loose bodies

Incidence

Young men

Posterior / Anterior 9:1

Aetiology

High velocity injury

- head direction at impact decides direction of dislocation

Anterior Dislocation 

Externally rotated & abducted leg

- flexion = inferior dislocation

Source

OCD

OA - Osteophytes

Meniscus

Symptoms

Pain

Locking

Clicking

Can cause chondral damage

Xray

OA Loose Bodies

Epidemiology

Relatively rare

Average age 50

Men 4:1 Women

Usually dominant arm

Aetiology

Primary

- associated with strenuous manual labour

Secondary

- trauma

- OCD

- synovial chondromatosis

- valgus extension overload / MCL insufficiency

Indication

Diagnostic

Pain / Stiffness / Locking

Instability

- exclude OCD

Assess syndesmosis

Therapeutic

Synovitis

Osseous lesions / Tibiotalar impingement spurs

Osteochondral defects