Fig. 1From: Patient-specific drill template for C2 transoral pedicle insertion in complete reduction of atlantoaxial dislocation: cadaveric efficacy and accuracy assessmentsCalculation of the centroid of the cross section at the midpoint of the pedicle of C2. a The midpoint and corresponding cross section of each pedicle were determined. b The centroid was calculated with the contour of the cross section at the midpoint of the pedicleBack to article page