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.
PREVENTING PERIODONTAL DISEASE. Periodontal disease, also known as gum disease, is caused when bacteria in plaque (a sticky, colorless film that forms in the mouth) builds up between the gums and teeth. When the bacteria begin to grow, the gums surrounding the tooth can become inflamed.REVENTING PERIODONTAL DISEASE. Periodontal disease, also known as gum disease, is caused when bacteria in plaque (a sticky, colorless film that forms in the mouth) builds up between the gums and teeth. When the bacteria begin to grow, the gums surrounding the tooth can become inflamed.