Maxillary first molar with an O-shaped root morphology: Report of a case

Yooseok Shin, Yemi Kim, Byoung Duck Roh

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This case report is to present a maxillary first molar with one O-shaped root, which is an extended C-shaped canal system. Patient with chronic apical periodontitis in maxillary left first molar underwent replantation because of difficulty in negotiating all canals. Periapical radiographs and cone-beam computed tomography (CBCT) were taken. All roots were connected and fused to one root, and all canals seemed to be connected to form an O-shape. The apical 3 mm of the root were resected and retrograde filled with resin-modified glass ionomer. Intentional replantation as an alternative treatment could be considered in a maxillary first molar having an unusual O-shaped root.

Original languageEnglish
Pages (from-to)242-244
Number of pages3
JournalInternational Journal of Oral Science
Issue number4
StatePublished - Dec 2013


  • O-shape
  • cone-beam computed tomography scanning
  • intentional replantation
  • maxillary first molar
  • root canal anatomy


Dive into the research topics of 'Maxillary first molar with an O-shaped root morphology: Report of a case'. Together they form a unique fingerprint.

Cite this