Around the ages of six to eight years, the first teeth start to fall out and the permanent teeth erupt through the gums. By the age of 13 years, most of the permanent teeth, except for the wisdom teeth, should be in.
Permanent teeth will not be replaced, so remember:
Brush at least twice per day and floss once per day
Reduce sugar Intake. Tooth decay is caused by bacteria that feed on sugar. This forms acid that harms your teeth
Limit snacking
Eat a healthy, balanced diet
Wear a mouthguard to protect your teeth when you are playing sports