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Objective:To evaluate the accuracy of cervical pedicle screw pilot holes placement by bilateral oblique X-ray films with the spiral wires as the guide pin. 目的：探討螺旋形導(dǎo)針配合雙側(cè)斜位X線片判斷頸椎椎弓根螺釘置入孔道準(zhǔn)確性的可行性。