[A rare case of congenital dentin dysplasia in a child aged 8 years].

In the reported case the authors observed a considerable mobility of all milk teeth and permanent teeth. The degree of this mobility varied. The crowns of milk and permanent teeth had a normal size, shape and colour. All teeth were unresponsive to thermal and electric stimulation. Radiological examination showed a nearly complete lack of roots and complete absence of pulp chambers and root canals. This was confirmed by histological examinations demonstrating that the inner part of the teeth in the crown and root was filled with hard masses which in light microscopy resembled newly forming compact bone with Haversian structures. The absence of resorption sinuses in the rudimentary roots was noted. Paediatric examination failed to demonstrate any abnormalities.