J Dent Rehabil Appl Sci.  2016 Mar;32(1):87-92. 10.14368/jdras.2016.32.1.87.

Detection of maxillary second molar with two palatal roots using cone beam computed tomography: a case report

  • 1Department of Dentistry, Seoul Veterans Hospital, Seoul, Republic of Korea. endo95@naver.com


The purpose of this clinical report was to show anatomical variations in permanent maxillary second molar using computed tomography (CT). This case report describes the application of CT to detect the unusual root anatomy of maxillary second molar with 2 separate palatal roots for successful endodontic treatment procedures. The use of cone beam computed tomography (CBCT) can overcome the limitation of the periapical standard radiography caused by the overlap of buccal and secondary palatal roots.


root canal anatomy; two palatal root; cone beam computed tomography (CBCT)

MeSH Terms

Cone-Beam Computed Tomography*


  • Fig. 1 Preoperative radiograph.

  • Fig. 2 Radiograph showing severe secondary decay after old bridge removal.

  • Fig. 3 Working length with 3 roots.

  • Fig. 4 Postoperative radiograph of maxillary second molar filled with guttapercha and sealer.

  • Fig. 5 Cone beam computed tomography showing secondary palatal root. (A, B) Revealed a 2 palatal roots two separated foramina at the apex of maxillary second molar.

  • Fig. 6 Periapical standard radiograph was taken at different angles to confirm two separated.

  • Fig. 7 4th root canal orifice was clearly identified.

  • Fig. 8 Working length of 4th canal.

  • Fig. 9 4th canal filled with guttapercha and sealer.

  • Fig. 10 (A) Periapical standard radiograph: 5-month follow-up after 4th canal filling, (B) Cone beam computed tomography: 5-month follow-up after 4th canal filling.

  • Fig. 11 5-years follow-up after 4th canal filling.



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