Internal versus external femorotibial rotation an anterior cruciate ligament rupture and patellofemoral instability on preoperative standing radiographs.
BACKGROUND Previous literature has identified non-modifiable risk factors for anterior cruciate ligament (ACL) rupture and patellofemoral instability (PFI), such as sex, joint laxity, tibial slope, variations in the intercondylar notch, patella alta, trochlear dysplasia, distance from the tibial tubercle to the trochle...