George Alexandru Maftei, Cristina Popa, Daniel Cioloca, Ionut Taraboanta, Oana Ciurcanu, Ana Maria Filioreanu, Liliana Foia
Concrescence is a dental anomaly of morphology in which two teeth are fused together at the cementum level. We report an exceptionaly rare case of an impacted mandibulary third molar in concrescence with a supernumerary tooth in a 31-year-old male. The panoramic radiograph showed a radiopaque and tooth-like mass located in the posterior region of the third quadrant. After the surgery it was revealed that the tooth-like structure was a union of the impacted mandibulary third molar with a supernumerary fourth molar, creating a dental concrescence. To our knowledge, only two more cases of inversely fusion of a maxillary third molar with a supernumerary tooth have been reported.