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 is an inflammation of the gums, usually caused by a bacterial infection. If left untreated, it can become a more serious infection known as periodontitis. Gingivitis and periodontitis are major causes of tooth loss in adults, according to the American Dental Association.our gums actually attach to the teeth at a lower point than the gum edges that we see. This forms a small space called a sulcus. Food can get trapped in this space and cause a gum infection or gingivitis. Plaque is a thin film of bacteria. It constantly forms on the surface of your teeth.