When a device (rod) is attached by hooks or screws to the spine at each end of the device and to at least one other point of the spine along the device, this is called:

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Segmental instrumentation refers to the method of attaching a device to the spine at multiple points along its length, providing support and alignment by connecting to the spine at each end and at least one other point in between.

When a Device (Rod) Is Attached by Hooks or Screws