Your upper teeth
As a baby, you have 10 upper primary teeth: two central incisors, lateral incisors, canines, first molars and second molars. But as you reach adulthood, that number grows to 16 with the addition of two first premolars, two second premolars and two third molars, as depicted by the American Dental Association (ADA).
Most of your maxillary teeth serve a specific function in eating and digestion. Think of them as food-preparation tools you'd find in your kitchen: An incisor is like a knife, cutting into the food you eat; canines are like forks, serving to tear and break down this food; and your premolars, first and second molars are like a mortar and pestle, cutting and crushing your food for digestion.
But unlike your ancestors, who needed their third molars for their generation's typical diet, you no longer have the room in your mouth or the use for them, as explained by Indiana Public Media. Today, most dentists advise extracting these "wisdom teeth" to prevent overcrowding and infection.