Viscosupplements, include Hyalgan, Orthovisc, Supartz, and Synvisc.  These types of injections deliver Sodium Hyaluron, a natural component within the knee, directly into the knee joint via injection to cushion and lubricate the knee joint.

Though intended for use in the knee, viscosupplementation may be trialed in other joints including the shoulder, ankle, and hip.