CN114343921B

CN114343921B - Acetabular component, hip prosthesis and assembly method

Info

Publication number: CN114343921B
Application number: CN202111679032.5A
Authority: CN
Inventors: 王春; 曾超; 丁正; 石杜芳; 刘梦星
Original assignee: Wuhan Mindray Technology Co Ltd
Current assignee: Wuhan Mindray Technology Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-02-03
Anticipated expiration: 2041-12-31
Also published as: CN114343921A

Abstract

The application discloses an acetabular component, a hip prosthesis and a method of assembly. The acetabulum assembly comprises an acetabulum outer cup and an acetabulum inner liner, wherein the acetabulum outer cup comprises a first inner wall and a first outer wall, the first inner wall is provided with a fixing groove, and the fixing groove extends along the circumferential direction of the first inner wall; the acetabulum inside lining includes second inner wall and second outer wall, and the second outer wall is provided with the fixed part, the fixed part extends along second outer wall circumference, and the fixed part can adapt to the fixed slot, and at least some of fixed part can the joint in the fixed slot. When the acetabulum assembly is in a pre-installation state, the acetabulum inner liner can be completely placed in a first accommodating space formed by the first inner wall of the acetabulum outer cup, and the fixing part arranged on the outer wall of the acetabulum inner liner is clamped in the fixing groove of the acetabulum outer cup by enabling the acetabulum inner liner and the acetabulum outer cup to rotate relatively, so that the acetabulum inner liner and the acetabulum outer cup can be fixedly locked.

Description

Acetabular component, hip prosthesis and assembly method

Technical Field

The application belongs to the field of medical instruments, and particularly relates to an acetabular component, a hip joint prosthesis and an assembling method.

Background

Total hip replacement surgery typically requires removal and replacement of the femoral head and acetabulum. An acetabular assembly for replacing an acetabulum may include an outer cup and a liner. The outer cup is used for connecting and fixing with the patient's hipbone, and the inner liner can be fixed in the outer cup. In order to fix the outer cup and the inner liner, a snap locking mechanism is generally adopted in the related art, and the inner liner is limited to be separated from the outer cup through the snap. The relatively common buckle structure is a plum blossom-shaped raised structure of an acetabular liner facility, a plum blossom-shaped clamping groove is arranged at a corresponding position of an acetabular outer cup, downward acting force along the axial direction is applied to the acetabular liner through an installer during assembly, and the acetabular liner is knocked into the outer cup based on plastic deformation of the acetabular liner. Due to the fact that the size difference between the inner lining protrusion and the outer cup clamping groove is large, axial displacement of the inner lining in the outer cup is large, large micromotion is brought, and the back side of the inner lining is abraded. In addition, due to the existence of tolerance, the plum petal bulges of the lining are in clearance fit with the clamping grooves of the outer cup, and the lining has rotation micromotion in the outer cup, so that the back side of the lining is worn.

In addition, in the assembling process, the liner is knocked and driven into the outer cup by applying downward acting force along the axis direction to the acetabular liner through the installer, the knocking force is high, the acetabular liner is easy to deform in the knocking process, and the risk that the ball head of the hip joint prosthesis is stuck in the acetabular liner is increased. Moreover, the existing buckle structure can only remove the acetabulum lining destructively in the operation.

Disclosure of Invention

The utility model provides an acetabular component, hip joint prosthesis and assembly method can avoid the acetabular lining dorsal side wearing and tearing that leads to because of the percussion force when the equipment in acetabular component assembling process, reduces acetabular lining and warp.

In a first aspect, the present application provides an acetabular component comprising: an acetabulum outer cup and an acetabulum inner lining,

the acetabulum outer cup comprises a first inner wall and a first outer wall, wherein the first inner wall surrounds to form a first accommodating space; a fixing groove is formed in the first inner wall of the acetabulum outer cup and extends along the circumferential direction of the first inner wall;

the acetabulum liner comprises a second inner wall and a second outer wall, the acetabulum liner can be contained in the first containing space, the second outer wall is provided with a fixing part, the fixing part extends along the circumferential direction of the second outer wall, the fixing part can be adapted to the fixing groove, and at least one part of the fixing part can be clamped in the fixing groove;

wherein the acetabular component has a pre-installed state in which the acetabular liner is received in the first receiving space and the acetabular liner is relatively movable with respect to the acetabular outer cup, in which pre-installed state the acetabular liner is fully received in the first receiving space.

Optionally, one end of the fixing groove is provided with a first opening, and the fixing portion can slide into the fixing groove through the first opening.

Optionally, the first opening of the fixing groove is arranged along a horizontal direction, and the fixing portion is arranged along the horizontal direction towards one end of the first opening of the fixing groove.

Optionally, the fixing portion is a deformable material.

Optionally, the acetabular outer cup has a first end surface defined by the first outer wall and the first inner wall, the first inner wall is provided with an avoidance groove, the avoidance groove has a side wall, the side wall is retracted from a part of the surface of the first inner wall to the direction of the first outer wall and extends to the first end surface, and the avoidance groove can accommodate the fixing portion.

Optionally, the dodging groove is adjacent to the fixing groove, the dodging groove is connected with the side wall and a bottom surface of the first inner wall, the bottom surface is connected with the bottom surface of the fixing groove, and the first opening of the fixing groove faces the dodging groove.

Optionally, the fixing groove is circumferentially arranged along the first inner wall and extends in a horizontal direction; the fixing portion is arranged along the circumferential direction of the second outer wall and extends in the horizontal direction.

Optionally, the fixing groove is circumferentially arranged along the first inner wall and extends at a first included angle with the horizontal direction, and the fixing portion is circumferentially arranged along the second outer wall and extends along the horizontal direction;

or, the fixed part is followed second inner wall circumference sets up and is first contained angle extension with the horizontal direction, the fixed slot is followed first inner wall circumference sets up and extends along the horizontal direction.

Optionally, the fixed part includes guide part and locking part, the guide part set up in the fixed part orientation first open-ended one side, the guide part extends along the horizontal direction, and locking part is connected with the guide part and sets up and keep away from in the fixed part first open-ended one side, and locking part is the second contained angle with the horizontal direction and extends towards keeping away from first open-ended one side.

Optionally, the first included angle is 1-30 degrees; or the second included angle is 1-30 degrees.

Optionally, the first included angle is 3-5 degrees; or the second included angle is 3-5 DEG

Optionally, the inner wall of the fixing groove is provided with a first anti-disengaging part, and the outer surface of the fixing part is provided with a second anti-disengaging part matched with the first anti-disengaging part.

Optionally, the number of the fixing grooves is multiple, the fixing grooves are uniformly distributed along the circumferential direction of the first inner wall, and one side of the first opening of each fixing groove is provided with one avoidance groove; and/or the quantity of fixed part is a plurality of, and is a plurality of the fixed slot is followed the circumference evenly distributed of second outer wall.

Optionally, the second outer wall is provided with a plurality of the fixing portions, and one end of any two adjacent fixing portions facing the first opening is separated by a predetermined angle, the predetermined angle is defined by an included angle between connecting lines from one end of each two adjacent fixing portions facing the first opening to the axis of the acetabular liner, and the predetermined angle is between 10 ° and 150 °.

Optionally, the acetabular outer cup has the first end surface defined by the first outer wall and the first inner wall, and the acetabular liner has the second end surface defined by the second outer wall and the second inner wall, wherein the first end surface is provided with a first positioning mark, the second end surface is provided with a second positioning mark, and a relative position of the first positioning mark and the second positioning mark indicates whether the acetabular outer cup and the acetabular liner are in a locked state.

Optionally, the acetabular outer cup has the first end surface defined by the first outer wall and the first inner wall, the acetabular liner has the second end surface defined by the second outer wall and the second inner wall, and the first end surface is provided with one or more mounting holes.

In a second aspect, the present application provides a hip prosthesis comprising:

the acetabular component as described above; and

and the femoral head prosthesis is used for being matched and installed with the acetabulum liner.

In a third aspect, the application provides an assembling method based on the acetabular component, which includes: placing the acetabular liner completely into the first receiving space to place the acetabular component in a pre-installed state; and applying a rotating force to the acetabulum inner liner along the circumferential direction to enable the acetabulum inner liner to rotate relative to the acetabulum outer cup, so that the fixing part is clamped in the fixing groove.

Optionally, the placing the acetabular liner completely into the first receiving space to place the acetabular component in the pre-installed state comprises: aligning an avoidance slot of the acetabular outer cup with a fixation portion of the acetabular liner to enable full placement of the acetabular liner into the first receiving space to place the acetabular component in the pre-installation state.

The acetabular component provided by the embodiment of the application is in a pre-installation state, the acetabular lining can be completely placed in the first accommodating space of the acetabular outer cup, and the fixing part arranged on the outer wall of the acetabular lining is clamped in the fixing groove of the acetabular outer cup through relative rotation of the acetabular lining and the acetabular outer cup, so that the acetabular lining and the acetabular outer cup can be fixed and locked, and the defects of deformation and inner side abrasion of the acetabular lining caused by overlarge tapping force in the assembling process caused by the clamping structure of the existing acetabular component are at least overcome.

Drawings

The following detailed description of specific embodiments of the present application is provided by way of example only and is not intended to limit the present application in any way with reference to the accompanying drawings.

FIG. 1 is a schematic view of an assembly structure of an acetabular component according to an embodiment of the application;

FIG. 2 is a schematic structural view of a hip prosthesis provided in an embodiment of the present application;

FIG. 3 is an exploded view of an acetabular component provided by an embodiment of the present application;

FIG. 4 is an elevation view of the acetabular liner of the acetabular assembly of FIG. 3;

FIG. 5 is an exploded view of an acetabular component provided according to yet another embodiment of the present application;

FIG. 6 is a cross-sectional view of the acetabular outer cup of the acetabular assembly shown in FIG. 5;

FIG. 7 is an exploded view of an acetabular component provided in accordance with another embodiment of the present application;

FIG. 8 is an elevation view of the acetabular liner of the acetabular assembly of FIG. 7;

FIG. 9 is an exploded view of an acetabular component provided in accordance with another embodiment of the present application;

FIG. 10 is a front view of the acetabular liner of the acetabular assembly of FIG. 9;

FIG. 11 is a top view of the acetabular assembly of FIG. 1;

figure 12 is a top view of an acetabular liner of the acetabular assembly shown in figure 1.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application and the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides an acetabulum assembly which is applied to a hip joint prosthesis. Hip prostheses are used to replace the hip joint in the body of a user. For example, for some patients, when the hip joint is damaged due to disease or trauma, the lesion may be surgically removed and a corresponding hip prosthesis may be used to replace the resected hip joint of the patient.

Referring to fig. 1 and 2, fig. 1 is an assembly view of an acetabular component provided in an embodiment of the present disclosure, and fig. 2 is a structural schematic view of a hip prosthesis provided in an embodiment of the present disclosure.

As shown in fig. 1, 2 and 3, the acetabular assembly 100 may include an acetabular outer cup 11 and an acetabular inner liner 12. The acetabular cup 11 is intended to be fitted and fixed to the pelvic bone of a patient. The acetabular outer cup 11 has a first receiving space 110 with an open end, and the acetabular liner 12 is at least partially received and fixed in the first receiving space 110. The acetabular liner 12 has a second receiving space 120, and the opening direction of the second receiving space 120 is the same as the opening direction of the first receiving space 110. The ball of the femoral head prosthesis can be rotatably mounted in the second receiving space 120. The acetabular component 100 is secured to the patient's pelvis, a femoral head prosthesis is positioned at the patient's femur, and the femoral head prosthesis is rotatably coupled to the acetabular component 100 via a ball head to replace the patient's resected hip joint.

As one embodiment, shown in fig. 3, the acetabular assembly 100 includes an acetabular outer cup 11 and an acetabular inner liner 12. The acetabular cup 11 has a first inner wall 111 and a first outer wall 112, the first inner wall 111 enclosing a first receiving space 110. The first inner wall 111 of the acetabular outer cup 11 is provided with a fixation groove 113, the fixation groove 113 extending circumferentially along the first inner wall 111. The acetabular liner 12 has a second inner wall 121 and a second outer wall 122, the acetabular liner 12 can be accommodated in the first accommodating space 110, the second outer wall 122 of the acetabular liner 12 is provided with a fixing portion 123, the fixing portion 123 extends along the circumference of the second outer wall 122, the fixing portion 123 can be adapted to the fixing groove 113, for example, at least a portion of the fixing portion 123 can be clamped in the fixing groove 113. Further, when the acetabular liner 12 is completely fitted into the first receiving space 110 and fixed, the fixing portion 123 abuts against the inner wall of the fixing groove 113, thereby restricting the acetabular liner 12 from moving linearly relative to the acetabular cup 11 in the axial direction of the acetabular cup 11.

After the acetabular liner 12 is completely installed in the first receiving space 110 and is clamped and fixed, the fixing groove 113 and the fixing portion 123 are matched to fix the acetabular liner 12 and the acetabular outer cup 11.

In some embodiments, the acetabular component 100 has a pre-installation state in which the acetabular liner 12 is received in the first receiving space 110 and the acetabular liner 12 is relatively movable with respect to the acetabular cup 11, in which the acetabular liner 12 is completely received in the first receiving space 110 but the acetabular liner 12 and the acetabular cup 11 are not locked.

As shown in fig. 3, 5 and 7, the acetabular cup 11 has a first end surface 115 defined by the first outer wall 112 and the first inner wall 111, it being understood that the first end surface 115 is the surface that connects the first outer wall 112 and the first inner wall 111. The first inner wall 111 of the acetabular outer cup 11 is provided with an avoiding groove 114, the avoiding groove 114 is provided with a side wall 1141, and the side wall 1141 is formed by retracting from a part of the surface of the first inner wall 111 to the direction of the first outer wall 112 and extending to the first end surface 115 of the acetabular outer cup 11; when the acetabular liner 12 moves linearly along the axial direction of the acetabular cup 11, the avoiding groove 114 of the first inner wall 111 can avoid the fixing part 123 of the second outer wall 122, so as to avoid the problem that the acetabular liner 12 is difficult to be completely placed in the first accommodating space 110 of the acetabular cup 11 due to the blocking of the fixing part 123 by the acetabular cup 11.

Referring to FIG. 7, the bypass groove 114 has a bottom surface 1142 defined by the side wall 1141 of the bypass groove 114 and the first inner wall 111 of the acetabular cup 11, and the bottom surface 1142 connects the side wall 1141 of the bypass groove 114 and the first inner wall 111 of the acetabular cup 11. The avoiding groove 114 is disposed adjacent to the fixing groove 113, the bottom surface 1142 is connected to the bottom surface 1142 of the fixing groove 113, and one end of the fixing groove 113 facing the avoiding groove 114 has a first opening 1131, so that the avoiding groove 114 is communicated with the fixing groove 113, and the fixing portion 123 of the acetabular liner 12 can be rotatably engaged with the fixing groove 113 by the avoiding groove 114 under the action of a rotating force.

In some embodiments, the relief groove 114 is a chamfer formed by the first end surface 115 down the first inner wall 111.

It is understood that the length of the bypass groove 114 is equal to or greater than the length of the fixing portion 123, such that when the acetabular component 100 is assembled, the bypass groove 114 can completely receive the fixing portion 123, and the acetabular liner 12 can be completely placed in the first receiving space 110.

In some embodiments, the fixing portion 123 is protruded from the outer surface of the second outer wall of the acetabular liner 12. The fixing groove 113 is concavely formed on the surface of the first inner wall 111 of the acetabular cup 11.

During assembly of the acetabular component 100, the securing portion 123 of the acetabular liner 12 is first aligned with the relief groove 114 of the acetabular shell 11 to allow the acetabular liner 12 to be fully placed into the first receiving space 110. The acetabular liner 12 of the acetabular liner 12 can be in a pre-installed state in which it is placed into the first receiving space 110 of the acetabular cup 11, in which case the acetabular liner 12 is only placed into the first receiving space 110 from the opening of the acetabular cup 11 and is not yet locked. In the pre-installed state, the fixing portion 123 of the acetabular liner 12 corresponds to the offset groove 114 of the acetabular cup 11 in the axial direction of the acetabular cup 11, so that the fixing portion 123 of the acetabular liner 12 is not obstructed by any part of the acetabular cup 11, and the acetabular liner 12 can be completely inserted into the first receiving space 110. The fixing portion 123 of the acetabular liner 12 is opposite the first opening 1131 of the fixation slot 113 of the acetabular cup 11 in the circumferential direction of the acetabular cup 11 so that the fixing portion 123 of the acetabular liner 12 can be rotationally snapped into the fixation slot 113 under the effect of a rotational force. At this time, a rotational force is applied to the acetabular liner 12 toward the fixing groove 113 in the circumferential direction of the acetabular cup 11, so that the acetabular liner 12 is rotated in the direction toward the fixing groove with respect to the acetabular cup 11, and the fixing portion 123 of the acetabular cup 11 is screwed into the fixing groove 113 of the acetabular cup 11.

Therefore, in the acetabular component 100 provided by the embodiment of the application, in the pre-installation state, the acetabular liner 12 can completely enter the first accommodation space 110 of the acetabular cup 11, and in the installation state, the acetabular liner 12 and the acetabular cup 11 are locked by rotating the acetabular liner 12, and in the installation process, no force needs to be applied downwards along the axial direction of the acetabular cup 11 or the acetabular liner 12 does not need to be knocked, so that the risk of jamming of the second outer wall 122 and the first inner wall 111 is reduced, and deformation of the acetabular liner 12 under the influence of strong force and abrasion of the back side of the acetabular liner 12 are avoided. After the acetabular liner 12 and the acetabular cup 11 are fixed, the fixing portion 123 of the acetabular liner 12 abuts against the inner wall of the fixing groove 113 of the acetabular cup 11, so that the acetabular liner 12 is restricted from moving linearly relative to the acetabular cup 11 along the axial direction of the acetabular cup 11.

In some embodiments, in order to limit the linear movement of the acetabular liner 12 relative to the acetabular cup 11 along the axial direction of the acetabular cup 11 and limit the rotation of the acetabular liner 12 relative to the acetabular cup 11 along the circumferential direction of the acetabular cup 11, the fixing portion 123 and the fixing groove 113 are in transition fit or interference fit, and a certain amount of rotational force is applied to press the fixing portion 123 into the fixing groove 113 to be clamped and locked. As an example, the fixing portion 123 is a deformable material including a plastic deformation material, a pressure deformation material, or the like, such as polyethylene, rubber, or the like. Under the action of the rotational force, the fixing portion 123 of the acetabular liner 12 is rotated into the fixing groove 113, and is deformed by the extrusion of the inner wall of the fixing groove 113 and abuts against the inner wall of the fixing groove 113, so that the relative movement of the acetabular liner 12 and the acetabular cup 11 in any direction is limited, and the acetabular liner 12 is locked and fixed in the acetabular cup 11.

It will be appreciated that when it is desired to remove the acetabular liner 12, a rotational force is applied to the acetabular liner 12 in a direction circumferentially away from the retaining groove 113 of the acetabular cup 11 such that the acetabular liner 12 rotates in a reverse direction relative to the acetabular cup 11, rotating the retaining portion 123 out of the retaining groove 113 to the relief groove 114 and allowing removal of the acetabular liner 12.

For example, the first accommodating space 110 may be a hemispherical groove, the first accommodating space 110 may also be a truncated cone-shaped groove, and the first accommodating space 110 may also be a groove with a truncated cone-shaped end close to the notch and a hemispherical end far away from the notch. Therefore, the inner diameter of the first receiving space 110 is gradually reduced inward along the axis of the acetabular cup 11, that is, the portion of the inner wall of the acetabular cup 11 connected to the rim end surface of the acetabular cup 11 is inclined relative to the axis of the acetabular cup 11.

Referring to fig. 3 to 7, as an example, the fixing groove 113 is an elongated groove, and a length direction thereof extends along a circumferential direction of the first inner wall 111. Correspondingly, the fixing portion 123 is a long-strip-shaped protrusion, and the length direction of the fixing portion extends along the circumferential direction of the second outer wall 122, so that at least a portion of the fixing portion 123 can be clamped in the fixing groove 113.

In some embodiments, the first opening 1131 of the retaining groove 113 is disposed along a horizontal direction, and the end of the fixing portion 123 facing the first opening 1131 of the retaining groove 113 is disposed along the horizontal direction, so that the end of the fixing portion 123 facing the first opening 1131 of the retaining groove 113 can be conveniently screwed into the first opening 1131 when a rotational force is applied to the acetabular liner 12.

In some embodiments, the fixing groove 113 is circumferentially disposed along the first inner wall 111 and extends in a first direction, and the fixing portion 123 is circumferentially disposed along the second inner wall 121 and extends in a second direction. The first direction is the same as the second direction, or the first direction and the second direction form an included angle.

Referring to fig. 3 and 4, alternatively, the fixing groove 113 is disposed along the circumferential direction of the first inner wall 111 and extends in a horizontal direction; accordingly, the fixing portion 123 is disposed along the circumferential direction of the second outer wall 122 and extends along the horizontal direction, and is adapted to the fixing groove 113, so that the fixing portion 123 can be conveniently matched with the fixing groove 113 and clamped into the fixing groove 113 when a rotational force is applied to the acetabular liner 12. The fixing portion 123 is a deformable material including a plastic deformation material or a pressure deformation material, such as polyethylene, rubber, or the like. Under the action of the rotation force, the fixing portion 123 of the acetabular liner 12 is rotated into the fixing groove 113, is deformed by the extrusion of the inner wall of the fixing groove 113 and abuts against the inner wall of the fixing groove 113, so that the relative movement of the acetabular liner 12 and the acetabular cup 11 in any direction is limited, and the acetabular liner 12 is locked and fixed in the acetabular cup 11.

Referring to fig. 5 and 6, in another embodiment, the extending direction of the fixing groove 113 and the extending direction of the fixing portion 123 form a first included angle θ 1, that is, the first direction and the second direction form a first included angle θ 1. When a rotational force is applied to the acetabular liner 12, after one end of the fixing portion 123 enters the first opening 1131 of the fixing groove 113, as the rotational angle increases, the fixing portion 123 receives a lateral extrusion force from the inner wall of the fixing groove 113 generated by the first included angle θ 1, so that the friction between the fixing portion 123 and the fixing groove 113 increases until the fixing portion 123 is locked in a clamping manner, and further the relative movement of the acetabular liner 12 and the acetabular outer cup 11 in any direction is limited, thereby realizing the locking and fixing of the acetabular liner 12 relative to the acetabular outer cup 11.

Referring to fig. 5 and 6, the first opening 1131 of the fixing groove 113 is horizontally disposed, the fixing groove 113 extends along the circumferential surface of the first inner wall 111 at a first included angle θ 1 with the horizontal direction, and the fixing portion 123 is horizontally disposed along the circumferential surface of the second outer wall 122 and is matched with the fixing groove 113. The fixing groove 113 is disposed at a first included angle with the horizontal direction, and the fixing portion 123 is disposed along the horizontal direction, so that the extending direction of the fixing portion 123 and the extending direction of the fixing groove 113 form a first included angle θ 1.

Alternatively, the fixing portion 123 is horizontally disposed along the circumferential surface of the first inner wall 111, one end of the fixing portion 123 facing the first opening 1131 is horizontally disposed, and the fixing portion 123 extends along the circumferential surface of the second outer wall 122 at a second included angle θ 1 with the horizontal direction and is matched with the fixing groove 113. The fixing groove 113 is disposed at a first included angle with the horizontal direction, and the fixing portion 123 is disposed along the horizontal direction, so that the extending direction of the fixing portion 123 and the extending direction of the fixing groove 113 form a first included angle θ 1.

In some embodiments, the fixing portion 123 is a rigid material, or a deformable material. Deformable materials include plastically deformable materials or pressure deformable materials, such as polyethylene, rubber, etc. It can be understood that the extending direction of the fixing portion 123 and the extending direction of the fixing groove 113 form a first angle, so that when the fixing portion 123 is made of a rigid material, a lateral extrusion force from the inner wall of the fixing groove 113 generated by the first angle is applied to the fixing portion 123, the friction between the fixing portion 123 and the fixing groove 113 is increased, so that the fixing portion 123 is abutted against the inner wall of the fixing groove 113 under the action of the lateral extrusion force to limit the relative movement between the acetabular liner 12 and the acetabular outer cup 11 in any direction, and the acetabular liner 12 is locked and fixed in the acetabular outer cup 11; however, since the rigid material deforms to a lesser degree under the action of the lateral pressure, after the fixing portion 123 enters the fixing groove 113, the resistance to rotation of the acetabular liner 12 becomes greater, so that the assembly of the acetabular component 100 becomes more difficult. When the fixing portion 123 is made of a deformable material, under the action of a rotational force, the fixing portion 123 of the acetabular liner 12 is rotated into the fixing groove 113, the fixing portion 123 is deformed by being pressed by the inner wall of the fixing groove 113, and the fixing portion 123 receives a lateral extrusion force from the inner wall of the fixing groove 113 generated by the first included angle, so that the fixing portion 123 abuts against the inner wall of the fixing groove 113, and further, the relative movement of the acetabular liner 12 and the acetabular outer cup 11 in any direction is limited, and the acetabular liner 12 is locked and fixed in the acetabular outer cup 11.

Optionally, the first included angle θ 1 is an acute angle, such as between 1 ° and 30 °, such as between 1 ° and 10 °, and such as between 3 ° and 5 °. When the first included angle is greater than 30 °, the lateral pressing force of the fixing portion 123 from the inner wall of the fixing groove 113 due to the first included angle will largely prevent the fixing portion 123 from being screwed into the fixing groove 113, so that the acetabular liner 12 is difficult to be screwed to the predetermined installation position, and the difficulty of installing the acetabular component 100 increases. It is understood that the first included angle may be formed by the fixing portion 123 or the fixing groove 113 extending upward in the horizontal direction, or may be formed by the fixing portion extending downward in the horizontal direction, and is not particularly limited herein.

Referring to fig. 7 and 8, in another embodiment, the fixing portion 123 includes a guide portion 1231 and a locking portion 1232, the guide portion 1231 is disposed at a side of the fixing portion 123 facing the first opening 1131 of the fixing groove 113 and extends in a horizontal direction at a circumferential surface of the second outer wall 122, the locking portion 1232 is connected to the guide portion and is disposed at a side of the fixing portion 123 far from the first opening 1131 of the fixing groove 113, and the locking portion 1232 extends at a second angle θ 2 from the horizontal direction at a circumferential surface of the second outer wall 122 toward a side far from the first opening 1131. The fixing groove 113 is horizontally provided along the circumferential surface of the first inner wall 111. In this way, since the guide portion is provided on the fixing portion 123 on the side facing the first opening 1131 of the fixing groove 113 and extends in the horizontal direction on the circumferential surface of the second outer wall 122, the guide portion 1231 of the fixing portion 123 can be easily screwed into the fixing groove 113 when a rotational force is applied to the acetabular liner 12. When the rotation force is continuously applied to the acetabular liner 12, the rotation angle of the acetabular liner 12 is increased until the locking portion 1232 begins to enter the fixing groove 113, and the locking portion 1232 forms a second included angle θ 2 with the fixing portion 123, lateral extrusion force is applied to the locking portion 1232 by the inner wall of the fixing groove 113, so that the friction force between the fixing portion 123 and the fixing groove 113 is increased until clamping and locking are performed, and then the relative movement of the acetabular liner 12 and the acetabular outer cup 11 in any direction is limited, and the locking and fixing of the acetabular liner 12 relative to the acetabular outer cup 11 are realized.

In some embodiments, when the fixing portion 123 is a deformable material, the deformable material includes a plastically deformable material or a pressure deformable material, such as polyethylene, rubber, and the like. Under the action of the rotation force, the fixing portion 123 of the acetabular liner 12 is rotated into the fixing groove 113, the fixing portion 123 is deformed by the extrusion of the inner wall of the fixing groove 113, the fixing portion 123 receives the lateral extrusion force from the inner wall of the fixing groove 113 generated by the first included angle, the fixing portion 123 abuts against the inner wall of the fixing groove 113, and the fixing portion 123 is plastically deformed, so that the acetabular liner 12 is locked and fixed with the acetabular cup 11.

Optionally, the second included angle θ 2 is an acute angle, such as between 1 ° and 30 °, such as between 1 ° and 10 °, and such as between 3 ° and 5 °. When the second included angle is greater than 30 °, the lateral pressing force of the fixing portion 123 from the inner wall of the fixing groove 113 generated by the first included angle will largely prevent the fixing portion 123 from being screwed into the fixing groove 113, so that the difficulty of screwing the acetabular liner 12 to the predetermined installation position is increased.

In the present embodiment, limiting the relative movement of the acetabular liner 12 and the acetabular cup 11 in any direction includes at least limiting linear movement and circumferential rotation of the acetabular liner 12 relative to the acetabular cup 11 in the axial direction.

Referring to fig. 9 and 10, in another embodiment, the inner wall of the fixing groove 113 is provided with a first retaining portion 1133, and the outer surface of the fixing portion 123 is provided with a second retaining portion 1233 adapted to the first retaining portion 1133, so that the first retaining portion 1133 and the second retaining portion 1233 are fixed in a matching manner, so as to limit the linear motion of the acetabular liner 12 relative to the acetabular outer cup 11 in the axial direction and the rotation in the circumferential direction, and thus, the locking and fixing of the acetabular liner 12 relative to the acetabular outer cup 11 are achieved.

In some embodiments, the locking portion 1232 of the fixing part 123 is provided at the outer surface thereof with the second coming-off preventing portion 1233, and the guide portion 1231 of the fixing part 123 is not provided at the outer surface thereof with the second coming-off preventing portion 1233. For example, the outer surface of the guide portion 1231 of the fixing part 123 is smooth so that the fixing part 123 can be easily screwed into the fixing groove 113.

The first anti-slip parts 1133 may be saw-tooth-shaped protrusions, dot-shaped protrusions, or strip-shaped protrusions distributed at intervals, and the second anti-slip parts 1233 may be grooves matching the positions and shapes of the first anti-slip parts 1133; or the second retaining portions 1233 may be saw-tooth-shaped protrusions, dot-shaped protrusions, or strip-shaped protrusions distributed at intervals, and the first retaining portions 1133 may be grooves with matching positions and shapes of the second retaining portions 1233. When the acetabular liner 12 is screwed to a predetermined position, the fixing portion 123 abuts against the fixing groove 113, and the first retaining portion 1133 and the second retaining portion 1233 cooperate to limit linear movement and circumferential rotation of the acetabular liner 12 relative to the acetabular outer cup 11 in the axial direction, so as to lock and fix the acetabular liner 12 relative to the acetabular outer cup 11.

As shown in fig. 11 and 12, the number of the fixing grooves 113 may be plural, and the plurality of fixing grooves 113 are uniformly provided on the first inner wall 111 along the circumferential direction of the first inner wall 111. It is understood that an avoiding groove 114 is formed at one side of the first opening 1131 of each fixing groove 113. The number of the fixing portions 123 may be plural, and the plurality of fixing grooves 113 are uniformly formed on the second outer wall 122 along the circumferential direction of the second outer wall 122. The number of the fixing grooves 113 and the number of the escape grooves 114 may be larger than the number of the fixing portions 123, or the number of the fixing grooves 113 and the escape grooves 114 may be equal to the number of the fixing portions 123. When the number of the fixed grooves 113 and the escape grooves 114 is larger than the number of the fixed portions 123, the number is an integral multiple of the number of the fixed portions 123. The number of the fixing parts 123 is more than three, so that the stability of locking the acetabular liner 12 and the acetabular cup 11 can be better realized.

For example, the fixing grooves 113 include a first fixing groove, a second fixing groove, and a third fixing groove adjacent to each other, and the fixing portions 123 include a first fixing portion, a second fixing portion, and a third fixing portion. First fixed slot, second fixed slot and third fixed slot interval set up, and the interval between first fixed slot, second fixed slot and the third fixed slot is provided with respectively that the groove is dodged to the first groove of dodging, the second dodges the groove and the third dodges the groove, and the groove is dodged respectively with first fixed slot, second fixed slot and the adjacent setting of third fixed slot to the first groove of dodging, second dodge groove and third dodge the groove. When the acetabular component 100 is assembled, the first fixing portion, the second fixing portion and the third fixing portion are aligned with the first avoidance groove, the second avoidance groove and the third avoidance groove, so that the acetabular liner 12 moves toward the acetabular cup 11 along the axis of the acetabular cup 11, and the acetabular liner 12 can be completely placed in the first accommodation space 110. The acetabular liner 12 of the acetabular liner 12 can be in a pre-installed state in which it is placed into the first receiving space 110 of the acetabular cup 11, in which case the acetabular liner 12 is only placed into the first receiving space 110 from the opening of the acetabular cup 11 and is not yet locked. In the pre-installed state, each fixing portion 123 of the acetabular liner 12 corresponds to each avoidance groove 114 of the acetabular cup 11 in the axial direction of the acetabular cup 11, so that each fixing portion 123 of the acetabular liner 12 is not obstructed by any part of the acetabular cup 11, and the acetabular liner 12 can be completely inserted into the first receiving space 110. Each fixing portion 123 of the acetabular liner 12 is opposite to the first opening 1131 of each fixing groove 113 of the acetabular cup 11 in the circumferential direction of the acetabular cup 11, so that each fixing portion 123 of the acetabular liner 12 can be rotationally engaged into each fixing groove 113 under the action of a rotational force. At this time, a rotational force is applied to the acetabular liner 12 in the circumferential direction of the acetabular cup 11 toward the fixing grooves 113, so that the acetabular liner 12 rotates relative to the acetabular cup 11 in the first direction, and each fixing portion 123 of the acetabular cup 11 is screwed into each fixing groove 113 of the acetabular cup 11.

Illustratively, as shown in fig. 12, when a plurality of fixing portions 123 are provided, the ends of two adjacent fixing portions 123 facing the first opening 1131 of the fixing groove 113 are separated by a predetermined angle α, which is defined by an included angle between a line connecting the ends of each two adjacent fixing portions 123 facing the first opening 1131 of the fixing groove 113 and the axis of the acetabular liner 12. The predetermined angle is between 10 ° and 150 °, such as 30 ° to 120 °, or 30 ° to 90 °. Each two adjacent fixing parts 123 are equally spaced by a predetermined angle toward one end of the first opening 1131 of the fixing groove 113, so that the fixing parts 123 are uniformly distributed in the circumferential direction of the second outer wall 122.

As an example, the number of the fixing portions 123 may be three, four, six, eight, or the like. It is understood that the number of the fixing portions 123, the number of the fixing grooves 113, and the number of the avoiding grooves 114 are not limited in the present embodiment, as long as the acetabular liner 12 can be completely placed into the first receiving space 110 of the acetabular shell 11 in the pre-installation state of the acetabular component 100, and the acetabular liner 12 and the acetabular shell 11 can be stably locked in the installation state.

As shown in fig. 11, the acetabular cup 11 has a first end surface 115 defined by the first outer wall 112 and the first inner wall 111, and the acetabular liner 12 has a second end surface 125 defined by the second outer wall 122 and the second inner wall 121, wherein the first end surface 115 has a first alignment marker 1151 disposed thereon, the second end surface 125 has a second alignment marker 1251 disposed thereon, and the relative positions of the first alignment marker 1151 and the second alignment marker 1251 indicate whether the acetabular cup 11 and the acetabular liner 12 are locked together.

In some embodiments, first positioning indicia 1151 is disposed on first end surface 115 at a location corresponding to retaining groove 113, second positioning indicia 1251 is disposed on second end surface 125, and second positioning indicia 1251 is disposed at a location corresponding to first positioning indicia 1151 when acetabular liner 12 is locked in position relative to acetabular cup 11 such that the relative positions of first positioning indicia 1151 and second positioning indicia 1251 indicate whether acetabular cup 11 and acetabular liner 12 have been locked in place when rotational force is applied to acetabular liner 12 to rotate acetabular liner 12 relative to acetabular cup 11.

Optionally, the first end surface 115 of the acetabular cup 11 is further provided with a third positioning mark 1152, the third positioning mark 1152 is provided at a position corresponding to the second positioning mark 1251 relative to the first end surface 115 when the acetabular liner 12 and the acetabular cup 11 are in the pre-installation state, and a relative position of the second positioning mark 1251 and the third positioning mark 1152 indicates whether the acetabular liner 12 and the acetabular liner 11 are in the pre-installation state.

As an example, the first positioning mark 1151, the second positioning mark 1251, and the third positioning mark 1152 may be score lines.

Referring to fig. 1, in some embodiments, the first end face 115 of the acetabular liner 12 is provided with a mounting hole 130. The number of the mounting holes 130 may be plural, such as three, four, five, etc., and is not particularly limited as long as it is adapted to the instruments required for assembling the acetabular component 100.

It is noted that in fig. 6, 8 and 12, the lines on either side of the angle are merely representative of the direction and extent of the angle and do not represent any component or structure in the acetabular component.

The embodiment of the application also provides a hip joint prosthesis. Referring to fig. 2, fig. 2 is a schematic structural diagram of a hip prosthesis according to an embodiment of the present application. The hip prosthesis may include an acetabular component 100 and a femoral head prosthesis. The acetabular assembly 100 is for fixation to a pelvic bone of a patient to replace a resected acetabulum of the patient. Femoral head prostheses are used to secure to a patient's femur to replace the patient's resected femoral head.

As shown in fig. 2, the femoral head prosthesis may include a ball head, which may be shaped to mimic the shape of the femoral head. The ball head may be directly connected to the femur by fasteners such as screws or the like.

Optionally, the femoral head prosthesis may further comprise a femoral stem. One end of the femoral stem is fixedly connected with the ball head, and the other end of the femoral stem is fixedly connected with the femur of a patient.

The embodiment of the present application further provides an assembling method based on the above acetabular component 100, including: placing the acetabular liner 12 fully into the first receiving space 110 such that the acetabular component 100 is in a pre-installed state; a rotational force is applied to the acetabular liner 12 in the circumferential direction to rotate the acetabular liner 12 relative to the acetabular cup 11, so that the fixing portion 123 is engaged with the fixing groove 113.

In some embodiments, the method of assembly comprises:

s11, obtaining an acetabulum outer cup and an acetabulum inner liner,

the acetabulum outer cup is the acetabulum outer cup, and the acetabulum inner liner is the acetabulum inner liner;

s21, aligning an avoidance groove of the acetabular outer cup with a fixing part of the acetabular liner, and aligning one end, close to a first opening of the fixing groove, of the fixing part with the first opening, so that the acetabular liner can be completely placed into a first accommodating space, and the acetabular component is in a pre-installation state;

s31, applying a rotating force to the acetabulum lining along the circumferential direction to enable the acetabulum lining to rotate relative to the acetabulum outer cup in the direction away from the first opening of the fixing groove, so that the acetabulum lining and the acetabulum outer cup are in a locking state.

The acetabular component may be assembled outside of the patient's body, such as by a manufacturer during production testing, or by pre-assembling the acetabular component for ease of transport and turnaround. Or the acetabular component may be assembled in the patient during a hip arthroplasty. It is understood that the present embodiments provide methods of assembly in which a medical instrument adapted to the acetabular component may be used, for example, an instrument adapted to the receiving hole of the acetabular liner may be used to apply a rotational force to the acetabular liner in a circumferential direction.

While the present disclosure has been described in detail with reference to the above embodiments, the principles and embodiments of the present disclosure are explained in detail with reference to specific embodiments, which are merely intended to facilitate an understanding of the present disclosure and its core concepts; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An acetabular component, comprising: an acetabulum outer cup and an acetabulum inner lining,

the acetabulum outer cup comprises a first inner wall and a first outer wall, wherein the first inner wall surrounds to form a first accommodating space; a first inner wall of the acetabulum outer cup is provided with a fixing groove, and the fixing groove extends along the circumferential direction of the first inner wall;

the acetabulum inner liner comprises a second inner wall and a second outer wall, the acetabulum inner liner can be contained in the first containing space, the second outer wall is provided with a fixing part, the fixing part extends along the circumferential direction of the second outer wall, the fixing part can be adapted to the fixing groove, and at least one part of the fixing part can be clamped in the fixing groove; the fixing part is made of deformable materials;

wherein the acetabular component has a pre-installed state in which the acetabular liner is received in the first receiving space and the acetabular liner is relatively movable with respect to the acetabular outer cup, in which pre-installed state the acetabular liner is fully received in the first receiving space;

the fixing part comprises a guide part and a locking part, the guide part is arranged on one side, facing the first opening, of the fixing part, the guide part extends along the horizontal direction, the locking part is connected with the guide part and arranged on one side, far away from the first opening, of the fixing part, and the locking part extends towards one side, far away from the first opening, of the fixing part, and forms a second included angle with the horizontal direction; the locking part is provided with two oppositely arranged side surfaces along the axial direction of the acetabulum lining, and the extending directions of the two side surfaces are the same.

2. The acetabular assembly of claim 1, wherein the acetabular cup has a first end surface defined by the first outer wall and the first inner wall, the first inner wall being provided with an avoidance groove having a side wall formed by a portion of a surface of the first inner wall that is recessed in a direction of the first outer wall and extends to the first end surface, the avoidance groove being capable of receiving the fixation portion.

3. The acetabular assembly of claim 2, wherein the avoidance slot is disposed adjacent the fixation slot, the avoidance slot having a bottom surface connecting the sidewall and the first inner wall, the bottom surface being connected to the bottom surface of the fixation slot, the first opening of the fixation slot facing the avoidance slot.

4. The acetabular assembly of claim 3, wherein the fixation groove is circumferentially disposed along the first inner wall and extends in a horizontal direction; the fixing portion is arranged along the circumferential direction of the second outer wall and extends in the horizontal direction.

5. The acetabular assembly of claim 3, wherein the retaining groove is circumferentially disposed along the first inner wall and extends at a first angle relative to horizontal.

6. The acetabular assembly of claim 5, wherein the first included angle is between 1 ° and 30 °; or the second included angle is 1-30 degrees.

7. The acetabular assembly of claim 6, wherein the first included angle is 3-5 °; or the second included angle is 3-5 degrees.

8. The acetabular component according to claim 1, wherein the inner wall of the fixing groove is provided with a first retaining portion, and the outer surface of the fixing portion is provided with a second retaining portion adapted to the first retaining portion.

9. The acetabular component of claim 1, wherein the number of the fixing grooves is multiple, the fixing grooves are evenly distributed along the circumferential direction of the first inner wall, and one avoidance groove is arranged on one side of the first opening of each fixing groove; and/or the quantity of fixed part is a plurality of, and is a plurality of the fixed slot is followed the circumference evenly distributed of second outer wall.

10. The acetabular assembly of claim 9, wherein the second outer wall has a plurality of the fixation portions, and any two adjacent fixation portions are separated by a predetermined angle toward an end of the first opening, the predetermined angle being defined by an included angle between lines connecting ends of each two adjacent fixation portions toward the end of the first opening to an axis of the acetabular liner, the predetermined angle being between 10 ° and 150 °.

11. The acetabular assembly of claim 1, wherein the acetabular cup has the first end surface defined by the first outer wall and the first inner wall, and the acetabular liner has the second end surface defined by the second outer wall and the second inner wall, wherein the first end surface has a first positioning mark disposed thereon and the second end surface has a second positioning mark disposed thereon, and wherein the relative positions of the first positioning mark and the second positioning mark indicate whether the acetabular cup and the acetabular liner are in a locked condition.

12. The acetabular assembly of claim 1, wherein the acetabular outer cup has the first end surface defined by the first outer wall and the first inner wall, and the acetabular liner has a second end surface defined by the second outer wall and the second inner wall, the first end surface having one or more mounting holes disposed thereon.

13. A hip prosthesis, comprising:

the acetabular component of any one of claims 1-12; and

14. A method of assembling the acetabular component according to any one of claims 1-12, comprising: placing the acetabular liner completely into the first receiving space to place the acetabular component in a pre-installed state; and applying a rotating force to the acetabulum inner liner along the circumferential direction to enable the acetabulum inner liner to rotate relative to the acetabulum outer cup, so that the fixing part is clamped in the fixing groove.

15. The method of assembling the acetabular component of claim 14, wherein the fully placing the acetabular liner into the first receiving space to place the acetabular component in a pre-installed state comprises: aligning an avoidance slot of the acetabular outer cup with a fixation portion of the acetabular liner to enable the acetabular liner to be fully placed into the first receiving space to place the acetabular component in the pre-installation state.