Fused teeth are more frequent in the deciduous dentition than among permanent teeth. Generally fused deciduous teeth appear in the mandibular anterior region, and fusion of the maxillary deciduous central and lateral incisors is rare. In addition, bilateral dental fusion in the deciduous dentition is a rare dental anomaly.
Many cases with maxillary ab-type fused teeth may cause aesthetic problems and functional disorders in the anterior region of the maxilla.
We treated case of maxillary ab-type bilateral fused teeth over a long period of time.
Case 1 with maxillary ab-type fused teeth bilaterally involved congenitally missing of permanent successors in the same region.
Case 2 with maxillary ab-type fused teeth bilaterally involved the presence of permanent successors, but the growth of maxillary lateral incisors was very delayed.
Cases with deciduous fused teeth therefore need long-term clinical care. The long-term clinical care was especially of great importance in cases with maxillary ab-type fused teeth bilaterally.