Pubic symphysis plate

Abstract

The application provides a pubic symphysis plate, and belongs to the technical field of medical devices.The pubic symphysis plate comprises a first wing plate and a second wing plate, the first wing plate has oppositely arranged first and second ends, the second wing plate has oppositely arranged third and fourth ends, the second end of the first wing plate is rotationally connected to the third end of the second wing plate, the first end of the first wing plate extends away from the second wing plate, and the fourth end of the second wing plate extends away from the first wing plate, the pubic symphysis plate further comprises a connecting group, and the connecting group is connected between the first wing plate and the pubic bone and between the second wing plate and the pubic bone, respectively.The first wing plate and the second wing plate of the pubic symphysis plate can rotate relative to the hinge point, simulate the micro-motion characteristics of the normal pubic symphysis of the human body, and make the pelvis disperse the cyclic load through micro-motion in a simple activity scenario, thereby avoiding stress concentration.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a pubic symphysis plate. Background Technology

[0002] The pubic symphysis plate is a fibrocartilaginous disc that connects the left and right pubic symphysis surfaces. It is located in the center of the front of the pelvis and forms the core structure of the pubic symphysis.

[0003] The pubic symphysis plate is mainly used in scenarios such as pubic symphysis separation, pelvic fracture, and pelvic reconstruction. The existing pubic symphysis plate is a strip-shaped plate structure, which is fixed at both ends to the two pubic bones to achieve assisted reduction of the pubic bones.

[0004] The existing pubic symphysis plate is a single-piece structure. After it is fixedly connected to the left and right pubic bones, the two pubic bones become relatively fixed. When the human body bears weight and walks, the circulatory load of the pelvis cannot be buffered by the micro-movement of the pubic symphysis. Stress tends to concentrate at the pubic symphysis plate and the connecting screws between the pubic symphysis plate and the pubic bones, which can easily lead to screw loosening and cortical bone cutting. Furthermore, without micro-movement cushioning, the hip joint and lumbar spine compensate for the stress, making daily activities inconvenient. Prolonged movement can also cause pain in other areas (such as the lumbar spine and hip joint). The limited opening and closing of the pelvis results in poor comfort during daily activities and a noticeable foreign body sensation. Summary of the Invention

[0005] This invention provides a pubic symphysis plate, which aims to solve the technical problem that the existing pubic symphysis plate is a one-piece plate structure, which fixes the two pubic bones relatively after installation, making it impossible to achieve micro-motion buffering, thus affecting daily activities and causing a noticeable foreign body sensation.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a pubic symphysis plate, comprising: The first wing plate has a first end and a second end that are disposed opposite to each other; The second wing plate has a third end and a fourth end that are arranged opposite to each other; Wherein, the second end of the first wing plate and the third end of the second wing plate are rotatably connected, the first end of the first wing plate extends in a direction away from the second wing plate, and the fourth end of the second wing plate extends in a direction away from the first wing plate. The pubic symphysis plate also includes: The connecting assembly is respectively connected between the first wing plate and the pubic bone, and between the second wing plate and the pubic bone.

[0007] In one possible implementation, the third end of the second wing plate is provided with a hinge post, and the second end of the first wing plate is provided with a hinge hole that rotatably engages with the hinge post.

[0008] In one possible implementation, a hinge sleeve is provided at the bottom of the second end of the first wing plate. The hinge sleeve extends in the vertical direction and has an inner cavity corresponding to the hinge hole. The hinge pin extends into the inner cavity and rotates with the hinge sleeve. The hinge sleeve is located in the gap between the two pubic bones.

[0009] In one possible implementation, the bottom end of the hinge post has a beveled surface.

[0010] In one possible implementation, the connection group includes a plurality of screws; In the connecting assembly installed on the first wing plate, the screw closest to the second end is a rivet, and the remaining screws are loose screws; In the connecting assembly installed on the second wing plate, the screw closest to the third end is a rivet, and the remaining screws are loose screws.

[0011] In one possible implementation, all the loose pins in the same connection group may have the same or different lengths.

[0012] In one possible implementation, both the first wing plate and the second wing plate are provided with mounting portions for installing the loose nails; Both the first wing plate and the second wing plate have notches on their sidewalls, and the notches are located between two adjacent mounting parts.

[0013] In one possible implementation, the first wing plate includes a first connecting portion, a second connecting portion, and a third connecting portion arranged sequentially from the second end to the first end, wherein the heights of the first connecting portion, the second connecting portion, and the third connecting portion are the same or decrease sequentially. The second wing plate includes a fourth connecting portion, a fifth connecting portion, and a sixth connecting portion arranged sequentially from the third end to the fourth end, wherein the heights of the fourth connecting portion, the fifth connecting portion, and the sixth connecting portion are the same or decrease sequentially.

[0014] In one possible implementation, the first wing and the second wing are made of pure titanium.

[0015] In one possible implementation, the projected shapes of the first wing and the second wing in the vertical direction are mirror images of each other.

[0016] The solution shown in this application embodiment, compared with the prior art, allows the first and second wing plates to rotate relative to each other around the hinge point, simulating the micro-motion characteristics of the normal pubic symphysis in the human body. This allows the pelvis to disperse cyclic loads through micro-motion in simple activity scenarios, avoiding stress concentration and improving the mechanical adaptability of the pubic symphysis plate. Compared with traditional one-piece fixation plates, this embodiment avoids excessive stress concentration caused by rigid constraints, reduces shear and pull-out forces at the interface between the connection group and the pubic bone, lowers the probability of screw loosening later, and improves fixation reliability. The rotating structure allows slight relative rotation between the pubic bones, avoiding compensatory forces on the hip joint and lumbar spine during activity, reducing postoperative pain in the lower back and hip, and improving patient comfort.

[0017] The first and second wing plates can be finely adjusted synchronously with the physiological movement of the pubic bone, reducing the traction and compression of soft tissues by the rigid plate, minimizing foreign body sensation, expanding the patient's range of daily activities, and facilitating early rehabilitation training. The first and second wing plates are fixed to their respective pubic bones and can independently conform to the anatomical curves of both pubic bones, resulting in better fit, more secure fixation, equal fixation strength on both sides, and improved overall fixation stability. Attached Figure Description

[0018] Figure 1 A three-dimensional structural schematic diagram of the pubic symphysis plate provided in one embodiment of the present invention; Figure 2 This is a schematic diagram of the front view of the pubic symphysis plate according to an embodiment of the present invention; Figure 3 This is a top view of the pubic symphysis plate provided in one embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of the first wing plate used in one embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of the second wing plate used in one embodiment of the present invention; Figure 6 A three-dimensional structural schematic diagram of the pubic symphysis plate provided in another embodiment of the present invention; Figure 7 This is a front view schematic diagram of the pubic symphysis plate provided in another embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 10-First wing plate; 11-Hinged sleeve; 12-First connecting part; 13-Second connecting part; 14-Third connecting part; 20 - Second wing plate; 21 - Hinge column; 22 - Beveled surface; 23 - Fourth connecting part; 24 - Fifth connecting part; 25 - Sixth connecting part; 30 - Connecting assembly; 31 - Leather nail; 32 - Loose nail; 40 - Notch; 41 - Through hole. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0025] Please refer to the following: Figures 1 to 7The pubic symphysis plate provided by the present invention will now be described.

[0026] The pubic symphysis plate includes a first wing plate 10 and a second wing plate 20. The pubis is divided into left and right, and the installation positions of the first wing plate 10 and the second wing plate 20 are not specifically limited. Depending on their specific shape, the first wing plate 10 can be installed on the left pubis and the second wing plate 20 can be installed on the right pubis; or the first wing plate 10 can be installed on the right pubis and the second wing plate 20 can be installed on the left pubis.

[0027] The shape of the first wing plate 10 conforms to its corresponding pubic bone, and the same applies to the second wing plate 20. After installation, the corresponding area between the first wing plate 10 and the pubic bone is the same as the corresponding area between the second wing plate 20 and the pubic bone, thus ensuring that the connection strength between the two pubic bones is the same. Furthermore, the axis of the hinge shaft of the first wing plate 10 and the second wing plate 20 is located at the center position between the two pubic bones. This ensures that the pubic bones on both sides are subjected to uniform force, reduces the risk of screw loosening due to excessive stress on one side, improves the stability and durability of the fixation structure, and adapts to the needs of simple daily physiological activities.

[0028] The first wing plate 10 has a first end and a second end that are arranged opposite to each other; the second wing plate 20 has a third end and a fourth end that are arranged opposite to each other. Both the first wing plate 10 and the second wing plate 20 are strip structures, with the first end and the second end being two opposite ends, and the third end and the fourth end also being two opposite ends.

[0029] The second end of the first wing plate 10 is rotatably connected to the third end of the second wing plate 20. The first end of the first wing plate 10 extends in a direction away from the second wing plate 20, and the fourth end of the second wing plate 20 extends in a direction away from the first wing plate 10. By rotatably connecting the second end of the first wing plate 10 to the third end of the second wing plate 20, the area occupied by the rotating structure on the first wing plate 10 and the second wing plate 20 can be reduced, thereby increasing the connection area between the first wing plate 10 and the second wing plate 20 and the pubic bone, resulting in a more secure fixation.

[0030] The pubic symphysis plate also includes connecting assemblies 30, which are respectively connected between the first wing plate 10 and the pubic bone, and between the second wing plate 20 and the pubic bone. That is, there is a connecting assembly 30 connecting the first wing plate 10 and the pubic bone, and another connecting assembly 30 connecting the second wing plate 20 and the pubic bone. The two connecting assemblies 30 have the same structure, but are installed in different positions.

[0031] The pubic symphysis plate provided in this embodiment, compared with the prior art, allows the first wing plate 10 and the second wing plate 20 to rotate relative to each other around the hinge point, simulating the micro-motion characteristics of a normal human pubic symphysis. This allows the pelvis to disperse cyclic loads through micro-motion in simple activity scenarios, avoiding stress concentration and improving the mechanical adaptability of the pubic symphysis plate. Compared with traditional one-piece fixation plates, this embodiment avoids excessive stress concentration caused by rigid constraints, reduces shear and pull-out forces between the connecting assembly 30 and the pubic interface, lowers the probability of screw loosening later, and improves fixation reliability. The rotating structure allows slight relative rotation between the pubic bones, avoiding compensatory forces on the hip joint and lumbar spine during activity, reducing postoperative pain in the lower back and hip, and improving patient comfort.

[0032] The first wing plate 10 and the second wing plate 20 can be micro-adjusted synchronously with the physiological movement of the pubic bone, reducing the traction and compression of soft tissues by the rigid plate, reducing foreign body sensation, expanding the patient's range of daily activities, and facilitating early rehabilitation training. The first wing plate 10 and the second wing plate 20 are fixed to the corresponding pubic bones respectively, and can independently conform to the anatomical curvature of the pubic bones on both sides, resulting in stronger installation adaptability, more secure fixation, ensuring equal fixation strength on both sides, and improving overall fixation stability.

[0033] In some embodiments, a specific cooperation method of the first wing plate 10 and the second wing plate 20 described above can be as follows: Figures 1 to 7 The structure is shown. The third end of the second wing plate 20 is provided with a hinge post 21, and the second end of the first wing plate 10 is provided with a hinge hole that rotatably engages with the hinge post 21.

[0034] In this embodiment, the length of the hinge post 21 can be the same as or less than the thickness of the first wing plate 10, thereby preventing the hinge post 21 from protruding from the first wing plate 10. On one hand, this prevents the exposed hinge post 21 from irritating the soft tissues of the pubic symphysis interspace, improving post-implantation biocompatibility and safety. On the other hand, it allows the hinge structure to be fully embedded within the connection area between the first wing plate 10 and the second wing plate 20, maintaining the smoothness of the outer surface of the pubic symphysis plate, reducing post-operative foreign body sensation, and preventing the protruding structure from affecting normal pelvic micromovements and surrounding tissue activities.

[0035] To reduce the frictional resistance between the hinge post 21 and the hinge hole and ensure the smoothness of the relative rotation of the first wing plate 10 and the second wing plate 20, in addition to improving the machining accuracy between the hinge post 21 and the hinge hole (polishing to eliminate burrs), a medical-grade lubricating coating (such as a titanium nitride coating) can be applied to the outer surface of the hinge post 21 or the inner wall of the hinge hole, or a bushing (such as polyetheretherketone) can be nested in the inner wall of the hinge hole.

[0036] As an equivalent implementation, a hinge post 21 can also be provided at the second end of the first wing plate 10, and a hinge hole can be provided at the third end of the corresponding second wing plate 20. In this case, the length of the hinge post 21 is less than or equal to the thickness of the second wing plate 20.

[0037] It should be noted that when the third end of the second wing plate 20 overlaps the second end of the first wing plate 10, the hinge post 21 is located at the bottom of the third end of the second wing plate 20; when the second end of the first wing plate 10 overlaps the third end of the second wing plate 20, the hinge post 21 is located at the top of the third end of the second wing plate 20.

[0038] In some embodiments, an improved implementation of the first wing plate 10 described above may employ, as follows: Figures 1 to 7 The structure shown is as follows. The bottom of the second end of the first wing plate 10 is provided with a hinge sleeve 11. The hinge sleeve 11 extends in the vertical direction and has an inner cavity corresponding to the hinge hole. The hinge post 21 extends into the inner cavity and rotates with the hinge sleeve 11. The hinge sleeve 11 is located in the gap between the two pubic bones.

[0039] In this embodiment, the inner cavity sidewall of the hinge sleeve 11 is flush with and continuous with the sidewall of the hinge hole.

[0040] In this embodiment, the hinge sleeve 11 extends vertically and forms a directional inner cavity, providing a longer engagement stroke for the hinge post 21 and improving the coaxiality between the hinge post 21 and the hinge hole. This ensures the stable rotation of the first wing plate 10 and the second wing plate 20, prevents radial movement or jamming of the hinge post 21, and ensures that the micro-motion trajectory conforms to the direction of physiological activity. Furthermore, due to the larger contact area, it is less prone to deformation under pelvic cyclic load, thus improving the mechanical stability and long-term durability of the overall structure.

[0041] The hinge sleeve 11 and the hinge post 21 form an embedded fit, without any sharp exposed structures, avoiding the hinge structure protruding and scraping the soft tissue in the pubic space, thus reducing postoperative irritation. The hinge sleeve 11 utilizes the space between the two pubic bones, without occupying the installation area of ​​the pubic bone surface, and without interfering with the fixation path of the connecting assembly 30, ensuring the fit between the first wing plate 10 and the second wing plate 20 and the corresponding pubic bones, improving fixation strength and reduction effect.

[0042] As described above, when the hinge post 21 is located at the top of the second wing plate 20, the hinge sleeve 11 is located at the bottom of the first wing plate 10; when the hinge post 21 is located at the bottom of the second wing plate 20, the hinge sleeve 11 is located at the top of the first wing plate 10.

[0043] It should be noted that when the hinge post 21 is installed on the first wing plate 10, the hinge sleeve 11 is installed on the second wing plate 20.

[0044] When the hinge sleeve 11 is installed on the first wing plate 10, it can be integrally formed with the first wing plate 10 (e.g., integral die casting); or the hinge sleeve 11 can be assembled with the first wing plate 10 by welding or other methods. When the hinge sleeve 11 is installed on the second wing plate 20, it can also adopt the same integral forming or separate assembly form. The forming method of the hinge post 21 and the corresponding wing plate is the same (integral forming or separate assembly).

[0045] In some embodiments, an improved implementation of the hinge post 21 may employ, as follows: Figure 5 The structure shown. The bottom end of the hinged column 21 is provided with a beveled surface 22.

[0046] The beveled surface 22 at the bottom of the hinge post 21 can form a tip guide head, which facilitates the hinge post 21 to extend into the hinge sleeve 11 and achieve automatic centering when assembling the first wing plate 10 and the second wing plate 20, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0047] It should be noted that the bottom end of the hinge post 21 is relatively sharp when it is provided with a beveled surface 22, so it is necessary to avoid the bottom end of the hinge post 21 extending out of the hinge sleeve 11 and irritating the surrounding tissue.

[0048] Specifically, in order to further improve the assembly efficiency of the hinge post 21, a rounded corner or flared end can be provided on the edge of the hinge hole away from the hinge sleeve 11, thereby expanding the alignment range and avoiding jamming caused by inconvenient alignment during installation.

[0049] In some embodiments, one specific implementation of the above-described connecting assembly 30 pieces can be as follows: Figures 1 to 2 , Figures 6 to 7 The structure is shown. Connecting assembly 30 includes multiple screws.

[0050] The screw closest to the second end in the connecting group 30 installed in the first wing plate 10 is a rivet 31, and the remaining screws are rivets 32.

[0051] The screw closest to the third end in the connecting group 30 installed in the second wing plate 20 is a rivet 31, and the remaining screws are rivets 32.

[0052] The skin screws 31 near the hinge end can achieve strong compression and precise repositioning of the cortical bone surface, ensuring close contact between the wing plate and the bone surface of the pubis. The remaining loose screws 32 penetrate deep into the cancellous bone to provide deep anchoring and overall support, ensuring the installation stability of the overall structure.

[0053] Furthermore, the skin screw 31 near the hinge end can shorten the implantation depth, avoid long screws interfering with the hinge rotation area, and at the same time avoid stress concentration at the hinge, prevent screw loosening, and ensure smooth micro-movement of the wing plate; the loosening screw 32 penetrates deep into the cancellous bone, greatly increasing the contact area between the pubis and the screw, improving the fixation effect, and meeting the stability requirements under pelvic load and cyclic load.

[0054] Skin screw 31 fits the cortical bone, while loose screw 32 is adapted to the cancellous bone area. The screw type has a higher degree of matching with the bone structure, and the wing plate fits more closely with the pubis, reducing the risk of plate lifting and displacement, and improving the anatomical reduction effect.

[0055] During actual assembly, both the first wing plate 10 and the second wing plate 20 are provided with through holes 41 corresponding to the tack 31 and the loosening nail 32. For easy identification, markings can be made around the different through holes 41 of the first wing plate 10 and the second wing plate 20, so as to make it easy to determine what size screw is used to install the through hole 41, or to determine whether the tack 31 or the loosening nail 32 is installed.

[0056] A spherical guide surface can be provided on the upward-facing side of the through hole 41 for screw installation, and the corresponding spherical surface on the screw head also has a spherical surface corresponding to the spherical guide surface. When the screw is tightened, the spherical surface of the screw head and the spherical guide surface of the through hole 41 form a spherical pair to achieve universal micro-adjustment of the screw. This facilitates the adjustment of the screw implantation direction according to the actual angle of the pubic bone surface during surgery, improves the fit between the wing plate and the bone surface, and achieves a pressure locking effect to prevent screw loosening, thereby enhancing the overall stability and reliability of the fixation.

[0057] As described above, the second end of the first wing plate 10 is located below the third end of the second wing plate 20. Therefore, there is a height difference between the second end of the first wing plate 10 and the third end of the second wing plate 20. When installed on the pubic bone, the gap between the upper wing plate and the pubic bone is relatively large. However, since the screws near the rotating ends (the second and third ends) are skin screws 31, it is convenient to apply pressure and tighten them at this point, so that the wing plate at this point fits the bone surface of the pubic bone as closely as possible, ensuring the reliability of the installation.

[0058] In some embodiments, a specific implementation of the connection group 30 described above may employ, as follows: Figures 1 to 2 , Figures 6 to 7 The structure is shown. In the same connection group 30, all the loose nails 32 may have the same or different lengths.

[0059] The thickness and density of cancellous bone vary in different locations of the pubis. The length of the 32 screw can be flexibly selected, so that each 32 screw can reach the optimal implantation depth, ensuring sufficient holding force while avoiding screw penetration of the bone cortex and damage to soft tissues, blood vessels or nerves in the pelvic cavity.

[0060] Matching different lengths of the 32 loosening screws according to bone volume and stress characteristics ensures a more uniform stress distribution for each screw, avoiding localized stress concentration, screw loosening, cortical bone cutting, or pull-out failure caused by improper length. The surgeon can flexibly select the 32 loosening screw length in real time based on the actual bone quality observed during surgery, eliminating the need to replace the pubic symphysis plate, simplifying the surgical procedure, shortening the operation time, and reducing surgical risks.

[0061] The embodiments of this application can be adapted to the differences in pubic bone structure among patients of different body types, expand the applicability of the pubic symphysis plate, and improve the versatility of the product.

[0062] For example, the first wing plate 10 is provided with four screws, which are arranged in sequence from the second end to the first end as tack 31, loose nail 32, loose nail 32, and loose nail 32. The two loose nails 32 farthest from the second end have the same length; the loose nail 32 closest to tack 31 is longer than the other two loose nails 32, and the length of tack 31 can be the same as the shorter loose nail 32.

[0063] It is easy to imagine that, depending on the different specifications of the loose nail 32 and the leather nail 31, the diameter of the through hole 41 of the corresponding screw on the first wing plate 10 and the second wing plate 20 may be the same or different.

[0064] In some embodiments, an improved implementation of the first wing plate 10 and the second wing plate 20 may employ, as follows: Figure 1 , Figures 3 to 6 The structure is shown. Both the first wing plate 10 and the second wing plate 20 are provided with mounting parts for installing the loosening nail 32.

[0065] Both the first wing plate 10 and the second wing plate 20 have notches 40 on their sidewalls, and the notches 40 are located between two adjacent mounting parts.

[0066] The skin screw 31 is positioned close to the gap between the two pubic bones, while the loosening screw 32 is positioned further away from this gap. A notch 40 is created between the mounting portions of adjacent loosening screws 32 to appropriately weaken the rigidity of the wing plate. This allows the wing plate to fit more closely to the corresponding pubic bone surface after the loosening screw 32 is installed, resulting in more stable installation. Furthermore, the wing plate can undergo slight elastic deformation during pelvic movement, allowing for more physiological micro-movements in conjunction with the hinge structure, thus preventing excessive overall rigidity from causing stress shielding.

[0067] The appropriate notch 40 can also reduce the material used in the pubic symphysis plate, reduce the weight of the first wing plate 10 and the second wing plate 20, thereby reducing the overall weight and volume of the pubic symphysis plate, reducing the local load and pressure on the pelvis, and further reducing the patient's postoperative foreign body sensation and discomfort; at the same time, the lightweight structure can reduce the stress load on the bone surface, avoid local bone resorption caused by excessive weight, and promote bone healing and early postoperative recovery.

[0068] The absence of a notch 40 between the rivet 31 and the loosening rivet 32 ​​ensures the rigidity of the wing plate near the hinge section, guarantees the strength of the hinge joint between the first wing plate 10 and the second wing plate 20, and enables their stable relative rotation process.

[0069] In some embodiments, a specific implementation of the above-described pubic symphysis plate may employ, as follows: Figure 2 and Figure 7The structure shown is as follows. The first wing plate 10 includes a first connecting portion 12, a second connecting portion 13, and a third connecting portion 14 arranged sequentially from the second end to the first end. The heights of the first connecting portion 12, the second connecting portion 13, and the third connecting portion 14 are the same or decrease sequentially. The second wing plate 20 includes a fourth connecting portion 23, a fifth connecting portion 24 and a sixth connecting portion 25 arranged sequentially from the third end to the fourth end. The heights of the fourth connecting portion 23, the fifth connecting portion 24 and the sixth connecting portion 25 are the same or decrease sequentially.

[0070] Both the first wing plate 10 and the second wing plate 20 adopt a three-section connecting part structure arranged sequentially from the hinge end to the far end, and the height of the connecting part can be kept consistent, or form a gradual shape that gradually decreases from the hinge end to the far end.

[0071] When both the first wing plate 10 and the second wing plate 20 are of equal height from the hinge end to the distal connection, they can be bent and shaped on-site during surgery according to the actual anatomical shape and surface curvature of the patient's pubic bone, without relying on pre-made gradually changing height shapes. This allows for flexible adaptation to the differences in pubic bone curvature among different patients. This type of pubic symphysis plate does not require gender differentiation or customization based on patient requests, significantly improving the product's versatility and adaptability, reducing the types of pre-operative inventory, simplifying the surgical instrument selection process, and shortening surgical preparation time.

[0072] When the first wing plate 10 and the second wing plate 20 are in the form of gradually decreasing from the hinge end to the distal end, they need to be customized before the operation. They can fit the pubic bone surface without bending during the operation, simplifying the operation and improving the fixation stability.

[0073] Specifically, the first wing plate 10 and the second wing plate 20 are made of pure titanium. Pure titanium is a medical implant-grade material with excellent biocompatibility. After implantation, it is non-toxic, non-allergenic, and non-carcinogenic, significantly reducing the risks of postoperative soft tissue inflammation and foreign body reactions, and improving long-term implantation safety. Pure titanium possesses suitable strength and elastic modulus, close to human bone tissue, providing sufficient fixation stiffness without causing stress shielding due to excessive rigidity; at the same time, it has good toughness, and combined with the hinged micro-motion structure, it can withstand pelvic cyclic loads without easily breaking.

[0074] In some embodiments, a specific implementation of the above-described pubic symphysis plate may employ, as follows: Figure 3 The structure shown. The projected shapes of the first wing plate 10 and the second wing plate 20 in the vertical direction are mirror images of each other.

[0075] The left and right wing plates are mirror-symmetrical, improving the consistency of the magnitude and direction of force on both sides of the pubic bone. This avoids problems such as screw loosening and wing plate deformation caused by excessive stress on one side, ensuring the balance of force on the pelvis. The mirror structure allows the hinge axis (i.e., the hinge column 21 mentioned above) to be naturally located in the center of the pubic symphysis. The micro-movement trajectory is symmetrical and stable, avoiding local wear, abnormal noise, or loss of repositioning caused by eccentric rotation, and ensuring reliable physiological micro-movement function.

[0076] Specifically, both the first wing plate 10 and the second wing plate 20 adopt an integrally bent plate structure. The integral bending has no weld seams and no weak splicing areas. Under the daily load of pelvic cyclic load, the overall strength is uniform, stress concentration is reduced, fatigue life is significantly improved, and the risk of plate fracture is reduced.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pubic symphysis plate, characterized in that, include: The first wing plate has a first end and a second end that are disposed opposite to each other; The second wing plate has a third end and a fourth end that are arranged opposite to each other; Wherein, the second end of the first wing plate and the third end of the second wing plate are rotatably connected, the first end of the first wing plate extends in a direction away from the second wing plate, and the fourth end of the second wing plate extends in a direction away from the first wing plate. The pubic symphysis plate also includes: The connecting assembly is respectively connected between the first wing plate and the pubic bone, and between the second wing plate and the pubic bone.

2. The pubic symphysis plate as described in claim 1, characterized in that, The third end of the second wing plate is provided with a hinge post, and the second end of the first wing plate is provided with a hinge hole that rotatably engages with the hinge post.

3. The pubic symphysis plate as described in claim 2, characterized in that, The second end of the first wing plate is provided with a hinge sleeve. The hinge sleeve extends in the vertical direction and has an inner cavity corresponding to the hinge hole. The hinge pin extends into the inner cavity and rotates with the hinge sleeve. The hinge sleeve is located in the gap between the two pubic bones.

4. The pubic symphysis plate as described in claim 2, characterized in that, The bottom end of the hinged column is provided with a beveled surface.

5. The pubic symphysis plate as described in claim 1, characterized in that, The connection assembly includes multiple screws; In the connecting assembly installed on the first wing plate, the screw closest to the second end is a rivet, and the remaining screws are loose screws; In the connecting assembly installed on the second wing plate, the screw closest to the third end is a rivet, and the remaining screws are loose screws.

6. The pubic symphysis plate as described in claim 5, characterized in that, Within the same connection group, all the loose nails may have the same or different lengths.

7. The pubic symphysis plate as described in claim 5, characterized in that, Both the first wing plate and the second wing plate are provided with mounting portions for installing the loose nails; Both the first wing plate and the second wing plate have notches on their sidewalls, and the notches are located between two adjacent mounting parts.

8. The pubic symphysis plate as described in claim 1, characterized in that, The first wing plate includes a first connecting portion, a second connecting portion, and a third connecting portion arranged sequentially from the second end to the first end, wherein the heights of the first connecting portion, the second connecting portion, and the third connecting portion are the same or decrease sequentially. The second wing plate includes a fourth connecting portion, a fifth connecting portion, and a sixth connecting portion arranged sequentially from the third end to the fourth end, wherein the heights of the fourth connecting portion, the fifth connecting portion, and the sixth connecting portion are the same or decrease sequentially.

9. The pubic symphysis plate as described in claim 1, characterized in that, The first wing and the second wing are made of pure titanium.

10. The pubic symphysis plate as described in claim 1, characterized in that, The projection shapes of the first wing plate and the second wing plate in the vertical direction are mirror images of each other.

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