Acetabular cup for acetabular surgery

Abstract

The utility model discloses an acetabular cup for the acetabular surgery, the acetabular cup for the acetabular surgery adopts the acetabular cup of a multi-layer structure, namely a first acetabular cup and a second acetabular cup, the first acetabular cup and the second acetabular cup are connected through an acetabular cup cushion block, and the acetabular cup cushion block can play an anti-skidding role to prevent the relative movement between the first acetabular cup and the second acetabular cup. The stability and wear resistance of the acetabular cup are improved, the service life of the acetabular cup is prolonged, the first acetabular cup and the second acetabular cup are both of a bone trabecula-like structure, are both arranged in a hemispheroid hollow mode and have high porosity, and therefore the biomechanical adaptability of the acetabular cup can be improved, growth of bone tissue and fixation of the acetabular cup can be promoted, and the acetabular cup can be used for manufacturing the acetabular cup. According to the acetabular cup, stress concentration and osteolysis of the acetabular cup are reduced, the biocompatibility and corrosion resistance of the acetabular cup are improved, a plurality of sets of internal thread base holes are formed in the first acetabular cup, the second acetabular cup and the acetabular cup cushion block in a penetrating mode so that the acetabular cup can be conveniently installed and fixed, and therefore accurate positioning and tight connection of the acetabular cup are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an acetabular cup for acetabular surgery. Background Art

[0002] The key to successful acetabular revision is to obtain stable fixation between the acetabular cup and the residual host bone. The residual supportive bone volume plays an important role in the success of acetabular revision. The Paprosky classification is the most commonly used classification system to determine the location and extent of acetabular bone loss. Common acetabular revision measures include: relining, raising the center of rotation, elliptical cup, trabecular reconstruction cup and spacer, bipolar cup, structural bone graft, bone cement cup, non-bone cement cup (including the extra-large cup Jumbocup), acetabular reinforcement materials (such as Cage), trabecular metal cup cage, etc.

[0003] The best treatment plan depends on the degree of acetabular discontinuity, the available bone mass, and the possibility of achieving stable fixation with the host bone. Accurate assessment of bone defects before and during surgery, and selection of appropriate acetabular revision methods based on the assessment of bone defects; obtaining initial stability of the prosthesis through appropriate techniques, such as precise bone grafting, and stable fixation of the prosthesis are essential for acetabular revision surgery. Severe superior and medial acetabular bone defects are often solved in hip revision surgery using an oversized cup (Jumbo, 66mm) and enhanced tantalum blocks, reconstruction titanium mesh, or cup-cage technology. When preoperative planning indicates that these aforementioned technologies may be difficult to reconstruct vertical and horizontal eccentricity (failure of eccentricity reconstruction may lead to risks such as impingement, unequal length of lower limbs, abduction weakness, and dislocation), the "cup-in-cup / cup-on-cup" technique can be selected to reconstruct the rotation center.

[0004] Hip replacement is a common surgical method for treating hip joint diseases, mainly used for cases of hip degenerative lesions, hip dysplasia, hip arthritis, hip necrosis, etc. The purpose of hip replacement is to restore the function and stability of the hip joint, relieve the patient's pain and discomfort, and improve the quality of life by implanting an artificial acetabular cup and femoral head prosthesis.

[0005] The problems with existing acetabular reconstruction techniques are as follows:

[0006] (1) Reconstructing the acetabulum on the pelvic side is difficult and requires high technical skills:

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

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

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

[0010] Therefore, it is an urgent need in the field of hip replacement to develop a new type of acetabular cup for acetabular surgery to overcome the shortcomings of the existing technology and improve the performance and safety of artificial hip joints. Utility Model Content

[0011] The purpose of the utility model is to provide an acetabular cup for acetabular surgery to solve the problems existing in the prior art mentioned in the above background technology.

[0012] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: 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 is provided with a plurality of first internally threaded base holes extending therethrough;

[0014] The second acetabular cup is provided with a plurality of groups of second internally threaded base holes extending therethrough;

[0015] The acetabular cup pad is connected between the first acetabular cup and the second acetabular cup, and a middle internal thread base hole is provided through the acetabular cup pad.

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

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

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

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

[0020] Preferably, the acetabular cup pad is a trabecular structure, the outer surface of the acetabular cup pad is matched with the inner wall surface of the first acetabular cup, and the acetabular cup pad is concave on the side close to the second acetabular cup.

[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 internally threaded base hole and the second internally threaded base hole correspond to the positions of the middle internally threaded base hole respectively.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. The acetabular cup for acetabular surgery adopts a multi-layered acetabular cup, 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 the 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. The first acetabular cup and the second acetabular cup of the acetabular cup for acetabular surgery are both trabecular structures, and are both hollow hemispherical structures with high porosity, which can increase the biomechanical adaptability of the acetabular cup, promote the growth of bone tissue and the fixation of the acetabular cup, reduce stress concentration and bone dissolution 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 cup for acetabular surgery 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 the acetabular cup for acetabular surgery are provided with a plurality of groups of internal threaded base holes for facilitating the installation and fixation of the acetabular cup, thereby achieving accurate positioning and tight connection of the acetabular cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front structural cross-sectional view of Example 1 of an acetabular cup for acetabular surgery of the utility model;

[0029] Figure 2 This is a schematic structural diagram of Embodiment 1 of an acetabular cup for acetabular surgery according to the utility model;

[0030] Figure 3 It is a front structural cross-sectional view of Example 2 of an acetabular cup for acetabular surgery of the utility model;

[0031] Figure 4 It is a structural schematic diagram of Embodiment 2 of an acetabular cup for acetabular surgery according to the utility model;

[0032] Figure 5 It is a front structural cross-sectional view of Example 3 of an acetabular cup for acetabular surgery of the utility model;

[0033] Figure 6This is a schematic structural diagram of Embodiment 3 of an acetabular cup for acetabular surgery according to the utility model;

[0034] Figure 7 It is a front structural cross-sectional view of Example 4 of an acetabular cup for acetabular surgery of the utility model;

[0035] Figure 8 It is a structural schematic diagram of a fourth embodiment of an acetabular cup for acetabular surgery according to the utility model;

[0036] Fig. 9 It is a front structural cross-sectional view of Example 5 of an acetabular cup for acetabular surgery of the utility model;

[0037] Fig.10 It is a structural schematic diagram of a fifth embodiment of an acetabular cup for acetabular surgery according to the utility model;

[0038] Fig.11 It is a front structural cross-sectional view of Example 6 of an acetabular cup for acetabular surgery of the utility model;

[0039] Fig.12 It is a structural schematic diagram of Example 6 of an acetabular cup for acetabular surgery according to the utility model;

[0040] Fig.13 It is a front structural cross-sectional view of Example 7 of an acetabular cup for acetabular surgery according to the utility model;

[0041] Fig.14 It is a structural schematic diagram of a seventh embodiment of an acetabular cup for acetabular surgery according to the utility model;

[0042] Fig.15 It is a front structural cross-sectional view of Example 8 of an acetabular cup for acetabular surgery of the utility model;

[0043] Fig.16 It is a structural schematic diagram of an acetabular cup embodiment 8 for acetabular surgery according to the utility model;

[0044] Fig.17 It is an exploded view of Example 3 of an acetabular cup for acetabular surgery of the utility model;

[0045] Fig.18 This is a schematic diagram of the connection structure between the first acetabular cup and the acetabular cup pad of Example 3 of the utility model for acetabular surgery.

[0046] In the figure:

[0047] 1. first acetabular cup; 11. first internally threaded base hole;

[0048] 2. second acetabular cup; 21. second internally threaded base hole;

[0049] 3. Acetabular cup pad; 31. Middle internal thread base hole. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0052] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0053] See also Figure 1-18 The utility model 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] A plurality of first internally threaded base holes 11 are formed through the first acetabular cup 1 .

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

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

[0057] A plurality of groups of second internally threaded base holes 21 are formed through the second acetabular cup 2 .

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

[0059] The inner diameter length of the second internal thread base hole 21 is 300 um. Specifically, the arrangement of the first internal thread base hole 11 and the second internal thread base hole 21 facilitates 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 middle internal thread base hole 31 is formed through the acetabular cup pad 3 .

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

[0062] The acetabular cup pad 3 is a trabecular structure, the outer surface of the acetabular cup pad 3 is matched with the inner wall surface of the first acetabular cup 1, and the acetabular cup pad 3 is concave on the side close to the second acetabular cup 2. Specifically, this can increase the contact area between the first acetabular cup 1 and the acetabular cup pad 3, and reduce 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 can increase the friction coefficient of the first acetabular cup 1, the second acetabular cup 2 and the acetabular cup pad 3, reduce the sliding and wear between the first acetabular cup 1, the second acetabular cup 2 and the acetabular cup pad 3, and improve the wear resistance and stability of the acetabular cup.

[0064] The first acetabular cup 1 and the second acetabular cup 2 are rotated so that the first internally threaded base hole 11 and the second internally threaded base hole 21 correspond to the positions of the middle internally threaded base hole 31. Specifically, by setting a plurality of groups of first internally threaded base holes 11 and a plurality of groups of second internally threaded base holes 21, the first acetabular cup 1 and the second acetabular cup 2 can be adjusted in multiple positions, and the acetabular cups can be accurately positioned and tightly connected, which effectively improves 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, according to actual use requirements, the first acetabular cup 1, the second acetabular cup 2, and the acetabular cup pad 3 can be manufactured to corresponding specifications through a laser cladding process.

[0067] Example 1

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

[0069] Example 2

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

[0071] Example 3

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

[0073] Example 4

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

[0075] Example 5

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

[0077] Example 6

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

[0079] Example 7

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

[0081] Example 8

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

[0083] Test example

[0084] In order 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 acetabular cup is subjected to static load test and fatigue test according to the method specified in the international standard ISO 7206-4:2010 to measure the static strength and fatigue life of the acetabular cup respectively.

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

[0087] 3. Wear resistance test of acetabular cup: The acetabular cup is subjected to simulated joint motion test using the method specified in the international standard ISO 14242-1:2012, simulating the load and motion conditions of the artificial hip joint, and measuring indicators such as the wear amount and wear rate of the acetabular cup.

[0088] Physical and chemical indicators:

[0089] According to the above detection method, the physical and chemical indicators of the acetabular cups of different embodiments were measured and counted, and the results are shown in the following table.

[0090]

[0091] According to the above physical and chemical 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 terms of conclusion, the acetabular cups of different embodiments have different combinations of inner diameter length and outer diameter length, which is mainly to adapt to the size and shape of the hip joints of different patients and improve the adaptability and comfort of the acetabular cup. In addition, the difference in the inner diameter length of the first acetabular cup 1 and the second acetabular cup 2 has a certain influence on the physical and chemical indicators 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, so it is necessary to weigh and choose between these two aspects.

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

Claims

1. An acetabular cup for acetabular surgery, characterized in that: It comprises a first acetabular cup (1), a second acetabular cup (2) and an acetabular cup pad (3); The first acetabular cup (1) is provided with a plurality of groups of first internally threaded base holes (11); The second acetabular cup (2) is provided with a plurality of groups of second internally threaded base holes (21); The acetabular cup pad (3) is connected between the first acetabular cup (1) and the second acetabular cup (2), and a middle internal thread base hole (31) is provided through the acetabular cup pad (3).

2. An acetabular cup for acetabular surgery according to claim 1, characterized in that: The first acetabular cup (1) is a trabecular bone structure, the first acetabular cup (1) is a hemispherical hollow 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 length of the first internal thread base hole (11) is 300 um.

4. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The second acetabular cup (2) is a trabecular bone structure, the second acetabular cup (2) is a hemispherical hollow 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 length of the second internal thread base hole (21) is 300 um.

6. The acetabular cup for acetabular surgery according to claim 1, characterized in that: The acetabular cup pad (3) is a trabecular bone structure, the outer surface of the acetabular cup pad (3) is matched with the inner wall surface of the first acetabular cup (1), and the side of the acetabular cup pad (3) close to 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) respectively.

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