Types of Viscosupplementation Injections SNS Rheumatology A gel injection for the knee helps improve joint lubrication when natural synovial fluid becomes thinner or less effective, which often happens with arthritis., This gel acts as a cushion and Knee Gel Injections Brands Beauty Dermal Knee Gel Injections Side Effects Risks & Safety Guide Gel injections help cushion and lubricate the knee jointespecially useful for patients with osteoarthritis or cartilage wear. By improving joint movement and reducing friction, these injections help relieve pain, delay more invasive Knee Gel Injections for Cartilage Damage: HA vs. ChondroFiller