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).
As a result,  many dentists prefer to proactively stunt this resorption by using  a bone graft as covered in dental procedure code D7953. Bone grafts  can be used immediately after an extraction or months or years  after the loss of a tooth. This procedure is also commonly referred  to as socket preservation..