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).
1 Ideal dental membrane for socket grafting and grafting where primary closure is not possible. 2  Porosity of less than 0.3 microns creates impervious barrier to bacteria.  Use in an open technique results in preservation of soft tissue architecture, preservation of keratinized tissue width, and a non-surgical removal.