What is the purpose of hyaluronic acid injection in osteoarthritis?

• A. Visco-supplementation to improve joint lubrication and reduce pain
• B. Cures osteoarthritis
• C. Rebuilds cartilage completely
• D. Reduces systemic inflammation

Answer: (A)

Hyaluronic acid injections provide visco-supplementation to restore the slippery, gel-like quality of synovial fluid in the joint. By boosting viscosity and elasticity, they improve lubrication and shock absorption, which reduces friction between joint surfaces. That friction reduction translates into less pain and better function for many patients with osteoarthritis, especially in the knee.

These injections do not cure osteoarthritis, do not rebuild cartilage, and do not have a systemic anti-inflammatory effect. Any benefit tends to be local to the joint and can vary in duration from months to longer, with a typical course being a series of injections.