1. Ministry of Health and Welfare. Analysis of major diseases and health behavior of Koreans. Seoul: Ministry of Health and Wel-fare;2017. p. 17.
2. Ministry of Health and Welfare. Korean national oral health survey 2012. Seoul: Ministry of Health and Welfare;2013. p. 71–79. 94-97, 122-124, 294-298, 305, 310, 339-340, 354-358, 430-442.
3. Wara-aswapati N, Howell TH, Needleman HL, Karimbux N. Periodontitis in the child and adolescent. ASDC J Dent Child. 1999; 66:167–174. 154.
4. Flemmig TF. Periodontitis. Ann Periodontol. 1999; 4:32–38.
Article
5. Page RC, Offenbacher S, Schroeder HE, Seymour GJ, Kornman KS. Advances in the pathogenesis of periodontitis: summary of developments, clinical implications and future directions. Periodontol 2000. 1997; 14:216–248.
Article
6. White DJ. Dental calculus: recent insights into occurrence, formation, prevention, removal and oral health effects of supragingival and subgingival deposits. Eur J Oral Sci. 1997; 105:508–522.
Article
7. Marsh PD. Dental plaque: biological significance of a biofilm and community life style. J Clin Periodontol. 2005; 32:7–15.
8. Oh TJ, Eber R, Wang HL. Periodontal diseases in the child and adolescent. J Clin Periodontol. 2002; 29:400–410.
Article
9. Bimstein E. Periodontal health and disease in children and adolescents. Pediatr Clin North Am. 1991; 38:1183–1207.
Article
10. Güncü G, Tözüm T, Caglayan F. Effects of endogenous sex hormones on the periodontium–review of literature. Aust Dent J. 2005; 50:138–145.
11. Mascarenhas P, Gapski R, Al Shammari K, Wang HL. Influence of sex hormones on the periodontium. J Clin Periodontol. 2003; 30:671–681.
Article
12. Markou E, Eleana B, Lazaros T, Antonios K. The influence of sex steroid hormones on gingiva of women. Open Dent J. 2009; 3:114–119.
Article
13. Haubek D, Ennibi O-K, Poulsen K, Væth M, Poulsen S, Kilian M. Risk of aggressive periodontitis in adolescent carriers of the JP2 clone of Aggregatibacter (Actinobacillus) actinomycetemcomi-tans in Morocco: a prospective longitudinal cohort study. Lancet. 2008; 371:237–242.
Article
14. Vallejos-Sánchez AA, Medina-Solís CE, Casanova-Rosado JF, Mau-pomé G, Minaya-Sánchez M, Pérez-Olivares S. Caries increment in the permanent dentition of Mexican children in relation to prior caries experience on permanent and primary dentitions. J Dent. 2006; 34:709–715.
Article
15. Kim IJ, Ju HJ, Lee SH, Na JY, Oh HW, Lee HS. Pattern of dental caries in Korean adolescents with a high risk of caries. J Korean Acad Oral Health. 2016; 40:126–132.
Article
16. Kwon MS, Shin JH, Kim JY, Kim S. An Epidemiological study on the dental treatment needs of adolescents in Yangsan. J Korean Acad Pediatr Dent. 2016; 43:354–364.
Article
17. Park SY, Han YJ, Ryu SY. Related factors of preventive behavior experiences toward dental caries and periodontal disease in Korean adolescents. J Korean Soc Dent Hyg. 2016; 16:417–426.
Article
18. World Health Organization. Oral Health Surveys. 5th ed. Geneva: World Health Organization;2000. p. 54–57.
19. Gherunpong S, Tsakos G, Sheiham A. The prevalence and severity of oral impacts on daily performances in Thai primary school children. Health Qual Life Outcomes. 2004; 2:57.
20. Broadbent J, Thomson W, Poulton R. Oral health beliefs in adolescence and oral health in young adulthood. J Dent Res. 2006; 85:339–343.
Article
21. Ministry of Health and Welfare. Advanced analysis of Korean na- tional oral health survey 2010. Seoul: Ministry of Health and Wel-fare;2010. p. 127–143.
22. Kim JB, Choi EG, Moon HS, Kim JB, Kim DK, Lee HS. Oral health statistics. Kim JB, Choi EG, Moon HS, Kim JB, Kim DK, Lee HS, Park DY, editors. Public Dental Health. 5th ed.Seoul: KMS;2009. p. 377–381.
23. Takahashi Y, Kamijyo H, Kawanishi S, Takaesu Y. Prescence and absence of bleeding in association with calculus in segments given code 2 in the CPITN. Community Dent Oral Epidemiol. 1988; 16:109–111.
24. Kim JB. Evaluation of oral health project in Jinju city. Busan: Pusan National University;2015. p. 1–71.
25. Ishikawa J. The Role of Toothbrushing in the Prevention and Treatment of Periodontal Disease: Personal Experience of Both Clinical and Experimental Observation for More than Thirty Years. Adv Dent Res. 1988; 2:204–208.
Article
26. Al-Wahadni A, Linden GJ. The effects of cigarette smoking on the periodontal condition of young Jordanian adults. J Clin Periodontol. 2003; 30:132–137.
Article
27. Vadiakas G, Oulis C, Tsinidou K, Mamai-Homata E, Polychronopou-lou A. Oral hygiene and periodontal status of 12 and 15-year-old Greek adolescents. A national pathfinder survey. Eur Arch Paediatr Dent. 2012; 13:11–20.
Article