Fixing device, fixing method and application method for reconstruction of cruciate ligaments

Abstract

The invention discloses a fixing device, a fixing method and an application method for reconstruction of cruciate ligaments. The fixing device comprises a driven nail and an expansion nail sleeve. In an unexpanded state, four axially-extending grooves are formed on the peripheral side surface of a sleeve body in an inwardly and radial sinking mode. By means of the grooves, splitting of ligaments is achieved. In an expansion state, the driven nail is inserted into a sleeve body by means of an opening. Under the effect of the driven nail, the grooves are outwardly extruded so that expansive fixation is achieved. The fixing device, fixing method and application method for reconstruction of cruciate ligaments have following beneficial effects: 360-degree uniform expansion of the expansion nail sleeve is ensured; the expansion nail sleeve is prevented from being broken; transported tendons are not cut by the surgery of reconstruction of ligament; tendons are divided into four bundles by extrusion in a radial direction for effective fixation; fine fixation effect is obtained; full contact among transported tendons and a bone tunnel is achieved; recovery of tendons and bones is further promoted so that the fixing device is suitable for operative habits of a doctor; and the fixing device is easily and conveniently used without additional learning.

Description

technical field [0001] The invention relates to the technical field of medical biological internal fixation instruments, in particular to a fixation device, a fixation method and a use method for cruciate ligament reconstruction. Background technique [0002] The cruciate ligament is an important structure to maintain the stability of the knee joint. After the injury or rupture of the cruciate ligament, improper treatment will lead to instability of the knee joint, which will accelerate the degeneration of articular cartilage and meniscus, and increase the incidence of other structural injuries of the joint, resulting in The patient's daily activities are limited, and gradually lead to a decline in self-care ability. [0003] With the development of arthroscopic technique, arthroscopic reconstruction of ACL with transplanted tendon has become the main method for the treatment of ACL injury. The fixation of the grafted tendon is the most important link in ACL reconstruction ...

AI Technical Summary

Problems solved by technology

The inner core screw used is designed with a zigzag thread and can only enter the expansion sleeve by rotation, so it cannot be guaranteed that the inner and outer axes of the screwing path are on the same line, which makes the extrusion pressure on the expansion sleeve deviate and cannot be smoothly expand

Secondly, according to the flexible nature of the knee joint, after long-term activities, the cooperation between the expansion sleeve and the internal and external threads of the inner core screw is prone to loosening, resulting in a greatly reduced fixation effect.

Images