Absorbable fixing loop for treating back cross ligament avulsion fracture

Abstract

An absorbable fixation loop for treating avulsion fracture of posterior cruciate ligament belongs to the technical field of orthopedic medical devices and is used for treating avulsion fracture of posterior cruciate ligament under arthroscopy. The technical solution is: the two ends of the fixed loop are parallel and opposite fixed flat plates, the middle of the fixed loop is an upward arch, the arch is composed of a pressing plate and an arc-shaped plate, the pressing plate is a flat plate, and the upper ends of the two arc-shaped plates are respectively connected At both ends of the pressing plate, threading holes are respectively arranged on the fixing plates at the two ends of the fixing loop, and the material of the fixing loop is absorbable material. The present invention can make the fracture surface fit more closely, which is beneficial to healing; the present invention can be completely degraded and absorbed in the body, avoiding the risk of foreign bodies remaining in the joint cavity after surgery, and solving the problem of taking out the internal fixation in the second operation; the present invention can Provides optimal hardness, reducing the risk of internal fixation fracture after surgery. The invention has the advantages of simple structure, convenient use and excellent effect, and can obtain optimal prognosis curative effect in the treatment of posterior cruciate ligament avulsion fracture.

Description

technical field [0001] The invention relates to an absorbable fixation loop for arthroscopic treatment of avulsion fracture of the posterior cruciate ligament, which belongs to the technical field of orthopedic medical devices. Background technique [0002] Avulsion fracture of the posterior cruciate ligament is a violent injury in the field of sports medicine, which is commonly seen in car accident injuries or competitive sports injuries of high-level athletes. The traditional treatment method is to make an incision at the back of the knee joint to fix the fracture fragments. However, due to the rich distribution of blood vessels and nerves in the back of the knee joint, it is easy to cause damage, and the clinical treatment is very difficult. [0003] With the promotion and popularization of precision medicine and minimally invasive concepts, for the avulsion fracture of the posterior tibial condyle of the posterior cruciate ligament, the clinically selected treatment meth...

AI Technical Summary

Problems solved by technology

However, the serious disadvantages of this surgical treatment method are: in order to restore the inherent tension of the posterior cruciate ligament, the puller wire needs to be tightened, and the puller wire is tightened to compress the ligament, which will block or cut the ligament and cause the ligament to stop. Poor local blood circulation and poor fracture union at the connecting part, or the cutting of the avulsed fracture fragment will destroy the bone continuity after reduction

[0004] At present, another clinical treatment method is to fix the avulsion of the posterior cruciate ligament with a loop plate to convert the local tensile stress into compressive stress. Although this method can eliminate the cutting effect of the puller wire, it still has some obvious disadvantages: First, the loop plate is a titanium alloy steel level design material, which is designed to be used for graft fixation at the outer opening of the tibial tunnel or the outer opening of the femoral tunnel during arthroscopic reconstruction of the anterior and posterior cruciate ligaments, and cannot be used in the joint cavity. Fracture reduction and fixation

For patients with posterior cruciate ligament avulsion fractures, especially those with old injuries, freshening of the fracture surface must be carried out. As a result, while obtaining good fracture healing, it will inevitably cause the mismatch of the fracture surface. The phenomenon of "seesaw" between the fracture block and the tibial side wound surface is difficult to fit perfectly. In addition, the flexion and extension of the knee joint after surgery will further cause the micro-movement of the fracture block, which is not conducive to fracture healing and may even cause fractures. non-healing

Second, since the loop plate is a non-absorbable material, it is a foreign body in the joint cavity after surgery. At the same time, the puller wire may be fatigued and fractured during the postoperative knee flexion and extension process, so the loop plate in the joint cavity There is a greater risk of becoming a loose body in the joint. Once the loop plate is freed after surgery, it will seriously damage the articular cartilage and other intra-articular structures

Third, the internal fixation of the joint needs to be removed within 1.5 to 2 years after the operation. It is very difficult to remove the loop plate fixed on the tibial side of the posterior cruciate ligament under arthroscopic examination. For internal fixation at the same position, an arthroscopic posteromedial approach must be established to complete the removal of the internal fixation. However, the first fracture reduction operation may cause bone destruction and hyperplasia around the loop plate, which makes it more difficult to embed the loop plate. If it is taken out, it will bring additional secondary trauma to the patient, and the secondary operation will also increase the total treatment cost of the patient.

[0005] In summary, the current clinical treatment measures for posterior cruciate ligament avulsion fractures are difficult to achieve satisfactory results, and posterior cruciate ligament avulsion fractures have become a difficult problem in clinical treatment, especially in the current precision medicine and minimally invasive surgery. The problem has been effectively solved, which directly affects the application and promotion of minimally invasive surgery in the treatment of posterior cruciate ligament avulsion fractures, and it is necessary to solve it as soon as possible

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