Tibial Tuberosity Advancement (TTA)

Tibial Tuberosity Advancement (TTA) is a surgery performed on dogs to stabilise the stifle joint after rupture of the cranial cruciate ligament. During TTA the tibial tuberosity is advanced, which changes the angle of the patellar ligament to neutralise the tibiofemoral shear force during weight bearing. A titanium cage is used to advance the tibial tuberosity and a titanium plate is used to hold the tibial tuberosity in position. By neutralising the shear forces in the stifle caused by a ruptured or weakened CrCL, the joint becomes more stable without compromising joint congruency.