fa Nutrition Nutrition پژوهشي Research <span style="font-size:10pt"><span style="line-height:115%"><span style="tab-stops:409.5pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:11.0pt"><span style="line-height:115%">Background and Objectives: </span></span></b><span class="s2" serif="" style="font-family:UICTFontTextStyleBody,"><span style="font-weight:normal"><span style="font-style:normal"><span style="font-size:12.0pt"><span style="line-height:115%">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.</span></span></span></span></span><span style="font-size:11.0pt"><span style="line-height:115%"></span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:115%"><span style="tab-stops:409.5pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:11.0pt"><span style="line-height:115%">Materials and Methods: </span></span></b><span class="s2" serif="" style="font-family:UICTFontTextStyleBody,"><span style="font-weight:normal"><span style="font-style:normal"><span style="font-size:12.0pt"><span style="line-height:115%">This was a case-control study comprising 150</span></span></span></span></span><span class="apple-converted-space" new="" roman="" style="font-family:" times=""> participants </span><span class="s2" serif="" style="font-family:UICTFontTextStyleBody,"><span style="font-weight:normal"><span style="font-style:normal"><span style="font-size:12.0pt"><span style="line-height:115%">aged 35&ndash;44 years </span></span></span></span></span><span class="apple-converted-space" new="" roman="" style="font-family:" times="">from the two sexes, who were</span><span class="s2" serif="" style="font-family:UICTFontTextStyleBody,"><span style="font-weight:normal"><span style="font-style:normal"><span style="font-size:12.0pt"><span style="line-height:115%"> 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</span></span></span></span></span>&nbsp;<span class="s2" serif="" style="font-family:UICTFontTextStyleBody,"><span style="font-weight:normal"><span style="font-style:normal"><span style="font-size:12.0pt"><span style="line-height:115%">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.</span></span></span></span></span><span style="font-size:11.0pt"><span style="line-height:115%"></span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:115%"><span style="tab-stops:409.5pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:11.0pt"><span style="line-height:115%">Results: </span></span></b><span class="s2" serif="" style="font-family:UICTFontTextStyleBody,"><span style="font-weight:normal"><span style="font-style:normal"><span style="font-size:12.0pt"><span style="line-height:115%">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.</span></span></span></span></span><span style="font-size:11.0pt"><span style="line-height:115%"></span></span></span></span></span></span></span><br> <span style="font-size:10pt"><span style="line-height:115%"><span style="tab-stops:409.5pt"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:11.0pt"><span style="line-height:115%">Conclusions: </span></span></b><span class="s2" serif="" style="font-family:UICTFontTextStyleBody,"><span style="font-weight:normal"><span style="font-style:normal"><span style="font-size:12.0pt"><span style="line-height:115%">These results have shown that regular intake of vitamin D is independently linked to the periodontal health in adults.</span></span></span></span></span><span style="font-size:11.0pt"><span style="line-height:115%"></span></span></span></span></span></span></span> Periodontitis, Tooth brushing, Vitamin D, Supplement 39 44 http://nfsr.sbmu.ac.ir/browse.php?a_code=A-10-1137-1&slc_lang=fa&sid=1 Seyyede Tarannom Maddah 10031947532846006805 10031947532846006805 No Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran Zahra Ghorbani tarmaddah@gmail.com 10031947532846006806 10031947532846006806 Yes Department of Community Oral Health, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Azade Esmaeilnejad 10031947532846006807 10031947532846006807 No Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran