C2 Laminar screw—screw assembly for the cranio-cervical junction

Atlantoaxial dislocation is a common disorder of the upper cervical spine that often requires surgical treatment. The primary treatment methods include transoral release and fixation, as well as posterior screw-rod fixation. When patients have anatomical variations in the atlas and axis, the difficulty of screw placement is significantly increased. Therefore, we have adopted a new laminar screw-screw fixation technique to replace the traditional C2 screw fixation. This method has been used to treat atlantoaxial dislocation.