A sacroiliac joint dislocation posterior fixation plate

Abstract

The utility model discloses a sacroiliac joint dislocation posterior fixation plate, including fixed plate, it includes fixed plate body, the fixed plate body is by dorsolateral plate and medial plate is composed, one end of dorsolateral plate with one end of medial plate is integrated and is V-shaped, be equipped with locking screw hole on medial plate, be equipped with universal locking hole on dorsolateral plate, including with the sacrum alar ilium screw of universal locking hole matching, and with locking screw hole matching locking screw. When using, only need to follow the anatomical structure of sacrum posterior, place fixed plate reasonably, follow correct screw track and place the required screw, and the screw head and fixed plate realize effective locking, form V-shaped fixation, realize the effective fixation of sacroiliac joint dislocation, reduce patient trauma, reduce the operation risk, also reduce the doctor and patient radiation exposure time. Fixed plate can be adjusted in angle in certain area, can be more consistent with the physiological curvature of different patients, and the clinician uses conveniently.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a fixation plate, and more specifically to a posterior fixation plate for sacroiliac joint dislocation. Background Technology

[0002] Sacroiliac joint dislocation is a serious clinical trauma with various treatment options. In recent years, the sacral-alar-iliac screw (SAI screw) has been increasingly used to fix sacroiliac joint dislocations, especially when posterior exploration is required due to concurrent neurovascular injury; in these cases, the SAI screw is a good choice. However, SAI screws alone may lack sufficient anti-rotation and anti-shear forces when fixing sacroiliac joint dislocations, leading to internal fixation failure and subsequent re-dislocation. Therefore, to overcome the shortcomings of SAI screws, a specialized fixation plate for sacroiliac joint dislocations needs to be developed for use in conjunction with SAI screws. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a posterior fixation plate for sacroiliac joint dislocation, thereby resolving the issue of insufficient anti-rotation and anti-shear force when using SAI screws alone to fix sacroiliac joint dislocation.

[0004] The technical solution to achieve the purpose of this utility model is: A posterior fixation plate for sacroiliac joint dislocation includes a fixation plate body, which is composed of a dorsal side plate and an inner side plate. One end of the dorsal side plate and one end of the inner side plate are integrally connected in a V-shape. The inner side plate is provided with a locking screw hole, and the dorsal side plate is provided with a universal locking hole. This includes a sacral-alar-iliac screw (SAI screw) that matches the universal locking hole, and a locking screw that matches the locking screw hole.

[0005] Furthermore, the diameter of the universal locking hole is 7.0-8.0 mm.

[0006] Furthermore, the number of locking screw holes is two.

[0007] Furthermore, the diameter of the locking screw hole is 3.0-4.0 mm.

[0008] Furthermore, the V-shaped angle formed by the back side plate and the inner side plate is 80-120°.

[0009] Furthermore, the universal locking hole is 1.5-3.0 mm away from the V-shaped fold line.

[0010] Furthermore, the center of one locking screw hole is 10.0-14.0 mm away from the V-shaped fold line, and the center of the other locking screw hole is 21.0-25.0 mm away from the V-shaped fold line; the two locking screw holes are located on the same straight line perpendicular to the V-shaped fold line.

[0011] Furthermore, the back side panel has a length of 2.5-3.0cm, a width of 1.5-2.0cm, and a thickness of 2.0-4.0mm; the inner side panel has a length of 2.5-3.0cm, a width of 1.5cm, and a thickness of 2.0-4.0mm.

[0012] Furthermore, the diameter of the SAI screw is 7.0-8.0mm, and the diameter of the locking screw is 3.0-4.0mm.

[0013] Furthermore, the back panel and inner panel are elongated strips with an arc transition at the V-shaped fold line, and the outer ends of the back panel and inner panel are arc-shaped.

[0014] In use, the fixation plate covers the dorsal side of the sacrum and the medial side of the ilium of the patient. The dorsal plate covers the dorsal side of the sacrum and the medial plate covers the medial side of the ilium, conforming to the anatomical curve of the patient. The dorsal plate has universal locking holes in the SAI screw insertion area, and its threads can match screws in various directions. The medial plate has two locking screw holes for fixing to the medial side of the ilium. With the help of two locking screws, stable fixation is achieved and movement is prevented. It can achieve the fixation effect without the need for extensive dissection of soft tissue.

[0015] The beneficial effects of this utility model are as follows: This posterior fixation plate for sacroiliac joint dislocation only requires precise placement according to the anatomical structure of the posterior sacrum. The necessary screws are then inserted following the correct screw trajectory, and the screw heads effectively lock into the plate, forming a "V"-shaped fixation. This achieves effective fixation of the sacroiliac joint dislocation, reduces patient trauma and surgical risks, and also minimizes radiation exposure time for both patients and medical staff. The plate's angle can be adjusted within a certain area to better conform to the physiological curvature of different patients, making it convenient for clinicians to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the posterior fixation plate for sacroiliac joint dislocation in the embodiment; Figure 2 This is a schematic diagram of the structure of the posterior fixation plate for sacroiliac joint dislocation in the embodiment, showing its placement on the human body.

[0017] In the diagram, 1. Fixing plate body; 2. Back plate; 3. Inner plate; 4. Locking screw hole; 5. Universal locking hole; 6. Sacral wing iliac bone screw; 7. Locking screw; 8. Sacrum; 9. Iliac bone. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. Example

[0019] like Figure 1 Figure 2 As shown, a posterior fixation plate for sacroiliac joint dislocation includes a fixation plate body 1, which is composed of a dorsal side plate 2 and an inner side plate 3. One end of the dorsal side plate 2 and one end of the inner side plate 3 are connected together in a V-shape. The inner side plate 3 is provided with a locking screw hole 4, and the dorsal side plate 2 is provided with a universal locking hole 5. It includes a sacral wing iliac bone screw 6 that matches the universal locking hole 5, and a locking screw 7 that matches the locking screw hole 4.

[0020] The diameter of the universal locking hole 5 is 7.3 mm.

[0021] The inner side plate 3 is provided with two locking screw holes 4 to better fix the fixing plate.

[0022] The diameter of the locking screw hole 4 is 3.5 mm.

[0023] The V-shaped angle formed by the back panel 2 and the inner panel 3 is 80-120°. In actual production, a series of kits with different angles can be produced as needed, such as angles of 80°, 82°, 84°...120°, to meet the needs of clinical applications.

[0024] The universal locking hole 5 is 2.0 mm away from the V-shaped fold line.

[0025] The center of one locking screw hole is 12.0 mm away from the V-shaped broken line, and the center of the other locking screw hole is 23.0 mm away from the V-shaped broken line; the two locking screw holes 4 are on the same straight line perpendicular to the V-shaped broken line.

[0026] The back panel is 2.8cm long, 1.8cm wide, and 3.0mm thick; the inner panel is 2.8cm long, 1.8cm wide, and 3.0mm thick.

[0027] The sacral wing iliac screw has a diameter of 7.3 mm, and the locking screw has a diameter of 3.5 mm.

[0028] The back panel 2 and the inner panel 3 are elongated strips with an arc transition at the V-shaped fold line, and the outer ends of the back panel 2 and the inner panel 3 are arc-shaped.

[0029] In use, the dorsal plate 2 covers the dorsal side of the patient's sacrum 8, and the medial plate covers the medial side of the patient's iliac bone 9, conforming to the patient's anatomical curve. The dorsal plate 2 has universal locking holes 5 in the SAI screw insertion area, whose threads can match sacral wing iliac bone screws 6 in different directions. The medial plate 3 has two locking screw holes 4 fixed to the medial side of the iliac bone 9, which, together with two locking screws 7, achieve stable fixation and prevent movement. This achieves the fixation effect without the need for extensive dissection of soft tissue.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A posterior fixation plate for sacroiliac joint dislocation, characterized in that, The device includes a fixing plate, which comprises a fixing plate body. The fixing plate body is composed of a back side plate and an inner side plate. One end of the back side plate and one end of the inner side plate are connected together in a V-shape. The inner side plate is provided with a locking screw hole, and the back side plate is provided with a universal locking hole. It includes a sacral wing iliac bone screw that matches the universal locking hole, and a locking screw that matches the locking screw hole.

2. The posterior fixation plate for sacroiliac joint dislocation according to claim 1, characterized in that, The diameter of the universal locking hole is 7.0-8.0 mm.

3. The posterior fixation plate for sacroiliac joint dislocation according to claim 1, characterized in that, The inner side plate is provided with two locking screw holes.

4. A posterior fixation plate for sacroiliac joint dislocation according to claim 1 or 3, characterized in that, The diameter of the locking screw hole is 3.0-4.0 mm.

5. A posterior fixation plate for sacroiliac joint dislocation according to claim 1, characterized in that, The V-shaped angle formed by the back panel and the inner panel is 80-120°.

6. The posterior fixation plate for sacroiliac joint dislocation according to claim 1, characterized in that, The distance between the universal locking hole and the V-shaped fold line is 1.5-3.0mm.

7. A posterior fixation plate for sacroiliac joint dislocation according to claim 3, characterized in that, The center of one locking screw hole is 10.0-14.0 mm from the V-shaped line, and the center of the other locking screw hole is 21.0-25.0 mm from the V-shaped line; the two locking screw holes are on the same straight line perpendicular to the V-shaped line.

8. The posterior fixation plate for sacroiliac joint dislocation according to claim 1, characterized in that, The back panel and inner panel are elongated strips with an arc transition at the V-shaped fold line, and the outer ends of the back panel and inner panel are arc-shaped.

9. A posterior fixation plate for sacroiliac joint dislocation according to claim 1, characterized in that, The back panel has a length of 2.5-3.0cm, a width of 1.5-2.0cm, and a thickness of 2.0-4.0mm; the inner panel has a length of 2.5-3.0cm, a width of 1.5cm, and a thickness of 2.0-4.0mm.

10. A posterior fixation plate for sacroiliac joint dislocation according to claim 1, characterized in that, The sacral wing iliac bone screw has a diameter of 7.0-8.0 mm, and the locking screw has a diameter of 3.0-4.0 mm.

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