Surgical treatment of atlantoaxial dislocation using a novel posterior atlantoaxial screw–rod fixation system: a retrospective controlled study

A posterior approach with our novel PASR fixation system is safe and effective for the treatment of AAD. Compared with a conventional PASR fixation system, our novel PASR fixation system can simplify the operation and provide a better reduction effect. This novel fixation system is expected to facilitate the procedure of atlantoaxial fixation and achieve reduction of irreducible AAD without release.