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1. A pedicle screw, comprising:
a head providing a base for attachment of a supporting structure for a spine, said head having a marker, wherein said marker is aligned with a partial non-threaded portion of said pedicle screw, and a shaft comprising: a first threaded shaft portion; a second threaded shaft portion disposed contiguous to said head; and a middle shaft portion disposed between said first threaded shaft portion and said second threaded shaft portion, wherein: said middle shaft portion has a partial non-threaded shaft portion and has a partial threaded shaft portion in which threads of said partial threaded shaft portion extend circumferentially along a longitudinal side portion of said middle shaft portion and wherein said partial threaded shaft portion is on an opposite side of said shaft from said partial non-threaded shaft portion.
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