Expanding type extrusion nail

Abstract

The invention relates to an expanding type extrusion nail and belongs to a surgical implant which is used for fixing a tendon implant in a knee anterior cruciate ligament reconstruction surgery. The expanding type extrusion nail comprises an expanding type extrusion nail body, an eccentric toothed rotating rod, a telescopic rod, a telescopic spring and a locking bolt. A threaded stepped hole is formed in one side of the expanding type extrusion nail body. An eccentric toothed rotating rod installing notch is formed in the other side of the expanding type extrusion nail body. Positioning holes are formed in two ends of the eccentric toothed rotating rod installing notch. One surface of the eccentric toothed rotating rod is a smooth surface, and the other surface of the eccentric toothed rotating rod is a toothed surface. A locking groove is formed in the middle of the eccentric toothed rotating rod. The eccentric toothed rotating rod is arranged in the eccentric toothed rotating rod installing notch in an inserted mode. Short shafts which are arranged at the upper end and the lower end of the eccentric toothed rotating rod are arranged in the positioning holes of the two ends of the expanding type extrusion nail in an inserted mode. The telescopic spring is arranged on the telescopic rod in a sleeved mode. The telescopic rod is arranged inside the threaded stepped hole of the middle portion of the expanding type extrusion nail body in an inserted mode. The telescopic rod is compressed tightly by the locking bolt.

Description

technical field [0001] The expandable extrusion nail of the present invention relates to a surgical implant for treating tendon grafts fixed in anterior cruciate ligament reconstruction of the knee joint. Background technique [0002] The anterior cruciate ligament is one of the main devices to maintain the stability of the knee joint. If the injury or rupture of the anterior cruciate ligament is not treated properly, it will lead to instability of the knee joint, secondary articular cartilage damage, and eventually lead to osteoarthropathy, which seriously affects the knee joint. Function, resulting in limited daily activities of patients, and gradually lead to a decline in self-care ability and loss of self-confidence. [0003] Absorbable interface screws or bone compression nails are used to fix the tendon graft in ACL rupture surgery, but the cutting operation of the tendon graft by the absorbable interface screw further affects the tensile strength of the tendon and the...

AI Technical Summary

Problems solved by technology

[0002] The anterior cruciate ligament is one of the main devices to maintain the stability of the knee joint. If the injury or rupture of the anterior cruciate ligament is not treated properly, it will lead to instability of the knee joint, secondary articular cartilage damage, and eventually lead to osteoarthropathy, which seriously affects the knee joint. Function, resulting in limited daily activities of the patient, and gradually lead to a decline in ...

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