Gingivitis and periodontitis common prevention methods are as follows: 1, rinse, brush: master the correct method of brushing, choose the appropriate toothbrush, rinse with water or with 0.9% saline, brush teeth; 2, regular dental cleaning: regular removal of calculus and plaque; 3, change bad habits: such as quit smoking and alcohol, avoid eating stimulating food; 4, pay attention to regular life, improve their immunity; 5, more vegetables, fruits; 6, give the teeth calcium: at a certain age need to supplement calcium elements. The teeth should be supplemented with calcium: at a certain age, they need to be supplemented with calcium.