Osteochondral defects
Definition
Defect of cartilage +/bone
Typically on talus
Options
osteochondral
Ankle osteochondral lesions
Definition
Fracture talus through articular cartilage into subchondral bone
- 2° force transmitted from distal tibia
Osteochondritis dissecans v osteochondral fracture
Epidemiology
6% ankle sprains
Average age = 25
M > F
Location
Freiberg's
Definition
Crushing osteochondritis of metatarsal head
Epidemiology
Usually 2nd metatarsal (80%)
- occasionally third
- can occur in any
Age 10-15 years
- peak 15 year old girls
- F:M = 3:1
- occurs during the growth spurt at puberty
Bilateral in 6%
Aetiology