classification
0 - erythema, warmth, oedema - limited soft tissue volumen, early joint space widening/narrowing, 0-1 months
1 - acute inflammation (can be confused with infection) - demineralisation of regional bone, periarticular fragmentation, dislocation of joint 2-3 months
2 - less infammation, increase stablity of fracture site - absorption of debris in soft tissues, early healing of fracture fragments, periosteal new bone formation 3-6 months
3- permanent enlargement of foot and ankle, fixed deformity , minimum daily swelling activity related swelling, normalisation of skin temperature - smoothing edge of large fragments, sclerosis, osseous, fibrous ankylosis - 6-9 months