A bionic acetabular prosthesis with combined wings

Abstract

A bionic modular winged acetabular prosthesis relates to the technical field of medical devices, comprising an acetabular cup, an iliac wing ramus, a pubic wing ramus and an ischial wing ramus; the acetabular cup is 3D printed in one piece and is in a hollow hemispherical shape; a plurality of acetabular cup locking screw holes are equidistantly arranged on the circumference of the side surface of the edge of the acetabular cup mouth; according to the natural anatomy and mechanical conduction characteristics of the hip joint, the iliac wing ramus is fixedly arranged on the acetabular cup in the direction of the ilium, the pubic wing ramus is fixedly arranged on the acetabular cup in the direction of the pubis, and the ischial wing ramus is fixedly arranged on the acetabular cup in the direction of the ischium; the present invention has wide versatility and does not require special customization according to the patient's condition, thereby reducing the individual customization time and individual production cost of the prosthesis; the external structure of the modular wing ramus is designed based on the anatomical structure of the bone surface of the outer wall of the acetabulum and the natural mechanical structure of the human hip joint, thereby improving the initial stability, being able to quickly and accurately complete hip joint reconstruction, improving the surgical efficiency, and promoting bone integration and functional recovery after surgery.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a bionic modular acetabular prosthesis. Background Art

[0002] In recent years, the number of hip revision surgeries has been increasing, and reconstruction of acetabular bone defects is a challenge faced by joint surgeons. For more severe bone defects, cup-cage structures and custom triflanged acetabulars are often used for reconstruction in clinical practice. The cup-cage structure protects the acetabular cup from mechanical forces by bridging the ilium and ischium through the cage (anti-protrusion cage) and promotes the biological integration of the acetabular cup. However, the cage may not match the patient's ilium and ischium. In addition, it ignores the reconstruction of the pubic direction and cannot restore the natural mechanical structure of the hip joint. Custom triflanged cups can provide individualized treatment according to the acetabular bone defect, thereby covering the discontinuous part of the pelvis and reconstructing the anatomical acetabular center and mechanical structure. However, the customized triflanged cup may still be partially mismatched with the bone surface, and it needs to be customized individually. There is currently no unified production standard and specification, and the preoperative production cycle is long and expensive. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the cup-cage structure and the customized wing cup in the reconstruction of the existing acetabular bone defect, and to provide a bionic modular wing acetabular prosthesis.

[0004] The approximate direction of the assembled wing in the plane of the acetabular cup is determined according to the natural mechanical structure of the hip joint. Through anatomical morphological measurement, it is found that the angle relationship between the three wings of different patients is quite different. The modular design allows the adjustment and optimization of the placement angles of the three wings according to the patient's hip joint conditions during surgery to restore the natural mechanical structure of the hip joint. According to the angle relationship between the inner wall of the acetabulum and the assembled wing branch, modular design and standardized production are carried out on this basis, making the prosthesis widely versatile. The corresponding pre-produced prosthesis component model can be conveniently selected during surgery, without the need for special customization for the patient's condition, reducing the individual customization time and production cost of the prosthesis. At the same time, the anatomical morphology of the outer wall of the natural acetabulum is simulated through bionic anatomy, the shape and structure of the wing are optimized, the contact area between the prosthesis and the outer wall of the acetabulum is increased, and the initial stability is improved. The microporous structure is added to the design to promote interface bone integration and stimulate bone ingrowth to provide long-term stability of the prosthesis.

[0005] A bionic combined wing acetabular prosthesis, comprising an acetabular cup, an iliac wing ramus, a pubic wing ramus and a sciatic wing ramus;

[0006] The acetabular cup is in the shape of a hollow hemisphere, and a plurality of acetabular cup locking nail holes are equidistantly provided on the side circumference of the cup edge of the acetabular cup.

[0007] According to the natural anatomy and mechanical structure of the hip joint, the iliac wing branch is fixedly mounted on the acetabular cup toward the ilium, the pubic wing branch is fixedly mounted on the acetabular cup toward the pubis, and the ischial wing branch is fixedly mounted on the acetabular cup toward the ischium;

[0008] The iliac wing ramus bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum in the direction of the ilium, including the iliac wing ramus arc surface fitted with the acetabular cup and the iliac wing ramus wing surface fitted with the ilium bone surface; the curvature of the iliac wing ramus arc surface is the same as the curvature of the edge of the acetabular cup body, and the iliac wing ramus can slide arbitrarily on the edge of the acetabular cup body; the iliac wing ramus arc surface locking nail holes with the same spacing as the acetabular cup are opened on the iliac wing ramus arc surface, and the locking screw passes through the iliac wing ramus arc surface locking nail holes and the acetabular cup locking nail holes to connect and fix the iliac wing ramus to the acetabular cup; the iliac wing ramus wing surface locking nail holes are opened on the iliac wing ramus wing surface, and the locking screw passes through the iliac wing ramus wing surface locking nail holes to fix the iliac wing ramus wing surface to the ilium; the angle between the iliac wing ramus and the inner wall of the acetabular cup is 30°~45°;

[0009] The pubic wing ramus bionic simulates the anatomical morphology of the outer wall bone surface in the direction of the pubic bone of the natural acetabulum, including the pubic wing ramus arc surface fitted with the acetabular cup and the pubic wing ramus wing surface fitted with the pubic bone surface; the curvature of the pubic wing ramus arc surface is the same as the curvature of the edge of the acetabular cup body, and the pubic wing ramus can slide arbitrarily on the edge of the acetabular cup body; the pubic wing ramus arc surface locking nail holes with the same spacing as the acetabular cup are opened on the pubic wing ramus arc surface, and the locking screw passes through the pubic wing ramus arc surface locking nail holes and the acetabular cup locking nail holes to connect and fix the pubic wing ramus to the acetabular cup; the pubic wing ramus wing surface locking nail holes are opened on the pubic wing ramus wing surface, and the locking screw passes through the pubic wing ramus wing surface locking nail holes to fix the pubic wing ramus wing surface to the pubis; the angle between the pubic wing ramus and the inner wall of the acetabular cup is 75°~90°;

[0010] The ischial wing ramus bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum in the direction of the ischium, including an ischial wing ramus arc surface fitted with the acetabular cup and an ischial wing ramus wing surface fitted with the ischium bone surface; the curvature of the ischial wing ramus arc surface is the same as the curvature of the edge of the acetabular cup body, and the ischial wing ramus can slide arbitrarily on the edge of the acetabular cup body; the ischial wing ramus arc surface locking screw holes with the same spacing as the acetabular cup are opened on the ischial wing ramus arc surface, and the locking screw passes through the ischial wing ramus arc surface locking screw holes and the acetabular cup locking screw holes to connect and fix the ischial wing ramus to the acetabular cup; the ischial wing ramus wing surface locking screw holes are opened on the ischial wing ramus wing surface, and the locking screw passes through the ischial wing ramus wing surface locking screw holes to fix the ischial wing ramus wing surface to the ischium; the angle between the ischial wing ramus and the inner wall of the acetabular cup is 105°~120°;

[0011] The outer surface of the acetabular cup is provided with interface micropores.

[0012] The surfaces of the iliac wing ramus, the pubic wing ramus and the ischial wing ramus are all provided with interface micropores.

[0013] The interface microporous structure of the outer surface of the acetabular cup is a bcc structure, a body-centered cubic structure, a diamond structure or a Thiessen polygon structure.

[0014] The interface micropores on the surface of the iliac wing branch, the interface micropores on the surface of the pubic wing branch and the interface micropores on the surface of the ischial wing branch are bcc structures, body-centered cubic structures, diamond structures or Thiessen polygon structures.

[0015] The acetabular cup locking nail holes are arranged in two rows.

[0016] The acetabular cup is produced by 3D integrated printing.

[0017] Working process and working principle of the present invention:

[0018] The main load-bearing directions of the acetabulum are respectively toward the ilium, toward the pubis, and toward the ischium. According to the natural mechanical structure of the hip joint, the three assembled wing branches of the present invention are designed as the iliac wing branch toward the ilium, the pubic wing branch toward the pubis, and the ischial wing branch toward the ischium. The present invention reconstructs the structure and function of the hip joint based on the bionic design of the anatomical structure of the bone surface of the outer wall of the acetabulum and the natural mechanical structure of the human hip joint, and designs the external structure of the three assembled wing branches on this basis to make it fit the bone surface as closely as possible. The present invention clarifies the angle relationship between the three assembled wing branches and the acetabular cup through anatomical morphological measurement, and classifies them, and conducts modular design and standardized production on this basis, so that the prosthesis has wide versatility.

[0019] The three types of assembled pterygoid branches can be selected according to the patient's pelvic condition; the curvature of the iliac pterygoid branch arc surface is the same as the curvature of the edge of the acetabular cup body, and the iliac pterygoid branch can slide arbitrarily on the edge of the acetabular cup body; the iliac pterygoid branch arc surface locking screw holes with the same spacing as the acetabular cup are opened on the iliac pterygoid branch arc surface, and the locking screw passes through the iliac pterygoid branch arc surface locking screw holes and the acetabular cup locking screw holes to connect and fix the iliac pterygoid branch to the acetabular cup, and the iliac pterygoid branch wing surface locking screw holes are opened on the iliac pterygoid branch wing surface The locking screw passes through the locking screw hole on the wing surface of the iliac wing branch to fix the wing surface of the iliac wing branch to the ilium; the curvature of the arc surface of the pubic wing branch is the same as the curvature of the edge of the acetabular cup body, and the pubic wing branch can slide arbitrarily on the edge of the acetabular cup body; the arc surface of the pubic wing branch is provided with a pubic wing branch arc surface locking screw hole with the same spacing as the acetabular cup, and the locking screw passes through the locking screw hole on the arc surface of the pubic wing branch and the locking screw hole of the acetabular cup to connect and fix the pubic wing branch to the acetabular cup; the pubic wing branch surface is A locking screw hole is provided on the wing surface of the pubic wing ramus, and a locking screw passes through the locking screw hole on the wing surface of the pubic wing ramus to fix the wing surface of the pubic wing ramus to the pubis; the curvature of the arc surface of the ischial wing ramus is the same as the curvature of the edge of the cup body of the acetabular cup, and the ischial wing ramus can slide arbitrarily on the edge of the cup body of the acetabular cup; the arc surface of the ischial wing ramus is provided with an ischial wing ramus arc surface locking screw hole with the same spacing as the acetabular cup, and a locking screw passes through the locking screw hole on the arc surface of the ischial wing ramus and the locking screw hole of the acetabular cup to connect the ischial wing ramus to the acetabular cup The wing surface of the ischial wing is provided with a locking screw hole, and the locking screw passes through the locking screw hole of the ischial wing surface to fix the wing surface of the ischial wing to the ischium; the three assembled wing branches are fitted to the edge of the acetabular cup through the arc surface and can slide continuously along the edge of the acetabular cup, and the locking screw passes through the locking screw hole to fix the assembled wing branch to the acetabular cup, and the wing surface of the assembled wing branch and the bone surface of the outer wall of the acetabulum are fixed by the locking screw, so as to realize the initial fixation of the prosthesis and the pelvis.

[0020] The outer surface of the acetabular cup, the iliac wing ramus, the pubic wing ramus and the ischial wing ramus can be provided with microporous structures to facilitate the later bone integration and achieve biological long-term fixation.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention classifies three types of assembled pterygoid branches according to the angle relationship between the inner wall of the acetabulum and the outer wall of the acetabulum in the corresponding direction, and conducts modular design and standardized production based on this, so that the prosthesis has wide versatility and the corresponding pre-prosthesis component model can be conveniently selected during surgery without special customization according to the patient's condition, thereby reducing the individual customization time and production cost of the prosthesis.

[0023] 2. The present invention provides a plurality of acetabular cup locking pins equidistantly on the circumference of the hemispherical edge side of the acetabular cup. The three assembled wing branches can slide continuously along the edge of the acetabular cup. The direction of each assembled wing branch in the plane of the acetabular cup mouth can be adjusted by sliding the three assembled wing branches to restore the natural anatomical and mechanical structure of the hip joint.

[0024] 3. The present invention reconstructs the structure and function of the hip joint based on the bionic design of the anatomical structure of the outer wall of the acetabulum and the natural mechanical structure of the human hip joint, and designs the external structure of the assembled pterygoid ramus on this basis to make it fit the bone surface as closely as possible, increase the contact area between the prosthesis and the acetabulum bone, and improve the initial stability.

[0025] 4. The present invention has a perfect reconstruction theory and a complete reconstruction process, which can quickly and accurately complete hip joint reconstruction, improve surgical efficiency, and promote bone integration and functional recovery after surgery, providing patients with better treatment effects and accelerating patients' postoperative recovery.

[0026] 5. Compared with customized wing cups, the present invention greatly reduces the time cost of patients. The preoperative production cycle of customized wing cups is long, and it often takes a lot of time from obtaining patient data, design to production completion, which may delay the patient's treatment. The present invention uses a modular universal wing cup, which can pre-produce components of various specifications and combine them on-site according to the actual situation of the patient before surgery. There is no need for a long customization waiting process, which allows patients to receive surgical treatment faster.

[0027] 6. In terms of resource costs, each customized wing cup needs to be customized individually, from design, material preparation to production, it must be carried out for specific patients, consuming a lot of manpower, material and material resources. Moreover, due to the lack of unified standards and specifications, each customization process needs to be explored and tried again, further increasing costs. The present invention adopts a modular universal wing cup, which is produced through standardized components to achieve efficient use of resources. The production process can be scaled, reducing the cost of a single component, while reducing the waste of resources caused by individual customization, effectively controlling medical costs, and benefiting more patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of embodiments 1 to 3 of the present invention.

[0029] Figure 2 It is a front view of Examples 1 to 3 of the present invention.

[0030] Figure 3 It is a three-dimensional schematic diagram of the acetabular cup according to Embodiment 1 to Embodiment 3 of the present invention.

[0031] Figure 4 It is a three-dimensional schematic diagram of the iliac wing branch of Examples 1 to 3 of the present invention.

[0032] Figure 5 It is a three-dimensional schematic diagram of the pubic wing branch of Examples 1 to 3 of the present invention.

[0033] Figure 6It is a three-dimensional schematic diagram of the ischial wing ramus of Examples 1 to 3 of the present invention.

[0034] Figure 7 Schematic diagram of the use of Examples 1 to 3 of the present invention.

[0035] Figure 8 It is a front view of embodiment 4 of the present invention.

[0036] Fig. 9 It is a three-dimensional schematic diagram of the acetabular cup according to embodiment 4 of the present invention.

[0037] Fig.10 It is a three-dimensional schematic diagram of the iliac wing branch of Example 4 of the present invention.

[0038] Fig.11 It is a three-dimensional schematic diagram of the pubic wing branch of Example 4 of the present invention.

[0039] Fig.12 It is a three-dimensional schematic diagram of the ischial wing ramus of Example 4 of the present invention.

[0040] Fig.13 This is a schematic diagram of the use of Example 4 of the present invention. DETAILED DESCRIPTION

[0041] See also Figures 1 to 7 Shown are embodiments 1 to 3 of the present invention;

[0042] See also Figures 8 to 13 Shown is Example 4 of the present invention. Example 1

[0043] A bionic combined wing acetabular prosthesis, comprising an acetabular cup 1, an iliac wing ramus 2, a pubic wing ramus 3 and a sciatic wing ramus 4;

[0044] The acetabular cup 1 is in a hollow hemispherical shape, and 24 acetabular cup locking nail holes 11 are equidistantly provided on the side circumference of the cup edge of the acetabular cup 1;

[0045] According to the natural anatomy and mechanical structure of the hip joint, the iliac wing ramus 2 is fixedly mounted on the acetabular cup 1 toward the ilium 5, the pubic wing ramus 3 is fixedly mounted on the acetabular cup 1 toward the pubis 6, and the ischial wing ramus 4 is fixedly mounted on the acetabular cup 1 toward the ischium 7;

[0046] The iliac wing ramus 2 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum ilium 5, including an iliac wing ramus arc surface 21 fitted with the acetabular cup 1 and an iliac wing ramus wing surface 22 fitted with the bone surface of the ilium 5; the curvature of the iliac wing ramus arc surface 21 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the iliac wing ramus 2 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the iliac wing ramus arc surface locking nail hole 23 with the same spacing as the acetabular cup 1 is opened on the iliac wing ramus arc surface 21, and the locking screw passes through the iliac wing ramus arc surface locking nail hole 23 and the acetabular cup locking nail hole 11 to connect and fix the iliac wing ramus 2 to the acetabular cup 1; the iliac wing ramus wing surface locking nail hole 24 is opened on the iliac wing ramus wing surface, and the locking screw passes through the iliac wing ramus wing surface locking nail hole 24 to fix the iliac wing ramus wing surface 22 to the ilium 5; the angle between the iliac wing ramus 2 and the inner wall of the acetabular cup 1 is 30°;

[0047] The pubic wing ramus 3 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum pubis 6, including a pubic wing ramus arc surface 31 fitted with the acetabular cup 1 and a pubic wing ramus wing surface 32 fitted with the pubic bone surface 6; the curvature of the pubic wing ramus arc surface 31 is the same as the curvature of the edge of the acetabular cup 1, and the pubic wing ramus 3 can slide arbitrarily on the edge of the acetabular cup 1; the pubic wing ramus arc surface locking nail hole 33 with the same spacing as the acetabular cup 1 is opened on the pubic wing ramus arc surface 31, and the locking screw passes through the pubic wing ramus arc surface locking nail hole 33 and the acetabular cup locking nail hole 11 to connect and fix the pubic wing ramus 3 to the acetabular cup 1; the pubic wing ramus wing surface locking nail hole 34 is opened on the pubic wing ramus wing surface, and the locking screw passes through the pubic wing ramus wing surface locking nail hole 34 to fix the pubic wing ramus wing surface 32 to the pubis 6; the angle between the pubic wing ramus 3 and the inner wall of the acetabular cup 1 is 75°;

[0048] The ischial wing ramus 4 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum 7, including an ischial wing ramus arc surface 41 fitted with the acetabular cup 1 and an ischial wing ramus wing surface 42 fitted with the ischium 7 bone surface; the curvature of the ischial wing ramus arc surface 41 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the ischial wing ramus 4 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the ischial wing ramus arc surface locking nail holes 43 with the same spacing as the acetabular cup 1 are opened on the ischial wing ramus arc surface 41, and the locking screw passes through the ischial wing ramus arc surface locking nail holes 43 and the acetabular cup locking nail holes 11 to connect and fix the ischial wing ramus 4 to the acetabular cup 1; the ischial wing ramus wing surface locking nail holes 44 are opened on the ischial wing ramus wing surface, and the locking screw passes through the ischial wing ramus wing surface locking nail holes 44 to fix the ischial wing ramus wing surface 42 to the ischium 7; the angle between the ischial wing ramus 4 and the inner wall of the acetabular cup 1 is 105°;

[0049] The interface microporous structure of the outer surface of the acetabular cup 1 is a body-centered cubic structure.

[0050] The interface microporous structure on the surface of the iliac wing ramus 2 is a body-centered cubic structure.

[0051] The interface microporous structure on the surface of the pubic wing ramus 3 is a body-centered cubic structure.

[0052] The interface microporous structure on the surface of the ischial wing ramus 4 is a body-centered cubic structure. Example 2

[0053] A bionic winged acetabular prosthesis comprises an acetabular cup 1, an iliac wing ramus 2, a pubic wing ramus 3 and an ischial wing ramus 4;

[0054] The acetabular cup 1 is in a hollow hemispherical shape, and 24 acetabular cup locking nail holes 11 are evenly spaced on the side circumference of the cup edge of the acetabular cup 1;

[0055] According to the natural anatomy and mechanical structure of the hip joint, the iliac wing ramus 2 is fixedly mounted on the acetabular cup 1 toward the ilium 5, the pubic wing ramus 3 is fixedly mounted on the acetabular cup 1 toward the pubis 6, and the ischial wing ramus 4 is fixedly mounted on the acetabular cup 1 toward the ischium 7;

[0056] The iliac wing ramus 2 bionic simulates the anatomical morphology of the outer wall bone surface in the direction of the ilium of the natural acetabulum, including an iliac wing ramus arc surface 21 fitted with the acetabular cup 1 and an iliac wing ramus wing surface 22 fitted with the bone surface of the ilium 5; the curvature of the iliac wing ramus arc surface 21 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the iliac wing ramus 2 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the iliac wing ramus arc surface locking nail hole 23 with the same spacing as the acetabular cup 1 is opened on the iliac wing ramus arc surface 21, and the locking screw passes through the iliac wing ramus arc surface locking nail hole 23 and the acetabular cup locking nail hole 11 to connect and fix the iliac wing ramus 2 to the acetabular cup 1; the iliac wing ramus wing surface locking nail hole 24 is opened on the iliac wing ramus wing surface, and the locking screw passes through the iliac wing ramus wing surface locking nail hole 24 to fix the iliac wing ramus wing surface 22 to the ilium 5; the angle between the iliac wing ramus 2 and the inner wall of the acetabular cup 1 is 35°;

[0057] The pubic wing ramus 3 bionic simulates the anatomical morphology of the outer wall bone surface in the pubic direction of the natural acetabulum, including a pubic wing ramus arc surface 31 fitted with the acetabular cup 1 and a pubic wing ramus wing surface 32 fitted with the bone surface of the pubic bone 6; the curvature of the pubic wing ramus arc surface 31 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the pubic wing ramus 3 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; a pubic wing ramus arc surface locking nail hole 33 with the same spacing as the acetabular cup 1 is opened on the pubic wing ramus arc surface 31, and the locking screw passes through the pubic wing ramus arc surface locking nail hole 33 and the acetabular cup locking nail hole 11 to connect and fix the pubic wing ramus 3 to the acetabular cup 1; a pubic wing ramus wing surface locking nail hole 34 is opened on the pubic wing ramus wing surface, and the locking screw passes through the pubic wing ramus wing surface locking nail hole 34 to fix the pubic wing ramus wing surface 32 to the pubis 6; the angle between the pubic wing ramus 3 and the inner wall of the acetabular cup 1 is 85°;

[0058] The ischial wing ramus 4 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum in the direction of the ischium, including an ischial wing ramus arc surface 41 that fits with the acetabular cup 1 and an ischial wing ramus wing surface 42 that fits with the ischium 7 bone surface; the curvature of the ischial wing ramus arc surface 41 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the ischial wing ramus 4 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the ischial wing ramus arc surface locking nail holes 43 with the same spacing as the acetabular cup 1 are opened on the ischial wing ramus arc surface 41, and the locking screw passes through the ischial wing ramus arc surface locking nail holes 43 and the acetabular cup locking nail holes 11 to connect and fix the ischial wing ramus 4 to the acetabular cup 1; the ischial wing ramus wing surface locking nail holes 44 are opened on the ischial wing ramus wing surface, and the locking screw passes through the ischial wing ramus wing surface locking nail holes 44 to fix the ischial wing ramus wing surface 42 to the ischium 7; the angle between the ischial wing ramus 4 and the inner wall of the acetabular cup 1 is 115°;

[0059] The interface microporous structure on the outer surface of the acetabular cup 1 is a diamond structure.

[0060] The interface microporous structure on the surface of the iliac wing branch 2 is a diamond structure.

[0061] The interface microporous structure on the surface of the pubic wing ramus 3 is a diamond structure.

[0062] The interface microporous structure on the surface of the ischial wing ramus 4 is a diamond structure. Example 3

[0063] A bionic combined wing acetabular prosthesis, comprising an acetabular cup 1, an iliac wing ramus 2, a pubic wing ramus 3 and a sciatic wing ramus 4;

[0064] The acetabular cup 1 is in a hollow hemispherical shape, and 24 acetabular cup locking nail holes 11 are equidistantly provided on the side circumference of the cup edge of the acetabular cup 1;

[0065] According to the natural anatomy and mechanical structure of the hip joint, the iliac wing ramus 2 is fixedly mounted on the acetabular cup 1 toward the ilium 5, the pubic wing ramus 3 is fixedly mounted on the acetabular cup 1 toward the pubis 6, and the ischial wing ramus 4 is fixedly mounted on the acetabular cup 1 toward the ischium 7;

[0066] The iliac wing ramus 2 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum in the direction of the ilium, including an iliac wing ramus arc surface 21 fitted with the acetabular cup 1 and an iliac wing ramus wing surface 22 fitted with the bone surface of the ilium 5; the curvature of the iliac wing ramus arc surface 21 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the iliac wing ramus 2 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the iliac wing ramus arc surface locking nail hole 23 with the same spacing as the acetabular cup 1 is opened on the iliac wing ramus arc surface 21, and the locking screw passes through the iliac wing ramus arc surface locking nail hole 23 and the acetabular cup locking nail hole 11 to connect and fix the iliac wing ramus 2 to the acetabular cup 1; the iliac wing ramus wing surface locking nail hole 24 is opened on the iliac wing ramus wing surface, and the locking screw passes through the iliac wing ramus wing surface locking nail hole 24 to fix the iliac wing ramus wing surface 22 to the ilium 5; the angle between the iliac wing ramus 2 and the inner wall of the acetabular cup 1 is 45°;

[0067] The pubic wing ramus 3 bionic simulates the anatomical morphology of the outer wall bone surface in the pubic direction of the natural acetabulum, including a pubic wing ramus arc surface 31 fitted with the acetabular cup 1 and a pubic wing ramus wing surface 32 fitted with the pubic bone surface 6; the curvature of the pubic wing ramus arc surface 31 is the same as the curvature of the edge of the acetabular cup 1, and the pubic wing ramus 3 can slide arbitrarily on the edge of the acetabular cup 1; the pubic wing ramus arc surface locking nail hole 33 with the same spacing as the acetabular cup 1 is opened on the pubic wing ramus arc surface 31, and the locking screw passes through the pubic wing ramus arc surface locking nail hole 33 and the acetabular cup locking nail hole 11 to connect and fix the pubic wing ramus 3 to the acetabular cup 1; the pubic wing ramus wing surface locking nail hole 34 is opened on the pubic wing ramus wing surface, and the locking screw passes through the pubic wing ramus wing surface locking nail hole 34 to fix the pubic wing ramus wing surface 32 to the pubis 6; the angle between the pubic wing ramus 3 and the inner wall of the acetabular cup 1 is 90°;

[0068] The ischial wing ramus 4 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum in the direction of the ischium, including an ischial wing ramus arc surface 41 that fits with the acetabular cup 1 and an ischial wing ramus wing surface 42 that fits with the ischium 7 bone surface; the curvature of the ischial wing ramus arc surface 41 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the ischial wing ramus 4 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the ischial wing ramus arc surface locking nail holes 43 with the same spacing as the acetabular cup 1 are opened on the ischial wing ramus arc surface 41, and the locking screw passes through the ischial wing ramus arc surface locking nail holes 43 and the acetabular cup locking nail holes 11 to connect and fix the ischial wing ramus 4 to the acetabular cup 1; the ischial wing ramus wing surface locking nail holes 44 are opened on the ischial wing ramus wing surface, and the locking screw passes through the ischial wing ramus wing surface locking nail holes 44 to fix the ischial wing ramus wing surface 42 to the ischium 7; the angle between the ischial wing ramus 4 and the inner wall of the acetabular cup 1 is 120°;

[0069] The interface microporous structure on the outer surface of the acetabular cup 1 is a Thiessen polygon structure.

[0070] The interface microporous structure on the surface of the iliac wing branch 2 is a Thiessen polygon structure.

[0071] The interface microporous structure on the surface of the pubic wing ramus 3 is a Thiessen polygon structure.

[0072] The interface microporous structure on the surface of the ischial wing ramus 4 is a Thiessen polygon structure. Example 4

[0073] A bionic winged acetabular prosthesis comprises an acetabular cup 1, an iliac wing ramus 2, a pubic wing ramus 3 and an ischial wing ramus 4;

[0074] The acetabular cup 1 is in a hollow hemispherical shape, and two rows of acetabular cup locking nail holes 11 are arranged on the side circumference of the cup edge of the acetabular cup 1, and each row of acetabular cup locking nail holes 11 is 15 and arranged equidistantly;

[0075] According to the natural anatomy and mechanical structure of the hip joint, the iliac wing ramus 2 is fixedly mounted on the acetabular cup 1 toward the ilium 5, the pubic wing ramus 3 is fixedly mounted on the acetabular cup 1 toward the pubis 6, and the ischial wing ramus 4 is fixedly mounted on the acetabular cup 1 toward the ischium 7;

[0076] The iliac wing ramus 2 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum ilium 5, including an iliac wing ramus arc surface 21 fitted with the acetabular cup 1 and an iliac wing ramus wing surface 22 fitted with the bone surface of the ilium 5; the curvature of the iliac wing ramus arc surface 21 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the iliac wing ramus 2 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the iliac wing ramus arc surface locking nail hole 23 with the same spacing as the acetabular cup 1 is opened on the iliac wing ramus arc surface 21, and the locking screw passes through the iliac wing ramus arc surface locking nail hole 23 and the acetabular cup locking nail hole 11 to connect and fix the iliac wing ramus 2 to the acetabular cup 1; the iliac wing ramus wing surface locking nail hole 24 is opened on the iliac wing ramus wing surface, and the locking screw passes through the iliac wing ramus wing surface locking nail hole 24 to fix the iliac wing ramus wing surface 22 to the ilium 5; the angle between the iliac wing ramus 2 and the inner wall of the acetabular cup 1 is 30°;

[0077] The pubic wing ramus 3 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum pubis 6, including a pubic wing ramus arc surface 31 fitted with the acetabular cup 1 and a pubic wing ramus wing surface 32 fitted with the pubic bone surface 6; the curvature of the pubic wing ramus arc surface 31 is the same as the curvature of the edge of the acetabular cup 1, and the pubic wing ramus 3 can slide arbitrarily on the edge of the acetabular cup 1; the pubic wing ramus arc surface locking nail hole 33 with the same spacing as the acetabular cup 1 is opened on the pubic wing ramus arc surface 31, and the locking screw passes through the pubic wing ramus arc surface locking nail hole 33 and the acetabular cup locking nail hole 11 to connect and fix the pubic wing ramus 3 to the acetabular cup 1; the pubic wing ramus wing surface locking nail hole 34 is opened on the pubic wing ramus wing surface, and the locking screw passes through the pubic wing ramus wing surface locking nail hole 34 to fix the pubic wing ramus wing surface 32 to the pubis 6; the angle between the pubic wing ramus 3 and the inner wall of the acetabular cup 1 is 75°;

[0078] The ischial wing ramus 4 bionic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum 7, including an ischial wing ramus arc surface 41 fitted with the acetabular cup 1 and an ischial wing ramus wing surface 42 fitted with the ischium 7 bone surface; the curvature of the ischial wing ramus arc surface 41 is the same as the curvature of the edge of the cup body of the acetabular cup 1, and the ischial wing ramus 4 can slide arbitrarily on the edge of the cup body of the acetabular cup 1; the ischial wing ramus arc surface locking nail holes 43 with the same spacing as the acetabular cup 1 are opened on the ischial wing ramus arc surface 41, and the locking screw passes through the ischial wing ramus arc surface locking nail holes 43 and the acetabular cup locking nail holes 11 to connect and fix the ischial wing ramus 4 to the acetabular cup 1; the ischial wing ramus wing surface locking nail holes 44 are opened on the ischial wing ramus wing surface, and the locking screw passes through the ischial wing ramus wing surface locking nail holes 44 to fix the ischial wing ramus wing surface 42 to the ischium 7; the angle between the ischial wing ramus 4 and the inner wall of the acetabular cup 1 is 105°;

[0079] The interface microporous structure of the outer surface of the acetabular cup 1 is a body-centered cubic structure.

[0080] The interface microporous structure on the surface of the iliac wing ramus 2 is a body-centered cubic structure.

[0081] The interface microporous structure on the surface of the pubic wing ramus 3 is a body-centered cubic structure.

[0082] The interface microporous structure on the surface of the ischial wing ramus 4 is a body-centered cubic structure.

[0083] The working process and working principle of the above-mentioned embodiments 1, 2, 3 and 4 are as follows:

[0084] The main load-bearing directions of the acetabulum are respectively toward the ilium 5, toward the pubis 6, and toward the ischium 7. According to the natural mechanical structure of the hip joint, the three assembled wing branches of the present invention are designed as the iliac wing branch 2 toward the ilium 5, the pubic wing branch 3 toward the pubis 6, and the ischium wing branch 4 toward the ischium 7. The present invention reconstructs the structure and function of the hip joint based on the bionic design of the anatomical structure of the bone surface of the outer wall of the acetabulum and the natural mechanical structure of the human hip joint, and designs the external structure of the three assembled wing branches on this basis to make it fit the bone surface as much as possible. The present invention clarifies the angle relationship between the three assembled wing branches and the acetabular cup 1 through anatomical morphological measurement, and classifies them, and conducts modular design and standardized production on this basis, so that the prosthesis has wide versatility.

[0085] The three types of assembled pterygoid branches can be selected according to the patient's pelvic condition; the curvature of the iliac pterygoid branch arc surface 21 is the same as the curvature of the edge of the acetabular cup 1, and the iliac pterygoid branch 2 can slide arbitrarily on the edge of the acetabular cup 1; the iliac pterygoid branch arc surface locking nail holes 23 with the same spacing as the acetabular cup 1 are opened on the iliac pterygoid branch arc surface 21, and the locking screw passes through the iliac pterygoid branch arc surface locking nail hole 23 and the acetabular cup locking nail hole 11 to connect and fix the iliac pterygoid branch 2 to the acetabular cup 1, and the iliac pterygoid branch wing surface locking nail hole is opened on the iliac pterygoid branch wing surface 22 24, the locking screw passes through the locking screw hole 24 of the iliac wing branch wing surface to fix the iliac wing branch wing surface 22 to the ilium 5; the curvature of the pubic wing branch arc surface 31 is the same as the curvature of the edge of the acetabular cup 1 cup body, and the pubic wing branch 3 can slide arbitrarily on the edge of the acetabular cup 1 cup body; the pubic wing branch arc surface locking screw hole 33 with the same spacing as the acetabular cup is opened on the pubic wing branch arc surface 31, and the locking screw passes through the pubic wing branch arc surface locking screw hole 33 and the acetabular cup locking screw hole 11 to connect and fix the pubic wing branch 3 to the acetabular cup 1; the pubic wing branch wing surface 3 2 is provided with a locking screw hole 34 on the pubic wing ramus surface, and a locking screw passes through the locking screw hole 34 on the pubic wing ramus surface to fix the pubic wing ramus surface 32 with the pubic bone 6; the curvature of the ischial wing ramus arc surface 41 is the same as the curvature of the edge of the acetabular cup 1, and the ischial wing ramus 4 can slide freely on the edge of the acetabular cup 1; the ischial wing ramus arc surface locking screw hole 43 with the same spacing as the acetabular cup is provided on the ischial wing ramus arc surface 41, and the locking screw passes through the ischial wing ramus arc surface locking screw hole 43 and the acetabular cup locking screw hole 11 to fix the ischial wing ramus 4 with the hip The acetabular cup 1 is connected and fixed; an ischial wing ramus wing surface locking nail hole 44 is opened on the ischial wing ramus wing surface 42, and the locking screw passes through the ischial wing ramus wing surface locking nail hole 44 to fix the ischial wing ramus wing surface 42 to the ischium 7; the three assembled wing rams are fitted to the edge of the cup mouth of the acetabular cup 1 through the arc surface and can slide continuously along the edge of the cup mouth of the acetabular cup 1, and the locking screw passes through the locking nail hole to fix the assembled wing ramus to the acetabular cup 1, and the wing surface of the assembled wing ramus and the bone surface of the outer wall of the acetabulum are fixed by the locking screw to achieve the initial fixation of the prosthesis and the pelvis.

[0086] The outer surface of the acetabular cup 1, the iliac wing ramus 2, the pubic wing ramus 3 and the ischial wing ramus 4 are provided with microporous structures to facilitate the later bone integration and achieve biological long-term fixation.

Claims

1. A bionic modular acetabular prosthesis, characterized in that: Includes the acetabular cup (1), iliac wing ramus (2), pubic wing ramus (3), and sciatic wing ramus (4); The acetabular cup (1) is in the shape of a hollow hemispherical body, and a plurality of acetabular cup locking screw holes (11) are equidistantly provided on the side circumference of the cup opening edge of the acetabular cup (1); According to the natural anatomy and mechanical structure of the hip joint, the iliac wing branch (2) is fixedly mounted on the acetabular cup (1) in the direction of the ilium, the pubic wing branch (3) is fixedly mounted on the acetabular cup (1) in the direction of the pubis, and the ischial wing branch (4) is fixedly mounted on the acetabular cup (1) in the direction of the ischium; The iliac wing branch (2) bionic simulates the anatomical morphology of the outer wall bone surface in the direction of the ilium of the natural acetabulum, including an iliac wing branch arc surface (21) that fits the acetabular cup (1) and an iliac wing branch wing surface (22) that fits the ilium bone surface; the curvature of the iliac wing branch arc surface (21) is the same as the curvature of the edge of the acetabular cup (1), and the iliac wing branch (2) can be slidably fixed on the edge of the acetabular cup (1); the iliac wing branch arc surface (21) is provided with an iliac wing having the same spacing as the acetabular cup (1). The iliac wing ramus (2) is provided with an iliac wing ramus surface locking nail hole (23), and the locking screw passes through the iliac wing ramus surface locking nail hole (23) and the acetabular cup locking nail hole (11) to connect and fix the iliac wing ramus (2) to the acetabular cup (1); the iliac wing ramus surface locking nail hole (24) is provided on the iliac wing ramus surface (22), and the locking screw passes through the iliac wing ramus surface locking nail hole (24) to fix and connect the iliac wing ramus surface (22) to the ilium; the angle between the iliac wing ramus (2) and the inner wall of the acetabular cup (1) is 30° to 45°; The pubic wing ramus (3) bionic simulates the anatomical morphology of the outer wall bone surface in the pubic direction of the natural acetabulum, including a pubic wing ramus arc surface (31) that fits the acetabular cup (1) and a pubic wing ramus wing surface (32) that fits the pubic bone surface; the curvature of the pubic wing ramus arc surface (31) is the same as the curvature of the edge of the acetabular cup (1), and the pubic wing ramus (3) can be slidably fixed on the edge of the acetabular cup (1); the pubic wing ramus arc surface (31) is provided with a pubic wing having the same spacing as the acetabular cup (1). The pubic wing ramus (3) is provided with a locking screw hole (33) on the arc surface of the pubic wing ramus, and a locking screw is passed through the locking screw hole (33) on the arc surface of the pubic wing ramus and the locking screw hole (11) on the acetabular cup to connect and fix the pubic wing ramus (3) to the acetabular cup (1); a pubic wing ramus wing surface locking screw hole (34) is provided on the pubic wing ramus wing surface (32), and a locking screw is passed through the locking screw hole (34) on the pubic wing ramus wing surface to fix and connect the pubic wing ramus wing surface (32) to the pubis; the angle between the pubic wing ramus (3) and the inner wall of the acetabular cup (1) is 75° to 90°; The ischial wing ramus (4) biomimetic simulates the anatomical morphology of the outer wall bone surface of the natural acetabulum in the direction of the ischium, including an ischial wing ramus arc surface (41) fitted with the acetabular cup (1) and an ischial wing ramus wing surface (42) fitted with the ischium bone surface; the curvature of the ischial wing ramus arc surface (41) is the same as the curvature of the edge of the acetabular cup (1), and the ischial wing ramus (4) can be slidably fixed on the edge of the acetabular cup (1); the ischial wing ramus arc surface (41) is provided with ischial wing ramus with the same spacing as the acetabular cup (1). The arc surface locking screw hole (43) is passed through the arc surface locking screw hole (43) of the ischial wing ramus and the acetabular cup locking screw hole (11) to connect and fix the ischial wing ramus (4) to the acetabular cup (1); the ischial wing ramus wing surface locking screw hole (44) is opened on the ischial wing ramus wing surface (42); the locking screw passes through the ischial wing ramus wing surface locking screw hole (44) to fix and connect the ischial wing ramus wing surface (42) to the ischium; the angle between the ischial wing ramus (4) and the inner wall of the acetabular cup (1) is 105°~120°.

2. The bionic modular acetabular prosthesis according to claim 1, characterized in that: The outer surface of the acetabular cup (1) is provided with interface micropores.

3. The bionic modular acetabular prosthesis according to claim 1, characterized in that: The surface of the iliac wing ramus (2), the surface of the pubic wing ramus (3) and the surface of the ischial wing ramus (4) are all provided with interface micropores.

4. The bionic modular acetabular prosthesis according to claim 2, characterized in that: The interface microporous structure of the outer surface of the acetabular cup (1) is a bcc structure, a body-centered cubic structure, a diamond structure, or a Thiessen polygon structure.

5. The bionic modular acetabular prosthesis according to claim 3, characterized in that: The interface micropores on the surface of the iliac wing ramus (2), the interface micropores on the surface of the pubic wing ramus (3) and the interface micropores on the surface of the ischial wing ramus (4) are of a BCC structure, a body-centered cubic structure, a diamond structure or a Thiessen polygon structure.

6. The bionic modular acetabular prosthesis according to claim 1, characterized in that: The acetabular cup locking nail holes (13) are arranged in two rows.

7. The bionic modular acetabular prosthesis according to claim 1, characterized in that: The acetabular cup (1) is produced by 3D integrated printing.

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