Acetabular prosthesis

Abstract

The invention provides an acetabular prosthesis, which comprises an acetabular cup, an acetabular prosthesis body, an acetabular prosthesis body and an acetabular prosthesis body, wherein a mounting groove is formed in the inner side of the acetabular cup; the lining is adjustably arranged in the mounting groove in the direction perpendicular to the inside and outside direction of the acetabular cup, and an adjusting interval is formed between the outer side wall of the lining and the groove wall of the mounting groove; and the filling piece is filled in the adjusting interval and is matched with the adjusting interval in size so as to limit the movement of the lining relative to the acetabular cup. According to the technical scheme, the problems that in the prior art, an acetabular cup is not easy to install in place, and the rotation center of a hip joint is not easy to reset can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial prostheses, in particular to an acetabular prosthesis. Background Art

[0002] The hip bone is composed of the ilium, ischium and pubis, which fuse into a single bone structure in adulthood. The acetabulum is an important part of the hip bone. The acetabulum is a deep and wide socket in the hip bone. The acetabulum is located at the intersection of the ilium, ischium and pubis. The acetabulum is shaped like a hemispherical groove. The acetabulum joins with the femoral head to form the hip joint. The acetabulum is an important part of the hip joint. The shape and structure of the acetabulum are crucial to the stability and function of the hip joint.

[0003] In the related art, when people encounter a large-scale hip joint defect, most doctors will choose to make a conventional acetabular cup and a conventional patch to fill the hip joint defect.

[0004] However, since the rotation center of the acetabular cup in the related art is fixed, the acetabular cup needs to be accurately implanted into the patient's hip bone when resetting the rotation center of the hip joint. However, some patients have long-term dislocation of the femoral head, making it difficult to install the acetabular cup and resetting the rotation center of the hip joint. Summary of the invention

[0005] The present invention provides an acetabular prosthesis to solve the problem in the related art that the acetabular cup is difficult to be installed in place and the rotation center of the hip joint is difficult to be reset.

[0006] The present invention provides an acetabular prosthesis, which includes: an acetabular cup, the inner side of which is provided with a mounting groove; a liner, which is adjustably arranged in the mounting groove in a direction perpendicular to the inner and outer directions of the acetabular cup, and an adjustment gap is provided between the outer side wall of the liner and the groove wall of the mounting groove; and a filling piece, which is filled in the adjustment gap and is adapted to the size of the adjustment gap to limit the movement of the liner relative to the acetabular cup.

[0007] Furthermore, the mounting groove adopts a semi-ellipsoidal structure, which protrudes outward in the inner and outer directions of the acetabular cup. The notch of the mounting groove is an elliptical structure. The long axis direction of the elliptical structure is set at an angle with the inner and outer directions of the acetabular cup, and the short axis direction of the elliptical structure is set at an angle with the inner and outer directions of the acetabular cup.

[0008] Further, a dimension of the adjustment interval in the direction of the major axis of the elliptical structure is greater than a dimension of the adjustment interval in the direction of the minor axis of the elliptical structure.

[0009] Furthermore, an iliac connection portion is provided on the outer side wall of the acetabular cup, and the iliac connection portion is located on the first side of the acetabular cup in the long axis direction of the elliptical structure.

[0010] Furthermore, the iliac connection portion includes an iliac wing plate, which is detachably arranged on the acetabular cup. The iliac wing plate is provided with an iliac connection hole. An angle adjustment structure is provided between the acetabular cup and the iliac wing plate to adjust the angle between the iliac wing plate and the acetabular cup.

[0011] Furthermore, a positioning column is provided on the iliac wing plate, the positioning column is perpendicular to the iliac wing plate, a positioning hole is provided on the outer wall of the acetabular cup, the positioning column is rotatably inserted into the positioning hole around its axis, and the angle adjustment structure includes: an adjustment column, which is provided on one of the iliac wing plate and the acetabular cup; a plurality of adjustment holes, which are provided on the other of the iliac wing plate and the acetabular cup, the plurality of adjustment holes are arranged along the rotation direction of the iliac wing plate relative to the acetabular cup, and the adjustment column can be selectively inserted into one of the plurality of adjustment holes.

[0012] Furthermore, the iliac connection portion further includes an iliac patch disposed on the outer surface of the acetabular cup.

[0013] Furthermore, a porous structure is provided on the outer surface of the iliac bone patch; and / or, the acetabular cup and the iliac bone patch adopt an integrally formed structure; and / or, a mounting hole group and a spare hole group are provided on the iliac bone patch, the spare hole group is arranged on the side of the mounting hole group away from the iliac wing plate, the mounting hole group includes at least two mounting holes, and the spare hole group includes at least two spare holes.

[0014] Furthermore, the acetabular prosthesis also includes a ischium patch, which is arranged on the second side of the acetabular cup in the long axis direction of the elliptical structure, and a mounting groove is provided on the side of the ischium patch facing the acetabular cup. A mounting platform matched with the mounting groove is provided on the outer wall of the acetabular cup, and the mounting platform extends into the mounting groove and is connected to the acetabular cup.

[0015] Furthermore, a first bone cement filling layer is arranged between the ischium patch and the acetabular cup; and / or, the acetabular prosthesis also includes a first connecting piece, the first connecting piece is passed through the mounting platform and the ischium patch and is threadedly connected to the acetabular cup, and the threaded connection between the first connecting piece and the acetabular cup is filled with a second bone cement filling layer; and / or, the mounting platform and the assembly groove both adopt a conical structure, and in the direction in which the mounting platform extends into the assembly groove, the cross-sectional dimensions of the mounting platform and the cross-sectional dimensions of the assembly groove gradually decrease.

[0016] Furthermore, the acetabular prosthesis also includes a pubic bone patch, which is arranged on the second side of the acetabular cup in the long axis direction of the elliptical structure, and the pubic bone patch is detachably connected to the acetabular cup.

[0017] Furthermore, a first connecting through hole is provided on the pubic patch, the first connecting through hole includes a first threaded hole section and a first countersunk hole section which are connected, the first countersunk hole section is located on the side of the first threaded hole section away from the acetabular cup, the aperture of the first countersunk hole section is larger than the aperture of the first threaded hole section, a second connecting through hole is provided on the acetabular cup, the second connecting through hole includes a second threaded hole section and a second countersunk hole section which are connected, the aperture of the second countersunk hole section is larger than the aperture of the second threaded hole section, the second countersunk hole section is located on the side of the second threaded hole section away from the pubic patch, the acetabular prosthesis also includes a second connecting member, the second connecting member includes: a screw rod, which is passed through the first connecting through hole and the second connecting through hole, the screw rod is threadedly matched with the first threaded hole and the second threaded hole respectively; a screw head, which is located in the first countersunk hole or the second countersunk hole.

[0018] Further, the filling piece includes a filling patch and a third bone cement filling layer, the filling patch is arranged in the adjustment interval, the third bone cement filling layer is sandwiched between the outer wall of the liner and the groove wall of the mounting groove, and / or the third bone cement filling layer is sandwiched between the outer wall of the liner and the outer wall of the filling patch, and / or the third bone cement filling layer is sandwiched between the groove wall of the mounting groove and the outer wall of the filling patch.

[0019] By applying the technical solution of the present invention, the acetabular prosthesis includes an acetabular cup, a liner and a filling piece. The inner side of the acetabular cup is provided with a mounting groove, and an adjustment gap is provided between the outer wall of the liner and the groove wall of the mounting groove. The position of the liner is adjustable in a direction perpendicular to the inner and outer directions of the acetabular cup, so that the placement of the liner can be adjusted according to the actual situation during the operation, so as to flexibly adjust the rotation center of the acetabular prosthesis according to the specific situation of the patient, and the filling piece is filled in the adjustment gap and matched with the size of the adjustment gap to limit the movement of the liner relative to the acetabular cup, so that the acetabular prosthesis can adapt to the anatomical structure of the acetabulum of different patients, realize personalized customization, improve the accuracy and success rate of the operation, reduce postoperative complications, and improve the quality of life of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic structural diagram of an acetabular prosthesis provided according to an embodiment of the present invention is shown;

[0022] Figure 2 An exploded view of an acetabular prosthesis provided according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic structural diagram of an iliac wing plate of an acetabular prosthesis provided according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic structural diagram of an acetabular cup and a sciatic patch of an acetabular prosthesis provided in an embodiment of the present invention is shown;

[0025] Figure 5 A schematic structural diagram of an acetabular cup of an acetabular prosthesis provided according to an embodiment of the present invention is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. Acetabular cup; 11. Mounting groove; 12. Ilium connection portion; 121. Ilium wing plate; 1211. Ilium connection hole; 1212. Positioning column; 122. Ilium patch; 1221. Porous structure; 123. Mounting hole group; 124. Spare hole group; 13. Positioning hole; 14. Mounting platform; 20. Liner; 30. Adjustment interval; 40. Filling piece; 41. Filling patch;

[0028] 50. Angle adjustment structure; 51. Adjustment column; 52. Adjustment hole;

[0029] 60. Ischial patch; 61. Mounting slot;

[0030] 70. Pubic bone patch;

[0031] X, the major axis direction of the elliptical structure; Y, the minor axis direction of the elliptical structure. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 5 As shown, an embodiment of the present invention provides an acetabular prosthesis, which includes an acetabular cup 10, a liner 20 and a filling piece 40. The inner side of the acetabular cup 10 has a mounting groove 11, and the liner 20 is adjustably arranged in the mounting groove 11 in a direction perpendicular to the inner and outer directions of the acetabular cup 10. An adjustment gap 30 is provided between the outer side wall of the liner 20 and the groove wall of the mounting groove 11. The filling piece 40 is filled in the adjustment gap 30 and is adapted to the size of the adjustment gap 30 to limit the movement of the liner 20 relative to the acetabular cup 10.

[0034] The acetabular prosthesis provided in this embodiment includes an acetabular cup 10, a liner 20 and a filling piece 40. The inner side of the acetabular cup 10 has a mounting groove 11, and an adjustment gap 30 is provided between the outer wall of the liner 20 and the groove wall of the mounting groove 11. The position of the liner 20 is adjustable in a direction perpendicular to the inner and outer directions of the acetabular cup 10, so that the placement position of the liner 20 can be adjusted according to the actual situation during the operation, so as to flexibly adjust the rotation center of the acetabular prosthesis according to the specific situation of the patient, and the filling piece 40 is filled in the adjustment gap 30 and adapted to the size of the adjustment gap 30 to limit the movement of the liner 20 relative to the acetabular cup 10, so that the acetabular prosthesis can adapt to the anatomical structure of the acetabulum of different patients, realize personalized customization, improve the accuracy and success rate of the operation, reduce postoperative complications, and improve the quality of life of patients.

[0035] Specifically, before the operation, 3D modeling is performed based on the CT data of the patient's acetabulum to determine the initial position of the liner 20 and the initial size of the filling piece 40. During the operation, the position of the liner 20 is fine-tuned according to actual conditions, and the filling piece 40 is filled in the adjustment interval 30 to ensure the fit between the acetabular prosthesis and the patient's bone. Finally, bone cement is filled to fix the liner 20 and the filling piece 40.

[0036] like Figure 1 As shown, the mounting groove 11 adopts a semi-ellipsoid structure, which protrudes outward in the inner and outer directions of the acetabular cup 10, and the notch of the mounting groove 11 is an elliptical structure. The long axis direction of the elliptical structure is set at an angle with the inner and outer directions of the acetabular cup 10, and the short axis direction of the elliptical structure is set at an angle with the inner and outer directions of the acetabular cup 10. Compared with the short axis direction of the elliptical structure, in the long axis direction of the elliptical structure, a larger adjustment space is provided for the liner 20, thereby realizing the precise adjustment of the rotation center, improving the adaptability range of the acetabular prosthesis, making the surgery more personalized, and being able to better meet the special needs of patients with long-term femoral head dislocation.

[0037] Specifically, in hip revision surgery, due to the long-term dislocation of the femoral head in some patients, it is difficult to reposition the rotation center during the revision surgery, especially for patients with severe acetabular defects. If a conventional hemispherical acetabular cup is used, the RPC theory cannot be satisfied (if the radius of the acetabular cup is too small, the fit with the bone is not comprehensive and the RPC (ring-point-column) theory cannot be achieved; if the radius of the acetabular cup is too large, the acetabular cup will interfere too much with the bone, and too much bone will need to be removed during the operation, which is not conducive to the patient's recovery). When the acetabular prosthesis provided in this embodiment is used, the mounting groove 11 adopts a semi-ellipsoidal structure, and the semi-ellipsoidal structure is inside and outside the acetabular cup 10. The acetabular cup 10 is in a large area in contact with the bone, thereby ensuring the initial stability of the prosthesis. After the acetabular cup 10 is placed during the operation, the position of the liner 20 is adjusted according to the actual situation (the placement position of the acetabulum and the position of the femoral head), that is, the center position of the liner 20 (the rotation center) is adjusted, and then the filling piece 40 is filled in the adjustment interval between the liner 20 and the mounting slot 11 to fix the liner 20, thereby ensuring the stability and biomechanical properties of the acetabular prosthesis.

[0038] like Figure 1 As shown, the size of the adjustment interval 30 in the long axis direction of the elliptical structure is greater than the size of the adjustment interval 30 in the short axis direction of the elliptical structure. By utilizing the characteristics of the elliptical structure, a larger adjustment range is provided for the liner 20 in the long axis direction of the elliptical structure compared to the short axis direction of the elliptical structure, while sufficient stability is maintained in the short axis direction to prevent excessive movement of the liner 20.

[0039] like Figure 1 As shown, an iliac connection portion 12 is provided on the outer wall of the acetabular cup 10, and the iliac connection portion 12 is located on the first side of the acetabular cup 10 in the long axis direction of the elliptical structure. In actual surgery, due to the limited exposed bone, it is not convenient to flexibly place the prosthesis. If the patient has a large area of ​​bone defect at the ilium, the iliac connection portion 12 is connected to the ilium to increase the connection and contact area between the acetabular cup 10 and the bone, improve the stability of the acetabular prosthesis, reduce the risk of sinking or rotation of the acetabular prosthesis, and improve the success rate of the surgery and the patient's rehabilitation effect.

[0040] Specifically, the size and position of the iliac connection part 12 are determined before the operation, and the fit between the iliac connection part 12 and the bone is ensured during the operation to provide better bone contact and fixation scheme, which is beneficial to the initial stability of the acetabular prosthesis and avoids causing the patient to undergo another operation.

[0041] like Figure 1As shown, the iliac connection portion 12 includes an iliac wing plate 121, which is detachably arranged on the acetabular cup 10, and an iliac connection hole 1211 is arranged on the iliac wing plate 121. An angle adjustment structure 50 is arranged between the acetabular cup 10 and the iliac wing plate 121 to adjust the angle between the iliac wing plate 121 and the acetabular cup 10. The detachable and angle-adjustable iliac wing plate 121 provides a greater surgical tolerance for the acetabular prosthesis, so that the acetabular prosthesis can better adapt to the irregular shape of the patient's bone after implantation, ensure the stability and biomechanical properties of the acetabular prosthesis, and improve the flexibility and success rate of the operation.

[0042] Specifically, the angle and position of the iliac wing plate 121 are designed according to the patient's bone condition before the operation. During the operation, whether to install the iliac wing plate 121 and adjust the angle of the iliac wing plate 121 are determined according to the actual situation to increase the fit between the iliac wing plate 121 and the iliac bone. Finally, fasteners are inserted into the iliac connection holes 1211 and connected to the iliac bone to fix the iliac wing plate 121 on the ilium to prevent the acetabular prosthesis from rotating and sinking after implantation, thereby ensuring the initial stability of the acetabular prosthesis.

[0043] Specifically, the portion of the acetabular cup 10 that contacts the iliac wing plate 121 is of a solid structure, and no porous structure is provided at this portion. The axial direction of the iliac connection hole 1211 is approximately perpendicular to the iliac wing plate 121 .

[0044] Specifically, the iliac wing plate 121 is connected to the acetabular cup 10 by screws.

[0045] In this embodiment, the thickness of the iliac wing plate 121 is between 4 mm and 6 mm. The thickness of the iliac wing plate 121 can be 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, or any value between 4 mm and 6 mm.

[0046] like Figure 2 and Figure 3As shown, a positioning column 1212 is provided on the iliac wing plate 121, and the positioning column 1212 is perpendicular to the iliac wing plate 121. A positioning hole 13 is provided on the outer wall of the acetabular cup 10. The positioning column 1212 is rotatably inserted into the positioning hole 13 around its axis. The angle adjustment structure 50 includes an adjustment column 51 and a plurality of adjustment holes 52. The adjustment column 51 is provided on one of the iliac wing plate 121 and the acetabular cup 10, and the plurality of adjustment holes 52 are provided on the other of the iliac wing plate 121 and the acetabular cup 10. The plurality of adjustment holes 52 are arranged along the rotation direction of the iliac wing plate 121 relative to the acetabular cup 10, and the adjustment column 51 can be selectively inserted into one of the plurality of adjustment holes 52. Specifically, during the operation, the positioning column 1212 and the positioning hole 13 cooperate to provide a stable rotation axis for the angle adjustment of the iliac wing plate 121. After the angle is adjusted in place, the adjustment column 51 is inserted into the corresponding adjustment hole 52 to fix the angle of the iliac wing plate 121.

[0047] The central angle between any two adjacent adjustment holes 52 relative to the positioning hole 13 is 30°.

[0048] like Figure 1 As shown, the iliac connection portion 12 also includes an iliac patch 122 disposed on the outer surface of the acetabular cup 10. In actual surgery, due to the limited exposed bone, it is not convenient to flexibly place the prosthesis. If the patient has a large area of ​​bone defect at the ilium, the shape and position of the iliac patch 122 are designed according to the defect of the patient's iliac bone before surgery, so that the iliac patch 122 can fill the corresponding iliac bone defect, increase the contact area between the acetabular cup 10 and the bone, improve the fixation effect of the acetabular cup 10 on the bone, which is beneficial to the initial stability of the acetabular prosthesis and avoids causing the patient to undergo surgery again.

[0049] like Figure 2 As shown, a porous structure 1221 is provided on the outer surface of the iliac bone patch 122, which is beneficial to the subsequent mid-to-late stage bone ingrowth, improves the mid-to-late stage stability of the acetabular prosthesis, and improves the success rate of the operation and the patient's rehabilitation effect.

[0050] In this embodiment, the acetabular cup 10 and the iliac bone patch 122 are formed in an integrally formed structure to improve the biomechanical properties of the acetabular prosthesis.

[0051] like Figure 2As shown, the iliac bone patch 122 is provided with a mounting hole group 123 and a spare hole group 124, the spare hole group 124 is provided on the side of the mounting hole group 123 away from the iliac wing plate 121, the mounting hole group 123 includes at least two mounting holes, and the spare hole group 124 includes at least two spare holes. The mounting hole group 123 and the spare hole group 124 provide a variety of fixing methods. During the operation, the mounting hole group 123 or the spare hole group 124 is selected according to the actual situation to fix the iliac bone patch 122 and the acetabular cup 10. If the mounting hole group 123 cannot be installed in place, the spare hole group 124 is used to prevent the inaccurate placement of the prosthesis during the operation, thereby improving the flexibility of the operation and the stability of the prosthesis.

[0052] In this embodiment, the acetabular cup 10 and the iliac bone patch 122 are integrally formed by metal 3D printing, and the total thickness of the acetabular cup 10 and the iliac bone patch 122 is between 4 mm and 6 mm, wherein the total thickness of the acetabular cup 10 and the iliac bone patch 122 can be 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, and any value between 4 mm and 6 mm. The above thickness range is adopted to avoid excessive thickness resulting in the length of the screw channel of the mounting hole group 123 and the spare hole group 124, improve the direction accuracy of the screws placed in the mounting hole group 123 or the spare hole group 124 during surgery, and play a role in weight reduction.

[0053] Specifically, at least two mounting holes are arranged in a direction parallel to the iliac wing plate 121 , and at least two spare holes are arranged in a direction parallel to the iliac wing plate 121 . Both the mounting holes and the spare holes extend toward the iliac cancellous bone.

[0054] like Figure 1 As shown, the acetabular prosthesis also includes an ischium patch 60, which is arranged on the second side of the acetabular cup 10 in the direction of the long axis of the elliptical structure of the acetabular cup 10, and a mounting groove 61 is arranged on the side of the ischium patch 60 facing the acetabular cup 10, and a mounting platform 14 adapted to the mounting groove 61 is arranged on the outer wall of the acetabular cup 10, and the mounting platform 14 extends into the mounting groove 61 and is connected to the acetabular cup 10. In actual surgery, due to the limited exposed bone, it is not convenient to flexibly place the prosthesis. When the patient's ischium bone is defective in a large area, the shape and position of the ischium patch 60 are designed according to the defective condition of the patient's ischium bone before surgery, so that the ischium patch 60 can fill the corresponding ischium defective bone, increase the contact area between the acetabular cup 10 and the bone, improve the fixing effect of the acetabular cup 10 on the bone, which is beneficial to the initial stability of the acetabular prosthesis, reduce the risk of the acetabular prosthesis sinking or rotating, and improve the success rate of the operation and the patient's rehabilitation effect.

[0055] Among them, through the cooperation between the assembly groove 61 of the ischium patch 60 and the mounting platform 14 of the acetabular cup 10, the fit between the ischium patch 60 and the acetabular cup 10 is improved, the precise connection between the ischium patch 60 and the acetabular cup 10 is achieved, and the stability of the acetabular prosthesis is improved.

[0056] It should be noted that the mounting platform 14 can be in the shape of a cylinder, a cone, a truncated cone, a prism, etc.

[0057] like Figure 1 As shown, a first bone cement filling layer is provided between the ischium patch 60 and the acetabular cup 10. If the bone defect at the ischium of the patient is serious and cannot meet the strength required for connecting the ischium patch, the first bone cement filling layer is provided to provide additional mechanical fixation to promote the biological fusion of the ischium patch 60 and the acetabular cup 10 and improve the stability of the acetabular prosthesis.

[0058] Specifically, in the direction in which the mounting platform 14 extends into the assembly groove 61 , the size of the first bone cement filling layer is between 1 mm and 3 mm.

[0059] like Figure 1 As shown, the acetabular prosthesis also includes a first connector, which is inserted through the mounting platform 14 and the ischium patch 60 and is threadedly connected to the acetabular cup 10, and a second bone cement filling layer is filled at the threaded connection between the first connector and the acetabular cup 10. Since some patients have severe bone defects at the ischium, the ischium patch cannot be connected and fixed to the bone by screws, so screws and bone cement are used to connect and fix the acetabular cup and the ischium patch, which are first screwed in, then bone cement is poured, and tightened before solidification.

[0060] Specifically, the first connector is screwed in first, the first connector is passed through the mounting platform 14 and the ischium patch 60 and is threadedly connected to the acetabular cup 10, and then bone cement is poured. The first connector is tightened before the bone cement solidifies to form a first bone cement filling layer and a second bone cement filling layer.

[0061] In this embodiment, both the mounting platform 14 and the assembly groove 61 adopt a conical structure, and the cross-sectional dimensions of the mounting platform 14 and the cross-sectional dimensions of the assembly groove 61 gradually decrease in the direction in which the mounting platform 14 extends into the assembly groove 61. By separating the ischium patch 60 from the acetabular cup 10, it is avoided that the ischium patch 60 is too large to be difficult to place, and both the mounting platform 14 and the assembly groove 61 adopt a conical structure to avoid the ischium patch 60 and the acetabular cup 10 from being easily loose and unstable, which not only ensures the convenience of prosthesis placement, but also ensures the initial stability of the prosthesis, and the mounting platform 14 and the assembly groove 61 adopt a conical structure, which also plays a role in installation and positioning.

[0062] like Figure 1As shown, the acetabular prosthesis also includes a pubic patch 70, which is arranged on the second side of the acetabular cup 10 in the direction of the long axis of the elliptical structure, and the pubic patch 70 is detachably connected to the acetabular cup 10. In actual surgery, due to the limited exposed bone, it is not convenient to flexibly place the prosthesis. When the patient's pubic bone is defective in a large area, the shape and position of the pubic patch 70 are designed according to the defect of the patient's pubic bone before surgery. During the operation, the pubic patch 70 is used to fit the pubic bone. The pubic patch 70 adapts to the irregular shape of the patient's pubic bone, realizes personalized matching between the acetabular prosthesis and the patient's bone, increases the contact area between the acetabular cup 10 and the bone, improves the stability of the acetabular prosthesis, reduces the risk of the acetabular prosthesis sinking or rotating, and improves the success rate of the operation and the patient's rehabilitation effect.

[0063] In this embodiment, a first connecting through hole is provided on the pubic patch 70, and the first connecting through hole includes a first threaded hole section and a first countersunk hole section that are connected, and the first countersunk hole section is located on the side of the first threaded hole section away from the acetabular cup 10, and the aperture of the first countersunk hole section is larger than the aperture of the first threaded hole section. A second connecting through hole is provided on the acetabular cup 10, and the second connecting through hole includes a second threaded hole section and a second countersunk hole section that are connected, and the aperture of the second countersunk hole section is larger than the aperture of the second threaded hole section, and the second countersunk hole section is located on the side of the second threaded hole section away from the pubic patch 70. The acetabular prosthesis also includes a second connecting member, and the second connecting member includes a screw and a screw head, and the screw is passed through the first connecting through hole and the second connecting through hole, and the screw is threadedly matched with the first threaded hole and the second threaded hole respectively, and the screw head is located in the first countersunk hole or the second countersunk hole. The first connecting through hole and the second threaded hole are both facing the pubic cancellous bone.

[0064] like Figure 1 As shown, the filling piece 40 includes a filling patch 41 and a third bone cement filling layer, the filling patch 41 is arranged in the adjustment interval 30, the third bone cement filling layer is sandwiched between the outer wall of the liner 20 and the groove wall of the mounting groove 11, and / or, the third bone cement filling layer is sandwiched between the outer wall of the liner 20 and the outer wall of the filling patch 41, and / or, the third bone cement filling layer is sandwiched between the groove wall of the mounting groove 11 and the outer wall of the filling patch 41. By using the cooperation of the filling patch 41 and the third bone cement filling layer, the liner 20 is stably fixed in the mounting groove 11, and the adaptability and stability of the acetabular prosthesis are improved.

[0065] Specifically, after the acetabular cup 10 is placed during the operation, the filling patch 41 and an appropriate amount of bone cement are placed in the mounting groove 11, and then the liner 20 is placed in the mounting groove 11 and the position of the liner 20 is adjusted. After the position is adjusted to the right position, the filling patch 41 and / or bone cement are supplemented in the adjustment space between the liner 20 and the mounting groove 11 to fix the liner 20, thereby ensuring the stability and biomechanical properties of the acetabular prosthesis.

[0066] In this embodiment, a holder hole is provided on the liner 20. In actual surgery, due to limited exposed bone, the doctor cannot hold the liner 20 well and directly put it into the human body. The holder hole can facilitate the doctor to use tools to place the liner 20 during the operation.

[0067] In this embodiment, porous structures are also provided on the bone contact surfaces of the acetabular cup 10, the ischium patch 60 and the pubic patch 70, which are beneficial to the subsequent mid-to-late stage bone ingrowth and improve the mid-to-late stage stability of the acetabular prosthesis.

[0068] In this embodiment, the iliac connection 12, the ischium patch 60 and the pubic patch 70 use the RPC (ring-point-column) theory to increase the stability of the acetabular cup 10. It should be noted that the RPC theory is the circle-point-column theory of acetabular reconstruction: the initial stability of the acetabular non-cement fixation reconstruction comes from "circle fixation" or "three-point fixation", and the integrity of the anterior and posterior columns of the acetabulum, especially the posterior column, plays a crucial and decisive role in the support capacity of the fixation points. "Three-point fixation" refers to the bone close to the rim of the acetabulum. Under the premise of the existence of defects, if there are three stable points, it can still provide sufficient initial stability for the acetabular cup. "Circle fixation" can also be understood as using several "three-point fixations" to form several triangles in the inner and outer directions to increase the stability of the reconstructed structure.

[0069] Specifically, the ischium patch is first placed on the ischium, and then the acetabular cup is placed. When placing the acetabular cup, attention should be paid to the accurate matching of the cone matching structure of the acetabular cup and the ischium patch. After the acetabular cup is placed, the acetabular cup is fixed, and the acetabular cup and the ischium patch are connected by screws. At the same time, bone cement is filled in the screw holes at the ischium of the acetabular cup and the screw holes of the ischium patch to ensure the early stability of the ischium patch. The directions of the above screw holes are convenient for doctors to implant screws during surgery while ensuring the connection strength between the prosthesis and the bone.

[0070] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0071] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0072] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0073] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0074] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An acetabular prosthesis, characterized in that: The acetabular prosthesis comprises: An acetabular cup (10), wherein the inner side of the acetabular cup (10) has a mounting groove (11); An inner liner (20), the inner liner (20) being adjustably arranged in the mounting groove (11) in a direction perpendicular to the inner and outer directions of the acetabular cup (10), and an adjustable gap (30) being provided between the outer side wall of the inner liner (20) and the groove wall of the mounting groove (11); A filling piece (40) is filled in the adjustment gap (30) and is adapted to the size of the adjustment gap (30) so as to limit the movement of the liner (20) relative to the acetabular cup (10).

2. The acetabular prosthesis according to claim 1, characterized in that: The mounting groove (11) adopts a semi-ellipsoid structure, the semi-ellipsoid structure protrudes outward in the inner and outer directions of the acetabular cup (10), the notch of the mounting groove (11) is an elliptical structure, the major axis direction of the elliptical structure is set at an angle with the inner and outer directions of the acetabular cup (10), and the minor axis direction of the elliptical structure is set at an angle with the inner and outer directions of the acetabular cup (10).

3. The acetabular prosthesis according to claim 2, characterized in that: The dimension of the adjustment interval (30) in the direction of the major axis of the elliptical structure is greater than the dimension of the adjustment interval (30) in the direction of the minor axis of the elliptical structure.

4. The acetabular prosthesis according to claim 2, characterized in that: An iliac bone connection portion (12) is provided on the outer side wall of the acetabular cup (10), and the iliac bone connection portion (12) is located on a first side of the acetabular cup (10) in the direction of the long axis of the elliptical structure.

5. The acetabular prosthesis according to claim 4, characterized in that: The iliac connection portion (12) comprises an iliac wing plate (121) which is detachably arranged on the acetabular cup (10); an iliac connection hole (1211) is arranged on the iliac wing plate (121); and an angle adjustment structure (50) is arranged between the acetabular cup (10) and the iliac wing plate (121) to adjust the angle between the iliac wing plate (121) and the acetabular cup (10).

6. The acetabular prosthesis according to claim 5, characterized in that: A positioning column (1212) is provided on the iliac wing plate (121), and the positioning column (1212) is perpendicular to the iliac wing plate (121). A positioning hole (13) is provided on the outer wall of the acetabulum cup (10), and the positioning column (1212) is rotatably arranged around its axis through the positioning hole (13). The angle adjustment structure (50) comprises: An adjustment column (51) disposed on one of the iliac wing plate (121) and the acetabular cup (10); A plurality of adjustment holes (52) are provided on the other of the iliac wing plate (121) and the acetabular cup (10), the plurality of adjustment holes (52) being arranged along the rotation direction of the iliac wing plate (121) relative to the acetabular cup (10), and the adjustment column (51) can be selectively passed through one of the plurality of adjustment holes (52).

7. The acetabular prosthesis according to claim 5, characterized in that: The iliac connection portion (12) further comprises an iliac patch (122) arranged on the outer surface of the acetabular cup (10).

8. The acetabular prosthesis according to claim 7, characterized in that: A porous structure (1221) is provided on the outer surface of the iliac bone patch (122); and / or, The acetabular cup (10) and the iliac bone patch (122) are of an integrally formed structure; and / or, The iliac patch (122) is provided with a mounting hole group (123) and a spare hole group (124); the spare hole group (124) is provided on a side of the mounting hole group (123) away from the iliac wing plate (121); the mounting hole group (123) includes at least two mounting holes, and the spare hole group (124) includes at least two spare holes.

9. The acetabular prosthesis according to claim 2, characterized in that: The acetabular prosthesis further comprises an ischium patch (60), wherein the ischium patch (60) is arranged on the second side of the acetabular cup (10) in the direction of the long axis of the elliptical structure, and the ischium patch (60) is provided with an assembly groove (61) on the side facing the acetabular cup (10), and a mounting platform (14) adapted to the assembly groove (61) is provided on the outer side wall of the acetabular cup (10), and the mounting platform (14) extends into the assembly groove (61) and is connected to the acetabular cup (10).

10. The acetabular prosthesis according to claim 9, characterized in that: A first bone cement filling layer is provided between the ischium patch (60) and the acetabular cup (10); and / or, The acetabular prosthesis further comprises a first connecting member, the first connecting member being inserted through the mounting platform (14) and the ischium patch (60) and being threadedly connected to the acetabular cup (10), the threaded connection between the first connecting member and the acetabular cup (10) being filled with a second bone cement filling layer; and / or, The mounting platform (14) and the assembly groove (61) both adopt a conical structure, and in the direction in which the mounting platform (14) extends into the assembly groove (61), the cross-sectional dimensions of the mounting platform (14) and the cross-sectional dimensions of the assembly groove (61) both gradually decrease.

11. The acetabular prosthesis according to claim 2, characterized in that: The acetabular prosthesis further comprises a pubic patch (70), wherein the pubic patch (70) is arranged on the second side of the acetabular cup (10) in the direction of the long axis of the elliptical structure, and the pubic patch (70) is detachably connected to the acetabular cup (10).

12. The acetabular prosthesis according to claim 11, characterized in that: The pubic patch (70) is provided with a first connecting through hole, the first connecting through hole comprising a first threaded hole section and a first countersunk hole section that are connected to each other, the first countersunk hole section being located on a side of the first threaded hole section away from the acetabular cup (10), the aperture of the first countersunk hole section being larger than the aperture of the first threaded hole section, the acetabular cup (10) is provided with a second connecting through hole, the second connecting through hole comprising a second threaded hole section and a second countersunk hole section that are connected to each other, the aperture of the second countersunk hole section being larger than the aperture of the second threaded hole section, the second countersunk hole section being located on a side of the second threaded hole section away from the pubic patch (70), the acetabular prosthesis further comprising a second connecting member, the second connecting member comprising: A screw rod is inserted into the first connecting through hole and the second connecting through hole, and the screw rod is threadedly matched with the first threaded hole and the second threaded hole respectively; The screw head is located in the first countersunk hole or the second countersunk hole.

13. The acetabular prosthesis according to claim 1, characterized in that: The filling piece (40) comprises a filling patch (41) and a third bone cement filling layer, wherein the filling patch (41) is arranged in the adjustment gap (30), and the third bone cement filling layer is sandwiched between the outer wall of the liner (20) and the groove wall of the mounting groove (11), and / or the third bone cement filling layer is sandwiched between the outer wall of the liner (20) and the outer wall of the filling patch (41), and / or the third bone cement filling layer is sandwiched between the groove wall of the mounting groove (11) and the outer wall of the filling patch (41).

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