Mazdarani et al: Effect of center of rotation of angulation‐based leveling osteotomy on ex vivo stifle joint stability following cranial cruciate ligament transection and medial meniscal release with and without a hamstring load
Veterinary Surgery 6, 2022

🔍 Key Findings

• CBLO reduced tibial plateau angle (TPA) from a mean of 28.1° to 9.7°, aligning with its goal of flattening the tibial slope.
• CBLO eliminated cranial tibial translation (CTT) following CCL transection and meniscal release at all angles except 140° without hamstring load.
• Hamstring loading (20% quadriceps load) significantly reduced or delayed the onset of CTT, improving stifle stability.
• Medial meniscus was confirmed as a secondary stabilizer; its release (MMR) caused more CTT than CCLx alone.
• PTA (patellar tendon angle) increased with joint extension; CBLO shifted the PTA curve lower and parallel to intact values, suggesting effective flexion of the joint.
• Combined CBLO and hamstring loading resulted in the most stable joints, especially from 50° to 135° joint angles.
• Residual CTT occurred in CBLO-only limbs at higher extension angles (e.g., 140°), but hamstring load mitigated this.
• Stifle stability post-CBLO is multifactorial, depending on joint angle, meniscal integrity, and hamstring activation.