This short commentary focus on two observations in two different dental conditions where neuropsychiatric diagnosis is needed. The permanent maxillary incisors are the two central incisors in the upper jaw and the two lateral incisors located between the central incisors and the canines in the upper jaw. All four maxillary incisors develop in the lower aspect of the frontonasal field of
development. This field develops from cells migrating from the anterior part of the neural crest [1]. The field extends from the sella turcica to the lower part of the frontal bone, to the midaxial part of the face and posteriorly including the septum nasii. In this short communication we will highlight 2 different kinds of tooth malformations within this field. Most publications on dental malformations in the frontonasal field are case reports and only few scientific publications are
based on several cases. The purpose of this presentation of the dental conditions SMMCI and macrodontic maxillary incisors is to make neuropsychiatrists aware of an important correlation between dentistry and
neuropsychiatry.