<prompt> The following radiograph shows:Fusion in 22Gemination in 22Concrescence in 22Dilaceration in 21  <response>: GeminationGeminated teeth are anomalies which arise from an attempt at the division of a single tooth germ by an invagination, with resultant incomplete formation of two teeth. The structure is usually one with two completely or incompletely separated crowns that have a single root and root canal. It is seen in deciduous as well as permanent dentition, and in some reported cases, appears to exhibit a hereditary tendency. It is not always possible to differentiate between gemination and a case in which there has been a fusion between a normal tooth and a supernumerary tooth.Radiological signsThe tooth has a notched incisal margin with a confluent or partially joined pulp canal system. 