Acetabular prosthesis

Abstract

The present invention provides an acetabular prosthesis, which includes: an acetabular cup, the inner side of the acetabular cup having a mounting groove; a liner, the liner being disposed in the mounting groove in a position-adjustable manner in a direction perpendicular to the inner and outer direction of the acetabular cup, there being an adjustment gap between the outer side wall of the liner and the groove wall of the mounting groove; a filling member, filled in the adjustment gap and adapted to the size of the adjustment gap to limit the movement of the liner relative to the acetabular cup. Through the technical solution provided by the present application, the problems in the related art that the acetabular cup is not easily installed in place and the rotation center of the hip joint is not easily reset can be solved.

Description

Technical Field

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

[0002] The hip bone is composed of the ilium, ischium, and pubis. The ilium, ischium, and pubis fuse into a single bone structure after 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 shape of the acetabulum is like a hemispherical groove. The acetabulum engages 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 for the stability and function of the hip joint.

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

[0004] However, due to the fixed rotation center setting of the acetabular cup in the related art, when resetting the rotation center of the hip joint, the acetabular cup needs to be accurately implanted into the patient's hip bone. However, the long - term dislocation of the femoral head in some patients makes it difficult to install the acetabular cup in place and difficult to reset the rotation center of the hip joint. Summary of the Invention

[0005] The present invention provides an acetabular prosthesis to solve the problem that the acetabular cup in the related art is not easy to be installed in place and the rotation center of the hip joint is not easy to be reset.

[0006] The present invention provides an acetabular prosthesis, which includes: an acetabular cup, with an installation groove on the inner side thereof; a liner, which is disposed in the installation groove in a position - adjustable manner in a direction perpendicular to the inner - outer direction of the acetabular cup, and there is an adjustment interval between the outer side wall of the liner and the groove wall of the installation groove; a filling member, which is filled in the adjustment interval and is adapted to the size of the adjustment interval to limit the movement of the liner relative to the acetabular cup.

[0007] Further, the installation groove adopts a semi - ellipsoidal structure, the semi - ellipsoidal structure protrudes outward in the inner - outer direction of the acetabular cup, the notch of the installation groove is an elliptical structure, the long - axis direction of the elliptical structure is arranged at an angle with the inner - outer direction of the acetabular cup, and the short - axis direction of the elliptical structure is arranged at an angle with the inner - outer direction of the acetabular cup.

[0008] Further, the size of the adjustment interval in the long - axis direction of the elliptical structure is larger than the size of the adjustment interval in the short - axis direction of the elliptical structure.

[0009] Further, an ilium connection part is provided on the outer side wall of the acetabular cup, and the ilium connection part 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. An iliac connection hole is provided on the iliac wing plate. 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 acetabulum cup, and the positioning column is rotatably provided around its axis and is inserted into the positioning hole. The angle adjustment structure includes: an adjustment column, which is provided on one of the iliac wing plate and the acetabulum cup; a plurality of adjustment holes, which are provided on the other of the iliac wing plate and the acetabulum cup, and the plurality of adjustment holes are arranged along the rotation direction of the iliac wing plate relative to the acetabulum 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 acetabulum 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 provided 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 an ischium patch, which is arranged on the second side of the acetabular cup in the long axis direction of the elliptical structure. The ischium patch is provided with an assembly groove on the side facing the acetabular cup, and a mounting platform adapted to the assembly groove is provided on the outer wall of the acetabular cup. The mounting platform extends into the assembly groove and is connected to the acetabular cup.

[0015] Furthermore, a first bone cement filling layer is provided 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 slot both adopt a conical structure, and in the direction in which the mounting platform extends into the assembly slot, the cross-sectional dimensions of the mounting platform and the cross-sectional dimensions of the assembly slot gradually decrease.

[0016] Furthermore, the acetabular prosthesis further includes a pubic bone patch, which is arranged on the second side of the acetabular cup in the direction of the long axis 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 section that are connected, the first countersunk section is located on the side of the first threaded hole section away from the acetabular cup, the aperture of the first countersunk 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 section that are connected, the aperture of the second countersunk section is larger than the aperture of the second threaded hole section, the second countersunk section is located on the side of the second threaded hole section away from the pubic patch, the acetabulum 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, and the screw rod is threadedly engaged 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] Furthermore, the filling piece includes a filling patch and a third bone cement filling layer, the filling patch is arranged in the adjustment gap, 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 side 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 position 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 adapted to 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 accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[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 the iliac wing plate of the acetabular prosthesis provided in accordance with an embodiment of the present invention is shown;

[0024] Figure 4 The structural schematic diagrams of the acetabular cup and the ischial patch of the acetabular prosthesis provided according to an embodiment of the present invention are shown;

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

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

[0027] 10. Acetabular cup; 11. Installation groove; 12. Ilium connection part; 121. Ilium wing plate; 1211. Ilium connection hole; 1212. Positioning column; 122. Ilium patch; 1221. Porous structure; 123. Installation hole group; 124. Spare hole group; 13. Positioning hole; 14. Installation 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. Assembly groove;

[0030] 70. Pubic patch;

[0031] X. Long axis direction of the elliptical structure; Y. Short axis direction of the elliptical structure. Detailed implementation manners

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

[0033] As Figures 1 to 5 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 an installation groove 11. The liner 20 is disposed in the installation groove 11 in a position-adjustable manner in a direction perpendicular to the inner and outer direction of the acetabular cup 10. There is an adjustment interval 30 between the outer side wall of the liner 20 and the groove wall of the installation groove 11. The filling piece 40 is filled in the adjustment interval 30 and is adapted to the size of the adjustment interval 30 to limit the movement of the liner 20 relative to the acetabular cup 10.

[0034] Applying the acetabular prosthesis provided by this embodiment, the acetabular prosthesis includes an acetabular cup 10, a liner 20 and a filling member 40. The inner side of the acetabular cup 10 has a mounting groove 11. There is an adjustment gap 30 between the outer side wall of the liner 20 and the groove wall of the mounting groove 11. The position of the liner 20 is adjustable in the direction perpendicular to the inner and outer direction 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 member 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, so that the acetabular prosthesis can adapt to the anatomical structures of the acetabulae 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 the patient.

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

[0036] As Figure 1 shown, the mounting groove 11 adopts a semi-ellipsoidal structure. The semi-ellipsoidal structure protrudes outward in the inner and outer direction of the acetabular cup 10. The notch of the mounting groove 11 is an elliptical structure. The long axis direction of the elliptical structure is arranged at an angle with the inner and outer direction of the acetabular cup 10, and the short axis direction of the elliptical structure is arranged at an angle with the inner and outer direction of the acetabular cup 10. Relative to 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, so as to realize the precise adjustment of the rotation center, improve the adaptation range of the acetabular prosthesis, make the operation more personalized, and 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 reset the center of rotation during the revision surgery. Especially for patients with severe acetabular defects, if a conventional hemispherical acetabular cup is used, it cannot meet the RPC theory (if the radius of the acetabular cup is too small, it does not fully conform to the bone, and the RPC (ring point column) theory cannot be achieved; if the radius of the acetabular cup is too large, it will cause excessive interference between the acetabular cup and the bone, and too much bone needs to be removed during the operation, which is not conducive to the patient's recovery). When applying the acetabular prosthesis provided in this embodiment, the installation groove 11 adopts a semi-ellipsoidal structure, and the semi-ellipsoidal structure bulges outward in the inner and outer directions of the acetabular cup 10. The notch of the installation groove 11 is an elliptical structure. Before the operation, the degree of acetabular defect and the preliminary position of the center of rotation are determined through imaging data. The acetabular cup 10 fits well with the bone on a large area, thereby ensuring the initial stability of the prosthesis. After the acetabular cup 10 is placed during the operation, the position of the inner 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 position of the center of the ball (center of rotation) of the inner liner 20 is adjusted. Then, a filling member 40 is filled in the adjustment interval between the inner liner 20 and the installation groove 11 to fix the inner liner 20, thereby ensuring the stability and biomechanical performance of the acetabular prosthesis.

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

[0039] As Figure 1 shown, an iliac bone connection part 12 is provided on the outer side wall of the acetabular cup 10, and the iliac bone connection part 12 is located on the first side of the acetabular cup 10 in the long axis direction of the elliptical structure. During the actual operation, due to the limited exposed bone, it is not convenient to place the prosthesis flexibly. If there is a large area of bone defect at the patient's iliac bone, the iliac bone connection part 12 is used to connect with the iliac bone, increasing the connection and contact area between the acetabular cup 10 and the bone, improving the stability of the acetabular prosthesis, reducing the risk of sinking or rotation of the acetabular prosthesis, and improving the success rate of the operation and the patient's recovery effect.

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

[0041] As Figure 1As shown, the iliac bone connecting portion 12 includes an iliac wing plate 121, which is detachably arranged on the acetabular cup 10. An iliac bone connecting hole 1211 is provided on the iliac wing plate 121. An angle adjusting structure 50 is provided between the acetabular cup 10 and the iliac wing plate 121 to adjust the included angle between the iliac wing plate 121 and the acetabular cup 10. By using the detachable and angle-adjustable iliac wing plate 121, a greater surgical error tolerance is provided for the acetabular prosthesis, enabling the acetabular prosthesis to better adapt to the irregular shape of the patient's bone quality after implantation, ensuring the stability and biomechanical performance of the acetabular prosthesis, and improving the flexibility and success rate of the surgery.

[0042] Specifically, the angle and position of the iliac wing plate 121 are designed according to the patient's bone quality before the operation. During the operation, it is selected whether to install the iliac wing plate 121 and adjust the angle of the iliac wing plate 121 according to the actual situation, so as to increase the fitting degree between the iliac wing plate 121 and the iliac bone quality. Finally, a fastener is passed through the iliac bone connecting hole 1211 and connected to the iliac bone quality to fix the iliac wing plate 121 on the iliac bone, prevent the rotation of the acetabular prosthesis, prevent the acetabular prosthesis from sinking after implantation, and ensure the initial stability of the acetabular prosthesis.

[0043] Specifically, the part of the acetabular cup 10 in contact with the iliac wing plate 121 adopts a solid structure, and no porous structure is provided in this part. The axial direction of the iliac bone connecting hole 1211 is approximately perpendicular to the iliac wing plate 121.

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

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

[0046] Such as Figure 2 and Figure 3As shown, positioning posts 1212 are provided on the iliac wing plate 121. The positioning posts 1212 are perpendicular to the iliac wing plate 121. Positioning holes 13 are provided on the outer side wall of the acetabular cup 10. The positioning posts 1212 are rotatably inserted through the positioning holes 13 around their axes. The angle adjustment structure 50 includes an adjustment post 51 and a plurality of adjustment holes 52. The adjustment post 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. The adjustment post 51 is selectively inserted through one of the plurality of adjustment holes 52. Specifically, during the operation, through the cooperation of the positioning posts 1212 and the positioning holes 13, a stable rotation axis is provided for the angle adjustment of the iliac wing plate 121. After the angle adjustment is in place, the adjustment post 51 is inserted through the corresponding adjustment hole 52 to fix the angle of the iliac wing plate 121.

[0047] Among them, the central angle between any two adjacent adjustment holes 52 relative to the center of the positioning hole 13 is 30°.

[0048] As Figure 1 shown, the iliac connection part 12 further includes an iliac bone patch 122 provided on the outer surface of the acetabular cup 10. During actual surgery, due to limited exposed bone mass, it is not convenient to flexibly place the prosthesis. If there is a large area of bone defect in the patient's iliac bone, the shape and position of the iliac bone patch 122 are designed according to the determined bone defect condition of the patient's iliac bone before the operation, so that the iliac bone patch 122 can fill the corresponding iliac bone defect bone mass, increase the contact area between the acetabular cup 10 and the bone mass, improve the fixation effect of the acetabular cup 10 on the bone mass, be beneficial to the initial stability of the acetabular prosthesis, and avoid causing the patient to undergo surgery again.

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

[0050] In this embodiment, the acetabular cup 10 and the iliac bone patch 122 adopt an integrally formed structure, which improves the biomechanical properties of the acetabular prosthesis.

[0051] As Figure 2As shown, mounting hole groups 123 and spare hole groups 124 are provided on the iliac bone patch 122. The spare hole groups 124 are arranged on the side of the mounting hole groups 123 away from the iliac wing plate 121. The mounting hole groups 123 include at least two mounting holes, and the spare hole groups 124 include at least two spare holes. The mounting hole groups 123 and the spare hole groups 124 provide multiple fixing methods. During the operation, the mounting hole groups 123 or the spare hole groups 124 are selected according to the actual situation to fix the iliac bone patch 122 and the acetabular cup 10. If the mounting hole groups 123 cannot be installed in place, the spare hole groups 124 are used to prevent inaccurate placement of the prosthesis during the operation, 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. At this time, the total thickness of the acetabular cup 10 and the iliac bone patch 122 is between 4 mm and 6 mm. Among them, 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. With the above thickness range, it is avoided that the side length of the nail holes of the mounting hole groups 123 and the spare hole groups 124 is too long due to excessive thickness, improving the accuracy of the direction of placing screws in the mounting hole groups 123 or the spare hole groups 124 during the operation and playing a role in weight reduction.

[0053] Specifically, the arrangement directions of at least two mounting holes are parallel to the iliac wing plate 121, the arrangement directions of at least two spare holes are parallel to the iliac wing plate 121, and both the mounting holes and the spare holes extend towards the iliac cancellous bone.

[0054] As Figure 1 shown, the acetabular prosthesis further includes an ischial bone patch 60. The ischial bone patch 60 is arranged on the second side of the acetabular cup 10 in the long axis direction of the elliptical structure. An assembly groove 61 is provided on the side of the ischial bone patch 60 facing the acetabular cup 10. An installation platform 14 adapted to the assembly groove 61 is provided on the outer wall of the acetabular cup 10. The installation platform 14 extends into the assembly groove 61 and is connected to the acetabular cup 10. During the actual operation, due to limited exposed bone mass, it is not convenient to flexibly place the prosthesis. When there is a large area of bone defect in the patient's ischium, the shape and position of the ischial bone patch 60 are designed according to the determined bone defect situation of the patient's ischium before the operation, so that the ischial bone patch 60 can fill the corresponding ischial bone defect, increasing the contact area between the acetabular cup 10 and the bone mass, improving the fixation effect of the acetabular cup 10 on the bone mass, being beneficial to the initial stability of the acetabular prosthesis, reducing the risk of sinking or rotation of the acetabular prosthesis, and improving the success rate of the operation and the rehabilitation effect of the patient.

[0055] Among them, through the cooperation of the assembly groove 61 of the ischial bone patch 60 and the installation platform 14 of the acetabular cup 10, the fitting degree between the ischial bone patch 60 and the acetabular cup 10 is improved, realizing the precise connection between the ischial bone patch 60 and the acetabular cup 10 and improving the stability of the acetabular prosthesis.

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

[0057] As Figure 1 shown, a first bone cement filling layer is provided between the ischial patch 60 and the acetabular cup 10. If the bone defect at the patient's ischium is severe and cannot meet the strength required to connect the ischial patch, an additional mechanical fixation is provided by setting the first bone cement filling layer to promote the biological fusion of the ischial patch 60 and the acetabular cup 10 and improve the stability of the acetabular prosthesis.

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

[0059] As Figure 1 shown, the acetabular prosthesis further includes a first connecting member, which passes through the mounting table 14 and the ischial patch 60 and is threadedly connected to the acetabular cup 10. The threaded connection between the first connecting member and the acetabular cup 10 is filled with a second bone cement filling layer. Since the bone defect at the ischium of some patients is severe and the ischial patch cannot be fixed to the bone by screws, screws and bone cement are used in combination to play a role in connection and fixation, connecting and fixing the acetabular cup and the ischial patch. First, screw in, then pour bone cement, and tighten before it solidifies.

[0060] Specifically, first screw in the first connecting member, which passes through the mounting table 14 and the ischial patch 60 and is threadedly connected to the acetabular cup 10, then pour bone cement, and tighten the first connecting member before the bone cement solidifies to form the first bone cement filling layer and the second bone cement filling layer.

[0061] In this embodiment, both the mounting table 14 and the assembly groove 61 adopt a conical structure. In the direction in which the mounting table 14 extends into the assembly groove 61, the cross-sectional dimensions of both the mounting table 14 and the assembly groove 61 gradually decrease. By setting the ischial patch 60 and the acetabular cup 10 separately, it is avoided that they are too large in volume and not easy to place. Both the mounting table 14 and the assembly groove 61 adopt a conical structure to avoid the problem that the cooperation between the ischial patch 60 and the acetabular cup 10 is likely to be loose and unstable, which not only ensures the convenience of placing the prosthesis but also ensures the initial stability of the prosthesis. Moreover, the conical structures of both the mounting table 14 and the assembly groove 61 also play a role in installation positioning.

[0062] As Figure 1As shown, the acetabular prosthesis further includes a pubic bone patch 70. The pubic bone patch 70 is disposed on the second side of the acetabular cup 10 in the long axis direction of the elliptical structure, and the pubic bone patch 70 is detachably connected to the acetabular cup 10. During actual surgery, due to limited exposed bone mass, it is not convenient to flexibly place the prosthesis. When there is a large area of bone defect in the patient's pubic bone, the shape and position of the pubic bone patch 70 are designed according to the determined bone defect condition of the patient's pubic bone before surgery. During the operation, the pubic bone patch 70 is used to fit with the pubic bone mass. The pubic bone patch 70 adapts to the irregular shape of the patient's pubic bone mass, realizing the personalized matching of the acetabular prosthesis and the patient's bone mass, increasing the contact area between the acetabular cup 10 and the bone mass, improving the stability of the acetabular prosthesis, reducing the risk of subsidence or rotation of the acetabular prosthesis, and improving the success rate of the surgery and the rehabilitation effect of the patient.

[0063] In this embodiment, a first connection through-hole is provided on the pubic bone patch 70. The first connection through-hole includes a first threaded hole section and a first counterbore section that are communicated with each other. The first counterbore section is located on the side of the first threaded hole section away from the acetabular cup 10, and the aperture of the first counterbore section is larger than the aperture of the first threaded hole section. A second connection through-hole is provided on the acetabular cup 10. The second connection through-hole includes a second threaded hole section and a second counterbore section that are communicated with each other. The aperture of the second counterbore section is larger than the aperture of the second threaded hole section. The second counterbore section is located on the side of the second threaded hole section away from the pubic bone patch 70. The acetabular prosthesis further includes a second connecting member. The second connecting member includes a screw rod and a screw head. The screw rod passes through the first connection through-hole and the second connection through-hole, and the screw rod is in threaded cooperation with the first threaded hole and the second threaded hole respectively. The screw head is located in the first counterbore or the second counterbore. Both the first connection through-hole and the second threaded hole face the cancellous bone of the pubis.

[0064] As Figure 1 shown, the filling member 40 includes a filling patch 41 and a third bone cement filling layer. The filling patch 41 is disposed in the adjusting space 30. The third bone cement filling layer is clamped between the outer sidewall of the inner liner 20 and the wall of the installation groove 11, and / or the third bone cement filling layer is clamped between the outer sidewall of the inner liner 20 and the outer sidewall of the filling patch 41, and / or the third bone cement filling layer is clamped between the wall of the installation groove 11 and the outer sidewall of the filling patch 41. By using the cooperation of the filling patch 41 and the third bone cement filling layer, the stable fixation of the inner liner 20 in the installation groove 11 is realized, 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 installation groove 11, and then the inner liner 20 is placed in the installation groove 11 and the position of the inner liner 20 is adjusted. After the position adjustment is in place, the filling patch 41 and / or bone cement are supplemented in the adjusting space between the inner liner 20 and the installation groove 11 to fix the inner liner 20, thereby ensuring the stability and biomechanical performance of the acetabular prosthesis.

[0066] In this embodiment, a gripper hole is provided on the inner liner 20. During actual surgery, due to the limited exposed bone mass, the doctor cannot easily hold the inner liner 20 by hand and directly place it into the human body. By using the gripper hole, it is convenient for the doctor to use tools to place the inner liner 20 during the operation.

[0067] In this embodiment, a porous structure is also provided on the bone contact surface of the acetabular cup 10, the bone contact surface of the ischial patch 60, and the bone contact surface of the pubic patch 70, which is beneficial for bone ingrowth in the middle and late stages and improves the stability of the acetabular prosthesis in the middle and late stages.

[0068] In this embodiment, the iliac connection portion 12, the ischial 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 ring-point-column theory of acetabular reconstruction: the initial stability of non-cemented acetabular reconstruction comes from "ring fixation" or "three-point fixation", and the integrity of the anterior and posterior columns of the acetabulum, especially the posterior column, plays a crucial role in determining the supporting ability of the fixation points. "Three-point fixation" refers to the bone mass near the acetabular rim. Under the premise of existing defects, if there are three stable points, it can still provide sufficient initial stability for the acetabular cup. "Ring 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, first place the ischial patch at the ischium, and then place the acetabular cup. When placing the acetabular cup, pay attention to the accurate matching of the taper fit structure between the acetabular cup and the ischial patch. After placing the acetabular cup, fix the acetabular cup, connect the acetabular cup and the ischial patch with screws. At the same time, fill bone cement into the screw holes at the ischial part of the acetabular cup and the screw holes of the ischial patch to ensure the initial stability of the ischial patch. The directions of the above screw holes are all convenient for the doctor to implant screws during the operation on the premise of ensuring the connection strength between the prosthesis and the bone mass.

[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, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] Unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof in subsequent drawings is not necessary.

[0072] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc., is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

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

[0074] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it should not be construed as limiting the protection scope of the present invention.

[0075] The above are only the preferred embodiments of the present invention and are 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 within the protection scope of the present invention.

Claims

1. An acetabular prosthesis, characterized in that, The acetabular prosthesis includes: An acetabular cup (10), the inner side of the acetabular cup (10) having a mounting groove (11); A liner (20), the liner (20) being disposed in the mounting groove (11) in a position-adjustable manner in a direction perpendicular to the inner and outer direction of the acetabular cup (10), there being an adjustment gap (30) between the outer side wall of the liner (20) and the groove wall of the mounting groove (11); A filling member (40), 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); The mounting groove (11) adopts a semi-ellipsoidal structure, the semi-ellipsoidal structure protruding outward in the inner and outer direction of the acetabular cup (10), the notch of the mounting groove (11) being an elliptical structure, the major axis direction of the elliptical structure being disposed at an angle to the inner and outer direction of the acetabular cup (10), and the minor axis direction of the elliptical structure being disposed at an angle to the inner and outer direction of the acetabular cup (10); An iliac bone connecting portion (12) is provided on the outer side wall of the acetabular cup (10), the iliac bone connecting portion (12) being located on the first side of the acetabular cup (10) in the major axis direction of the elliptical structure; The iliac bone connecting portion (12) includes an iliac bone wing plate (121), the iliac bone wing plate (121) being detachably disposed on the acetabular cup (10), the portion of the acetabular cup (10) in contact with the iliac bone wing plate (121) adopting a solid structure, the iliac bone wing plate (121) being provided with an iliac bone connecting hole (1211), an angle adjustment structure (50) being provided between the acetabular cup (10) and the iliac bone wing plate (121) to adjust the angle between the iliac bone wing plate (121) and the acetabular cup (10), the iliac bone wing plate (121) being provided with a positioning post (1212), the positioning post (1212) being perpendicular to the iliac bone wing plate (121), a positioning hole (13) being provided on the outer side wall of the acetabular cup (10), the positioning post (1212) being rotatably disposed through the positioning hole (13) around its axis, the angle adjustment structure (50) including an adjustment post (51) and a plurality of adjustment holes (52), the adjustment post (51) being provided on one of the iliac bone wing plate (121) and the acetabular cup (10), the plurality of adjustment holes (52) being provided on the other of the iliac bone wing plate (121) and the acetabular cup (10), the plurality of adjustment holes (52) being arranged along the rotation direction of the iliac bone wing plate (121) relative to the acetabular cup (10), the adjustment post (51) being selectively disposed through one of the plurality of adjustment holes (52), and the central angle between any two adjacent adjustment holes (52) relative to the center of the positioning hole (13) being 30°.

2. The acetabular prosthesis according to claim 1, wherein The size of the adjustment gap (30) in the major axis direction of the elliptical structure is greater than the size of the adjustment gap (30) in the minor axis direction of the elliptical structure.

3. The acetabular prosthesis according to claim 1, wherein The iliac bone connecting portion (12) further includes an iliac bone patch (122) disposed on the outer surface of the acetabular cup (10).

4. The acetabular prosthesis according to claim 3, wherein a porous structure (1221) is disposed on the outer surface of the iliac bone patch (122); and / or the acetabular cup (10) and the iliac bone patch (122) adopt an integrally formed structure; and / or mounting hole groups (123) and spare hole groups (124) are disposed on the iliac bone patch (122), the spare hole groups (124) are disposed on a side of the mounting hole groups (123) away from the iliac bone wing plate (121), the mounting hole groups (123) include at least two mounting holes, and the spare hole groups (124) include at least two spare holes.

5. The acetabular prosthesis according to claim 1, wherein, The acetabular prosthesis further includes an ischial bone patch (60), the ischial bone patch (60) is located on a second side of the acetabular cup (10) in the long axis direction of the elliptical structure of the acetabular cup (10), an assembly groove (61) is disposed on a side of the ischial bone patch (60) facing the acetabular cup (10), a mounting platform (14) adapted to the assembly groove (61) is disposed on an 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).

6. The acetabular prosthesis according to claim 5, wherein a first bone cement filling layer is disposed between the ischial bone patch (60) and the acetabular cup (10); and / or the acetabular prosthesis further includes a first connecting member, the first connecting member passes through the mounting platform (14) and the ischial bone patch (60) and is threadedly connected to the acetabular cup (10), and a second bone cement filling layer is filled at a threaded connection portion between the first connecting member and the acetabular cup (10); and / or both the mounting platform (14) and the assembly groove (61) adopt a conical structure, and in a direction in which the mounting platform (14) extends into the assembly groove (61), cross-sectional dimensions of the mounting platform (14) and the assembly groove (61) both gradually decrease.

7. The acetabular prosthesis according to claim 1, wherein The acetabular prosthesis further includes a pubic bone patch (70), the pubic bone patch (70) is disposed on a second side of the acetabular cup (10) in the long axis direction of the elliptical structure, and the pubic bone patch (70) is detachably connected to the acetabular cup (10).

8. The acetabular prosthesis according to claim 7, characterized in that, A first connection through hole is disposed on the pubic bone patch (70), the first connection through hole includes a first threaded hole section and a first counterbore section that are communicated with each other, the first counterbore section is located on a side of the first threaded hole section away from the acetabular cup (10), a diameter of the first counterbore section is larger than a diameter of the first threaded hole section, a second connection through hole is disposed on the acetabular cup (10), the second connection through hole includes a second threaded hole section and a second counterbore section that are communicated with each other, a diameter of the second counterbore section is larger than a diameter of the second threaded hole section, the second counterbore section is located on a side of the second threaded hole section away from the pubic bone patch (70), and the acetabular prosthesis further includes a second connecting member, and the second connecting member includes: A screw is inserted through the first connection through-hole and the second connection through-hole, and the screw is in threaded fit with the first threaded hole section and the second threaded hole section respectively; A screw head is located in the first counterbore section or the second counterbore section.

9. The acetabular prosthesis according to claim 1, characterized in that, The filling member (40) includes a filling patch (41) and a third bone cement filling layer. The filling patch (41) is arranged in the adjusting space (30), and the third bone cement filling layer is clamped between the outer side wall of the inner lining (20) and the wall of the installation groove (11), and / or the third bone cement filling layer is clamped between the outer side wall of the inner lining (20) and the outer side wall of the filling patch (41), and / or the third bone cement filling layer is clamped between the wall of the installation groove (11) and the outer side wall of the filling patch (41).

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