Modified trajectory of c2 laminar screw - double bicortical purchase of the inferiorly crossing screw.
The crossing laminar screw fixation might be the most recently developed approach among various fixation techniques for C2. The new construct has stability comparable to transarticular or transpedicular screw fixation without risk of vertebral artery injury. Quantitative anatomical studies about C2 vertebra suggest significant variation in the thickness of C2 lamina as well as cross sectional area of junction of lamina and spinous process. We present an elderly patient who underwent an occipito-cervical stabilization incorporating crossed C2 laminar screw fixation. We preoperatively recognized that she had low profiles of C2 lamina, and thus made a modification of trajectory for the inferiorly crossing screw. We introduce a simple modification of crossing C2 laminar screw technique to improve stability in patients with low laminar profiles.
Rhee
Woo-Tack
WT
Department of Neurosurgery, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea.
You
Seung-Hoon
SH
Jang
Yeon-Gyu
YG
Lee
Sang-Youl
SY