What happens when HA is injected into the TMJ space?

Injecting hyaluronic acid (HA) into the temporomandibular joint (TMJ) space is intended to mimic the natural synovial fluid found in healthy joints. Hyaluronic acid plays a crucial role in maintaining joint health due to its viscoelastic properties. When HA is introduced into the joint space, it acts as a lubricant, reducing friction during movement. This improved lubrication helps to cushion the joint, allowing for smoother and more pain-free motion.

Additionally, HA contributes to the overall health of the TMJ by promoting the production of synovial fluid, which is essential for joint function. The cushioning effect provided by the HA helps absorb shocks and can relieve pressure on the joint structures. By enhancing the lubrication and cushioning properties of the TMJ, HA injections can help alleviate symptoms of conditions such as TMJ disorders and osteoarthritis, providing a non-surgical approach to management. Therefore, the role of HA in the TMJ space is fundamentally about improving joint health and functionality through both cushioning and lubrication.