1. Nunn ME. Understanding the etiology of periodontitis: an overview of periodontal risk factors. Periodontol 2000. 2003; 32:11–23.
Article
2. Palacios C, Joshipura K, Willett W. Nutrition and health: guidelines for dental practitioners. Oral Dis. 2009; 15:369–381.
Article
3. Papas AS, Palmer CA, Rounds MC, Herman J, McGandy RB, Hartz SC, et al. Longitudinal relationships between nutrition and oral health. Ann N Y Acad Sci. 1989; 561:124–142.
Article
4. Melnick SL, Alvarez JO, Navia JM, Cogen RB, Roseman JM. A case-control study of plasma ascorbate and acute necrotizing ulcerative gingivitis. J Dent Res. 1988; 67:855–860.
Article
5. Staudte H, Sigusch BW, Glockmann E. Grapefruit consumption improves vitamin C status in periodontitis patients. Br Dent J. 2005; 199:213–217.
Article
6. Paek KW, Lee SJ. Correlation between vitamin C intake and periodontal disease: The fifth Korea National Health and Nutrition Examination Survey, 2010. J Korea Acad Oral Health. 2014; 38:82–89.
Article
7. Berg RA, Steinmann B, Rennard SI, Crystal RG. Ascorbate deficiency results in decreased collagen production: under-hydroxylation of proline leads to increased intracellular degradation. Arch Biochem Biophys. 1983; 226:681–686.
Article
8. Alfano MC, Miller SA, Drummond JF. Effect of ascorbic acid deficiency on the permeability and collagen biosynthesis of oral mucosal epithelium. Ann N Y Acad Sci. 1975; 258:253–263.
Article
9. Alvares O, Altman LC, Springmeyer S, Ensign W, Jacobson K. The effect of subclinical ascorbate deficiency on periodontal health in nonhuman primates. J Periodontal Res. 1981; 16:628–636.
Article
10. Woolfe SN, Kenney EB, Hume WR, Carranza FA. Relationship of ascorbic acid levels of blood and gingival tissue with response to periodontal therapy. J Clin Periodontol. 1984; 11:159–165.
Article
11. Leggott PJ, Robertson PB, Rothman DL, Murray PA, Jacob RA. The effect of controlled ascorbic acid depletion and supplementation on periodontal health. J Periodontol. 1986; 57:480–485.
Article
12. Amarasena N, Ogawa H, Yoshihara A, Hanada N, Miyazaki H. Serum vitamin C-periodontal relationship in community-dwelling elderly Japanese. J Clin Periodontol. 2005; 32:93–97.
Article
13. Dietrich T, Joshipura KJ, Dawson-Hughes B, Bischoff-Ferrari HA. Association between serum concentrations of 25-hydroxyvitamin D3 and periodontal disease in the US population. Am J Clin Nutr. 2004; 80:108–113.
14. Gaugris S, Heaney RP, Boonen S, Kurth H, Bentkover JD, Sen SS. Vitamin D inadequacy among post-menopausal women: a systematic review. QJM. 2005; 98:667–676.
Article
15. Dietrich T, Nunn M, Dawson-Hughes B, Bischoff-Ferrari HA. Association between serum concentrations of 25-hydroxyvitamin D and gingival inflammation. Am J Clin Nutr. 2005; 82:575–580.
Article
16. McMahon L, Schwartz K, Yilmaz O, Brown E, Ryan LK, Diamond G. Vitamin D-mediated induction of innate immunity in gingival epithelial cells. Infect Immun. 2011; 79:2250–2256.
Article
17. Bae IK, Kwon HJ, Kim IS, Hong HS. Dental biochemistry and nutrition. Seoul: Komoonsa;2015. p. 121.
18. Lee SH, Roh SC. Vitamin D level in blood of menopausal women over 50 and the relation with the proportion requiring dental scaling. J Dent Hyg Sci. 2013; 13:393–402.
19. Ministry of Health and Welfare. Dietary Reference Intakes for Koreans 2015. Sejong: Ministry of Health and Welfare;2015. p. 277–313. 361.
20. Paek KW, Lee SJ, Back JH. A factor of periodontal disease and dietary patterns in Korean adults using data from Korea National Health and Nutrition Examination Survey Ⅴ. J Korea Acad Oral Health. 2015; 39:280–287.
21. Koo SM, Park YJ, Hwang JY. Association between consumption of fruits and vitamin c and generalized periodontitis in Korean adults: the 2007-2010 Korean National Health and Nutrition Examination Surveys. Korean J Dent Mater. 2013; 40:77–85.
22. Nishida M, Grossi SG, Dunford RG, Ho AW, Trevisan M, Genco RJ. Dietary vitamin C and the risk for periodontal disease. J Periodontol. 2000; 71:1215–1223.
Article
23. Lee HJ, Je DI, Won SJ, Paik DI, Bae KH. Association between vitamin D deficiency and periodontal status in current smokers. Community Dent Oral Epidemiol. 2015; 43:471–478.
Article
24. Amano Y, Komiyama K, Makishima M. Vitamin D and periodontal disease. J Oral Sci. 2009; 51:11–20.
Article
25. Miley DD, Garcia MN, Hildebolt CF, Shannon WD, Couture RA, Anderson Spearie CL, et al. Cross-sectional study of vitamin D and calcium supplementation effects on chronic periodontitis. J Peri-odontol. 2009; 80:1433–1439.
Article
26. Garcia MN, Hildebolt CF, Miley DD, Dixon DA, Couture RA, Spearie CL, et al. One-year effects of vitamin D and calcium supplementation on chronic periodontitis. J Periodontol. 2011; 82:25–32.
Article
27. Bashutski JD, Eber RM, Kinney JS, Benavides E, Maitra S, Braun TM, et al. The impact of vitamin D status on periodontal surgery outcomes. J Dent Res. 2011; 90:1007–1012.
Article