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. 1996 May;23(5):831-4.

Pathogenetic mechanism and prevalence of the stable atlantoaxial subluxation in rheumatoid arthritis

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  • PMID: 8724293

Pathogenetic mechanism and prevalence of the stable atlantoaxial subluxation in rheumatoid arthritis

M Kauppi et al. J Rheumatol. 1996 May.

Abstract

Objective: To study the pathogenetic mechanisms responsible for and prevalence of stable atlantoaxial subluxation (AAS).

Methods: Lateral view cervical spine radiographs during flexion and extension were studied in 262 patients with rheumatoid arthritis (RA).

Results: AAS was found in 130 patients, 42 (32%) of whom had a stable deformity; in a population based subseries, stable AAS was seen in 16% of the patients with ASS. Atlantoaxial impaction (AAI) was diagnosed in 98 cases and in 37 (88%) of the 42 patients with stable AAS.

Conclusion: The main cause of the spontaneous stabilization and occasional ankylosis of the atlantoaxial area is the development of erosions and collapse in the lateral facet joints leading to AAI.

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