In figure 1 above, the more electronegative Oxygen atoms pull electron density towards themselves as demonstrated by the arrows. Carbon Dioxide is not polar however because of its linear geometry. A molecule's overall dipole is directional, and is given by the vector sum of the dipoles between the atoms.
There are a number of factors that can cause your gums to recede, including: 1  Periodontal diseases. 2  These are bacterial gum infections that destroy gum tissue and supporting bone that hold your teeth in place. 3  Gum disease is the main cause of gum recession.
Gingivitis. Gingivitis is the most common cause of swollen gums. It is a gum disease that causes your gums to become irritated and swollen. Many people have gingivitis and donât know it because the symptoms can be quite mild.nfection. Infections caused by fungi and viruses can potentially cause swollen gums. If you have herpes, it could lead to a condition called acute herpetic gingivostomatitis, which causes swollen gums. Thrush, which is the result of an overgrowth of naturally occurring yeast in the mouth, can also cause gum swelling.