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).
A gum graft may be necessary to protect your teeth from the damaging effects of gum recession, or you may choose to have one to improve the appearance of your smile. Gum recession is the process in which the tissue that surrounds the teeth pulls away from a tooth, exposing more of the tooth or the tooth 's root. Similar to a connective-tissue graft, free gingival grafts involve the use of tissue from the roof of the mouth. 2  But instead of making a flap and removing tissue under the top layer of flesh, a small amount of tissue is removed directly from the roof of the mouth and then attached to the gum area being treated.