A cup for acetabular surgery

Abstract

The application discloses an acetabular cup for acetabular surgery, which adopts a multilayer structure, namely a first acetabular cup and a second acetabular cup, and the two are connected through an acetabular cup spacer block, the acetabular cup spacer block can prevent the relative movement between the first acetabular cup and the second acetabular cup, improve the stability and wear resistance of the acetabular cup, prolong the service life of the acetabular cup, the first acetabular cup and the second acetabular cup are both trabecular bone structure and are both hollow hemispheres, and have high porosity, so that the biomechanical adaptability of the acetabular cup can be improved, the growth of bone tissue and the fixation of the acetabular cup can be promoted, the stress concentration and osteolysis of the acetabular cup can be reduced, the biocompatibility and corrosion resistance of the acetabular cup can be improved, and a plurality of groups of internal thread base holes are formed in the first acetabular cup, the second acetabular cup and the acetabular cup spacer block, so that the installation and fixation of the acetabular cup are facilitated, and thus the accurate positioning and close connection of the acetabular cup are realized.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an acetabular cup for acetabular surgery. Background Technology

[0002] The key to successful acetabular revision surgery is achieving stable fixation between the acetabular cup and the remaining host bone. The amount of remaining supportive bone plays a crucial role in the success of acetabular revision. The Paprosky classification is the most commonly used system for determining the location and extent of acetabular bone loss. Common acetabular revision procedures include: lining replacement, raising the center of rotation, elliptical cups, trabecular bone reconstruction cups and pads, bipolar cups, structural bone grafts, cemented cups, uncemented cups (including the extra-large Jumbocup), acetabular reinforcement materials (such as cages), and trabecular metal cup cages.

[0003] The optimal treatment plan depends on the degree of acetabular discontinuity, available bone volume, and the possibility of achieving stable fixation with the host bone. Accurate preoperative and intraoperative assessment of bone defects is crucial, and the appropriate acetabular revision method should be selected based on this assessment. Achieving initial prosthesis stability through suitable techniques, such as precise bone grafting, and ensuring stable prosthesis fixation are essential for successful acetabular revision surgery. Severe supra- and medial acetabular bone defects are commonly addressed in hip revision surgery using a large-capacity cup (66mm) with reinforcing tantalum blocks, reconstructed titanium mesh, or a cup-cage technique. When preoperative planning suggests that these techniques may be insufficient to reconstruct vertical and horizontal eccentricities (failure to reconstruct eccentricities can lead to risks such as impingement, leg length discrepancy, abduction weakness, and dislocation), a cup-in-cup / cup-on-cup technique can be used to reconstruct the rotation center.

[0004] Hip replacement surgery is a common surgical procedure for treating hip joint diseases, primarily used for cases of hip degenerative diseases, hip dysplasia, hip arthritis, and hip necrosis. The goal of hip replacement surgery is to restore hip joint function and stability, relieve patient pain and discomfort, and improve quality of life by implanting an artificial acetabular cup and femoral head prosthesis.

[0005] The existing acetabular reconstruction techniques have the following problems:

[0006] (1) Reconstructing the acetabulum on the pelvic side is difficult and requires advanced techniques:

[0007] Reconstructing the acetabulum on the pelvic side with severe bone defects requires numerous implants, such as autologous bone, allogeneic bone, bone cement, or metal implants, to obtain a hemispherical surface with relative strength. This procedure demands extremely high levels of surgeon experience and surgical skill, and increases the risk of infection and surgical costs.

[0008] (2) Poor stability of the reconstructed hip joint:

[0009] Due to the influence of residual bone, the size and direction of the acetabulum are limited, and the compromised position of the acetabulum often cannot provide sufficient stability. Secondly, the reconstructed acetabulum is often large, even using an extra-large cup jumbocup, resulting in an excessively large ball-acetabulum diameter ratio, limited range of motion of the hip joint, and a relatively increased risk of dislocation due to impact.

[0010] Therefore, developing a new type of acetabular cup for acetabular surgery to overcome the shortcomings of existing technologies and improve the performance and safety of artificial hip joints is an urgent need in the field of hip replacement surgery. Summary of the Invention

[0011] The purpose of this invention is to provide an acetabular cup for acetabular surgery to solve the problems existing in the prior art as described in the background section.

[0012] To achieve the above objectives, the present invention provides the following technical solution: an acetabular cup for acetabular surgery, comprising a first acetabular cup, a second acetabular cup, and an acetabular cup pad;

[0013] The first acetabular cup has several sets of first internal thread base holes extending through it.

[0014] The second acetabular cup has several sets of second internal thread base holes extending through it;

[0015] The acetabular cup pad is connected between the first acetabular cup and the second acetabular cup, and a central internal threaded hole is formed through the acetabular cup pad.

[0016] Preferably, the first acetabular cup has a trabecular bone structure, is a hollow hemispherical shape, and has a porosity of 60%.

[0017] Preferably, the inner diameter of the first internal thread base hole is 300 μm.

[0018] Preferably, the second acetabular cup has a trabecular bone structure, is a hollow hemispherical shape, and has a porosity of 60%.

[0019] Preferably, the inner diameter of the second internal thread base hole is 300 μm.

[0020] Preferably, the acetabular cup pad has a trabecular bone structure, the outer surface of the acetabular cup pad is adapted to the inner wall of the first acetabular cup, and the side of the acetabular cup pad near the second acetabular cup is concave.

[0021] Preferably, the surfaces of the first acetabular cup, the second acetabular cup, and the acetabular cup pad are all roughened.

[0022] Preferably, the first acetabular cup and the second acetabular cup are rotated so that the first internal thread base hole and the second internal thread base hole are respectively aligned with the position of the intermediate internal thread base hole.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. The acetabular cup used in this acetabular surgery adopts a multi-layer structure, namely a first acetabular cup and a second acetabular cup, which are connected by an acetabular cup pad. The acetabular cup pad can play an anti-slip role, prevent relative movement between the first acetabular cup and the second acetabular cup, improve the stability and wear resistance of the acetabular cup, and extend the service life of the acetabular cup.

[0025] 2. Both the first and second acetabular cups used in this acetabular surgery have a trabecular bone structure and are hollow hemispherical with high porosity. This can increase the biomechanical adaptability of the acetabular cup, promote bone growth and fixation of the acetabular cup, reduce stress concentration and osteolysis of the acetabular cup, and improve the biocompatibility and corrosion resistance of the acetabular cup.

[0026] 3. The surfaces of the first acetabular cup, the second acetabular cup, and the acetabular cup pad of the acetabular surgical cup are all roughened to increase the friction coefficient of the acetabular cup, reduce the sliding and wear of the acetabular cup, and improve the wear resistance and stability of the acetabular cup;

[0027] 4. The first acetabular cup, the second acetabular cup, and the acetabular cup pad of this acetabular surgical cup are provided with several sets of internally threaded base holes to facilitate the installation and fixation of the acetabular cup, thereby achieving precise positioning and tight connection of the acetabular cup. Attached Figure Description

[0028] Figure 1 This is a front structural cross-sectional view of an embodiment 1 of the acetabular cup for acetabular surgery according to the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to Embodiment 1 of the present invention;

[0030] Figure 3 This is a front structural cross-sectional view of an embodiment 2 of the acetabular cup for acetabular surgery according to the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to Embodiment 2 of the present invention;

[0032] Figure 5 This is a front structural cross-sectional view of an embodiment 3 of the acetabular cup for acetabular surgery according to the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to Embodiment 3 of the present invention;

[0034] Figure 7 This is a front structural cross-sectional view of an embodiment 4 of the acetabular cup for acetabular surgery according to the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to Embodiment 4 of the present invention;

[0036] Figure 9 This is a front structural cross-sectional view of an embodiment 5 of the acetabular cup for acetabular surgery according to the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to embodiment 5 of the present invention;

[0038] Figure 11 This is a front structural cross-sectional view of an embodiment 6 of the acetabular cup for acetabular surgery according to the present invention;

[0039] Figure 12 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to Embodiment 6 of the present invention;

[0040] Figure 13 This is a front structural cross-sectional view of an embodiment 7 of the acetabular cup for acetabular surgery according to the present invention;

[0041] Figure 14 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to embodiment 7 of the present invention;

[0042] Figure 15 This is a front structural cross-sectional view of an embodiment 8 of the acetabular cup for acetabular surgery according to the present invention;

[0043] Figure 16 This is a schematic diagram of the structure of an acetabular cup for acetabular surgery according to embodiment 8 of the present invention;

[0044] Figure 17 This is an exploded view of an embodiment 3 of the acetabular cup for acetabular surgery according to the present invention;

[0045] Figure 18 This is a schematic diagram of the connection structure between the first acetabular cup and the acetabular cup pad block in Embodiment 3 of the present invention for an acetabular surgical cup.

[0046] In the picture:

[0047] 1. First acetabular cup; 11. First internal thread base hole;

[0048] 2. Second acetabular cup; 21. Second internal thread base hole;

[0049] 3. Achilles cup pad; 31. Intermediate internal thread base hole. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] Please see Figure 1-18 The present invention provides a technical solution: an acetabular cup for acetabular surgery, comprising a first acetabular cup 1, a second acetabular cup 2, and an acetabular cup pad 3.

[0054] The first acetabular cup 1 has several sets of first internal thread base holes 11 that are opened through it.

[0055] The first acetabular cup 1 has a trabecular bone structure and is a hollow hemispherical shape with a porosity of 60%. Specifically, the first acetabular cup 1's trabecular bone structure and high porosity effectively increase the biomechanical adaptability of the acetabular cup, promote bone tissue growth, and facilitate the fixation of the acetabular cup.

[0056] The inner diameter of the first internal thread base hole 11 is 300 μm.

[0057] The second acetabular cup 2 has several sets of second internal thread base holes 21 that are opened through it.

[0058] The second acetabular cup 2 has a trabecular bone structure and is a hollow hemispherical shape with a porosity of 60%. Specifically, the trabecular bone structure of the second acetabular cup 2 has a high porosity, which increases the biomechanical adaptability of the acetabular cup and promotes bone tissue growth and acetabular cup fixation.

[0059] The inner diameter of the second internal thread base hole 21 is 300 μm. Specifically, the first internal thread base hole 11 and the second internal thread base hole 21 facilitate the installation and fixation of the acetabular cup.

[0060] The acetabular cup pad 3 is connected between the first acetabular cup 1 and the second acetabular cup 2, and a central internal threaded base hole 31 is opened through the acetabular cup pad 3.

[0061] Specifically, the inner diameter of the intermediate internal thread base hole 31 is 300um.

[0062] The acetabular cup pad 3 has a trabecular bone structure. The outer surface of the acetabular cup pad 3 is adapted to the inner wall of the first acetabular cup 1, and the side of the acetabular cup pad 3 closest to the second acetabular cup 2 is concave. Specifically, this increases the contact area between the first acetabular cup 1 and the acetabular cup pad 3, reducing the sliding and wear of the acetabular cup.

[0063] The surfaces of the first acetabular cup 1, the second acetabular cup 2, and the acetabular cup pad 3 are all roughened. Specifically, this increases the coefficient of friction of the first acetabular cup 1, the second acetabular cup 2, and the acetabular cup pad 3, reduces sliding and wear between them, and improves the wear resistance and stability of the acetabular cups.

[0064] The first acetabular cup 1 and the second acetabular cup 2 are rotated so that the first internal thread base hole 11 and the second internal thread base hole 21 correspond to the positions of the intermediate internal thread base hole 31, respectively. Specifically, by setting several sets of first internal thread base holes 11 and several sets of second internal thread base holes 21, multi-position adjustment of the first acetabular cup 1 and the second acetabular cup 2 can be achieved, realizing precise positioning and tight connection of the acetabular cups, effectively improving the applicability of different acetabular surgeries.

[0065] Specifically, the first acetabular cup 1, the second acetabular cup 2, and the acetabular cup pad 3 can all be manufactured by laser cladding 3D printing, and the thickness of the first acetabular cup 1 and the second acetabular cup 2 is uniform.

[0066] Specifically, depending on the actual needs of use, the first acetabular cup 1, the second acetabular cup 2, and the acetabular cup pad 3 can be manufactured to the corresponding specifications through laser cladding process.

[0067] Example 1

[0068] Reference manual attached Figure 1-2The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 45 mm, and the inner diameter of the second acetabular cup 2 is 45 mm.

[0069] Example 2

[0070] Reference manual attached Figure 3-4 The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 45 mm, and the inner diameter of the second acetabular cup 2 is 50 mm.

[0071] Example 3

[0072] Reference manual attached Figure 5-6 The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 45 mm, and the inner diameter of the second acetabular cup 2 is 55 mm.

[0073] Example 4

[0074] Reference manual attached Figure 7-8 The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 50 mm, and the inner diameter of the second acetabular cup 2 is 45 mm.

[0075] Example 5

[0076] Reference manual attached Figure 9-10 The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 50 mm, and the inner diameter of the second acetabular cup 2 is 50 mm.

[0077] Example 6

[0078] Reference manual attached Figure 11-12 The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 50 mm, and the inner diameter of the second acetabular cup 2 is 55 mm.

[0079] Example 7

[0080] Reference manual attached Figure 13-14 The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 55 mm, and the inner diameter of the second acetabular cup 2 is 50 mm.

[0081] Example 8

[0082] Reference manual attached Figure 14-15 The inner diameter of the first acetabular cup 1 and the outer diameter of the acetabular cup pad 3 are both 55 mm, and the inner diameter of the second acetabular cup 2 is 55 mm.

[0083] Detection example

[0084] To evaluate the performance and safety of the acetabular cup for acetabular surgery of the present invention, the following tests were performed on the acetabular cups of different embodiments:

[0085] 1. Mechanical property testing of acetabular cup: The static load test and fatigue test of the acetabular cup were carried out according to the method specified in the international standard ISO 7206-4:2010, and the static strength and fatigue life of the acetabular cup were measured respectively.

[0086] 2. Biocompatibility testing of acetabular cups: The acetabular cups were tested for cytotoxicity, sensitization, short-term implantation and long-term implantation using the methods specified in the international standard ISO 10993-1:2009. The cytotoxicity, sensitization and acute and chronic local tissue reactions of the acetabular cups were evaluated respectively.

[0087] 3. Wear resistance test of acetabular cup: The acetabular cup is subjected to a simulated joint motion test according to the method specified in the international standard ISO 14242-1:2012. The load and motion conditions of the artificial hip joint are simulated, and the wear amount and wear rate of the acetabular cup are measured.

[0088] Physicochemical properties:

[0089] Based on the above testing methods, the physicochemical properties of the acetabular cups of different embodiments were measured and statistically analyzed, and the results are shown in the table below.

[0090]

[0091] Based on the above physicochemical index table, the following data and conclusions can be drawn:

[0092] In terms of data, the acetabular cups of different embodiments have achieved high levels in terms of mechanical properties, biocompatibility and wear resistance, meeting the requirements of international standards, indicating that the acetabular cup of the present invention has excellent performance and safety.

[0093] In conclusion, the acetabular cups of different embodiments differ in the combination of inner and outer diameter lengths. This is mainly to accommodate the different sizes and shapes of the hip joints of different patients, improving the adaptability and comfort of the acetabular cup. Furthermore, the difference in the inner diameter length of the first acetabular cup 1 and the second acetabular cup 2 has a certain impact on the physicochemical properties of the acetabular cup. Generally speaking, the larger the inner diameter length, the higher the wear amount and wear rate of the acetabular cup, but the lower the static strength and fatigue life of the acetabular cup. Therefore, a trade-off and selection between these two aspects is necessary.

[0094] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An acetabular cup for acetabular surgery, characterized in that: It includes a first acetabular cup (1), a second acetabular cup (2), and an acetabular cup pad (3); The first acetabular cup (1) has several sets of first internal thread base holes (11) through it; The second acetabular cup (2) has several sets of second internal thread base holes (21) through it; The acetabular cup pad (3) is connected between the first acetabular cup (1) and the second acetabular cup (2), and a central internal threaded base hole (31) is opened through the acetabular cup pad (3).

2. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The first acetabular cup (1) has a trabecular bone structure, the first acetabular cup (1) is a hollow hemispherical structure, and the porosity of the first acetabular cup (1) is 60%.

3. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The inner diameter of the first internal thread base hole (11) is 300 μm.

4. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The second acetabular cup (2) has a bone-like trabecular structure, the second acetabular cup (2) is a hollow hemispherical structure, and the porosity of the second acetabular cup (2) is 60%.

5. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The inner diameter of the second internal thread base hole (21) is 300 μm.

6. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The acetabular cup pad (3) has a trabecular bone structure. The outer surface of the acetabular cup pad (3) is adapted to the inner wall of the first acetabular cup (1). The side of the acetabular cup pad (3) near the second acetabular cup (2) is concave.

7. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The surfaces of the first acetabular cup (1), the second acetabular cup (2), and the acetabular cup pad (3) are all roughened.

8. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The first acetabular cup (1) and the second acetabular cup (2) are rotated so that the first internal thread base hole (11) and the second internal thread base hole (21) correspond to the positions of the middle internal thread base hole (31).

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