Klein A W
Department of Dermatology, University of California Los Angeles School of Medicine, Los Angeles, California, USA.
Dermatol Clin. 2001 Jul;19(3):491-508, ix. doi: 10.1016/s0733-8635(05)70290-4.
Minimally invasive soft tissue augmentation of the face with injectable substances has been performed for more than a century. During this period, many substances have been used to cosmetically improve soft-tissue defects and deficiencies. Some have lasted; most have not. These procedures have become increasingly important as more patients seek aesthetic improvement without major surgical procedures. This article reviews the current status of these materials and techniques.