RT Journal Article SR Electronic T1 Stem Cells and Dentistry JF American Dental Hygienists Association JO J Dent Hyg FD American Dental Hygienists Association SP 173 OP 174 VO 83 IS 4 A1 Jeremy J. Mao YR 2009 UL http://jdh.adha.org/content/83/4/173.abstract AB