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.
A: Pain in the gums from eating usually comes from a condition called stomatitis, in which inflammation and soreness occurs in the mouth, specifically with gum disease. In many cases, gum disease starts as gingivitis and then progresses to periodontal disease, but other factors may contribute to soreness in the gums, notes WebMD.