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).
The gum is then pulled over or down to cover the exposed root and sewn into place. This procedure can only be done in people who have plenty of gum tissue near the tooth. Some dentists and patients prefer to use graft material from a tissue bank instead of from the roof of the mouth.