... I, and Fok I VDR polymorphisms VDR, vitamin D receptor; SD, standard deviation Table 3. Genotype and allele frequencies of Apa I, Bsm I, and Fok I VDR polymorphisms in subjects with and without ... confirmed on periodontitis. We assessed the relationship between ApaI, BsmI, and FokI VDR polymorphisms and the risk of severe chronic periodontitis among Japanese adult men. Materials and Methods: ... diabetes VDR, vitamin D receptor; OR, odds ratio; CI, confidence interval 4. DISCUSSION We examined the relationship between ApaI, BsmI, and FokI VDR polymorphisms and severe chronic periodontitis...