association of vitamin d supplementation and periodontitis in iranian adults: a case-control study

Background and objectives: vitamin d may include a role in periodontal health. this study aimed to assess association of vitamin d supplement intake and periodontitis in iranian adults.materials and methods: this was a case-control study comprising 150 participants aged 35–44 years from the two sexes, who were non-smokers, non-diabetics and enquirers of dental treatment at a dental public health center. first, condition of periodontium was assessed using clinical attachment loss, probing depth, bleeding on probing and plaque index. participants were grouped to normal (n1 = 75) and chronic periodontitis (n2 = 75) groups. data on tooth brushing and flossing, body weight and height, history of periodontal treatment, regular dental visits, insurance status and regular vitamin d supplementation in past 3 y were collected using questionnaires. chi square, t-student test and logistic regression were used for statistical analyses.results: those who had regular vitamin d intake, experienced periodontitis less than those who did not (78.7% against 33.3%, p-value < 0.0001). results of logistic regression analysis showed that after adjusting for all assessed variables, not taking vitamin d supplements (or = 5.33) and brushing less than once a day (or = 8.01) variables were independently associated to the development of periodontitis.conclusions: these results have shown that regular intake of vitamin d is independently linked to the periodontal health in adults.