Fig.1 Mr. Zhang cares about his teeth.  He uses mouth rinse after every meal and brushes a lot.  But his teeth are stained heavily, particularly between the teeth (1) and in the neck area of the teeth (near the gum line, 2).  In contrast, the body of individual teeth is without much stain (3).  Return to main article

Xin Wei, DDS, PhD, MS 1st edition 11/2/2011, last revision 11/27/2011