Tips to Maintain Dental health Practice good oral hygiene. Brush your teeth twice a day and flow daily between your teeth to remove the toothache. Even if you have no healthy teeth or prostheses, do not use tobacco products at least once a year. There are billions of germs in our mouths at any one time. Many bacteria create plaque, leading to tooth decay (cavity) and gingivitis, and periodontal disease. For a healthy smile, you must exercise good dental …