The neurocranial and craniofacial morphology in children with solitary median maxillary central incisor (SMMCI).

OBJECTIVES

The purpose of this study was to describe the neurocranial and craniofacial morphology on profile radiographs of children with single median maxillary central incisor (SMMCI).

DESIGN

Cephalometric analyses of neurocranium and craniofacial morphology on profile radiographs.

SETTING AND SAMPLE POPULATION

Department of Orthodontics, School of Dentistry, University of Copenhagen. Thirteen children with SMMCI, 12 girls and one boy (7-17 years of age).

OUTCOME MEASURE

Cephalometric measurement were compared with normal standards using a paired t-test and Wilcoxon signed rank test.

RESULTS

The size of the neurocranium (especially the length of the anterior cranial base), the maxillary prognathia, the maxillary inclination, the mandibular prognathia and the inclination of the mandibular incisors are significantly reduced in SMMCI. The mandibular inclination, the vertical jaw relationship, the alveolar bone prognathia in the upper jaw and the mandibular angle are significantly enlarged in SMMCI.

CONCLUSION

The present study showed that occurrence of SMMCI is a sign of a developmental anomaly associated with deviations in neurocranial size and shape and in craniofacial morphology.