Periodontal disease results from release of inflammatory mediators, and the consequence is a significant breakdown of tooth-supporting tissues, finally leading to tooth loss [16]. IL-12 has multiple biological activities. Early application or production of IL-12 during infection may activate macrophages and augment a host’s cell-mediated immunity while shaping the ultimate antigen-specific immune responses. Successful periodontal therapy results clinically in shallow probing depths and a low tendency towards BOP and microbiologically, in a low detection level of periodontal pathogens [17]. In addition it reduces the size of inflamed lesion and causes a decrease in the periodontal tissues of inflammatory cell subsets, like B cells, T cells and plasma cells [18].