Ricucci D, Pascon E A, Langeland K
Department of Restorative Dentistry and Endodontology, University of Connecticut, Farmington 06030, USA.
J Endod. 1996 Apr;22(4):185-7. doi: 10.1016/S0099-2399(96)80098-7.
Three cases of mandibular second molars with C-shaped root canal morphology are described. Two of these molars did not radiographically show the usual anatomic configuration of two separated roots, but rather had a single conical root. Only two root canals orifices were observed in the pulp chamber floor: a mesial-lingual orifice in its normal position and a buccal C-shaped fissure that was continuous from the normal location of the mesiobuccal canal to that of the distal canal. The fissure became smaller in the apical third, ending in a distal direction. The third case, a second molar extracted because of severe periodontal involvement showed, after sectioning, a C-shaped root with connections between all three canals.
本文描述了3例具有C形根管形态的下颌第二磨牙。其中2例磨牙在X线片上未显示出常见的两根分开的解剖形态，而是呈现单根圆锥形。在髓室底仅观察到两个根管口：一个位于正常位置的近中舌侧根管口，以及一条从近中颊侧根管的正常位置延伸至远中根管的颊侧C形裂隙。该裂隙在根尖三分之一处变窄，并向远中方向结束。第三例，一颗因严重牙周病变而拔除的第二磨牙，在切片后显示为C形根，三根之间相互连通。
