Scientists have discovered a way to use it to human advantage. Small, diluted amounts can be directly injected into specific muscles causing controlled weakening of the muscles.
Dermal fillers are substances that are injected just below the surface of the skin to fill in lines, wrinkles, and scars. Unlike face lifts that stretch the skin, fillers add volume for a more natural youthful appearance.
Fillers can also increase the fullness of the lips (see section on lip enhancement) and lessen the downward slant of the corner of lips. The most common areas treated are the smile lines around the nose and mouth, fine lines above the mouth, frown lines between the eyes, and acne scars.
The main permanent dermal filler in use today is silicone. There are a variety of temporary dermal fillers currently in use and several will be discussed below: Hydroxyappetite (Radiesse), hyaluronic acid (Restylane and Hylaform), sculptra, fat, and collagen. Temporary fillers are absorbed by the body over time, usually in 2-6 months and require repeated treatments to maintain the effect.