This is a problem associated with the joints: most commonly the shoulder, stifle (knee), and the tarsus (ankle) of dogs. It is a disturbance in the cell differentiation in the growth plates ( area where the bones elongate) and the cartilage of the joint. The areas in the growth plate fail to mature into bone at a symmetrical rate, leaving an area of thickened cartilage that is not well “cemented” down to the underlying bone. Through normal activity and play this area can crack, sometimes into the joint space. If activity is restricted, sometimes this area of damage can heal. If activity continues and stress is continually applied to the damaged cartilage, a non-healing flap can form.
This problem is painful and inflammed. Treatment may include rest and restricted activity (if diagnosed early) as well as decreasing the amount of calories fed and decreasing the amount of calcium supplemented. Recieving 3 times the recommended calcium in the diet has been shown to result in osteochondrosis. If the dog continues to be lame with rest after 6 months of age, then surgery is usually required. The plan with surgery is to remove the flap which is causing irritation and inflammtion in the joint. It is also important to remove any cartilage that is not adhered to the underlying bone.
Breeds who are at risk:
number on is the labrador retriever and the Rottweiler. But any medium, large or giant breed can be afflicted.
