Table 1.

Modified classification of tibial tuberosity (TT) fractures

Types	TT	Epiphyseal portion (EP)
IA	Fracture minimally displaced	No disruption
IB	Fracture displaced anteriorly and proximally	No disruption
IIA	Fracture at junction of TT and EP	No disruption
IIB	Fracture comminuted and displaced proximally	No disruption
IIIA	Fracture into joint line with EP as composite unit	Disrupted
IIIB	Fracture comminuted and displaced proximally	Disrupted
IV	Fracture extension transversely through proximal tibial physis with displacement of fracture fragment	Disrupted