It is safe medical procedure for degenerative changes of joints, especially knee osteoarthritis. Its main goal is to resupply Viscosuplementation – key component of joint fluid in healthy joints, to facilitate better knee movement. Extender joint injections condition joint fluid and relief pain. There are many different type of synthetic equivalent of Viscosuplementation subject to concentration and density and dosed 3 up to 5 injections spaced 1 week apart shall improve live comfort and enable to be back to physical daily activities. Positive treatments results are noticeable after few weeks, but to make effect sustained it is recommended to repeat treatment each 6 month or each year.