There are 4 types of teeth in our mouth - the incisors, canines, premolars, & molars. Incisors & canines are meant to cut & tear the food respectively while the premolars and molars function in grinding and crushing the food.
There are only four significant teeth types. These are the incisors, canines, premolars, and molars. You can quickly identify them in your mouth. As in the case of babies, premolars are absent. Rest all the teeth look similar in babies as well.
Sometimes it is important to know the tooth anatomy. Most of us use layman dental terminologies as lower front teeth or upper back teeth. But it would be great if you could identify parts of teeth such as crown, neck, etc.
If someone asks you how many teeth do you humans have? Then the most accurate answer would be - it depends on the age group. Children and adults have different types of teeth. The number of teeth also varies. Children have 20 teeth, whereas adults have 32 teeth (including 4 wisdom teeth).