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PubMed2005

Case report: Evaluation of supernumerary teeth with computerized tomography.

Radiographs play an important role in assessment of both the location and the typing of supernumerary teeth. In general, periapical, occlusal, and/or panoramic radiographs are sufficient for providing the information required by the clinician. These modalities, however, do not provide detailed information concerning the 3-dimensional relationship between supernumerary or ectopically impacted teeth and adjacent structures. This case report discusses the value of computerized tomography (CT) for evaluation of the root relationships of supernumerary teeth located palatally to maxillary permanent central incisors. CT accurately demonstrated the relationship between the supernumerary teeth and the permanent tooth roots.

Adolescent↗
PubMed2001

A rare non-syndrome case of concomitant multiple supernumerary teeth and partial anodontia.

Concomitant hypo-hyperdontia is an uncommon condition of coexistence of partial anodontia and supernumerary teeth. Its etiology is still unknown. Very few cases have been reported in the literature of this condition. Presented here is a rare and first such case of simultaneous presence of multiple supernumerary teeth and a missing tooth (canine) without any associated systemic conditions or syndromes involving both jaws.

Anodontia↗
PubMed1997

Analysis of fused maxillary incisor dentition in p53-deficient exencephalic mice.

Out of a total of 21 exencephalic p53-deficient embryonic and newborn mice, 6 (28.6%) possessed fused maxillary incisor teeth. On histological analysis of the 5 examples seen on day 19.5 of gestation and newborn mice, 3 varieties were observed: an example of 'simple' fusion, 3 examples of simple fusion each of which contained a 'dens in dente' ('tooth within a tooth'), and a single example in which the fused teeth were associated with a median supernumerary incisor tooth which, while deeply indenting the labial surface of the fused teeth, was in all locations a completely separate unit. 3-D reconstructions of the fused teeth demonstrated that they were all of the fusio subtotalis variety. No gross abnormalities were observed in the other dentition in these mice. It is noted that in mice fused maxillary incisor teeth are relatively commonly associated with both hypervitaminosis A-induced and trypan blue-induced exencephaly. It is believed that the presence of dens in dente within fused maxillary incisor teeth has only once been reported in mice, and the association between fused maxillary incisor teeth and a median supernumerary incisor tooth has not previously been reported in this species.

Animals↗
PubMed1992

Maxillary lateral incisor of subjects with cleft lip and/or palate: Part 1.

As a pilot study, dental casts of 30 patients with unilateral cleft lip and palate were selected and examined from the longitudinal data in the Department of Orthodontics, Kyushu University Dental Hospital. Dental casts of the anterior teeth were sectioned at right angles to the long axis of the tooth 2 to 3 mm below the incisal edge. The teeth were differentiated according to their cross sections. They were classed as lateral incisors or other types by the ratio of labiolingual diameter to mesiodistal diameter and the flatness labiolingually. Dental casts of 309 additional patients with cleft alveolus were examined subjectively based on above findings. In primary dentition, 183 of 184 teeth on the cleft side were incisal type. One tooth was canine type. In permanent dentition, 42 of 78 teeth on the cleft side were conical type, 20 teeth were intermediate type, and 16 teeth were incisal type. As a conclusion, the tooth on the cleft side is almost certain to be a lateral incisor, not a supernumerary canine tooth. As well, their form was normal in the majority of the primary dentition, but malformed in the permanent one.

Alveolar Process↗