TPLO is currently the most common surgery performed to treat canine cranial cruciate ligament (CCL or ACL) injuries. Now in existence for over 30 years, the surgery has proven to be an extremely effective long-term solution for addressing cruciate ligament injury in dogs and returning them to athletic function. Initially created for large-breed, active dogs, TPLO has proven equally effective in small and medium-sized breeds.
One of the important functions of the cruciate ligament is to prevent forward and backward sliding of the tibia, known as drawer motion or tibial thrust. Because a dog walks on four limbs, the normal angle of the stifle joint (knee) places the CCL under constant load. Because of the constant strain, this ligament is very susceptible to injury. Rupture of this ligament can lead to debilitating lameness and progressive osteoarthritis.