American Manchester Terrier Club
Patellar Luxation (or “loose knees”) is a common condition in dogs, especially small breeds. The dog knee is very similar in structure to the human knee, with the patella (kneecap) sliding in a groove in the femur (thigh bone) within the patellar tendon. Depending on the severity of the condition, when the patella luxates, or slides out of its groove, it may be sudden and painful, or it may become chronic and spend most of its time out on either side of the knee. In small-breed dogs, the patella most often slides medially, or towards the dog’s midline, is usually seen in both knees, and can produce a bow-legged deformity of the rear legs. This medial sliding of the patella puts abnormal forces on the bones and muscles of the leg, causing progressive deterioration of the cartilage in the knee joint and eventual arthritis. These abnormal forces also cause the tibia (calf bone) to rotate inward, further worsening the condition. Read More...
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