Two Canals in Maxillary First Molar: A Rare Dental Entity

Abstract

Root anatomy studies were divided into laboratory studies (In-Vitro), clinical root canal system anatomy studies (In vivo) and clinical case reports of anomalies. Over 95% (95.9%) of maxillary first molars had three roots and 3.9% had two roots. The incidence of fusion of any two or three roots was approximately 5.2%. Conical and C-shaped roots and canals were rarely found (0.12%).The fusion of the two buccal roots has the prevalence of 0.4% in maxillary first molars. Nevertheless, presence of only one buccal root with one canal is extremely rare.