[Correlation study on polymorphisms of vitamin D receptor gene in patients with periodontitis]

To investigate the relationship between vitamin D receptor (VDR) gene polymorphisms and periodontitis.

Ninety patients with aggressive periodontitis(AgP), 34 patients with chronic periodontitis and 91 healthy controls were recruited in this study. VDR gene was analyzed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) with Taq I restriction endonuclease.

The detection frequency of Tt genotype was higher in the aggressive periodontitis patients than in the healthy controls (16.7% vs 7.7%, P>0.05). The difference between the female aggressive periodontitis patients and healthy controls (20.8% vs 4.2%, P<0.05) was statistically significant, but no difference was found between the male patients and controls (10.8% vs 11.6%, P>0.05). There was a strong association between aggressive periodontitis and Tt genotype in females (AgP patients vs healthy controls, OR=6.02). The detection frequency of Taq I ER-alpha genotypes was not statistically different between the chronic periodontitis patients and healthy controls.

In female Han Chinese population, the Tt VDR genotype may be associated with aggressive periodontitis.