CN106983584A - Acetabular cup - Google Patents

Abstract

The present invention provides an acetabular cup assembly, comprising: an acetabular cup, the acetabular cup includes an acetabular cup main body and a guiding and fixing part arranged on the acetabular cup main body; The matching part on the main body of the filling block, the matching part cooperates with the guiding and fixing part; the fixing part, the fixing part cooperates with the acetabular cup and the filling block and fixes the acetabular cup and the filling block on the bone. The invention effectively solves the problem of connection and fixation of the filling block and the acetabular cup with the bone in the prior art.

Description

Acetabular Cup Components

technical field

The invention relates to the technical field of acetabular cups, in particular to an acetabular cup assembly.

Background technique

With the widespread development of artificial joint replacement, more and more patients need surgery, and artificial joint revision has become a routine operation. For the extensive bone defect of the acetabulum after hip replacement and the bone loss around the knee joint, there are many clinical reconstruction methods, one of which is bone grafting, the main purpose is to restore sufficient bone mass and mechanics as much as possible initial stability characteristics.

Bone defects are very common in arthroplasty revision. For small defects, granular bone grafting, structural bone grafting, or enlarged diameter of the revision prosthesis can be used to reconstruct small defects, and good results can be obtained. However, when the defect is serious, the revision is often very difficult. The difficulty lies in the lack of an effective supporting structure. At present, metal bone defect filling is a relatively accepted method. This method can not only ensure the good support of the metal bone, but also The loss of bone graft material can be effectively avoided. The metal bone defect filling prosthesis generally adopts a spherical crescent-shaped structure. During the operation, the original deformed or diseased acetabulum needs to be ground, and after grinding out a suitable shape, the prosthesis is fixed on the bone bed by screws. Then put the acetabular cup into the formed acetabular socket, the acetabular socket and the patch are bonded by bone cement or not processed, but just extruded and embedded, so there is often no good connection To prevent misalignment, slippage and fixation between the patch and the acetabular cup.

Contents of the invention

The main purpose of the present invention is to provide an acetabular cup assembly to solve the problem of connection and fixation of the filling block and the acetabular cup with the bone in the prior art.

In order to achieve the above object, the present invention provides an acetabular cup assembly, including: an acetabular cup, the acetabular cup includes an acetabular cup main body and a guiding and fixing part arranged on the acetabular cup main body; a filling block, the filling block includes a filling The main body of the block and the matching part arranged on the main body of the filling block, the matching part cooperates with the guiding and fixing part; the fixing part, the fixing part cooperates with both the acetabular cup and the filling block and fixes the acetabular cup and the filling block on the bone.

Further, the guiding and fixing part is a rib provided on the outer wall of the acetabular cup main body, the matching part is a groove provided on the inner wall of the filling block, or the guiding and fixing part is a concave groove provided on the outer wall of the acetabular cup main body. The groove and the matching part are raised ribs arranged on the inner wall of the filling block.

Further, the guiding and fixing part is a rib provided on the outer wall of the main body of the acetabular cup, and the matching part is a groove provided on the inner wall of the filling block, and the rib is arranged along the mouth of the acetabular cup to the bottom of the acetabular cup direction extension.

Further, there are multiple ribs, two ribs are arranged opposite to each other and form a group, and there are multiple grooves and are provided in one-to-one correspondence with the multiple ribs.

Further, the filling block includes a first end and a second end oppositely arranged, and the groove runs through the first end and the second end of the filling block, so that the filling block slides into the rib of the acetabular cup through the groove.

Further, the ribs are arranged obliquely relative to the outer wall of the main body of the acetabular cup.

Further, the distance between the two ribs forming a group gradually becomes larger from the root of the rib to the free end than the distance between the ends of the corresponding two ribs.

Further, there are multiple sets of ribs, and there are multiple filling blocks that correspond one-to-one to the multiple sets of ribs.

Further, the fixing member is a screw, and the filler block is provided with a screw hole matched with the screw.

Further, the screw includes a screw head, a first thread segment and a second thread segment, the first thread segment is located between the screw head and the second thread segment, the first thread segment matches the screw hole, and the second thread segment matches the bone , the second thread segment is the thread structure of the cancellous bone screw.

Applying the technical solution of the present invention, the guiding and fixing part of the acetabular cup main body and the matching part of the filling block cooperate, so that the acetabular cup main body and the filling block fit together, and the fixing part fixes the acetabular cup main body and the filling block together, And the fixing part fixes the main body of the acetabular cup and the filling block together on the bone, so that the main body of the acetabular cup and the filling block match their own structures, and the fixing part fixes the main body of the acetabular cup and the filling block together and fixes them on the bone. The technical scheme of the invention effectively solves the problem of connection and fixation of the filling block and the acetabular cup with the bone in the prior art.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 shows a schematic perspective view of Embodiment 1 of an acetabular cup assembly according to the present invention;

Figure 2 shows a schematic front view of the acetabular cup assembly of Figure 1;

Figure 3 shows a schematic side view of the acetabular cup assembly of Figure 1;

Figure 4 shows a schematic perspective view of the acetabular cup of the acetabular cup assembly of Figure 1;

Figure 5 shows a schematic front view of the acetabular cup of Figure 4;

Figure 6 shows a schematic side view of the acetabular cup of Figure 4;

Fig. 7 shows a schematic diagram of the cooperation of the filling block and the fixture of the acetabular cup assembly of Fig. 1;

Fig. 8 shows a schematic front view of the filling block and the fixing part of Fig. 7;

Fig. 9 shows another perspective view of the filling block and the fixing member of Fig. 7; and

Fig. 10 shows a schematic perspective view of the fixture of the acetabular cup assembly of Fig. 1 .

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Acetabular cup; 11. Main body of acetabular cup; 12. Guide and fixation part; 20. Filler block; 21. Main body of filler block; 22. Fitting part; 23. Screw hole; 30. Fixing piece; 31. Screw head; 32. The first thread segment; 33. The second thread segment.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. 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 the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. These example embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of these exemplary embodiments to those of ordinary skill in the art. In the drawings, the layers are exaggerated for clarity and the thickness of the region, and the same reference numerals are used to designate the same devices, and thus their descriptions will be omitted.

As shown in FIGS. 1 to 10 , the acetabular cup assembly of the first embodiment includes: an acetabular cup 10 , a filling block 20 and a fixing member 30 . The acetabular cup 10 includes an acetabular cup main body 11 and a guiding and fixing part 12 provided on the acetabular cup main body 11 . The filling block 20 includes a filling block main body 21 and a matching portion 22 disposed on the filling block main body 21 , and the matching portion 22 is matched with the guiding and fixing portion 12 . The fixing part 30 cooperates with both the acetabular cup 10 and the filling block 20 and fixes the acetabular cup 10 and the filling block 20 on the bone.

Applying the technical solution of Embodiment 1, the guiding and fixing part 12 of the acetabular cup main body 11 cooperates with the matching part 22 of the filling block 20, so that the acetabular cup main body 11 and the filling block 20 are fitted together, and the fixing part connects the acetabular cup main body 11 and the filling block 20 are fixed together, and the fixing part 30 fixes the acetabular cup main body 11 and the filling block 20 on the bone together, so that the acetabular cup main body 11 and the filling block 20 are self-structured, and the fixing part 30 fixes the acetabular The cup body 11 and filler block 20 are fixed together while being fixed to the bone. The technical solution of the first embodiment effectively solves the problem of connection and fixation of the filling block and the acetabular cup with the bone in the prior art.

As shown in Figures 1 to 10, in the technical solution of Embodiment 1, the guiding and fixing part 12 is a rib provided on the outer wall of the acetabular cup main body 11, and the matching part 22 is a rib provided on the inner wall of the filling block 20. groove. The above structure is easy to process and has low manufacturing cost. For example, the guiding and fixing part 12 and the acetabular cup main body 11 are integrally formed. The grooves on the inner wall of the filling block 20 are injection molded, so the processing is more convenient and the production of the product is faster.

As shown in Figures 1 to 6, in the technical solution of Embodiment 1, the guiding and fixing part 12 is a convex rib provided on the outer wall of the acetabular cup main body 11, and the matching part 22 is a concave groove provided on the inner wall of the filling block 20. The grooves and ribs extend along the direction from the mouth of the acetabular cup 10 to the bottom of the acetabular cup 10 . Such a structure can easily make the acetabular cup main body 11 and the filling block fit together easily, and the installation between the acetabular cup main body 11 and the filling block 20 is convenient.

As shown in Figures 1 to 6, in the technical solution of Embodiment 1, there are multiple ribs, two ribs are arranged opposite each other and form a group, and there are multiple grooves corresponding to the ribs one by one. set up. There are a plurality of ribs, and the grooves are arranged in a one-to-one correspondence with the plurality of ribs, so that the ribs can realize multi-dimensional restrictions on the filling block 20, and the restriction on the filling block 20 is relatively firm, and the ribs do not Easily damaged.

As shown in Figures 1 to 10, in the technical solution of Embodiment 1, the filling block 20 includes a first end and a second end oppositely arranged, and the groove penetrates through the first end and the second end of the filling block 20, so that The filling block 20 slides into the rib of the acetabular cup 10 through the groove. The installation of filling block 20 is more convenient and convenient like this. Of course, as those skilled in the art know, it is also possible for the groove of the filling block 20 to be directly installed on the rib.

As shown in FIGS. 1 to 10 , in the technical solution of the first embodiment, the ribs are arranged obliquely relative to the outer wall of the acetabular cup main body 11 . In this way, the ribs can realize multi-dimensional limitation on the filler block 20, for example, the filler block 20 can only slide along the ribs relative to the acetabular cup body 11, without the filler block 20 and the acetabular cup body 11 Relative movement between other positions.

As shown in Figures 1 to 10, in the technical solution of Embodiment 1, the distance between the two ribs forming a group gradually increases from the root of the ribs to the free end less than that of the corresponding two ribs. The distance from the ends of the tendons. Such a structure ensures the relative movement between the filling block 20 and the acetabular cup main body 11 on the one hand, and on the other hand, such a structure facilitates processing. Specifically, the two ribs form a dovetail structure.

As shown in FIGS. 1 to 9 , in the technical solution of the first embodiment, there are multiple sets of ribs, and there are multiple filling blocks 20 that correspond one-to-one to the multiple sets of ribs. In this way, the flexible arrangement of the filling blocks 20 can be realized. For example, when there are many bone defects, multiple filling blocks 20 can be set. Of course, as those skilled in the art know, the shape of the filling block 20 can also be flexibly set, for example, it can be set as an arc-shaped or planar structure.

As shown in FIGS. 7 to 10 , in the technical solution of the first embodiment, the fixing member 30 is a screw, and the filler block 20 is provided with a screw hole 23 matching with the screw. The setting of the fixing member 30 limits the degree of freedom that the filling block 20 can slide relative to the rib. Specifically, the screw holes 23 are arranged between two ribs in an adjacent group. More specifically, two screw holes 23 are provided between the two raised ribs in one group. Certainly, as those skilled in the art know, a plurality of screw holes 23 may be provided between two raised ribs in one group as required.

As shown in Figures 7 to 10, in the technical solution of Embodiment 1, the screw includes a screw head 31, a first thread segment 32 and a second thread segment 33, and the first thread segment 32 is located between the screw head 31 and the second thread segment. 33, the first threaded segment 32 is matched with the screw hole 23, the second threaded segment 33 is matched with the bone, and the second threaded segment 33 is the threaded structure of the cancellous bone screw. The second thread segment 33 is the thread structure of the cancellous bone screw, so that the screw fits more firmly with the bone, and the occlusal fixation of such thread in the bone can have greater pull-out resistance. The first thread segment 32 may be a conventional thread, so that the processing difficulty is relatively low, and the processing cost is relatively low. Generally speaking, the pitch of the second thread segment 33 is greater than the pitch of the first thread segment 32 .

The difference between the technical solution of Embodiment 2 and Embodiment 1 is that the guiding and fixing part 12 is a groove provided on the outer wall of the acetabular cup body 11 , and the matching part 22 is a rib provided on the inner wall of the filling block 20 .

The acetabular cup assembly of the second embodiment includes: an acetabular cup 10 , a filling block 20 and a fixing piece 30 . The acetabular cup 10 includes an acetabular cup main body 11 and a guiding and fixing part 12 provided on the acetabular cup main body 11 . The filling block 20 includes a filling block main body 21 and a matching portion 22 disposed on the filling block main body 21 , and the matching portion 22 is matched with the guiding and fixing portion 12 . The fixing part 30 cooperates with both the acetabular cup 10 and the filling block 20 and fixes the acetabular cup 10 and the filling block 20 on the bone.

Applying the technical solution of Embodiment 2, the guiding and fixing part 12 of the acetabular cup main body 11 cooperates with the mating part 22 of the filling block 20, so that the acetabular cup main body 11 and the filling block 20 are fitted together, and the fixing part connects the acetabular cup main body 11 and the filling block 20 are fixed together, and the fixing part 30 fixes the acetabular cup main body 11 and the filling block 20 on the bone together, so that the acetabular cup main body 11 and the filling block 20 are self-structured, and the fixing part 30 fixes the acetabular The cup body 11 and filler block 20 are fixed together while being fixed to the bone. The technical solution of the second embodiment effectively solves the problem of connection and fixation of the filling block and the acetabular cup with the bone in the prior art.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An acetabular cup assembly, characterized in that, comprising: An acetabular cup (10), the acetabular cup (10) comprising an acetabular cup main body (11) and a guiding and fixing part (12) arranged on the acetabular cup main body (11); A filling block (20), the filling block (20) comprising a filling block main body (21) and a fitting part (22) arranged on the filling block main body (21), the fitting part (22) and the guide The fixed part (12) cooperates; A fixing part (30), the fixing part (30) is matched with the acetabular cup (10) and the filling block (20) and the acetabular cup (10) and the filling block (20) fixed on the bone. 2. The acetabular cup assembly according to claim 1, characterized in that, the guiding and fixing part (12) is a rib provided on the outer wall of the acetabular cup main body (11), and the matching part ( 22) is a groove arranged on the inner wall of the filling block (20), or The guiding and fixing part (12) is a groove provided on the outer wall of the acetabular cup body (11), and the matching part (22) is a rib provided on the inner wall of the filling block (20) . 3. The acetabular cup assembly according to claim 1, characterized in that, the guiding and fixing part (12) is a convex rib arranged on the outer wall of the acetabular cup main body (11), and the matching part ( 22) is a groove provided on the inner wall of the filling block (20), and the rib extends along the direction from the mouth of the acetabular cup (10) to the bottom of the acetabular cup (10). 4. The acetabular cup assembly according to claim 3, wherein there are a plurality of said ribs, two of said ribs are oppositely arranged and form a group, and there are a plurality of said grooves and are connected with a plurality of ribs. The ribs are arranged in one-to-one correspondence. 5. The acetabular cup assembly according to claim 4, wherein the filling block (20) comprises a first end and a second end oppositely arranged, and the groove runs through the filling block (20) The first end and the second end enable the filling block (20) to slide into the rib of the acetabular cup (10) through the groove. 6. The acetabular cup assembly according to claim 4 or 5, characterized in that, the ribs are arranged obliquely relative to the outer wall of the acetabular cup main body (11). 7. The acetabular cup assembly according to claim 6, wherein the distance between the two ribs forming a group gradually increases from the root of the ribs to the free end less than the corresponding The distance between the ends of the two ribs. 8. The acetabular cup assembly according to claim 4 or 5, wherein the ribs are in multiple groups, and the filling block (20) is a plurality of ribs corresponding to the multiple groups of ribs one-to-one. . 9. The acetabular cup assembly according to any one of claims 1 to 5, characterized in that, the fixing member (30) is a screw, and the filling block (20) is provided with a screw holes (23). 10. The acetabular cup assembly according to claim 9, wherein the screw comprises a screw head (31), a first threaded section (32) and a second threaded section (33), the first threaded section (32) is located between the screw head (31) and the second threaded section (33), the first threaded section (32) is matched with the screw hole (23), and the second threaded section ( 33) Matching with the bone, the second thread segment (33) is a thread structure of a cancellous bone screw.