Restor Dent Endod.  2015 Feb;40(1):75-78. 10.5395/rde.2015.40.1.75.

Endodontic treatment of a mandibular first molar with 8 canals: a case report

• Arora A
• Acharya SR
• Sharma P

• KMID: 2316927
• DOI: http://doi.org/10.5395/rde.2015.40.1.75

Abstract

Presented here is a case where 8 canals were located in a mandibular first molar. A patient with continuing pain in mandibular left first molar even after completion of biomechanical preparation was referred by a dentist. Following basic laws of the pulp chamber floor anatomy, 8 canals were located in three steps with 4 canals in each root. In both of the roots, 4 separate canals commenced which joined into two canals and exited as two separate foramina. At 6 mon follow-up visit, the tooth was found to be asymptomatic and revealed normal radiographic periapical area. The case stresses on the fact that understanding the laws of pulp chamber anatomy and complying with them while attempting to locate additional canals can prevent missing canals.

Keyword

Additional canals; Mandibular first molar; Orifice location; Pulp chamber anatomy; Symmetry

MeSH Terms

Dental Pulp Cavity
Dentists
Follow-Up Studies
Humans
Jurisprudence
Molar*
Tooth

Figure

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  Figure 1 Radiographs with which patient reported. (a) Pre-operative radiograph with artifact; (b) Working length radiograph. Files short of apex (short arrow) and intact pulp chamber roof (long arrow).

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  Figure 2 Location of additional canals. (a) Distobuccal canal (short arrow) and additional mesial canals (long arrows); (b) Additional distal canals. Buccal (short arrow) and lingual (long arrow) to previously assumed distobuccal canal.

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  Figure 3 Working length radiographs. (a) Mesial root. 4-2 configuration is clearly illustrated (short white arrows); (b) Distal root. Superimposed files seen in distolingual and bucco-distolingual canal (long black arrows).

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  Figure 4 Post obturation radiographs. (a) Straight on angulation; (b) Distal angulation; (c) 6 month follow up.

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