An evaluation of osteoarthrosis in specific anatomic locations of the canine stifle joint treated with tibial plateau leveling osteotomy and tibial tuberosity advancement.

TPLO and TTA show similar OA progression patterns with effective stress redistribution.

This study compared osteoarthrotic (OA) changes in 55 dogs with cranial cruciate ligament rupture treated with either tibial plateau leveling osteotomy (TPLO) or tibial tuberosity advancement (TTA). Using a 14-location radiographic scoring system (0-3 scale), researchers evaluated OA progression from preoperatively (T0) to 6 months postoperatively (T6). Both surgical techniques demonstrated similar patterns of OA change, with greater progression in caudal tibial plateau, lateral tibial condyle, and lateral femoral condyle regions. Minimal OA changes in other anatomic locations suggested effective joint stress redistribution by both procedures. Subtle differences between techniques included incomplete tibial internal rotation restoration after TPLO and persistent moderate tibial cranial subluxation after TTA. These findings align with existing biomechanical literature. The study indicates both TPLO and TTA effectively stabilize the stifle joint and redistribute forces, though each technique has distinct residual biomechanical effects that may influence long-term outcomes and warrant further investigation.

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