Osteoarthritis.

Osteoarthritis is the most common type of arthritis. It is caused by wear and tear on joints over time or by trauma to a joint. Most people with this are older but those who suffer it because of trauma to a joint can be any age.
We have a large section on osteoarthritis. Check out the links below for complete information.

Symptoms	Treatment	Diagnosis	Causes	Prevention
Medications	Hip	Knee	Foot	Resources