Congenital atlantoaxial dislocation: a dynamic process and role of facets in irreducibility

Object Patient age at presentation with congenital atlantoaxial dislocation (CAAD) is variable. In addition, the factors determining irreducibility or reducibility in these patients remain unclear. The facets appear to contribute to the stability of the joint, albeit to an unknown extent. The objective of this paper was to study the characteristics of C1–2 facets in these patients and their bearing on the clinicoradiological presentation and...