Used to restore lost volume and smooth out lines dermal fillers are a popular way to rejuvenate the face and hands they are gel like substances that are injected into different areas to smooth lines wrinkles and deeper folds they can also be used to restore volume where tissues have degenerated with age or where fat loss has caused cheeks to collapse fillers are can also be used to fill in pockmarks and acne scars contour or reshape facial features add volume to lips and cheeks resh