Fig. 3From: Cone-beam computed tomography investigation of middle mesial canals and isthmuses in mandibular first molars in a Chinese populationMM canal of tooth #30 at three different axial view levels (cervical, middle, and apical) and in a coronal view image. a axial view of cervical third, ) middle third, and c apical third. d Image of coronal view showing the MM canal. The arrow points to the MM canalBack to article page