System used to describe distal tibial fracture through epiphysis in children. Group 1, no involvement of epiphysis; group 1a, fracture and lateral separation of distal fibula (abduction mechanism); group 1b, fracture and posterior separation of metaphysis fragment (hyperplantar flexion/supination mechanism); group 1c, fracture of anteromedial tibial metaphysis with posterior displacement (external rotation/supination mechanism); group 1d, fracture of tibial metaphysis posteromedially and distal fibular shaft fracture with medial displacement (adduction mechanism); group 2, epiphyseal fracture with displacement of vertical lateral fragment; group 3, combinatiion of Salter type 4 fracture with Salter type 1 or 2 (adduction mechanism).