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.
This occur with blister on gums and can be the result of inflammatory conditions such as gingivitis or periodontitis. Gingivitis occurs when plague buildup on the teeth causes much bacteria to form. The body responds by trying to fight off bacteria, causing gum swelling and inflammation.