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Definition of Spinal fusion
1. Noun. Correction of an unstable part of the spine by joining two or more vertebrae; usually done surgically but sometimes done by traction or immobilization.
Medical Definition of Spinal fusion
1. A procedure that involves fusing together two or more vertebrae in the spine using either bone grafts or metal rods (Harrington rods). This procedure may be used to correct kyphosis or scoliosis. It is also used in those who require spine stabilisation due to vertebral damage from ruptures discs, fractures, osteomyelitis, osteoarthritis or tumour. (27 Sep 1997)