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Teaching point: In atlanto-axial rotatory fixation, CT in neutral position typically shows rotation of C1 on C2. Upon head rotation, atlas and axis rotate as one unit.
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... In such cases, it is reasonable to release the associated facet joints and reduce them with subsequent external or internal fixation [7][8][9][10]. A combination of factors contribute to underdiagnosis of AARF including its low incidence, normal neurological function on clinical presentation, and the diagnosis is often missed on standard radiographs due to the irregular positioning of bony structures [11][12][13][14][15][16][17][18][19]. As such, the goal of this systematic review is to comprehensively synthesize the literature to date on management strategies and treatment outcomes of AARF to provide a current, evidence-based overview of the present body of knowledge. ...
Atlantoaxial rotatory fixation (AARF) in adults is a rare and clinically challenging condition characterized by a spectrum of etiological factors, predominantly attributed to traumatic and inflammatory pathologies within the craniovertebral region. Trauma is the most frequently identified cause within the adult population, with the first case report published in 1907. This study aims to conduct a systematic review that addresses the clinical presentations and management strategies relating to traumatic atlantoaxial rotatory fixation in adults. A comprehensive search of the PubMed database was executed, adhering to the PRISMA guidelines. The inclusion criteria encompassed case reports and series documenting AARF cases in individuals aged 18 and above, spanning database inception to July 2022. Studies not published in the English language were excluded. A total of 61 articles reporting cases of AARF in the adult population were included in the study. The mean age of affected individuals was 36.1 years (± 15.6), with a distribution of 46% females and 54% males. Predominant mechanisms of injury included motor vehicle accidents and falls, constituting 38% and 22% of cases, respectively. Among the classification systems employed, Fielding and Hawkins type I accounted for the majority at 63%, followed by type II at 10%, and type III at 4%. Conservative management was used for treatment in 65% of acute (65%) cases and 29% of chronic cases. Traumatic AARF is a rare phenomenon in the adult population, is more common in younger adults, and does not often present with neurologic deficits. Patients diagnosed acutely are more likely to be successfully treated with conservative management, while patients diagnosed chronically are less likely to be reduced with conservatively and often require surgical treatment. Surgery should be considered for patients with irreducible dislocations, ligamentous injuries, unstable associated fractures, and persistent pain resistant to conservative management.
