atlantoaxial instability

Atlantoaxial Instability

Definition

 

Loss of ligamentous stability between atlas and axis

 

Spectrum of conditions

1.  Subluxation AP / insufficiency transverse ligament

2.  Rotatory / insufficiency apical ligament

 

Epidemiology

 

Most common older children and adolescents

 

Aetiology

 

Primary

 

Secondary to laxity of transverse ligament

- DIAL HOME CS