Introduction
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| Geminated Central Incisor |
Fusion and gemination are terms which describe “double teeth.” Gemination; means two separate morphological units were created by division of the tooth germ.1 The result is the incomplete formation of two teeth. The resultant structure is usually one with two completely, or partially separated crowns having a single root and root canal. It occurs in the deciduous and permanent dentition.2
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| Fused Central Incisor |
On the other hand, fusion is a developmental anomaly which occurs due to a union of one or more adjacent teeth during development.1 Fusion may be either complete or incomplete. The tooth may have separate or fused root canals. The condition is common in the deciduous as well as in the permanent dentition.2
The etiological factors related to many dental anomalies are still uncertain. The changes in tooth form can be hereditary or caused by disease or trauma.3 It is not always possible to differentiate between gemination and a case in which there has been fusion between a normal tooth and supernumerary tooth.2
Knezevic et al.1 examined 3517 plaster models to find the prevalence of double teeth (fusion and gemination) among the persons tested as to gender, distribution in the maxilla or mandible, and whether the anomaly occurred bilaterally or unilaterally. The results of their investigation have shown a prevalence of double teeth was 0.2%; 57.2% of them were fused and 42.9% geminated.
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| Page 2 of 9 | |
| Citation Number: Vol. 5, No. 1, Page 137 |
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