Internal fixing plate for anterior fixation of acetabular fracture
By designing an internal fixing plate for acetabular fracture, including the arcuate main plate and the quadrilateral body plate, the problem of inadequate fit and not firm enough in the prior art is solved, and the stable reduction and firm fixation of the quadrilateral body of the acetabular body is achieved.
Patent Information
- Application Number
- CN202421751975.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In the prior art, when treating acetabular quadrilateral fracture, the pelvic plate is not suitable enough, it is difficult to shape during surgery, is not fixed firmly enough, and is prone to loosening or displacement, resulting in adverse consequences such as fracture deformity healing.
An internal fixing plate for fixing anterior path of acetabular fracture was designed, including an arcuate edge main plate and a four-sided body plate. The arcuate edge main plate is equipped with a posterior column screw hole, the side wall of the threaded hole is raised, and the sleeve is directly connected without a guide block. The threaded hole is obliquely internal thread, and the axis deviates from the acetabular socket, which enhances the fixing safety.
This internal fixation plate can effectively reduce the intraoperative shaping steps, enhance the blocking force of the acetabular quadrilateral body, ensure stable reduction and firm fixation of the fracture, and reduce the risk of postoperative complications.
Smart Images
Figure CN222983138U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to a medical device, and more specifically, it is an internal fixing plate for anterior fixation of acetabular fractures. Background Art
[0002] With the development of current transportation, while facilitating life, the number of patients with acetabular fractures caused by car accidents or other reasons is increasing year by year. Pelvic fractures are mostly caused by high-energy trauma, and the disease develops critically. The position of the pelvis determines that the surgery for acetabular fractures is relatively complex. The pelvis is located deep, with rich blood vessels and nerves, making the surgical operation difficult.
[0003] Currently, the pelvic bone plates on the market are not well-fitting, difficult to shape during the operation, and have insufficient blocking force on the acetabular quadrilateral body. Some fracture types cannot meet the usage requirements, especially for comminuted or severely displaced quadrilateral body fractures, it is very difficult to perform good reduction and fixation. Or pure screw fixation is used, but the fixation is not firm enough, easy to loosen or displace, which may cause adverse consequences such as malunion of fractures. Using posterior column screws and two-window screws in combination on the pelvic bone plate is a common internal fixation method for treating acetabular quadrilateral body fractures. Some doctors will choose to use instruments such as guide blocks and sleeves when implanting posterior column screws. However, due to the deep position of the pelvis, there will be occlusion when installing the guide block during the operation, and the implantation is difficult, easy to enter the joint surface or damage blood vessels, resulting in postoperative complications. Summary of the Invention
[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned existing background art, and provide an internal fixing plate for anterior fixation of acetabular fractures.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An internal fixing plate for anterior fixation of acetabular fractures, characterized in that it includes an arcuate edge main board; the arcuate edge main board is in an arc-shaped strip structure, fitting on the arcuate edge. There is a posterior column screw hole on the arcuate edge main board, and the posterior column screw hole is a combined hole formed by the communication of a threaded hole and a smooth hole. The side wall of the threaded hole is higher than the upper surface of the arcuate edge main board, and the axis of the threaded hole is in the direction away from the acetabular fossa.
[0007] In the above technical solution, it further includes a quadrilateral body plate;
[0008] The quadrilateral plate has an anatomical structure that conforms to the quadrilateral, including a first longitudinal plate, a second longitudinal plate, a first transverse plate, and a second transverse plate; one end of the first longitudinal plate and one end of the second longitudinal plate are connected to form a V-shaped structure, and the other end of the first longitudinal plate and the other end of the second longitudinal plate are away from each other and are both connected to the arcuate margin main board; one end of the first transverse plate and one end of the second transverse plate are both connected to the first longitudinal plate, and the other end of the first transverse plate and the other end of the second transverse plate are both connected to the second longitudinal plate.
[0009] In the above technical solution, at least one screw hole is provided on the first longitudinal plate, the second longitudinal plate, the first transverse plate, and the second transverse plate.
[0010] In the above technical solution, one second long hole is provided at one end of the first longitudinal plate away from the arcuate margin main board, four of the second long holes are provided on the second longitudinal plate at intervals, one of the second long holes is provided at a position of the first transverse plate close to the second longitudinal plate, and one of the second long holes is provided at a position of the second transverse plate close to the second longitudinal plate.
[0011] In the above technical solution, one end of the first transverse plate and one end of the second transverse plate are arranged at intervals along the length direction of the first longitudinal plate;
[0012] In the above technical solution, the other end of the first transverse plate and the other end of the second transverse plate are arranged at intervals along the length direction of the second longitudinal plate.
[0013] In the above technical solution, the arcuate margin main board is provided with a plurality of screw holes. The screw holes on one side of the posterior column screw hole are two round holes, and the screw holes on the other side of the posterior column screw hole are three first long holes, one two-window screw hole, and three of the round holes in sequence.
[0014] In the above technical solution, the end of the first longitudinal plate connected to the arcuate margin main board is connected between the two-window screw hole and the first long hole, and the end of the second longitudinal plate connected to the arcuate margin main board is connected to the side wall of the posterior column screw hole.
[0015] In the above technical solution, the arcuate margin main board further includes a side plate. The side plate is connected to the side wall of the posterior column screw hole, and at least part of the side plate is used for fitting and fixing the inner side wall of the quadrilateral.
[0016] In the above technical solution, the arcuate margin main board is provided with a guide pin hole.
[0017] The advantages of the present utility model are as follows: the arcuate edge plate or the integrated plate composed of the arcuate edge main plate and the quadrilateral body plate can be freely selected according to the intraoperative fracture classification. Both the arcuate edge main plate and the quadrilateral body plate are designed to fit the bone anatomy, which can effectively reduce the intraoperative shaping steps. The side wall of the threaded hole of the posterior column screw hole on the arcuate edge main plate is heightened, higher than the upper surface of the arcuate edge main plate. When used during the operation, a sleeve can be directly connected without connecting a guide block, reducing the doctor's surgical operation steps and facilitating the safe insertion of the screw by the doctor. At the same time, the internal thread of the threaded hole is an inclined internal thread, and the axis of the threaded hole deviates in the direction away from the acetabular fossa, making the fixation safer. On the other hand, a large range of bone plate areas in the quadrilateral body plate part of the present utility model, including the first longitudinal plate, the second longitudinal plate, the first transverse plate, and the second transverse plate, can effectively block the quadrilateral body. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 FIG. is a schematic structural diagram of Embodiment 1 of the present utility model.
[0019] Figure 2 FIG. is a schematic diagram of the usage state of Embodiment 1 of the present utility model Figure 1 .
[0020] Figure 3 FIG. is a schematic diagram of the usage state of Embodiment 1 of the present utility model Figure 2 .
[0021] Figure 4 FIG. is a schematic structural diagram of Embodiment 2 of the present utility model Figure 1 .
[0022] Figure 5 FIG. is a schematic structural diagram of Embodiment 2 of the present utility model Figure 2 .
[0023] Figure 6 FIG. is a schematic diagram of the usage state of Embodiment 2 of the present utility model.
[0024] Wherein: 1 - arcuate edge main plate; 11 - side plate; S1 - posterior column screw hole (where S11 - threaded hole, S12 - clearance hole); S2 - two-window screw hole; S3 - round hole; S4 - first long hole; S5 - guide pin hole;
[0025] 2 - quadrilateral body plate; 21 - first longitudinal plate; 22 - second longitudinal plate; 23 - first transverse plate; 24 - second transverse plate; 25 - first blood supply groove; 26 - second blood supply groove; 27 - third blood supply groove; S6 - second long hole;
[0026] 110 - arcuate edge; 120 - quadrilateral body; 130 - iliac fossa; 140 - ischial spine; 150 - superior pubic ramus; 160 - acetabular fossa; 170 - ischial tuberosity. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] The following will describe in detail the implementation of the present utility model in conjunction with the accompanying drawings. However, they do not constitute a limitation to the present utility model and are only for illustration purposes. At the same time, the advantages of the present utility model will become clearer and easier to understand through the description.
[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0029] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0030] Embodiment 1
[0031] Referring to the attached Figures 1-3 It can be seen that Embodiment 1 of the present utility model provides an internal fixing plate for anterior fixation of acetabular fractures, including an arcuate edge main board 1. The arcuate edge main board 1 has an arc-shaped strip structure and fits on the arcuate edge 110. The arcuate edge main board 1 can be used as a separate bone plate to fix various fractures with the vertical fracture line below the arcuate edge 110. The arcuate edge main board 1 is adapted to the anatomical structure of the arcuate edge 110, reducing the intraoperative shaping steps.
[0032] In Embodiment 1 of the present utility model, referring to Figure 1 , a posterior column screw hole S1 is provided on the arcuate edge main board 1. The posterior column screw hole S1 is a combined hole formed by the communication of a threaded hole S11 and a smooth hole S12. The side wall of the threaded hole S11 is higher than the upper surface of the arcuate edge main board 1, and the axis of the threaded hole S11 is in the direction away from the acetabular fossa 160. The threaded hole S11 with a higher side wall can be directly connected to the sleeve without installing a guide block again, avoiding intraoperative occlusion, reducing the surgical operation steps, and also facilitating the doctor to accurately control the drilling direction. The length direction of the posterior column screw hole S1, that is, the connection line of the centers of the threaded hole S11 and the smooth hole S12, forms an acute angle with the central axis of the arcuate edge main board 1.
[0033] Furthermore, as shown in Figure 2 and Figure 3As shown, the posterior column screw hole S1 penetrates through the upper and lower surfaces of the arcuate margin main board 1. The internal thread in the threaded hole S11 is inclined, that is, the axial direction of the internal thread is inclined and deviates away from the acetabular fossa 160, so that the implanted screw is as far away from the acetabular fossa 160 as possible to ensure implantation safety. The threaded hole S11 can be used in conjunction with posterior column tension screws of different lengths. When a shorter posterior column tension screw is inserted into the threaded hole S11, the posterior column tension screw can be driven into the ischial spine 140; when a longer posterior column tension screw is inserted into the threaded hole S11, the posterior column tension screw can be driven into the ischial tuberosity 170.
[0034] The inner wall of the clearance hole S12 is smooth. According to the actual situation of the bone during the operation, it is also possible to choose to implant the screw into the clearance hole S12. The clearance hole S12 of the posterior column screw hole S1 protrudes outward from the side of the arcuate margin main board 1.
[0035] In the first embodiment, see Figure 1 , the arcuate margin main board 1 is also provided with a plurality of screw holes. The screw holes on one side of the posterior column screw hole S1 are two round holes S3, and the screw holes on the other side of the posterior column screw hole S1 are three first long holes S4, a two-window screw hole S2, and three round holes S3 in sequence. Specifically, the inner walls of the two-window screw hole S2, the round holes S3, and the first long holes S4 are smooth. The two-window screw hole S2, the round holes S3, and the first long holes S4 are basically located on the central axis of the arcuate margin main board 1 and all penetrate through the upper and lower surfaces of the arcuate margin main board 1. Among them, the two-window screw hole S2 and the first long hole S4 are both long holes and their long axis directions extend along the length direction of the arcuate margin main board 1. The long axis of the two-window screw hole S2 is longer than the long axis of the first long hole S4.
[0036] In the first embodiment, the arcuate margin main board 1 further includes a side plate 11. The side plate 11 is connected to the side wall of the posterior column screw hole S1, and at least part of the side plate 11 is used to fit and fix the inner side wall of the quadrilateral body 120. As Figure 1 shown, one end of the side plate 11 is connected to the side wall of the clearance hole S12 away from the threaded hole S12, and the other end of the side plate 11 is a round and blunt free end. The side plate 11 is bent and fits the junction of the arcuate margin 110 and the quadrilateral body 120, so that the side plate 11 is hooked at the junction, thereby preventing the arcuate margin main board 1 from moving away from the side of the quadrilateral body 120, ensuring that the posterior column screw can be smoothly driven into the posterior column screw hole S1, and preventing the posterior column screw from piercing out from the outside of the pelvis and damaging the sciatic nerve or the acetabular fossa 160.
[0037] In the first embodiment, see Figure 1, a guide pin hole S5 is also provided on the arcuate edge main board 1. The axis of the guide pin hole S5 is perpendicular to the upper and lower surfaces of the arcuate edge main board 1. A guide pin (not shown) can be inserted into the guide pin hole S5, which plays a role of temporary positioning during the operation. The number of the guide pin holes S5 is two. Among them, one guide pin hole S5 is located between the two round holes S3, and the other guide pin hole S5 is located on the side of the side plate 11 close to the light hole S12. The number of the guide pin holes S5 can also be multiple, and the specific number can be reasonably set according to the surgical needs.
[0038] See Figure 2 , one end of the arcuate edge main board 1 is located on the superior pubic ramus 150, and the other end is located below the iliac fossa 130.
[0039] In the first embodiment, the thickness of the arcuate edge main board 1 is relatively thin, which is 2 mm - 3 mm, meeting both the requirements of the bone plate strength and facilitating intraoperative shaping.
[0040] In the first embodiment, the screw holes on the arcuate edge main board 1 are all low-profile notches, which can reduce the irritation of the bone plate to the soft tissue.
[0041] Embodiment 2
[0042] The arcuate edge main board 1 can be used as a separate fixing plate for the arcuate edge 110 to fix various fractures with the vertical fracture line located below the arcuate edge 110, etc. However, if it is necessary to strengthen the block of the quadrilateral body 120, an internal fixation device for acetabular fracture with the arcuate edge main board 1 integrated with the quadrilateral body plate 2 can be selected for fixation.
[0043] Therefore, in the second embodiment, an internal fixing plate for anterior fixation of acetabular fracture is provided, including an arcuate edge main board 1 and a quadrilateral body plate 2. See Figures 3-6 . Among them, the arcuate edge main board 1 is in an arc-shaped strip structure, fitting the arcuate edge 110. The arcuate edge main board 1 is adapted to the anatomical structure of the arcuate edge 110, and the quadrilateral body plate 2 is in an anatomical structure fitting the quadrilateral body 120, which can effectively reduce the intraoperative shaping steps.
[0044] In the second embodiment, the quadrilateral body plate 2 is connected to the arcuate edge main board 1, which can accurately position the intraoperative fixation position of the arcuate edge main board 1. The structure and the used part of the arcuate edge main board 1 are the same as those of the arcuate edge main board 1 in the first embodiment. For details, see Figure 1 、 Figure 2 And Figure 4 、 Figure 6 , and will not be elaborated here.
[0045] In the second embodiment, see Figure 5, the quadrilateral plate 2 includes a first longitudinal plate 21, a second longitudinal plate 22, a first transverse plate 23 and a second transverse plate 24; one end of the first longitudinal plate 21 and one end of the second longitudinal plate 22 are connected to form a V-shaped structure, and the other end of the first longitudinal plate 21 and the other end of the second longitudinal plate 22 are far away from each other and are both connected to the arcuate edge main board 1; one end of the first transverse plate 23 and one end of the second transverse plate 24 are both connected to the first longitudinal plate 21, and the other end of the first transverse plate 23 and the other end of the second transverse plate 24 are both connected to the second longitudinal plate 22. The overall structure of the quadrilateral plate 2 is triangular. When in use, the lowermost end of the quadrilateral plate 2 does not exceed the ischial spine 140.
[0046] The first longitudinal plate 21, the second longitudinal plate 22, the first transverse plate 23 and the second transverse plate 24 are each provided with at least one screw hole, which can enhance the fixation of the quadrilateral plate 2. Specifically, one end of the first longitudinal plate 21 away from the arcuate edge main board 1 is provided with a second long hole S6, four second long holes S6 are spaced on the second longitudinal plate 22, one second long hole S6 is provided at a position of the first transverse plate 23 close to the second longitudinal plate 22, and one second long hole S6 is provided at a position of the second transverse plate 24 close to the second longitudinal plate 22. The second long holes S6 are all long holes with smooth inner walls. The arrangement directions of the second long holes S6 on the quadrilateral plate 2 are divided into two types: horizontal setting (that is, the long axis of the second long hole S6 extends along the length direction of the bone plate) and vertical setting (that is, the long axis of the second long hole S6 extends along the direction perpendicular to the length direction of the bone plate), which can meet various clinical fixation situations during the operation and meet the reduction and blocking fixation of different comminuted fractures of the quadrilateral 120, etc.
[0047] One end of the first transverse plate 23 and one end of the second transverse plate 24 are spaced along the length direction of the first longitudinal plate 21; the other end of the first transverse plate 23 and the other end of the second transverse plate 24 are spaced along the length direction of the second longitudinal plate 22, that is, the first transverse plate 23 and the second transverse plate 24 do not intersect. In other embodiments, one end of the first transverse plate 23 and one end of the second transverse plate 24 are spaced along the length direction of the first longitudinal plate 21 or the second longitudinal plate 22, the other end of the first transverse plate 23 and the other end of the second transverse plate 24 may be connected to each other, or the first transverse plate 23 and the second transverse plate 24 are in other intersecting relationships.
[0048] In the second embodiment, three blood circulation grooves are formed on the quadrilateral plate 2, which can maintain blood circulation after the operation and is beneficial to recovery. Specifically, the arcuate edge main board 1, the first longitudinal plate 21, the first transverse plate 23 and the second longitudinal plate 22 enclose a rectangular-like first blood circulation groove 25; the first longitudinal plate 21, the first transverse plate 23, the second longitudinal plate 22 and the second transverse plate 24 enclose a rectangular-like second blood circulation groove 26; the first longitudinal plate 21, the second transverse plate 24 and the second longitudinal plate 22 enclose a triangular-like third blood circulation groove 27.
[0049] In the second embodiment, one end of the first longitudinal plate 21 connected to the arcuate edge main board 1 is connected between the two-window screw hole S2 and the first long hole S4, and one end of the second longitudinal plate 22 connected to the arcuate edge main board 1 is connected to the side wall of the posterior column screw hole S1. The first longitudinal plate 21 and the second longitudinal plate 22 extend from one side of the arcuate edge main board 1 at an acute angle of nearly 90 degrees, so that the angle between the plane where the quadrilateral plate 2 is located and the plane where the arcuate edge main board 1 is located is an acute angle to match the acetabular bone structure. In the second embodiment, the bent part of the second longitudinal plate 22 is similar in structure and function to the side plate 11 in the first embodiment. Therefore, on the basis of the existence of the second longitudinal plate 22, the setting of the side plate 11 is cancelled in the second embodiment.
[0050] In the second embodiment, see Figure 4 , a guide pin hole S5 is further provided on the arcuate edge main board 1. The axis of the guide pin hole S5 is perpendicular to the upper and lower surfaces of the arcuate edge main board 1. A guide pin (not shown) can be inserted into the guide pin hole S5, which plays a role of temporary positioning during the operation. The number of the guide pin holes S5 is two. Among them, one guide pin hole S5 is located between the posterior column screw hole S1 and the first long hole S4, and the other guide pin hole S5 is located between the two round holes S3. The number of the guide pin holes S5 can also be multiple, and the specific number can be reasonably set according to the surgical needs.
[0051] In the second embodiment, the thickness of the arcuate edge main board 1 is 2 mm - 3 mm, and the thickness of the quadrilateral plate 2 is 2 mm - 2.2 mm, which not only meets the requirements of the bone plate strength but also facilitates intraoperative shaping.
[0052] In the second embodiment, the screw holes on the arcuate edge main board 1 and the quadrilateral plate 2 are all low-notch, which can reduce the irritation of the bone plate to the soft tissue.
[0053] The fixed bone plate formed by integrally molding the arcuate edge main board 1 and the quadrilateral plate 2 provided in the second embodiment has the advantages that the quadrilateral plate 2 has a large bone plate area, which can overcome the deficiencies of mechanical mismatch and limited blocking force on the quadrilateral body 120 in the prior art, effectively block the quadrilateral body 120, and can also shape or cut the quadrilateral plate 2 according to the actual situation during the operation to remove the redundant transverse plate.
[0054] The utility model can freely select the integrated plate of the arcuate edge main board 1 and the quadrilateral plate 2 or the arcuate edge main board 1 according to the intraoperative fracture classification, and the arcuate edge main board 1 in the two structures is the same.
[0055] Other parts not described are all prior art.
Claims
1. An internal fixation plate for anterior fixation of acetabular fracture, characterized in that: It comprises an arcuate edge main board (1); The arcuate rim main board (1) is in an arcuate strip structure and is fitted to the arcuate rim (110). A posterior column screw hole (S1) is provided on the arcuate rim main board (1). The posterior column screw hole (S1) is a combined hole formed by connecting a threaded hole (S11) and a light hole (S12). The side wall of the threaded hole (S11) is higher than the upper surface of the arcuate rim main board (1), and the axis of the threaded hole (S11) is located in a direction away from the acetabulum (160).
2. The internal fixation plate for anterior fixation of acetabular fracture according to claim 1, characterized in that: Also includes a quadrilateral plate (2); The quadrilateral plate (2) is in a shape that fits the anatomical structure of the quadrilateral (120), and includes a first longitudinal plate (21), a second longitudinal plate (22), a first transverse plate (23) and a second transverse plate (24); one end of the first longitudinal plate (21) and one end of the second longitudinal plate (22) are connected to form a V-shaped structure, and the other end of the first longitudinal plate (21) and the other end of the second longitudinal plate (22) are far away from each other and are both connected to the arcuate edge main plate (1); one end of the first transverse plate (23) and one end of the second transverse plate (24) are both connected to the first longitudinal plate (21), and the other end of the first transverse plate (23) and the other end of the second transverse plate (24) are both connected to the second longitudinal plate (22).
3. The internal fixation plate for anterior fixation of acetabular fracture according to claim 2, characterized in that: The first longitudinal plate (21), the second longitudinal plate (22), the first transverse plate (23) and the second transverse plate (24) are each provided with at least one screw hole.
4. The internal fixation plate for anterior fixation of acetabular fracture according to claim 3, characterized in that: A second long hole (S6) is provided at one end of the first longitudinal plate (21) away from the bow-shaped edge main plate (1), four second long holes (S6) are provided at intervals on the second longitudinal plate (22), a second long hole (S6) is provided on the first transverse plate (23) near the second longitudinal plate (22), and a second long hole (S6) is provided on the second transverse plate (24) near the second longitudinal plate (22).
5. The internal fixation plate for anterior fixation of acetabular fracture according to claim 2, characterized in that: One end of the first transverse plate (23) and one end of the second transverse plate (24) are arranged at intervals along the length direction of the first longitudinal plate (21).
6. The internal fixation plate for anterior fixation of acetabular fracture according to claim 5, characterized in that: The other end of the first transverse plate (23) and the other end of the second transverse plate (24) are arranged at intervals along the length direction of the second longitudinal plate (22).
7. The internal fixation plate for anterior fixation of acetabular fracture according to claim 2, characterized in that: The arcuate edge main board (1) is provided with a plurality of screw holes, wherein the screw holes on one side of the rear column screw hole (S1) are two circular holes (S3), and the screw holes on the other side of the rear column screw hole (S1) are three first long holes (S4), one second window screw hole (S2) and three circular holes (S3) in sequence.
8. The internal fixation plate for anterior fixation of acetabular fracture according to claim 7, characterized in that: One end of the first longitudinal plate (21) connected to the arcuate edge main plate (1) is connected between the second window screw hole (S2) and the first long hole (S4), and one end of the second longitudinal plate (22) connected to the arcuate edge main plate (1) is connected to the side wall of the rear column screw hole (S1).
9. The internal fixation plate for anterior fixation of acetabular fracture according to claim 1, characterized in that: The arcuate edge main board (1) further comprises a side plate (11), wherein the side plate (11) is connected to the side wall of the posterior column screw hole (S1), and at least a portion of the side plate (11) is used to fit and fix the inner side wall of the quadrilateral (120).
10. The internal fixation plate for anterior fixation of acetabular fracture according to claim 2, characterized in that: The arcuate edge main board (1) is provided with a needle guide hole (S5).