Dermal fillers are injectable substances that help restore volume, smooth out wrinkles, and enhance facial contours by filling in areas of the skin that have lost volume due to aging. Unlike wrinkle relaxers, which target muscles to prevent contractions, dermal fillers work by physically adding volume under the skin to restore structure and smoothness. There are several types of dermal fillers, and they can be made from different materials. We carry some of the leading brands.