Arthrosis is the term given to wear and tear on the joints that either exceeds the extent that would be normal for the patient’s age or occurs as a result of old age. Its cause is ultimately an imbalance between the stress placed on the cartilage surrounding the joint and the body’s ability to replace the worn cartilage.
The reasons for this may include:
excessive strain (sport, profession, being overweight)
congenital or injury-related malposition of the joints
joint damage following accidents