INTERVERTEBRAL EXPANDABLE CAGE SYSTEM AND ITS INSTRUMENT

摘要

The invention comprises of an expandable cage (1), a hollow shaft (2) with graft holes (2.4) on it, which is placed into the expandable cage (1) in parallel with expandable cage (1) axis and an instrument specifically designed for this system which is developed for the treatment of diseases on thoracic and lumbar spine and especially to maintain the distance between two vertebras on the spine and achieve fusion. The invention relates especially to the sitting of the shaft (2) into the shaft fixation sockets by turning it properly in full angle within the cage (1), with the help of the instrument and in this way fixing the system between the two vertebras by expanding the upper arm (1.1) and lower arm (1.2) of the expandable cage (1) in opposite directions.