Osteoarthritis (OA), the most common type of arthritis, is a disease of the entire joint, typically involving the cartilage, bone, synovial membrane and ligaments. Cartilage physiology is typically altered and cartilage is eroded at the location where two bones meet, or articulate.

Traditionally, osteoarthritis was thought to be due to normal “wear and tear” of aging, a degenerative disorder for which little could be done. Since the 1980s, research evidence has shifted the focus of thinking, and now there are a variety of treatment options to relieve pain such as NSAIDs, corticosteroids, acetaminophen, joint replacement, and more recently, hyaluronic acid (HA) viscosupplementation.

HA is the natural substance found in the fluid that surrounds a healthy knee joint and helps cushion, lubricate and protect the knee as it moves throughout the day.