hyaluronic acid is a naturally occurring molecule and is most abundant in the skin. in the human body, ha, among other functions, is important for filling spaces, maintaining the hydration and lubrication of the skin, as well as stimulating fibroblasts (cells that form connective tissues) for collagen development. however, natural ha degrades relatively quickly in the human body, only lasting approximately 24 hours. on the other hand, ha dermal fillers, produced by bacterial fermentation, have undergone a process that reduces the speed at which they breakdown. in fact, injectable dermal fillers can last a few months to a year, or longer.
fifty-three-year-old woman before and after treatment following md codes. (springerlink)
while the elastic and hydrating quality of ha fillers gives them a gel-like quality, individual filler products differ on the degree of stiffness and cohesiveness. the variation in the type of filler is necessary in order to achieve the differing desired outcomes typically related to volumizing, lifting, contouring, and boosting the skin, as well as texture improvement. in other words, filler products are adapted to address specific concerns.
in addition, the outcome is highly influenced by the approach to the face, anatomical location and the injecting technique. one approach to facial ha dermal fillers is known as the
“md codes” developed by dr. mauricio de maio
, which is a set of guidelines to follow when injecting ha. this methodological and systematic approach takes into account emotional messages, facial shape, anatomical landmarks, type of product, and location to be placed while using a universal language of codes. but there are many excellent approaches to optimizing the natural appearance of facial aesthetic outcomes, and not every patient will benefit from the same approach.