Developed by Dr. Slocum in Eugene, Oregon, (he is not board certified) after having the medial meniscus inspected for damage. The tibial plateau, including the joint surface, is then rotated from its backward sloping postion to a level position. This is done by an oscillating curved bone saw blade, rotating the cut portion, and placing a bone plate to hold the rotated portion in its new orientation while the bone heals. This change in geometry leads to redistribution of forces in the joint which neutralizes cranial tibial thrust. Therefore, the joint, does not depend on the CrCL for stability, replacing the ligament is now unnecessary.
Developed by Dr. Tepic in Zurch Switzerland (who is not board certified). The TTA is a dynamic technique. It is the state-of-the-art bio-mechanical study of the canine stifle joint. With TTA, the tibial tuberosity is cut and then advanced forward leading to redirection of the straight patellar ligament. This change in Geometry results in redistribution of the forces within the stifle joint, cranial tibial thrust is neutralized and replacement of the torn CrCL is unnecessary.
Developed by Dr. W. Bruce in Australia (who is not board certified) TTO is the newest of the dynamic stabilization techniques. Similar to TPLO and TTA, it involves cutting and rearranging bone in the vicinity of the top or the tibia in order to effect a bio-mechanical change in the CrCL-deficient limb to eliminate cranial tibial thrust and provide stability without replacing the torn ligament. This newest technique, in theory, makes use of the positive aspects of both the TPLO and TTA while better controlling the possible draw backs.