Tibial tuberosity
What is normal TTTG?
Several studies suggest that a normal TT-TG distance is 10 mm or less [5, 7, 8]. A TT-TG distance greater than 15 mm in patients with patellofemoral insta- bility may predict limited benefit from phys- ical therapy [7].
How do you measure TTTG?
- bisecting the tibial tuberosity (TT)
- bisecting the trochlear groove sulcus (TG)
- measure the distance between TT and TG = TT-TG distance.
