CN113796997B

CN113796997B - Acetabular cup prosthesis

Info

Publication number: CN113796997B
Application number: CN202111373113.2A
Authority: CN
Inventors: 刘敏
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-04-19
Anticipated expiration: 2041-11-19
Also published as: CN113796997A

Abstract

The invention provides an acetabular cup prosthesis comprising: an inner cup body having an opening; the adjusting outer cup is sleeved outside the inner cup body; the adjusting columns are arranged along the circumferential direction of the acetabular cup prosthesis and movably penetrate through the inner cup body and the adjusting outer cup to enable the adjusting outer cup to move between an initial retraction position and an expansion position. The technical scheme of the application can effectively solve the problem that the contact area between the acetabulum outer cup prosthesis and the acetabulum socket in the related technology is not adjustable, so that the joint degree between the acetabulum socket and the acetabulum outer cup prosthesis of part of patients is poor.

Description

Acetabular cup prosthesis

Technical Field

The invention relates to the field of joint prostheses, in particular to an acetabular cup prosthesis.

Background

The total hip replacement is a mature operation at present, can effectively help patients with hip joint diseases, and improves the lives of the patients. The total hip joint replacement prosthesis comprises an acetabulum side prosthesis and a femur side prosthesis, and the common acetabulum side prosthesis comprises an acetabulum outer cup, a lining and a ball head.

The prior acetabulum outer cup prosthesis generally adopts an integrated metal prosthesis, the outer surface of the acetabulum outer cup is contacted with an acetabulum socket of a patient through bone cement or biological coating, and the inner surface is matched with an acetabulum inner lining. The outer acetabular cup is generally hemispherical or ellipsoidal with the diameter of the acetabular cup opening larger than the height, and is in contact with the acetabular fossa, so that the contact area cannot be adjusted. For patients with shallow acetabular sockets or malformed acetabular sockets, the acetabular cup prosthesis does not fit the acetabular socket well.

Disclosure of Invention

The invention mainly aims to provide an acetabular cup prosthesis, which aims to solve the problem that the contact area between the acetabular cup prosthesis and an acetabular socket of a part of patients is not adjustable, so that the fitting degree between the acetabular socket and the acetabular cup prosthesis of the part of patients is poor.

In order to achieve the above object, the present invention provides an acetabular cup prosthesis comprising: an inner cup body having an opening; the adjusting outer cup is sleeved outside the inner cup body; the adjusting columns are arranged along the circumferential direction of the acetabular cup prosthesis and movably penetrate through the inner cup body and the adjusting outer cup to enable the adjusting outer cup to move between an initial retraction position and an expansion position.

Furthermore, the adjusting column and the adjusting outer cup matched end are provided with an adjusting ring, the adjusting outer cup is provided with a first opening end corresponding to the mouth part, and the first opening end is provided with an arc-shaped mounting groove matched with the adjusting ring.

Further, be provided with a plurality of regulation holes of wearing to establish a plurality of regulation posts on the interior cup, be provided with a plurality of bosss along interior cup circumference distribution on the outer wall of interior cup, a plurality of bosss set up with a plurality of regulation hole one-to-ones, and first opening end department is provided with a plurality of first recesses that hold a plurality of bosss, and the arc mounting groove is located the first bottom that holds the recess.

Furthermore, the adjusting column further comprises a thread section, the adjusting ring is arranged at one end of the thread section, and an internal thread matched with the thread section is arranged in the adjusting hole.

Furthermore, the outer wall of the adjusting ring is a conical surface, and the cross-sectional area of the conical surface is gradually reduced in the direction from the thread section to the adjusting ring.

Further, interior cup includes first cup and sets up the second cup in first cup, and first cup has the second open end that corresponds to the oral area, is provided with heavy platform on the inside wall of second open end, adjusts the within range that the post is located heavy platform.

Furthermore, one end, far away from the adjusting ring, of the adjusting column is provided with a cap body section, the outer diameter of the cap body section is larger than that of the thread section, a second accommodating concave portion for accommodating the cap body section is arranged on the inner side wall of the second opening end, the second accommodating concave portion is communicated with the adjusting hole and is located at one end, far away from the adjusting hole, of the adjusting hole, and the diameter of the circumference where the second accommodating concave portion is located is larger than the inner diameter of the adjusting hole.

Further, the outer side of the second cup body is provided with a rotation prevention protruding portion which is arranged in the second accommodating concave portion.

Furthermore, a first groove is formed in the inner wall of the first cup body, a second groove corresponding to the first groove is formed in the outer wall of the second cup body, and the acetabular cup prosthesis further comprises a first clamping piece arranged in the first groove and the second groove.

Further, interior cup includes first cup and sets up the second cup in first cup, and acetabular cup false body is still including connecting the second cup and being located the second joint spare of the inside lining of acetabular cup false body, and second joint spare includes the main part and connects the connecting portion between the main part both ends, and second cup inboard is provided with the third recess that holds the main part and communicates and supply the socket that connecting portion worn out with the third recess.

Further, the connecting portion comprises a first connecting piece connected with the first end of the main body portion and a second connecting piece connected with the second end of the main body portion, the first connecting piece and the second connecting piece are arranged in an overlapping mode, one of the first connecting piece and the second connecting piece is provided with a connecting sliding groove, and the other one of the first connecting piece and the second connecting piece is provided with a connecting column.

Further, interior cup includes cup body, and cup body has the third open end that corresponds to the oral area, and interior cup still is provided with between cup body and the backstop boss and holds the recess including setting up in the backstop boss of third open end department, and first open end sets up in holding the recess.

Furthermore, a plurality of hollow parts extending along the height direction of the adjusting outer cup are arranged on the adjusting outer cup.

By applying the technical scheme of the invention, the acetabulum cup prosthesis comprises an inner cup body and an adjusting outer cup arranged on the outer side of the inner cup body. The inner cup body can be matched with a corresponding acetabulum inner lining prosthesis, and the adjusting outer cup can be matched with an acetabulum socket of a patient. The acetabular cup prosthesis further comprises a plurality of adjusting columns movably arranged between the inner cup body and the adjusting outer cup in a penetrating mode, and the adjusting columns can be adjusted in a penetrating mode, so that the adjusting outer cup can be squeezed to enable the adjusting outer cup to expand outwards or reduce extrusion force for adjusting the outer cup to enable the adjusting outer cup to retract inwards. Simultaneously, the quantity of adjusting the post is a plurality of to a plurality of regulation posts set up along acetabular cup prosthesis's circumference, make like this adjust each position homoenergetic on outer cup circumference and adjust, realize meticulous regulation. Therefore, in the process of implanting the prosthesis into the acetabulum of the patient, the penetration depth of each adjusting column can be adjusted according to the form of the acetabulum of the patient, and the expansion degree of the outer cup is further finely adjusted, so that the outer surface of the adjusting outer cup can be better attached to the acetabulum of the patient. Therefore, the technical scheme of the application can effectively solve the problem that the contact area between the acetabulum outer cup prosthesis and the acetabulum socket in the related technology is not adjustable, so that the joint degree between the acetabulum socket and the acetabulum outer cup prosthesis of part of patients is poor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows an exploded schematic view of an embodiment of an acetabular cup prosthesis according to the invention;

FIG. 2 shows a schematic cross-sectional view of a portion of the structure of the acetabular cup prosthesis of FIG. 1;

FIG. 3 illustrates a perspective view of a first cup of the acetabular cup prosthesis of FIG. 1;

FIG. 4 shows a schematic cross-sectional view of the first cup of FIG. 3;

fig. 5 shows an enlarged view of the first cup of fig. 4 at a;

FIG. 6 illustrates a perspective view of a second cup of the acetabular cup prosthesis of FIG. 1;

FIG. 7 illustrates a perspective view of an adjustment outer cup of the acetabular cup prosthesis of FIG. 1;

FIG. 8 shows an enlarged view of the adjustment cup of FIG. 7 at B;

FIG. 9 illustrates a perspective view of an adjustment column of the acetabular cup prosthesis of FIG. 1;

FIG. 10 is a perspective view of a first embodiment of a second snap member of the acetabular cup prosthesis of FIG. 1;

fig. 11 shows an enlarged view of the second clip of fig. 10 at C;

FIG. 12 illustrates a perspective view of a second embodiment of a second snap member of the acetabular cup prosthesis of FIG. 1; and

fig. 13 shows an enlarged view of the second clip of fig. 12 at D.

Wherein the figures include the following reference numerals:

10. an inner cup body; 11. a first cup body; 111. an adjustment hole; 112. a boss; 113. sinking a platform; 114. a second accommodation recess; 115. a first groove; 116. a second square groove; 117. an operation section; 12. a second cup body; 121. an anti-rotation protrusion; 122. a second groove; 123. a third groove; 124. a socket; 125. a first square groove; 13. a cup body main body; 14. a stop boss; 15. an accommodating recess; 20. adjusting the outer cup; 21. an arc-shaped mounting groove; 22. a first accommodation recess; 23. a hollow-out section; 30. an adjustment column; 31. an adjusting ring; 32. a threaded segment; 33. a cap body segment; 40. a first clip member; 50. a second clip member; 51. a main body portion; 52. a connecting portion; 521. a first connecting piece; 522. a second connecting sheet; 523. connecting the sliding chute; 524. connecting columns.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1, the acetabular cup prosthesis of the present embodiment includes: inner cup 10, adjustment outer cup 20, and a plurality of adjustment posts 30. Wherein, the inner cup body 10 is provided with a mouth part; the adjusting outer cup 20 is sleeved on the outer side of the inner cup body 10; a plurality of adjustment columns 30 are arranged along the circumference of the acetabular cup prosthesis, and the plurality of adjustment columns 30 are movably arranged between the inner cup body 10 and the adjustment outer cup 20 so as to enable the adjustment outer cup 20 to move between an initial retracted position and an expanded position.

With the technical solution of the present embodiment, the acetabular cup prosthesis comprises an inner cup body 10 and an adjusting outer cup 20 arranged outside the inner cup body 10. Inner cup 10 can be mated to a corresponding acetabular liner prosthesis and adjustment outer cup 20 can be mated to a patient's acetabular socket. The acetabular cup prosthesis further comprises a plurality of adjusting columns 30 movably arranged between the inner cup body 10 and the adjusting outer cup 20 in a penetrating mode, and the adjusting outer cup 20 can be squeezed to enable the adjusting outer cup 20 to expand outwards or reduce squeezing force on the adjusting outer cup 20 to enable the adjusting outer cup 20 to retract inwards by adjusting the penetrating depth of the adjusting columns 30. Meanwhile, the number of the adjusting columns 30 is multiple, and the adjusting columns 30 are arranged along the circumferential direction of the acetabular cup prosthesis, so that all positions on the circumferential direction of the adjusting outer cup 20 can be adjusted, and fine adjustment is realized. Thus, in the process of implanting the prosthesis into the patient's acetabulum socket, the penetration depth of each adjustment column 30 can be adjusted according to the form of the patient's acetabulum socket, and the expansion degree of the adjustment outer cup 20 can be further finely adjusted, so that the outer surface of the adjustment outer cup 20 can be better attached to the patient's acetabulum socket. Therefore, the technical scheme of the embodiment can effectively solve the problem that the contact area between the acetabular cup prosthesis and the acetabular socket of a part of patients is not adjustable, so that the fitting degree between the acetabular socket and the acetabular cup prosthesis of the part of patients is poor.

In this embodiment, the materials of the components may be titanium alloy, the inner cup body 10 and the adjusting column 30 may also be made of medical stainless steel or cobalt-chromium-molybdenum alloy, and the adjusting outer cup 20 is made of a material with a low elastic modulus, such as titanium alloy, so as to be easily deformed.

In this embodiment, the outer surface of the adjustable outer cup 20 is provided with a high porosity coating suitable for bone ingrowth, i.e. after the acetabular outer cup prosthesis is better fitted to the acetabular fossa of a patient, rapid bone ingrowth can be realized, so that the acetabular cup prosthesis and bone are integrated, and the stability of the postoperative prosthesis is improved. Specifically, the coating material can be a plasma spraying coating of pure titanium, hydroxyapatite, a pure titanium and hydroxyapatite material, and can also be a trabecular bone structure printed by 3D, and the specific material is titanium alloy or tantalum. The coating is arranged on the basis of realizing the initial stability of the acetabulum fossa of the patient, is beneficial to the growth of later-stage sclerotin, and realizes the long-term stability of the acetabulum quilt prosthesis. The outer surface of the inner cup body 10 can also be a coating or a grid structure, and the acetabular cup prosthesis can be more stable after bone grows on the inner cup body 10.

As shown in fig. 2 and fig. 7 to 9, in the present embodiment, an adjusting ring 31 is disposed at one end of the adjusting column 30 engaged with the adjusting outer cup 20, the adjusting outer cup 20 has a first open end corresponding to the mouth, and the first open end is disposed with an arc-shaped mounting groove 21 engaged with the adjusting ring 31. The adjusting ring 31 is inserted in the arc-shaped mounting groove 21, and along with the continuous screwing of the adjusting column 30, the adjusting ring 31 drives the first opening end of the adjusting outer cup 20 to move towards the direction of the opening part far away from the inner cup body 10, and the adjusting outer cup 20 is extruded to expand outwards towards the acetabulum nest of the patient, so that the adjusting outer cup can be better attached to the acetabulum nest of the patient.

Note that the above-mentioned "corresponding to the first opening end of the mouth portion" is not limited to the end surface position, but refers to a position in the vicinity of the first opening end.

As shown in fig. 1, 3, 7 and 8, in the present embodiment, the inner cup 10 is provided with a plurality of adjusting holes 111 penetrating through the plurality of adjusting posts 30, the outer wall of the inner cup 10 is provided with a plurality of bosses 112 distributed along the circumferential direction of the inner cup 10, the plurality of bosses 112 and the plurality of adjusting holes 111 are arranged in a one-to-one correspondence manner, the first opening end is provided with a plurality of first accommodating recesses 22 accommodating the plurality of bosses 112, and the arc-shaped mounting groove 21 is located at the bottom of the first accommodating recess 22. So make regulation hole 111, boss 112 and the first recess 22 that holds one-to-one setting, through the cooperation between boss 112 and the first recess 22 that holds, easily realize the counterpoint between the inner cup body 10 and the regulation outer cup 20 and the counterpoint of adjusting ring 31 and arc mounting groove 21 in the prosthesis installation for the installation operation of prosthesis is more convenient. Meanwhile, the matching between the boss 112 and the first accommodation concave part 22 has good anti-rotation effect, and the stability of the acetabular cup prosthesis is enhanced.

In the present embodiment, the plurality of adjustment columns 30 are uniformly arranged along the circumference of the acetabular cup prosthesis, and correspondingly, the plurality of bosses 112, the plurality of adjustment holes 111 and the plurality of first receiving recesses 22 are also uniformly arranged along the circumference of the acetabular cup prosthesis and are equal in number to the adjustment columns 30. Specifically, the number of the adjustment posts 30, the bosses 112, the adjustment holes 111, and the first accommodation recess 22 may be 6, 12, or other numbers. The adjusting columns 30 are uniformly arranged along the circumferential direction of the acetabular cup prosthesis, and the outer cup 20 can be adjusted by 360 degrees in the circumferential direction.

As shown in fig. 1, 2, 3 and 9, in the present embodiment, the adjustment post 30 further includes a threaded section 32, the adjustment ring 31 is disposed at one end of the threaded section 32, and an internal thread matching the threaded section 32 is disposed in the adjustment hole 111. Through the matching between the internal thread in the adjusting hole 111 and the thread section 32, the stepless adjustment between the adjusting column 30 and the inner cup body 10 can be realized, so that the adjustment of the outer cup 20 is more flexible. Meanwhile, the threaded structure has the advantages of reliable connection and easiness in processing.

As shown in fig. 1, 2, 8 and 9, the outer wall of the adjusting ring 31 is a tapered surface, and the cross-sectional area of the tapered surface gradually decreases in the direction from the threaded section 32 to the adjusting ring 31. That is, the cross section of the end of the adjusting ring 31 far away from the threaded section 32 is relatively small, so that the alignment between the adjusting ring 31 and the arc-shaped mounting groove 21 is easy to realize, meanwhile, due to the locking effect between the taper fitting, along with the continuous deepening of the adjusting column 30, the adjusting column 30 and the adjusting outer cup 20 cannot be separated, the matching between the adjusting ring 31 and the arc-shaped mounting groove 21 can be more fastened, and the reliability and the stability after the acetabular cup prosthesis is implanted are ensured.

As shown in fig. 1 to 3, in the present embodiment, the inner cup 10 includes a first cup 11 and a second cup 12 disposed in the first cup 11, the first cup 11 has a second open end corresponding to the mouth, a sinking platform 113 is disposed on an inner sidewall of the second open end, and the adjusting column 30 is located within the range of the sinking platform 113. It should be noted that the fact that the adjusting column 30 is located within the range of the sinking platform 113 means that the adjusting column 30 does not protrude inward from the sinking platform 113. This ensures that adjustment post 30 does not interfere with second cup 12.

As shown in fig. 1, 2, 3 and 9, in the present embodiment, an end of the adjusting cylinder 30 away from the adjusting ring 31 is provided with a cap body segment 33, an outer diameter of the cap body segment 33 is larger than an outer diameter of the threaded section 32, an inner sidewall of the second open end is provided with a second accommodating recess 114 for accommodating the cap body segment 33, the second accommodating recess 114 is communicated with the adjusting hole 111 and is located at an end of the adjusting hole 111 away from the adjusting outer cup 20, and a circumference of the second accommodating recess 114 has a diameter larger than an inner diameter of the adjusting hole 111. The cap body segment 33 is disposed in the second accommodation recess 114, the depressed platform 113 allows the passage of the threaded section 32, but not the cap body segment 33, and the adjustment column 30 can be stopped by the fit between the cap body segment 33 and the depressed platform 113.

As shown in fig. 1, in the present embodiment, the rotation preventing portion 121 is provided on the outer side of the second cup 12, and the rotation preventing portion 121 is provided in the second accommodation recess 114. Through the cooperation between the anti-rotation protrusion 121 and the second receiving recess 114, the second cup 12 can be prevented from rotating relative to the first cup 11, and the reliability and stability of the acetabular cup prosthesis after implantation can be ensured. In the present embodiment, the number of the anti-rotation protrusions 121 is multiple, and the multiple anti-rotation protrusions 121 are uniformly disposed on the outer periphery of the second cup 12, and the number of the anti-rotation protrusions 121 may be specifically 3, 6, 12, or another number.

In this embodiment, as shown in fig. 1, a first groove 115 is formed on the inner wall of the first cup 11, a second groove 122 corresponding to the first groove 115 is formed on the outer wall of the second cup 12, and the acetabular cup prosthesis further includes a first snap 40 disposed in the first groove 115 and the second groove 122. Because the surface of second cup 12 is spherical, through setting up first joint spare 40 between first cup 11 and second cup 12, can avoid second cup 12 to break away from first cup 11 or second cup 12 takes place to rotate for first cup 11, guarantees reliability and stability after acetabular cup prosthesis implantation.

As shown in fig. 1 and fig. 10 to 13, in this embodiment, the inner cup 10 includes a first cup 11 and a second cup 12 disposed in the first cup 11, the acetabular cup prosthesis further includes a second snap-in component 50 connecting the second cup 12 and a liner located in the acetabular cup prosthesis, the second snap-in component 50 includes a main body 51 and a connecting portion 52 connected between two ends of the main body 51, and a third groove 123 disposed inside the second cup 12 and accommodating the main body 51 and a socket 124 disposed inside the second cup and communicating with the third groove 123 and allowing the connecting portion 52 to pass through. The main body part 51 of the second clamping piece 50 is arranged between the second cup body 12 and the inner lining in the acetabular cup prosthesis, so that the acetabular inner lining prosthesis and the acetabular cup prosthesis can be locked, the acetabular inner lining prosthesis is prevented from being separated from the acetabular cup prosthesis, and the reliability and the stability of the acetabular cup prosthesis after being implanted are ensured.

As shown in fig. 10 to 13, the connecting portion 52 includes a first connecting piece 521 connected to the first end of the main body portion 51 and a second connecting piece 522 connected to the second end of the main body portion 51, the first connecting piece 521 and the second connecting piece 522 are disposed in an overlapping manner, one of the first connecting piece 521 and the second connecting piece 522 is provided with a connecting chute 523, and the other is provided with a connecting post 524. In the process of installing the acetabular liner prosthesis to the acetabular cup prosthesis, the connecting column 524 can slide along the connecting chute 523, so that the second clamping piece 50 is prevented from being opened or the second clamping piece 50 is loosened due to other reasons, and the locking failure of the second clamping piece 50 between the acetabular liner prosthesis and the acetabular cup prosthesis and the dislocation between the acetabular liner prosthesis and the acetabular cup prosthesis are avoided, and the reliability and the stability of the acetabular cup prosthesis after being implanted are ensured.

As shown in fig. 1, 3 and 6, in the present embodiment, the height of the insertion opening 124 is equivalent to that of the second clamping member 50, the first square groove 125 is disposed at a position corresponding to the insertion opening 124 on the outer side of the second cup 12, the second square groove 116 is disposed at a position corresponding to the insertion opening 124 on the first cup 11, and the connecting portion 52 can extend out of the insertion opening 124 so that the connecting column 524 and the connecting chute 523 extend into the space formed by the first square groove 125 and the second square groove 116.

Specifically, the installation process of the prosthesis of this embodiment is as follows: first, the second engaging member 50 is pre-installed in the third groove 123, when the acetabular liner prosthesis is placed in the second cup body 12, the connecting column 524 slides in the connecting chute 523, and when the acetabular liner prosthesis and the second cup body are assembled, the second engaging member 50 is simultaneously engaged in the engaging groove on the acetabular liner prosthesis. The second clip 50 is different from clips in the related art in that the second clip 50 in the present embodiment does not cause the second clip 50 to be spread due to various reasons, thereby causing a lock failure. Specifically, the connecting column 524 has a height, and the connecting column 524 is greater than the height of the connecting chute 523. Meanwhile, as the height of the socket 124 is equal to that of the second clamping piece 50, seamless matching between the socket 124 and the second clamping piece 50 can be realized, the connecting column 524 is not easy to deviate from the connecting chute 523, and in addition, the connecting chute 523 limits the connecting column 524, the second clamping piece 50 cannot be spread due to multiple protection, and the locking mechanism of the second clamping piece 50 cannot fail. Specifically, fig. 10 and 11 show a structural view of one embodiment of the second clip 50, and fig. 12 and 13 show a structural view of another embodiment of the second clip 50.

As shown in fig. 1 to 5, in the present embodiment, the inner cup body 10 includes a cup body 13, the cup body 13 has a third opening end corresponding to the mouth, the inner cup body 10 further includes a stopping boss 14 disposed at the third opening end, an accommodating groove 15 is disposed between the cup body 13 and the stopping boss 14, and the first opening end is disposed in the accommodating groove 15. The first opening end is arranged in the accommodating groove 15 and can limit the adjusting outer cup 20, so that the first opening end is always positioned in the accommodating groove 15 in the expansion process of the adjusting-free outer cup 20, and the acetabular cup prosthesis is guaranteed to be better matched with an acetabular socket of a patient and have better stability.

As shown in fig. 1 and 7, the adjustment cup 20 is provided with a plurality of hollow portions 23 extending in the height direction of the adjustment cup 20. Specifically, a plurality of the hollow portions 23 are radially disposed on the adjusting outer cup 20. The provision of the cutouts 23 makes the adjustment cup 20 more susceptible to deformation (i.e., movement between the initial retracted and expanded positions) by the adjustment post 30. Meanwhile, the hollow part 23 provides a space for the healthy bone of the patient to grow in, so that the connection between the implanted acetabular cup prosthesis and the healthy bone of the patient is firmer and more reliable.

As shown in fig. 1 and 3, the inner cup body 10 and the adjusting outer cup 20 are provided with an operating portion 117 for engaging with an operating tool on the side away from the mouth. The operation part 117 is arranged to facilitate the implantation of the prosthesis, so that the operation is more convenient. In this embodiment, the operation portion 117 is a circular hole, and in other possible embodiments, the operation portion may also be a polygonal hole.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An acetabular cup prosthesis, comprising:

an inner cup body (10) having an opening;

the adjusting outer cup (20) is sleeved on the outer side of the inner cup body (10);

a plurality of adjustment columns (30) arranged along the circumference of the acetabular cup prosthesis, wherein the plurality of adjustment columns (30) are movably arranged between the inner cup body (10) and the adjustment outer cup (20) in a penetrating way so as to enable the adjustment outer cup (20) to move between an initial retraction position and an expansion position;

adjust post (30) with adjust outer cup (20) complex one end and be provided with adjustable ring (31), adjust outer cup (20) have corresponding to the first open end of oral area, the first open end be provided with adjustable ring (31) complex arc mounting groove (21).

2. The acetabular cup prosthesis according to claim 1, wherein a plurality of adjusting holes (111) penetrating a plurality of adjusting columns (30) are formed in the inner cup body (10), a plurality of bosses (112) distributed along the circumferential direction of the inner cup body (10) are formed in the outer wall of the inner cup body (10), the plurality of bosses (112) and the plurality of adjusting holes (111) are arranged in a one-to-one correspondence manner, a plurality of first accommodating concave portions (22) accommodating the plurality of bosses (112) are formed at the first opening end, and the arc-shaped mounting groove (21) is located at the bottom of the first accommodating concave portions (22).

3. The acetabular cup prosthesis according to claim 2, wherein the adjustment post (30) further comprises a threaded section (32), the adjustment ring (31) being provided at one end of the threaded section (32), the adjustment bore (111) being provided with an internal thread cooperating with the threaded section (32).

4. The acetabular cup prosthesis according to claim 3, wherein the outer wall of the adjustment ring (31) is a conical surface having a cross-sectional area that gradually decreases in the direction of the threaded section (32) to the adjustment ring (31).

5. The acetabular cup prosthesis according to claim 3, wherein the inner cup (10) comprises a first cup (11) and a second cup (12) disposed within the first cup (11), the first cup (11) having a second open end corresponding to the mouth, a counter sink (113) being disposed on an inner sidewall of the second open end, the adjustment column (30) being located within the range of the counter sink (113).

6. The acetabular cup prosthesis according to claim 5, wherein an end of the adjustment column (30) remote from the adjustment ring (31) is provided with a cap body segment (33), an outer diameter of the cap body segment (33) is larger than an outer diameter of the threaded segment (32), an inner side wall of the second open end is provided with a second receiving recess (114) for receiving the cap body segment (33), the second receiving recess (114) is in communication with the adjustment hole (111) and is located at an end of the adjustment hole (111) remote from the adjustment outer cup (20), and a circumference of the second receiving recess (114) has a diameter larger than an inner diameter of the adjustment hole (111).

7. Acetabular cup prosthesis according to claim 6, characterised in that the outer side of the second cup (12) is provided with an anti-rotation protrusion (121), the anti-rotation protrusion (121) being provided in the second receiving recess (114).

8. The acetabular cup prosthesis according to claim 5, wherein a first groove (115) is provided on an inner wall of the first cup (11), a second groove (122) corresponding to the first groove (115) is provided on an outer wall of the second cup (12), the acetabular cup prosthesis further comprising a first snap (40) disposed within the first groove (115) and the second groove (122).

9. The acetabular cup prosthesis according to any one of claims 1 to 4, wherein the inner cup (10) comprises a first cup (11) and a second cup (12) arranged in the first cup (11), the acetabular cup prosthesis further comprising a second snap (50) connecting the second cup (12) and a liner located in the acetabular cup prosthesis, the second snap (50) comprising a body portion (51) and a connecting portion (52) connected between two ends of the body portion (51), and a third groove (123) accommodating the body portion (51) and a socket (124) communicating with the third groove (123) and allowing the connecting portion (52) to pass through are arranged inside the second cup (12).

10. Acetabular cup prosthesis according to claim 9, wherein the connection portion (52) comprises a first connection tab (521) connected to a first end of the body portion (51) and a second connection tab (522) connected to a second end of the body portion (51), the first connection tab (521) and the second connection tab (522) being arranged one above the other, one of the first connection tab (521) and the second connection tab (522) being provided with a connection runner (523) and the other with a connection post (524).

11. An acetabular cup prosthesis according to any one of claims 1 to 8, wherein the inner cup (10) comprises a cup body (13), the cup body (13) having a third open end corresponding to the mouth, the inner cup (10) further comprising a stop boss (14) provided at the third open end, a receiving recess (15) being provided between the cup body (13) and the stop boss (14), the first open end being provided within the receiving recess (15).

12. Acetabular cup prosthesis according to any one of claims 1 to 8, characterised in that a plurality of cutouts (23) are provided on the adjustment cup (20) extending in the height direction of the adjustment cup (20).