CosmoDerm® and CosmoPlast® are injected just below the surface of the skin, filling in unwanted lines and wrinkles and adding definition to the lip border. They can be used to fill in worry lines on the forehead, frown lines between the eyes, crow's feet, smile lines and acne scars, to define the lip border and to minimize deep creases on the side of the mouth. Say Goodbye To Frown Lines. CosmoDerm® can fill in the worry lines on your forehead and the frown lines between your eyebrows.