Root Canal Lower Molar First

Mid mesial canal and a ribbon shaped canal in MB canal almost 4 canals.  Depending on how you shaped this it would be considered 3 or 4 canals.  Appears that mid mesial joins ML.

CaOH

Final

Xray taken from distal so ML and mid-mesial on left.

ML, mid-mesial, and MB apparent.  MB2 is probably more of a ribbon fin of off MB.  I filled separately.