An implantation system for treatment of a defective curvature of the spinal column comprises an elongated element, a first bone fixation element being fixedly attached to said elongated element, a second bone fixation element, and guiding structure through which the second bone fixation element is slidably and contactingly connected to the elongated element. The elongated element has bending resilience and/or torsional resilience for applying corrective force action to the spinal column. A special arrangement of the guiding structure provides automatical adjustment of the corrective force action in dependence of growth of the spinal column. The system allows for good flexibility of the spine and for a natural healthy growth of the spine, while it avoids re-operations and implant adjustments.
