The anterior cruciate ligament (CCL), also known as the anterior cruciate ligament, is located in the knee joint. It originates from the medial side of the lateral condyle of the femur anterior and inferior, and inserts into the medial intercondylar spine of the tibial plateau. Its function is to limit the knee joint. Hyperextension, and anterior overdisplacement of the tibia.
The anterior cruciate ligament plays an important role in stabilizing the knee joint. If the anterior cruciate ligament injury cannot be treated in time, it will endanger the pet's knee joint function, and may develop into secondary degenerative arthritis.

TPLO (tibial plateau level orthopedics, referred to as TPLO) is recognized as an effective treatment in small animal orthopaedics. TPLO Plate was first designed by Slocum in 1993 to deal with knee instability due to anterior cruciate ligament rupture. It is to move the tibial plateau to the posterior-distal direction, thereby reducing the shear force of the anterior cruciate ligament muster during weight-bearing, and also to ease the forward thrust of the tibia.
During the operation, by rotating the tibial plateau to achieve the ideal angle, the mechanical structure of the knee joint is changed to reduce the pain and instability of the knee joint.