First, you should maintain a healthy diet with a limited number of foods “junk” (foods that contain high calories and provide few nutrients).
Moreover, you should choose foods if possible low in sugars, and most nutritious possible. In this regard, it is advisable to take a week a diary to record everything you eat, especially sweets.
Drink plenty of water (at least two liters per day).
In terms of hygiene, we should brush your teeth thoroughly at least twice a day using fluoride toothpaste and floss daily to get rid of plaque.
Also, you should go to the dentist regularly for preventive checkups and cleanings deep.