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.
Some people are more prone to the inflammatory causes of receding gums. Thinner gum tissue makes inflammation caused by plaque more likely. The gums are more delicate in some people. Periodontal disease is a common cause of gum recession. Periodontal disease causes the loss of the supporting bone around a tooth through an inflammatory reaction. The gum recession tends to affect all the teeth in a similar way.