Posterior cruciate ligament stop point fracture fixing device

Abstract

The utility model provides a posterior cruciate ligament stopping point fracture fixing device which comprises a fixing steel plate, a threaded sleeve and a fixing screw, and a traction hole for a first traction line to penetrate through is formed in one corner of the fixing steel plate; one end of the threaded sleeve is rotatably arranged in the middle of the fixed steel plate, the other end of the threaded sleeve is provided with a threaded hole, and the bottom of the threaded hole is connected with a second pull wire; the fixing screw is in threaded fit with the threaded hole in the threaded sleeve, and the center of the fixing screw is provided with a threading hole for the second pull wire to penetrate through. The device can be implanted under arthroscope micro-creation, and has the advantages of small trauma and less bleeding compared with the traditional open implantation; meanwhile, compared with a loop-shaped steel plate, the bone block is fixed through the pulling force of the screw, the force is larger and more stable, and healing of posterior cruciate ligament dead point avulsion fracture is facilitated; the device is simple in overall structure, low in manufacturing cost, stable in structure and high in popularization value.

Description

Technical Field

[0001] The utility model relates to the field of treatment of posterior cruciate ligament insertion fractures, in particular to a fixation device for posterior cruciate ligament insertion fractures. Background Art

[0002] As an important joint part of the human body, the knee joint plays an important role in stabilizing the body's balance activities. Among them, the posterior cruciate ligament, as an important structure of the knee joint, is mainly responsible for the normal rotation, flexion and extension of the knee joint. Posterior cruciate ligament injuries account for 3% - 20% of all knee ligament injuries, and avulsion fractures of the posterior cruciate ligament insertion are relatively common in posterior cruciate ligament injuries. Avulsion fractures of the tibial posterior cruciate ligament (PCL) insertion are mostly seen in traffic accident injuries, and are most commonly caused by the combination of a violent force from the front of the knee and a torsional force of the knee when driving or riding a motorcycle.

[0003] At present, in clinical practice, the specific surgical methods for avulsion fractures of the posterior cruciate ligament tibial insertion are generally selected according to the fracture type and displacement, but there is no unified selection standard. In the past, a large S-shaped incision was used at the back of the knee. The incision was large, with a lot of bleeding, long operation time, large trauma and poor aesthetics. The scar formed after the operation may even have a certain impact on the knee flexion function of the patient. In this regard, currently, suture anchors or sutures are commonly used for fixation. Although this method is relatively minimally invasive, its fixation stability is poor. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] The purpose of the utility model is to provide a fixation device for posterior cruciate ligament insertion fractures, which has the advantages of small trauma and sufficient fixation force. To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] (II) Technical Solutions

[0007] A fixation device for posterior cruciate ligament insertion fractures includes a fixing plate, a threaded sleeve and a fixing screw. A traction hole for the first traction wire to pass through is opened at one corner of the fixing plate; one end of the threaded sleeve is rotatably arranged in the middle of the fixing plate, and a threaded hole is opened at the other end, and a second traction wire is connected to the bottom of the threaded hole; the fixing screw is in threaded cooperation with the threaded hole on the threaded sleeve, and a wire passing hole for the second traction wire to pass through is opened at the center of the fixing screw.

[0008] Furthermore, it further includes a screwdriver for screwing the fixing screw, and a wire passing hole for the second traction wire to pass through is also opened at the center of the screwdriver.

[0009] Furthermore, the fixing plate is in a "mouth" shape, and a rotating shaft is arranged in the middle; the threaded sleeve is rotatably sleeved on the rotating shaft.

[0010] Furthermore, the threaded sleeve is T-shaped, and one lateral end thereof is rotatably sleeved on the rotating shaft.

[0011] Furthermore, the fixing steel plate as a whole is concave toward one side of the threaded sleeve to form an arc shape.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically:

[0014] 1. It can be implanted under minimally invasive arthroscopy, which has the advantages of less trauma and less bleeding compared with traditional open implantation;

[0015] 2. Compared with the loop-shaped steel plate, the utility model fixes the bone block through the pulling force of the screw, which is stronger and more stable, and is conducive to the healing of avulsion fractures of the posterior cruciate ligament attachment point;

[0016] 3. The overall structure is simple, the manufacturing cost is low, the structure is stable, and it has strong promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 Schematic diagram of the fixed plate placement;

[0020] Figure 3 This is a schematic diagram of the fixing screw being screwed in;

[0021] Figure 4 This is a schematic diagram of the completed state of bone fixation.

[0022] Description of Figure Numbers:

[0023] 1. Fixed steel plate; 11. Traction hole; 2. Threaded sleeve;

[0024] 21. Threaded hole; 3. Fixing screw; 4. Screwdriver;

[0025] 5. First traction line; 6. Second traction line; 7. Threading hole;

[0026] 8. Rotation axis; 9. Tibial tunnel. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0032] See also Figure 1 As shown, a posterior cruciate ligament insertion point fracture fixation device includes a fixing steel plate 1, a threaded sleeve 2 and a fixing screw 3. A traction hole 11 for a first traction line 5 to pass through is opened at a corner of the fixing steel plate 1; one end of the threaded sleeve 2 is rotatably arranged in the middle of the fixing steel plate 1, and the other end is opened with a threaded hole 21, and a second traction line 6 is connected to the bottom of the threaded hole 21; the fixing screw 3 is threadably matched with the threaded hole 21 on the threaded sleeve 2, and a threading hole 7 for the second traction line 6 to pass through is opened in the center of the fixing screw 3.

[0033] It can be understood that after the first traction line 5 passes through the traction hole 11, the two ends are tied into knots for easy removal.

[0034] It should be noted that a screwdriver 4 is required to screw the fixing screw 3 into the threaded sleeve 2 , and in order to prevent the second traction wire 6 from affecting the use of the screwdriver 4 , a threading hole 7 is also provided in the center of the screwdriver 4 for the second traction wire 6 to pass through.

[0035] It is worth mentioning that, in view of the fact that the bone block at the fracture site of the posterior cruciate ligament attachment point is usually a convex structure, the fixing steel plate 1 is made in the shape of a "mouth" to fix the bone block from all sides; at this time, a rotating shaft 8 is provided in the middle of the fixing steel plate 1, and the threaded sleeve 2 is rotatably mounted on the rotating shaft 8 to ensure that the threaded sleeve 2 can rotate.

[0036] In the above scheme, the threaded sleeve 2 is T-shaped, and one lateral end thereof is rotatably sleeved on the rotating shaft 8, thereby ensuring the strength of the rotating portion and avoiding deformation or even falling off during fixing.

[0037] It is understandable that the end of a human bone is usually in an arc shape, so the fixing plate 1 as a whole is concave toward one side of the threaded sleeve 2 to form an arc shape to better fit the tibia.

[0038] The method of using the utility model is as follows:

[0039] 1. After the fractured bone is repositioned, a tibial tunnel 9 is established;

[0040] 2. Insert the wire grasping forceps from the tibial tunnel 9 and use the first traction wire 5 to bring the fixation plate 1 into the joint cavity;

[0041] 3. Use the wire grasping forceps to bring the second traction wire 6 into the tibial tunnel 9, so that the threaded sleeve 2 enters the tibial tunnel 9. Figure 2 As shown;

[0042] 4. Pass the second traction wire 6 through the fixing screw 3 and the threading hole 7 in the center of the screwdriver 4 in sequence;

[0043] 5. Tighten the second traction wire 6 to make the front of the fixed steel plate 1 close to the fracture site, and then use the screwdriver 4 to screw the fixing screw 3 into the threaded sleeve 2. Figure 3 As shown;

[0044] 6. Trim the second traction line 6 according to the actual situation, suture the wound, and complete the operation. Figure 4 shown.

[0045] The advantage of the utility model is that it can be implanted under minimally invasive arthroscopy, and compared with traditional open placement, it has the advantages of less trauma and less bleeding. At the same time, compared with the loop-shaped steel plate, the utility model fixes the bone block through the pulling force of the screw, which is stronger and more stable, and is conducive to the healing of avulsion fractures of the posterior cruciate ligament attachment point.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A posterior cruciate ligament fracture fixation device, characterized in that: It includes a fixing steel plate (1), a threaded sleeve (2) and fixing screws (3). A traction hole (11) for a first traction wire (5) to pass through is formed at one corner of the fixing steel plate (1); one end of the threaded sleeve (2) is rotatably arranged in the middle of the fixing steel plate (1), and a threaded hole (21) is formed at the other end. A second traction wire (6) is connected to the bottom of the threaded hole (21); the fixing screw (3) is in threaded cooperation with the threaded hole (21) on the threaded sleeve (2), and a wire passing hole (7) for the second traction wire (6) to pass through is formed at the center of the fixing screw (3).

2. A posterior cruciate ligament fracture fixation device according to claim 1, characterized in that: It further includes a screwdriver (4) for screwing the fixing screw (3), and a wire passing hole (7) for the second traction wire (6) to pass through is also formed at the center of the screwdriver (4).

3. The posterior cruciate ligament insertion fracture fixation device according to claim 1, characterized in that: The fixing steel plate (1) is in a "mouth" shape, and a rotating shaft (8) is arranged in the middle thereof; the threaded sleeve (2) is rotatably sleeved on the rotating shaft (8).

4. A posterior cruciate ligament fracture fixation device according to claim 3, characterized in that: The threaded sleeve (2) is in a T shape, and its horizontal end is rotatably sleeved on the rotating shaft (8).

5. The posterior cruciate ligament insertion fracture fixation device according to claim 1, characterized in that: The whole fixing steel plate (1) is concave inward toward the side of the threaded sleeve (2) to form an arc shape.

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