Clinical and ultrastructural study of the natal tooth: enamel and dentin assessments.

A natal tooth, the lower left central primary incisor, extracted from a twenty-eight-day-old boy was the subject of a clinical and ultrastructural (S.E.M.

[Natal and postnatal teeth: their enamel].

The enamel of a natal tooth in a healthy full-term child and the enamel of a postnatally erupted tooth in a premature child have been studied with scanning electron microscopy on longitudinal and cross sections. The first case shows that following a normal development, amelogenesis was arrested. This is evident by the presence of the external aprismatic layer in spite of the narrowness of the enamel which corresponds to about a third of the normal thickness.

[Dental delay and microdontia in children with somatotropin hormone deficiency].

The clinical effects of growth hormone deficiency on dental development were studied in 27 young people aged 3.5-17.5 years, suffering from pituitary dwarfism.

[Oral evaluation in various pathological conditions in children].

The current knowledge concerning the study of dental cavities cannot account for all clinical aspects of some subjects' resistance to cavity formation. This work concerned, in a first stage, the study of dental anomalies (number, shape and structure), in different groups of children with common diseases. This study has enabled us to evaluate the caries index of the same groups of children.