A diastema is considered normal in the primary and mixed dentition as part of normal dental development.
Diastema during primary dentition
Diastema during mixed dentition
A diastema, or space, between primary or permanent central incisors is often associated with, though not necessarily caused by, a prominent superior labial frenum. [The diastema can also be caused by an unerupted supernumerary, or extra tooth. A diastema persisting after eruption of the permanent canines (ages 10-13) should be evaluated for treatment options such as a frenectomy and/or orthodontic treatment.]