根管系统虽较为复杂，但主要是双根管和三根管型。
The root canal systems were comparatively complex, but most of them were most of double three canals.
前言： 目的：建立双根口服液除杂质的工艺方法。
Objective:To establish a procedure of removing the impurity in double-root oral solution.
下颌切牙中，双根管、根管分支和根管分歧都有一定的发生率。
The two root canals, root canal diverge and root canal branch et al have considerable incidence. Besides, mesial-distal root canal walls of mandibular incisor teeth are thin.
下颌切牙中，双根管、根管分支和根管分歧都有一定的发生率。
The two root canals, root canal diverge and root canal branch et al have considerable incidence. Besides, mesial-distal root canal walls of mandibular incisor teeth are thin.
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