One serious situation that can occur within joints is the loss of the vital internal lubrication between the parts. Joints essentially operate as living hinges and rely on the moving parts being able to smoothly slide past each other. When this lucubration is missing, damage occurs at the points of contact. Some patients describe this as a “bone on bone” sensation. Viscosupplementation therapy uses a specialized and natural joint replacement fluid called hyaluronan. By reintroducing lubricating fluid into the joint, smoother operation is often the result. This then allows the joint to begin to heal itself, naturally. There are very few if any side effects from hyaluronan as it is virtually identical to the original joint fluid.