Torn or frayed ligaments and torn cartilage are removed at surgery, normal structures are left intact. The TPLO is based on the premise that abnormally steep slope of the tibial plateau puts abnormal stress on the cruciate ligaments hence they stretch, fray, and/or tear. Correcting the slope of the tibial plateau allows the normal ligaments to function as they should. There is no attempt to stabilize the joint as biomechanically that is unnecessary.

