TY - RPRT TI - Mandibular first molar with three distal root canals. AU - Y Kimura AU - K Matsumoto PY - 2000 DO - 10.1046/j.1365-2591.2000.00343.x UR - https://pubmed.ncbi.nlm.nih.gov/11307466/ ID - 11307466 ER -