Morphometric characteristics c1-c2 vertebrae to perform anterior transarticular crossing screw fixation

Abstract

Preoperatively, performing a calculation of the possible screw angles, screw entry point, and screw length based on CT multiplanar reconstruction images for ATAS is a safe and applicable method. In cases in which ATAS fixation across the atlantoaxial joint procedure should be performed without performing a measurement, a screw angle not more than 41.18°±4.49° on the coronal plane does not damage the vertebral artery. Furthermore, using screws shorter than 28.46±3.60 mm doesn"t purchase the atlantoaxial joint.