1. 1. Thomson WM, Caspi A, Poulton R, et al. Personality and oral health. Eur J Oral Sci 2011;119(5):366–372. DOI: 10.1111/j.1600-0722.2011.00840.x.
2. 2. Petersen PE, Bourgeois D, Ogawa H, et al. The global burden of oral diseases and risks to oral health. Bull World Health Organ 2005;83(9):661–669. PMID: 16211157.
3. 3. Nazir MA. Prevalence of periodontal disease, its association with systemic diseases and prevention. Int J Health Sci (Qassim) 2017;11(2):72–80. PMID: 28539867
4. 4. https://apps.who.int/iris/bitstream/handle/10665/250796/9789 241549912-eng.pdf;jsessionid=D5A0D24286280D81BCF3C07D2A22745A?sequence=1.
5. 5. Hartnett E, Haber J, Krainovich-Miller B, et al. Oral health in pregnancy. J Obstet Gynaecol Neonatal Nurs 2016;45(4):565–573. DOI: 10.1016/j.jogn.2016.04.005.