A Concrescence between Second and Third Molars

Background: Concrescence is a rare dental anomaly in which juxtaposed teeth are united in the cementum but not in the dentin. The incidence of Concrescence teeth is reported to be highest in the posterior maxilla. It often involves a second molar with roots in near proximity to those of a third molar. It is more common on maxillary third and second molars and may be inadvertently diagnosed during a tooth extraction. Although the exact etiology of concrescence has not yet been explained, it is usually suspected that space restriction during development, local trauma, excessive occlusal force or local infection after development play an important role. Unexpected complications arising from the concrescence may lead to legal issues. Case Report: Extracting right maxillary second molar in a 33-year-old female patient with a chief complaint of toothache in a right maxillary second molar. It became evident that the second and third molars were attached between the roots. So both teeth were extracted a traumatically and healing was uneventful. Conclusion: In fact, concrescence is not common anomaly, so the clinician should always consider it, especially in the case of maxillary molars, and the patient should be informed about its complications. A small fused area may be separated during the extraction. But a broader connected area (like in this case) may lead to the extraction of both involved teeth.