Fabra-Campos H
Int Endod J. 1989 Jan;22(1):39-43. doi: 10.1111/j.1365-2591.1989.tb00503.x.
Traditional teaching of the anatomy of root canals in different teeth can lead clinicians into the misguided belief that a predetermined number of root canals is always present in any given tooth. A new understanding of the root canal system has enabled the location of additional canals. Results of the clinical study of 760 first mandibular molars, showed that 20 (2.6 per cent) had three canals in the mesial root. Of these 20 teeth, 13 (65 per cent) had an intermediate canal which joined the mesiobuccal canal in the apical third. In six cases (30 per cent) it joined the mesiolingual canal in the same area. In only one case did the intermediate or third canal retain its individual nature and end in an independent foramen.
传统的不同牙齿根管解剖学教学可能会使临床医生错误地认为，任何一颗特定牙齿中总是存在预先确定数量的根管。对根管系统的新认识使得能够发现额外的根管。一项对760颗下颌第一磨牙的临床研究结果显示，20颗（2.6%）的近中根有三条根管。在这20颗牙齿中，13颗（65%）有一条中间根管，该中间根管在根尖三分之一处与近中颊根管相连。在6例（30%）中，它在同一区域与近中舌根管相连。只有1例中间根管或第三根管保持其独立性质并终止于一个独立的根尖孔。
