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.
Over time, this inflammation can lead to progressive gum disease, which can have serious consequences if left untreated. The mildest form of gum disease is called gingivitis. This is the initial stages of gum inflammation caused by the presence of plaque and tartar on the teeth.