Spinal column supporting rod is made from malleable metal alloy with elongation at rupture in traction tests of over 20 per cent

摘要

The supporting rod (7), connected to spinal column vertebrae by screws (3) or hooks (4), is made from a malleable metal alloy with an elongation at rupture in traction tests of over 20 per cent. The alloy can be over-hardened and based on stainless steel, or a grade 2 titaniumbased alloy. The rod is bent to the required shape before fixing to the spine.