Structural and radiographic evaluation of four cases of tooth fusion.

Four cases of tooth fusion are presented. Three of the patients were female and one male. Radiographic examination revealed union of calcified tissues with discrete root canals and a common pulp chamber in Case 3 and the converse in Case 4. The finding of fused mandibular incisors and canines in both the deciduous and permanent dentitions is described in Case 1, while in two others unilateral fused tooth masses are described which are not repeated in the permanent dentition. The dentist should be aware of the possibility of finding fused teeth on routine dental inspection and once diagnosed the patient should be informed of the potential hazards as regards plaque accumulation and varied root canal morphology.