JOE JUNE 2011 - Mandibular First Molar with Six Separate Canals

Mandibular First Molar with Six Separate Canals

Jeffrey L. Ryan, DDS, MS,* Walter R. Bowles, DDS, MS, PhD,† Michael K. Baisden, DDS,† and Scott B. McClanahan, DDS, MS†

Introduction: Many anatomical variations can occur within the mandibular first molar. Commonly, 3–4 canals are located, but as many as 6–7 canals have been reported. Methods: This report describes a case of a mandibular first molar with 6 separate canals (3 mesial and 3 distal) that was instrumented with conven- tional hand and rotary files and obturated by using a hybrid warm vertical compaction technique. Results: Recall examination as far as 3 years post-treatment found no sensitivity to percussion or palpation and recall radiographs after treatment show resolution of the previous apical periodontitis. Conclusions: The existence of such teeth as these underlies the importance of looking for additional canals. 

(J Endod 2011;37:878–880)

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