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.
How to Soothe Red and Inflamed Gums. Red and inflamed gums can occur for a variety of reasons, such as hormonal changes during pregnancy, but it is most often a sign of gingivitis. Gingivitis is a common and mild form of gum disease that is caused by excess plaque and tartar in the gums.