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Fig. 1 | BMC Surgery

Fig. 1

From: Three-dimensional reduction method with a modified C2 isthmus screw in irreducible atlantoaxial dislocation: a technical note

Fig. 1

a C1 PS and C2 PS, with anteroposterior distance is too short to draw the C1 posteriorly. b C1 LMS and C2 PS, with vertical distance is too short to manipulate reduction for the vertical distraction. Cd C1 PS or LMS combined with modified C2 isthmus screw, with anteroposterior and vertical distance are both increased, which is benefit for the reduction. LMS lateral mass screw; PS pedicle screw

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