[Prevention of the eruption of an upper later incisor by a compound odontoma. Case report]. / Durchbruchsbehinderung eines lateralen Inzisiven im Oberkiefer aufgrund eines zusammengesetzten Odontoms. Ein Fallbericht.

Odontomas are the most common odontogenic tumours. They are considered as hamartomas - a local tissue malformation without autonomous growth potential - and are non-neoplastic. Clinically and histopathologically, compound and complex odontomas can be differentiated. Compound odontomas consist of a varying number of tooth-like structures and histology show dental tissues in an orderly pattern. Most often compound odontomas are diagnosed in young patients in the anterior maxilla. Patients are rarely complaining of symptoms and they are usually diagnosed during routine radiographic examinations or due to late eruption of permanent or persistence of deciduous teeth. The following case report presents a disturbed eruption of a lateral right incisor of the maxilla in a 8-year old female patient. Clinical, radiological and histopathological characteristics of this lesion will be discussed as well as therapy and follow-up.

[Developmental disorders of permanent teeth after injuries of their primary predecessors. A retrospective study]. / Posttraumatische Entwicklungsstörungen bleibender Zähne nach Milchzahntrauma: eine retrospektive Studie.

The present study evaluated posttraumatic developmental disturbances of 74 permanent teeth in 30 children, who had been treated in our department between 1992-1996 following trauma to the deciduous dentition. The recall in early 2001 included a clinical and radiographic examination. 24 of the permanent teeth showed developmental disturbances following injuries to their primary predecessors. The most frequent malformations were enamel discoloration and enamel defects. Injuries to the primary teeth that caused the majority of developmental disturbances were intrusions and lateral luxations. These results clearly show that the odontogenesis of permanent teeth can be influenced by trauma to deciduous teeth. Therefore, follow-up examinations are highly recommended after injuries to the primary dentition.