The permanent mandibular incisors are the first four front teeth in the middle of the lower jaw. Usually, mandibular incisors appear between 6 and 7 years of age.

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

Mandibular incisors are divided into two subdivisions - medial or central and lateral incisors - depending on their location relative to the midline.

Mandibular and maxillary incisors are easy to distinguish because the mandibular incisors lack the lingual pit, as well as they have a characteristic shape of the root.

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

24 and 25 (Universal Tooth Numbering System)
31 and 41 (ISO system)
1┌ and 1 ┐ (Palmer system)

The numbers of the mandibular lateral incisors are as follows:

23 and 26 (Universal Tooth Numbering System)
32 and 42 (ISO system)
2┌ and 2 ┐ (Palmer system)

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Mandibular incisors