Abstract: Green tea becomes one of the most popular beverages consumed worldwide, because of its many scientifically proven advantageous effects on human health it has gained attention in recent years . which is also rich in healthpromoting flavonoids account 30% of the dry weight of a leaf, includes catechins and their derivatives. Several studies has proved that green tea catechins, such as epigallocatechin gallate, prevent growth of periodontal pathogens and decrease the destruction of periodontal tissue.