Humans have 2 sets of teeth during their life: primary (milk or baby) and permanent. There are 20 baby teeth (consists of incisors, canines and molars) that start growing from six months and are fully visible by two years of age. Permanent teeth is the second set of teeth that replaces the baby teeth from approximately 6 years old and usually a full set is complete by the age of 18. There are 32 of them.
Incisors are the 4 front teeth on both the upper (maxillary) and lower (mandibular) arches of jaw. They are responsible for biting food. Center teeth are called central incisors and teeth on either side of them are called lateral incisors.
Canines are 4 teeth that form the corners of the mouth and are closest to the lateral incisors. They are responsible for tearing food particles when chewing.
Premolars are 8 teeth that follow after canines. They are responsible for crushing food in the chewing process. Premolars are present only as permanent teeth.
Molars are 12 human’s biggest teeth. Some people never develop third molars (also known as “wisdom teeth”) and have only 28 teeth. Often last molars have too little space in the back of the mouth, so they have difficulty coming out. In those situations they have to be surgically removed. These teeth role is to grind the food.