recurrent
Anterior Instability
Epidemiology
Traumatic initial cause in 95%
M:F 2:1
Age of initial dislocation inversely related to recurrence rate
- patients younger than 20 have a redislocation rate of 90%
- between 20 - 40 years, redislocation rate of 60%
- patients > 40 years have a 10% rate of dislocation but a higher rate of cuff tears (up to 40% in patients > 60yrs)
Anatomy & Stability
1. Passive Stabilisers
Chronic lateral ankle instability
Definition
Chronic instability due to rupture of one or more parts of the lateral ligament
Anatomy
Progressive injury
1. Anterolateral capsule
2. ATFL
3. CFL
NHx
Can lead to ankle OA over time