Many other cytokines gene polymorphisms like tumour necrosis factor-α (TNF-α), HLA- II, nuclear factor kappa β (NF-κβ), Vitamin D receptor, T bet, MMP8, Apolipoprotein E, peroxisome proliferator activated receptor gamma (PPARγ) involved in periodontal disease pathogenesis are also studied in context with periodontal infectogenomics. The gene discussed is PPARG; the disease is periodontal disorder.