Thank you for your excellent query! Osteoarthritis and osteoporosis are completely separate conditions that both involve the bone, and one does not lead to the other. However, drugs called corticosteroids are often used to treat osteoarthritis, and these are known to lead to lower bone mass and possibly osteoporosis. For this reason patients being treated for osteoarthritis may be more likely to develop osteoporosis. If you are taking such medications, talk with your doctor about extra measures you might take to help preserve your bone density.