The effect of Tibial Tuberosity Advancement on Patellar tendon force in Canine Stifle Joint under Caudal Femoral Drawer

The Tibial Tuberosity Advancement (TTA) surgical technique is used in veterinary surgery to limit cranial tibial translation during canine gait, lengthening the lever arm of quadriceps Anterior Cruciate Ligament-deficient (ACL-deficient) stifle joints. It know that after TTA, patellofemoral pressure decreases, but Patellar Tendon (PT) behavior has not been observed experimentally yet. This study measures PT force under caudal femoral drawer at knee flexion angles from 135° 90° intact and pathological asses effect TTA on tendon. Five fresh cadaveric adult joint were tested an apparatus which muscle forces hind limb simulated. Each was three different conditions: intact, ACL-deficient with TTA. measured using a electrical transducer. greater angles, force. average five specimens 90º 28.4 ± 3.2 Newtons (N) for 28.2 3.4 N 24.9 2 knee, decreased compared healthy so generates loosening showed fast rate change operated because shift pattern flexion, biomechanics entire could be influenced by technique.