Hyaluronic Acid Filler Properties and Rheology
摘要
The hyaluronic acid filler is made by mixing hyaluronic acid (HA) with a crosslinker. HA naturally exists in the human body and is degraded by hyaluronidase. HA is mixed with a crosslinker to prevent enzymatic degradation for a longer duration. This hydrogel is formulated by various manufacturing processes, and the filler rheology can objectively reveal its properties. Rheology can be applied to all materials, from liquids to solids. Understanding filler rheology is important for estimating the longevity of the injected filler. In this chapter, we will discuss the objective parameters to understand the properties of the HA filler.