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.
Bleeding gums can be a sign that you have or are at risk for gum disease. Ongoing gum bleeding may be due to serious medical conditions such as leukemia and bleeding and platelet disorders. The main cause of bleeding gum is the buildup of plaque at the gum line. This will lead to a condition called gingivitis, or inflamed gums. Plaque that is not removed will harden into tartar. This will lead to increased bleeding and a more advanced form of gum and jawbone disease known as periodontitis.