Knees and hips are very importants parts of the musculoskeletal system which include:
- Bones (the skeleton);
Osteoarthritis or osteoarthrosis is a widespread disease that affects millions of people around the world (men and women). It occurs mainly in people between the ages of 40 and 50 years. It is characterized by pain, stiffness, and functional loss. Furthermore, it results from the decay of the cartilage that covers the ends of the bones at the joints.
It is important to mention that Osteoarthritis differ from Rheumatoid arthritis. Indeed, Osteoarthrosis occurs when the cartilage joint surface wears out, and it begins in an isolated joint. Rheumatoid arthritis is an autoimmune disease, in which the immune system attacks the body's tissue instead of invaders.