the first base 10 via the connecting shaft 70. The operating stud 62 can rotate on the third base 50, and since the locking block 61 is movably disposed on the third base 50 and the first end of the operating stud 62 is rotatably disposed on the locking block 61, the operating stud 62 can drive the locking block 61 to move toward or away from the connecting shaft 70, thereby enabling the locking structure 60 to switch between the locked state and the unlocked state.

[0054] Specifically, multiple protrusions are arranged around the outer surface of the connecting shaft 70, and multiple recesses are arranged on the side of the locking block 61 near the connecting shaft 70. When the locking structure 60 is in the locked state, the protrusions are located in the recesses, which can prevent the third base 50 from rotating relative to the first base 10.

[0055] It should be noted that the first base 10 includes a first seat body 12 and a second seat body 13. The second seat body 13 is rotatably mounted on the first seat body 12, and the axis of rotation of the second seat body 13 is parallel to the stacking direction of the first base 10 and the second base 20. The acetabular cup prosthesis 200 is connected to the second seat body 13. This allows the relative position of the second base 20 and the first seat body 12 to be adjusted according to the installation position of the acetabular cup prosthesis 200.

[0056] The connecting shaft 70 is fixedly mounted on the second base 13.

[0057] The second seat 13 has an inner hole, and the inner hole and the outer peripheral surface of the first seat 12 are connected by a thread.

[0058] The rotating groove 11 is provided on the first base 12.

[0059] Part of the clearance hole on the first base 10 is located on the first base body, and the other part is located on the second base body.

[0060] The first base 10 also includes a first ear plate disposed on the first base body 12, and a second ear plate disposed on the third base 50. The connecting shaft 70 passes through the first ear plate and the second ear plate.

[0061] Both the first and second ear plates consist of two plates spaced apart.

[0062] It should be noted that the iliac bone prosthesis also includes a first fixing nut 80 and a second fixing nut 90. The first fixing nut 80 is located on the side of the first base 10 away from the second base 20, and the second fixing nut 90 is located on the side of the second base 20 away from the first base 10. The first fixing nut 80 and the second fixing nut 90 are respectively threaded into both ends of the operating rod 35. The first fixing nut 80 and the second fixing nut 90 have a fixed state and a separated state. Specifically, when the first fixing nut 80 and the second fixing nut 90 are in the fixed state, the first fixing nut 80 abuts against the first base 10, and the second fixing nut 90 abuts against the second base 20. When the first fixing nut 80 and the second fixing nut 90 are in the separated state, the first fixing nut 80 is separated from the first base 10, and the second fixing nut 90 is separated from the second base 20. The first fixing nut 80 and the second fixing nut 90 are respectively threaded onto both ends of the operating rod 35. This facilitates the movement of the first fixing nut 80 on the operating rod 35 and the movement of the second fixing nut 90 on the operating rod, thereby facilitating the switching between a fixed state and a disengaged state for the first fixing nut 80 and the second fixing nut 90. When the first fixing nut 80 and the second fixing nut 90 are in the fixed state, the relative position between the first base and the second base remains unchanged. When the first fixing nut 80 and the second fixing nut 90 are in the disengaged state, the relative position between the first base and the second base can change.

[0063] It should be noted that when the first fixing nut 80 and the second fixing nut 90 are in the fixed state, the first fixing nut 80 abuts against the second base 13.

[0064] Specifically, since the second seat 13 can rotate relative to the first seat 12, the first fixing nut 80 and the second fixing nut 90 are provided. After the second seat 13 rotates relative to the first seat 12, the first fixing nut 80 can move until it abuts against the second seat 13, and the second fixing nut 90 can move until it abuts against the second base 20. In this way, under the action of the first fixing nut 80, the operating rod 35, the second base 20, the first seat 12, and the second fixing nut 90, the relative positions of the first seat 12 and the second seat 13 are fixed.

[0065] It should be noted that the iliac bone prosthesis also includes a sacral connection structure 100, which connects the second base 20 and the sacrum 1.

[0066] The sacral connection structure 100 includes a connecting plate 101 and a connecting cylinder 102. The connecting plate 101 is disposed at the first end of the connecting cylinder 102, and the second base 20 is disposed on the connecting cylinder 102. The connecting plate 101 has multiple protrusions on the side facing the sacrum 1, which abut against the sacrum 1. This increases the friction between the connecting plate 101 and the sacrum, reduces relative movement between them, and makes the relative position between the connecting plate 101 and the sacrum 1 more stable. The connecting plate 101 and the sacrum 1 are connected by screws.

[0067] The outer peripheral surface of the second base 20 is fitted against the inner wall of the connecting cylinder 102. A positioning groove is provided on the inner wall of the connecting cylinder 102, and a positioning block is provided on the outer peripheral surface of the second base 20. The positioning groove and the positioning block are interlocked to fix the relative positions of the second base 20 and the connecting cylinder 102 in the stacking direction of the first base 10 and the second base 20. The positioning block and the positioning groove also prevent relative rotation between the second base 20 and the connecting cylinder 102.

[0068] The second base 20 and the connecting cylinder 102 can be connected by welding or by bolts. The bolts pass through the positioning groove and are screwed into the positioning block. Alternatively, an external thread can be provided on the outer surface of the second base 20 and an internal thread can be provided on the inner surface of the connecting cylinder 102, so that the second base 20 and the connecting cylinder 102 are threadedly connected.

[0069] It should be noted that the second base 20 is connected to the sacrum 1 via the sacral connecting structure 100. Specifically, the relative positions of the second base 20 and the connecting cylinder 102 in the stacking direction of the first base 10 and the second base 20 can be fixed through the positioning block and the positioning groove. This allows the relative positions of the first base 10 and the connecting cylinder 102 in the stacking direction of the first base 10 and the second base 20 to be changed after the positions of the first base 10 and the second base 20 are adjusted, thereby facilitating the connection of the third base 50 to the acetabular cup prosthesis 200.

[0070] It should be noted that the iliac bone prosthesis also includes a flexible sleeve. One end of the flexible sleeve is fitted around the periphery of the sacral connecting structure 100, and the other end is fitted around the periphery of the third base 50. This prevents bone structures from growing into the space between the first base 10 and the third base 50.

[0071] In this embodiment, during implantation of the iliac bone prosthesis, firstly, the relative position between the first base 10 and the second base 20 is adjusted. That is, the first fixing nut 80 and the second fixing nut 90 are switched to the separated state. Then, the operating lever 35 drives the second operating member 34 to rotate, and the second operating member 34 drives the first operating member 31 to rotate. In turn, the first operating member 31 drives the second base 20 to move relative to the first base 10 through the transmission member 32, thereby adjusting the relative position between the first base 10 and the second base 20. Secondly, the second base 13 is rotated relative to the first base 12. When the second base 13 rotates, it can drive the third base 50 to rotate through the connecting shaft 70. When the third base 50 rotates to the desired position, the first fixing nut 80 and the second fixing nut 90 are switched to the fixed state, and then the locking structure 60 is switched to the unlocked state. The third base 50 is then rotated relative to the first base 10 until the third base 50 rotates to the desired position, and then the locking structure 60 is switched to the locked state. Finally, the first base 10 is connected to the sacral connection structure 100, and the third base 50 is connected to the acetabular cup prosthesis 200.

[0072] like Figures 6 to 8 As shown, the hemipelvic prosthesis of this embodiment includes an iliac bone prosthesis and an acetabular cup prosthesis 200. The iliac bone prosthesis is the one described above, and the acetabular cup prosthesis 200 is connected to a first base 10 or a second base 20 of the iliac bone prosthesis. The distance between the first base and the second base of the iliac bone structure described above is adjustable, facilitating adjustment of the distance between the first base and the second base according to the installation position of the acetabular cup prosthesis. The hemipelvic prosthesis with the iliac bone prosthesis described above also has the aforementioned advantages.

[0073] The acetabular cup prosthesis 200 includes an acetabular cup and a connecting seat disposed on the acetabular cup, the connecting seat being connected to a third base.

[0074] The axis of the connecting seat may or may not coincide with the axis of the acetabular cup.

[0075] The connecting seat includes a connecting rod and a fourth base, with the connecting rod connecting between the fourth base and the acetabular cup. The fourth base is connected to the third base.

[0076] The iliac bone prosthesis and acetabular cup prosthesis 200 can replace the function of one hip bone. The hemipelvic prosthesis also includes a connecting post 210, which connects the acetabular cup and another hip bone 2.

[0077] It should be noted that multiple mounting holes are provided at intervals in the circumferential direction of the acetabular cup. The connecting post 210 is selectively associated with one of the multiple mounting holes, so that the screw can pass through the mounting hole to connect the connecting post 210 and the acetabular cup.

[0078] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0079] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0080] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An iliac bone prosthesis, characterized in that, include: First base (10); The second base (20) is movably disposed on the first base (10) along the stacking direction of the first base (10) and the second base (20); The operating mechanism (30) includes a first operating member (31), a transmission member (32), and an anti-rotation part (33). The first operating member (31) is disposed on the first base (10). The first operating member (31) and the transmission member (32) are movably connected. The transmission member (32) is disposed on the second base (20) and is driven by the first operating member (31). The anti-rotation part (33) restricts the second base (20) from rotating relative to the first base (10). The first operating member (31) can drive the second base (20) to move through the transmission member (32). One of the second base (20) and the first base (10) is used to connect to the sacrum (1), and the other of the second base (20) and the first base (10) is used to connect to the acetabular cup prosthesis (200); The anti-rotation part (33) includes a second rotating ring (331) and a mating part (332). The second rotating ring (331) is disposed on the first base (10). The second rotating ring (331) is provided with a guide hole (3311). One end of the mating part (332) passes through the guide hole (3311), and the other end of the mating part (332) is connected to the second base (20). The second rotating ring (331) and the first operating part (31) are spaced apart.

2. The iliac bone prosthesis according to claim 1, characterized in that, The operating mechanism (30) further includes a first spiral lifting part. The first operating member (31) includes a first operating ring (311). The first operating ring (311) is rotatably disposed on the first base (10), and the position of the first operating ring (311) remains unchanged along the stacking direction of the first base (10) and the second base (20). The transmission member (32) includes a transmission rod (321). One end of the transmission rod (321) is disposed on the second base (20). The first spiral lifting part is disposed between the first operating ring (311) and the transmission rod (321).

3. The iliac bone prosthesis according to claim 2, characterized in that, The first operating member (31) further includes a first rotating ring (312) disposed at one end of the first operating ring (311) near the first base (10). The first base (10) is provided with a rotating groove (11), and the first rotating ring (312) is rotatably disposed in the rotating groove (11).

4. The iliac bone prosthesis according to claim 1, characterized in that, The second rotating ring (331) is rotatably disposed on the first base (10). The operating mechanism (30) further includes a second spiral lifting part, which is disposed between the guide hole (3311) and the mating part (332). The operating mechanism (30) further includes a second operating member (34), a first tooth, a second tooth, and a third tooth. The second operating member (34) is rotatably disposed on the first base (10). The first operating member (31) and the second rotating ring (331) are arranged around the outer periphery of the second operating member (34). The first tooth is disposed around the outer periphery of the first operating member (31), the second tooth is disposed around the outer periphery of the second operating member (34), and the third tooth is disposed around the outer periphery of the second rotating ring (331). The second tooth meshes with both the first tooth and the third tooth.

5. The iliac bone prosthesis according to claim 4, characterized in that, The operating mechanism (30) further includes an operating lever (35), which is disposed on the second operating member (34). Both the second base (20) and the first base (10) are provided with clearance holes (21) to avoid the operating lever (35).

6. The iliac bone prosthesis according to claim 4, characterized in that, The iliac bone prosthesis also includes a stop structure (40), which is movably disposed between the first base (10) and the second base (20) along the radial direction of the second operating member (34). The stop structure (40) has a stop state and a avoidance state. When the stop structure (40) is in the stop state, the stop structure (40) abuts against the second tooth to restrict the rotation of the second operating member (34). When the stop structure (40) is in the avoidance state, the stop structure (40) separates from the second tooth.

7. The iliac bone prosthesis according to claim 5, characterized in that, The iliac bone prosthesis also includes a first fixing nut (80) and a second fixing nut (90). The first fixing nut (80) is located on the side of the first base (10) away from the second base (20), and the second fixing nut (90) is located on the side of the second base (20) away from the first base (10). The first fixing nut (80) and the second fixing nut (90) are respectively threaded to both ends of the operating rod (35). The first fixing nut (80) and the second fixing nut (90) have a fixed state and a separated state. When the first fixing nut (80) and the second fixing nut (90) are in the fixed state, the first fixing nut (80) abuts against the first base (10), and the second fixing nut (90) abuts against the second base (20); When the first fixing nut (80) and the second fixing nut (90) are in the separated state, the first fixing nut (80) is separated from the first base (10), and / or the second fixing nut (90) is separated from the second base (20).

8. The iliac bone prosthesis according to any one of claims 1 to 7, characterized in that, The second base (20) is connected to the sacrum (1). The iliac bone prosthesis also includes a third base (50) and a locking structure (60). The acetabular cup prosthesis (200) is connected to the first base (10) through the third base (50). The third base (50) is rotatably disposed on the first base (10). The rotation axis of the third base (50) is perpendicular to the stacking direction of the first base (10) and the second base (20). The locking structure (60) has a locked state and an unlocked state. When the locking structure (60) is in the locked state, the angle between the first base (10) and the third base (50) remains unchanged. When the locking structure (60) is in the unlocked state, the angle between the first base (10) and the third base (50) can change.

9. The iliac bone prosthesis according to claim 8, characterized in that, The iliac bone prosthesis also includes a connecting shaft (70), which is fixedly mounted on the first base (10). The third base (50) is rotatably mounted on the connecting shaft (70), and the axis of rotation of the third base (50) is the axis of the connecting shaft (70). The locking structure (60) includes a locking block (61) and an operating stud (62). The operating stud (62) is threadedly engaged with the third base (50), and the first end of the operating stud (62) is rotatably mounted on... The second end of the operating stud (62) is the operating end, and the locking block (61) is movably disposed on the third base (50) and located on the side of the third base (50) close to the first base (10). When the locking structure (60) is in the locked state, the locking block (61) abuts against the connecting shaft (70). When the locking structure (60) is in the unlocked state, the locking block (61) separates from the connecting shaft (70).

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