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. 2012 Apr 12;4(2):123–128. doi: 10.1016/j.jare.2012.03.002

Fig. 2.

Fig. 2

Different features of root canal in mandibular first premolar: (A) inter-canal isthmi connecting two canals, (B) apical delta (C) lateral canal, (D) laterally located apex, and (E) centrally located apex.