RT Journal Article SR Electronic T1 Dental Hygiene Research Center Old Dominion University JF American Dental Hygienists Association JO J Dent Hyg FD American Dental Hygienists Association SP 48 OP 48 VO 81 IS 2 A1 McCombs, Gayle YR 2007 UL http://jdh.adha.org/content/81/2/48.abstract AB