Root canal anatomy is complicated and interpretation of the variations from the norm is crucial for an optimum treatment outcome. Radix entomolaris (RE) is a common variation recorded in the mandibular molars. It is characterized by a supernumerary root located distolingually. Proper diagnosis is critical for identifying this supernumerary root and preventing misdiagnosis, which could potentially give rise to an unfavorable outcome. The objective of this article is to describe the successful management of two cases presenting with RE.
Vertucci FJ. Root canal morphology and its relationship to endodontic procedures. Endod Top 2005;10(1):3–29. DOI: 10.1111/j.1601-1546.2005.00129.x.
Carabelli G, Carabelli G, von Lunkaszprie GC, Georg Carabelli E. Systematisches Handbuch der Zahnheilkunde. Georg Olms Verlag; 1844.
Bolk L. Bemerkungen über Wurzelvariationen am menschlichen unteren Molaren. Z Für Morphol Anthropol 1915;(H. 3):605–610.
Calberson FL, De Moor RJ, Deroose CA. The radix entomolaris and paramolaris: clinical approach in endodontics. J Endod 2007;33(1): 58–63. DOI: 10.1016/j.joen.2006.05.007.
Chandra SS, Chandra S, Shankar P, Indira R. Prevalence of radix entomolaris in mandibular permanent first molars: a study in a South Indian population. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011;112(3):e77–e82. DOI: 10.1016/j.tripleo.2011.02.016.
Tu M-G, Huang H-L, Hsue S-S, Hsu J-T, Chen S-Y, Jou M-J, et al. Detection of permanent three-rooted mandibular first molars by cone-beam computed tomography imaging in Taiwanese individuals. J Endod 2009;35(4):503–507. DOI: 10.1016/j.joen.2008.12.013.
Garg AK, Tewari RK, Kumar A, Hashmi SH, Agrawal N, Mishra SK. Prevalence of three-rooted mandibular permanent first molars among the Indian population. J Endod 2010;36(8):1302–1306. DOI: 10.1016/j.joen.2010.04.019.
Carlsen OLE, Alexandersen V. Radix entomolaris: identification and morphology. Eur J Oral Sci 1990;98(5):363–373. DOI: 10.1111/j.1600-0722.1990.tb00986.x.
De Moor RJG, Deroose C, Calberson FLG. The radix entomolaris in mandibular first molars: an endodontic challenge. Int Endod J 2004;37(11):789–799. DOI: 10.1111/j.1365-2591.2004.00870.x.
Song JS, Choi H-J, Jung I-Y, Jung H-S, Kim S-O. The prevalence and morphologic classification of distolingual roots in the mandibular molars in a Korean population. J Endod 2010;36(4):653–657. DOI: 10.1016/j.joen.2009.10.007.
Tratman EK. Three rooted lower molars in man and their racial distribution. Br Dent J 1938;64:264–274.
Curzon ME, Curzon JA. Three-rooted mandibular molars in the Keewatin Eskimo. J Can Dent Assoc 1971;37(2):71–72. PMID: 5276909.
Turner CG. Three-rooted mandibular first permanent molars and the question of American Indian origins. Am J Phys Anthropol 1971;34(2):229–241. DOI: 10.1002/ajpa.1330340207.
Yew S, Chan K. A retrospective study of endodontically treated mandibular first molars in a Chinese population. J Endod 1993;19(9):471–473. DOI: 10.1016/S0099-2399(06)80536-4.
Pai AV, Jain R, Colaco AS. Detection and endodontic management of radix entomolaris: report of case series. Saudi Endod J 2014;4(2):77. DOI: 10.4103/1658-5984.132723.
Walker RT, Quackenbush LE. Three-rooted lower first permanent molars in Hong Kong Chinese. Br Dent J 1985;159(9):298–299. DOI: 10.1038/sj.bdj.4805710.
Duman SB, Duman S, Bayrakdar IS, Yasa Y, Gumussoy I. Evaluation of radix entomolaris in mandibular first and second molars using cone-beam computed tomography and review of the literature. Oral Radiol 2020;36(4):320–326. DOI: 10.1007/s11282-019-00406-0.
