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.
One of the most common causes of bleeding gums is gum disease, also called gingivitis or periodontitis (periodontal disease). Gum disease can cause the gums to bleed while eating, randomly during the day, or after brushing or flossing the teeth. Other causes are more related to lifestyle choices, such as following an unhealthy diet, which reduces the amount of nutrition that oral health needs.