Management of Single Rooted Mandibular Second Molar with Single Canal: Two Case Reports

Abstract

Background: The root canals of mandibular molar teeth show a wide variation in its system ranging from
single to multiple canals. Thorough understanding of the variations present in internal anatomy of teeth
is imperative for favorable outcome of the endodontic treatment. The insight of the tooth morphology,
variations present related to its root structure, shape and information regarding root canal, with number of
orifices and canal configuration, all this should be assessed prior to commence the endodontic treatment
Case Presentation: The present case report describes the variation in second mandibular molar, which is
infrequently mentioned in literature. Variation present may not always be in the form of extra canal, it can
be in the form of fewer or lesser canal than what is usually seen. On inspection of the pulpal floor with
endodontic explorer, a single round orifice was seen at the centre of the floor of pulp chamber. Numerous
angulated radiographs were obtained to assure the presence of independent single canal. Individual canal
preparation was carried out using ProtaperNiTi instruments (Maillefer, Dentsply) till F5. Using lateral
condensation technique along with sealapex sealer, obturation was carried out.
Conclusion: Knowledge of the number of root canals present within the tooth is imperative for successful
root canal treatment. Some teeth may show extra canals, while other may show fewer than normal number
of canals present. Mandibular second molar may present with single canal and this should be promptly
recognized. Single canal identification helps to conserve the tooth structure by eliminating the need for
removal of excessive tooth structure in search of extra canal.