Hyaluronic acid (HA)is a naturally occurring acid in your skin. It gives your skin volume and keeps it hydrated. With age, your body stops making hyaluronic acid. Results from HA injections usually last six months to a year.
Calcium hydroxylapatite (CaHA) is a type of filler that consists of a substance you have in your bones. Results from these fillers typically last around a year. Healthcare providers usually use CaHA fillers for deeper wrinkles.
Poly-L-lactic acid (PLLA) is a substance that helps your body create its own collagen. Healthcare providers usually use poly-L-lactic acid to smooth deep wrinkles on your face. The results can last two years or more.
Polymethylmethacrylate (PMMA) fillers consist of collagen and very small balls that stay under your skin after your healthcare provider injects them. The balls give your skin volume and keep it firm.