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.
Bacteria in plaque can also irritate your gums, making them inflamed and sore. Plaque is usually easy to remove by brushing and flossing your teeth, but it can harden and form a substance called tartar if it is not removed.s well as poor oral hygiene, a number of things can increase your risk of developing problems with your gums. These include: 1  smoking. 2  your age â gum disease becomes more common as you get older.