Parameswaran A, Udayakumar P
Madras Dental College.
Fed Oper Dent. 1990 Aug;1(1):25-7.
Morphogically the mandibular second premolars present one root canal (97.5%). So far only a small percentage (2.5%) of cases were reported to have two root canals where they present the canals on the buccal and lingual direction of the root. Here an unusual case of two root canals, which are situated in mesial and distal direction is presented.
从形态学上看，下颌第二前磨牙有一个根管（97.5%）。到目前为止，仅有小部分病例（2.5%）被报道有两个根管，这些病例中根管位于牙根的颊侧和舌侧方向。本文展示了一个不寻常的病例，其两个根管位于近中方向和远中方向。
