Dry Mouth: Causes, Symptoms, and Treatment
Dry mouth is a condition in which the mouth has little or no saliva. The effects of a dry mouth go beyond the feeling thirsty -- as it can affect the taste and digestion of foods and drinks. Other symptoms dry mouth are cracked lips, the mouth feels tight and dry, sores in the corners of the mouth, and difficulty swallowing.
Read more here http://www.webmd.com/oral-health/ss/slideshow-dry-mouth

Dentists and other medical practitioners have issued warnings to people following a DIY whitening procedure that makes use of charcoal-derived mixture on teeth.
Research carried out at the National Institute of Dental and Craniofacial Research (NIDCR) found that baby teeth contain valuable stem cells that have the potential to turn into just about any type of cell.