PT - JOURNAL ARTICLE ED - , TI - CE Questions DP - 2009 Jan 01 TA - American Dental Hygienists Association PG - 12--13 VI - 83 IP - suppl 1 4099 - http://jdh.adha.org/content/83/suppl_1/12.short 4100 - http://jdh.adha.org/content/83/suppl_1/12.full SO - J Dent Hyg2009 Jan 01; 83