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. 2018 Nov 1;11:1179544118809050. doi: 10.1177/1179544118809050

Table 2.

Watson-Jones classification of tibial tubercle avulsion fractures.

Type 1 Avulsion of the apophysis without injury to the tibial epiphysis
2 Epiphysis is lifted cephalad and incompletely fractured
3 Displacement of the proximal base of the epiphysis with the fracture line extending in the joint