Rheology of hyaluronic acid and dynamic facial rejuvenation: Topographical specificities.

Sound knowledge of the rheology of hyaluronic acids is fundamental for facial rejuvenation procedures. Hyaluronic acid implants are subjected to complex mechanical forces within the facial tissues that vary depending on the anatomical region. Analysis of these forces is important to establish the rheological specifications of hyaluronic acid implants in each specific zone. This approach will optimize the correction of age-related loss of volume, since the filler will be chosen as a function of the mechanics of the anatomical zone, with the objective to respect facial dynamics.