Bone tunnel fixator for anterior cruciate ligament reconstruction

Abstract

The invention discloses a bone tunnel fixator for anterior cruciate ligament reconstruction. The bone tunnel fixator comprises a femur-end internal fixation assembly and a tibia-end internal fixation assembly. The femur-end internal fixation assembly comprises a first hollow screw, a first internal screw and a first guide threaded rod, the diameter of the tail end of the first hollow screw is larger than that of the front end of the first hollow screw, the first hollow screw is in the shape of a combination, the combination comprises an incomplete reverse cone and a cylinder which are connected with each other, internal threads of the first hollow screw are matched with external threads of one end of the first internal screw, a loop used for hanging a transplanted ligament is arranged at the other end of the first internal screw, and the outer diameter of the first guide threaded rod is smaller than the inner diameter of the first internal screw; the tibia-end internal fixation assembly is similar to the femur-end internal fixation assembly. The bone tunnel fixator has the advantages that longitudinal movement (a bungee jumping effect) and transverse movement (a windshield wiper effect) between a transplanted tendon and a bone tunnel can be reduced, loss of the bone mass of a patient is reduced, the bone tunnel fixator is firm in fixation, the contact area of the transplanted tendon and the bone tunnel is large, and healing of the bone and the tendon of the patient is further promoted.

Description

technical field [0001] The invention relates to a medical device, in particular to a bone tunnel fixator for anterior cruciate ligament reconstruction. Background technique [0002] The anterior cruciate ligament is an important structure to maintain the stability of the knee joint. After the injury, the knee joint becomes unstable, which accelerates the degeneration of the articular cartilage and meniscus, and increases the probability of damage to other joint structures. With the development of arthroscopic technology, arthroscopic reconstruction of the anterior cruciate ligament with transplanted tendon has become the main method for the treatment of anterior cruciate ligament injury. However, with the increasing number of patients undergoing cruciate ligament reconstruction, there are also increasing cases of graft tendon loosening, tunnel enlargement, and graft ligament re-rupture after surgery requiring revision, which is a new challenge for knee ACL reconstruction. S...

AI Technical Summary

Problems solved by technology

Although the emergence of new technologies and new materials has provided clinicians with a variety of choices, enriched treatment methods, and improved the therapeutic effect of ligament reconstruction to a certain extent, it is still difficult to meet clinical needs.

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