Nayak B Gurudutt, Singh Inderpreet
Department of Conservative Dentistry and Endodontics, K.D. Dental College and Hospital, Mathura, Uttar Pradesh, India.
Gen Dent. 2013 Aug;61(5):43-6.
The root canal anatomy of a permanent mandibular first molar has been traditionally described as 2 roots--1 mesial and 1 distal--with 2 canals in the mesial root and 1 or 2 canals in the distal root. Nonetheless, other possibilities exist. The presence of a third canal in the mesial root has been reported to have an incidence of 0%-17%. Conventional radiographs are routinely used to determine root canal anatomy; however, these are 2-dimensional representations of a 3-dimensional object. Advanced diagnostic methods that can provide 3-dimensional data, such as spiral computed tomography (SCT), is very helpful in determining complex morphology. This case report presents the management of a mandibular first molar with 3 mesial and 2 distal canals, confirmed with the aid of both SCT and conventional radiographic methods.
传统上，恒牙下颌第一磨牙的根管解剖结构被描述为2个牙根——1个近中根和1个远中根——近中根有2个根管，远中根有1个或2个根管。然而，还存在其他可能性。据报道，近中根存在第三根管的发生率为0%至17%。传统X线片通常用于确定根管解剖结构；然而，这些是三维物体的二维图像。能够提供三维数据的先进诊断方法，如螺旋计算机断层扫描（SCT），在确定复杂形态方面非常有帮助。本病例报告介绍了借助SCT和传统X线片方法确诊的具有3个近中根管和2个远中根管的下颌第一磨牙的治疗情况。
