Evaluation of Tibial Torsion in Yorkshire Terriers with and without Medial Patellar Luxation

Body weight squared, TTA, and age affect MPL grade, suggestingthatatorsionaldeformitymaycontributetothedevelopmentofMPLinYorkshireterriers along with weight and age.The patella, a sesamoid bone, resides within the tendon ofinsertion of the quadriceps musculature and moves pas-sively with the tendon, changing the direction of pull ofthe quadriceps tendon.