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 dentist fixing a chipped tooth. A cross section of a tooth. A chipped tooth may cause pain when chewing. Chipped teeth may be treated with porcelain veneers to give someone a more natural look. Dental X-ray. Cosmetic and reconstructive dentists can restore chipped teeth to their original appearance.