Biophysical Characteristics of Hyaluronic Acid Soft-Tissue Fillers and Their Relevance to Aesthetic Applications

Background: The purpose of this study was to present new rheologic data for hyaluronic acid filler products, correlate them with recent tissue integration studies, and provide a scientific rationale for selecting appropriate products for volume replacement within different tissue levels and anatomical zones. A brief overview of the methodology of filler rheology studies and data analysis is provided. Methods: Seven U.S. Food and Drug...