An air pollutant is a substance in the air that can have adverse effects on humans and the ecosystem. The substance can be solid particles, liquid droplets, or gases. A pollutant can be of natural origin or man-made. Pollutants are classified as primary or secondary.
How is gum graft surgery performed? During gum grafting surgery, a periodontist will commonly take connective tissue from the roof of the mouth (palate) and suture it to the affected gumline. This allows more tissue to grow and close the exposed root surface (gum recession).
Facial lipoatrophy is the loss of fat beneath the skin, which can result in sunken cheeks, indentations, and hollow eyes. Lipoatrophy is common among HIV patients. Sculptra is a synthetic and biocompatible material that is injected below the surface of the skin in the area of fat loss.