Screw placement of pedicle of vertebral arch--pay great attention to segmental differences of the pedicle.


OBJECTIVE To investigate appropriate ways for screw placement of pedicle of vertebral arch in the horizontal plane. METHODS Fifteen preserved thoracolumbar spine specimens (T(11)-L(5)) were used and divided into three groups at random. Firstly four anatomic parameters indicating screw positions in the horizontal plane were measured. Secondly the methods… (More)


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