The maxillary incisors are the first four front teeth in the middle of the upper jaw. Usually, maxillary incisors appear between 6 and 8 years. 

As mentioned in the previous slide, the main functions of incisors, including the maxillary incisors, are cutting, plucking, and biting the food during chewing, as well as they help to hold the food in the oral cavity. Like other teeth, the maxillary incisors also take part in articulation and speech formation. They also give a visual and personal appearance, as well as help to shape the face and support the tissue of the face.

Maxillary incisors are divided into medial or central and lateral incisors, depending on their location relative to the midline.

The maxillary central incisors have the following numbers according to each dental notation system:

• 8 and 9  (Universal Tooth Numbering System)

• 11 and 21 (ISO system)

• 1 ┘ and 1└ (Palmer system)

The numbers of the maxillary lateral incisors are as follows:

• 7 and 10 (Universal Tooth Numbering System)

• 12 and 22 (ISO system)

• 2 ┘ and 2└ (Palmer system)