1. US history.org(2020).The Electric Ben Franklin.https://www.ushistory.org/franklin/philadelphia/fire.htm(accessed 20 August 2020).
2. Centers for Disease Control and Prevention (CDC)(2020).Basics of oral health.https://www.cdc.gov/oralhealth/basics/index.html(accessed 20 August 2020).
3. (A2) Oral Health and General Health
4. An updated CAMBRA Caries Risk Assessment Tool for ages 0 to 5 years;Featherstone J.D.B.;J. Calif. Dent. Assoc.,2019
5. Caries Management by Risk Assessment (CAMBRA): an update for use in clinical practice for patients aged 6 through adult;Featherstone J.D.B.;J. Calif. Dent. Assoc.,2019