Mesiodentes

A mesiodent is an extra tooth in the maxillary anterior incisor region. Mesiodentes are the most common supernumerary teeth, occurring in 0.15% to 1.9% of the population. The etiology of mesiodens is unclear, but is twice prevalent in males (possibly an autosomal recessive gene), and there is a familial trait. Proliferation of the dental lamina and genetic factors have been implicated. Mesiodentes can cause delayed or ectopic eruption of the permanent incisors, which can further alter occlusion and appearance.

Mesiodens sometimes interfere with eruption of permanent teeth and cause other alignment problems with the existing teeth. Only a small portion of supernumerary teeth eventually erupts.

To prevent additional damage such as misalignment and delayed eruption of the permanent central incisors early intervention is suggested. Usually it is preferred to wait until the root of the central and the lateral teeth are completely formed before mesiodents are removed.

Mesiodens have been found in certain syndromes such as cleft lip and palate, cleidocranial dysostosis, and Gardner's syndrome. Supernumerary teeth in general have associations with Ehler-Danlos syndrome, Apert syndrome, and Down's syndrome as well.

The concerns associated with mesiodens are listed below and removal is often needed

1. Delayed eruption of permanent teeth

2. Cyst formation

3. Crowding

4. Diastemas

5. Resorption of the roots of adjacent teeth

6. Eruption of mesiodens  in to the nasal cavity..

Below see two cases that show the mesiodents erupting in to the nasal cavity.