Osteoarthritis

picture:   Normal join       vs.       osteoarthritis

Occurs due to mechanical wear and tear ========>
---destruction of articular cartilage and subchondral cysts
---sclerosis
---osteophytes (bone spurs)
---eburnation (polished bone)
---Heberden's nodes (DIP)

---Bourchard's nodes (PIP)

Risk Factors:
1) age
2) obesity
3)  joint deformity

Symptoms:

PAIN in weight-bearing joints after prolonged use, that improves by the REST.

Disease is NONinflammatory.

No systemic symptoms.