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O-arm(R) Imaging System Coupled with Navigation Guided Posterior Atlantoaxial Screw Fixation in the Patient with Ponticulus Posticus, an Anatomical Variation of Atlas.
Sang Mok Kim, Kyeong Sik Ryu, Hong Jae Lee, Chun Kun Park
Department of Neurosurgery, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea. nsdoc35@catholic.ac.kr
Abstract
Ponticulus posticus is an abnormal bony bridge of posterior arch of atlas. The resulting foramen contains the vertebral artery and has clinical significance in lateral mass screw insertion into the first cervical vertebra. The authors report an atlantoaxial subluxation case showing a ponticulus posticus, which was surgically treated with posterior atlantoaxial screw fixation under the guidance of O-arm(R) imaging system coupled with navigation.
Keywords: Vertebral artery;Atlanto-Axial fusion


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