Proposed guidelines for use of dermal and subdermal fillers.

The great variety of injectable substances for esthetic treatments and their many adverse effects evidence the necessity for agreement among the experts who use such substances. The guidelines to be followed should take into consideration the ideal features of a filler, the criteria of choice (anatomic area, type of imperfection), well established procedures, medical-legal issues (medical charts and informed consent), and typical responses of different anatomic areas.