Radix Entomolaris in the Mandibular Molar Teeth of an Iranian Population

Overview

Journal Int J Dent

Publisher Wiley

Specialty Dentistry

Date 2017 Apr 20

PMID 28421115

Citations 8

Authors

Maryam Kuzekanani

Laurence J Walsh

Jahangir Haghani

Ali Zeynali Kermani

Affiliations

Soon will be listed here.

Abstract

. Supernumerary roots in permanent mandibular molar teeth make endodontic treatment more complicated. The aim of this study was to determine the prevalence of Radix Entomolaris (RE) in permanent mandibular first and second molars in the population of Kerman, in the southeast of Iran. . From a collection of 500 mandibular first and second molar teeth extracted over 2015-2016 at dental clinics in Kerman, teeth were scored for an additional distolingual root, and the average root length and root morphology of this extra root were determined using the De Moor classification scheme. . In this population, RE occurred in 6% of mandibular first molars (4% with a straight apex (Type I) and 2% with buccal apical curvature (Type III)). In all cases, RE was the shortest root, with an average root length of 18.37 mm. RE occurred in only 0.8% of mandibular second molars, with an average root length of 18.0 mm. All mandibular second molars with RE were of Type III. Fisher's exact test showed that the difference in frequency between first and second molars was statistically significant (two-sided = 0.002). . Radix Entomolaris occurs more frequently in mandibular first molars than in mandibular second molars in this sample of 500 mandibular molars. The reported rate of 6% in first molars is expected to be higher than reported rates in European or Caucasian populations where the prevalence is typically less than 2%.

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References

Calberson F, De Moor R, Deroose C . The radix entomolaris and paramolaris: clinical approach in endodontics. J Endod. 2006; 33(1):58-63. DOI: 10.1016/j.joen.2006.05.007. View

Caliskan M, Pehlivan Y, Sepetcioglu F, Turkun M, Tuncer S . Root canal morphology of human permanent teeth in a Turkish population. J Endod. 1995; 21(4):200-4. DOI: 10.1016/S0099-2399(06)80566-2. View

Ferraz J, Pecora J . Three-rooted mandibular molars in patients of Mongolian, Caucasian and Negro origin. Braz Dent J. 1993; 3(2):113-7. View

Walton R . Endodontic radiographic technics. Dent Radiogr Photogr. 1973; 46(3):51-9. View

De Moor R, Deroose C, Calberson F . The radix entomolaris in mandibular first molars: an endodontic challenge. Int Endod J. 2004; 37(11):789-99. DOI: 10.1111/j.1365-2591.2004.00870.x. View

Colak H, Ozcan E, Hamidi M . Prevalence of three-rooted mandibular permanent first molars among the Turkish population. Niger J Clin Pract. 2012; 15(3):306-10. DOI: 10.4103/1119-3077.100627. View

Sert S, Bayirli G . Evaluation of the root canal configurations of the mandibular and maxillary permanent teeth by gender in the Turkish population. J Endod. 2004; 30(6):391-8. DOI: 10.1097/00004770-200406000-00004. View

Wang Q, Yu G, Zhou X, Peters O, Zheng Q, Huang D . Evaluation of x-ray projection angulation for successful radix entomolaris diagnosis in mandibular first molars in vitro. J Endod. 2011; 37(8):1063-8. DOI: 10.1016/j.joen.2011.05.017. View

Souza-Flamini L, Leoni G, Chaves J, Versiani M, Cruz-Filho A, Pecora J . The radix entomolaris and paramolaris: a micro-computed tomographic study of 3-rooted mandibular first molars. J Endod. 2014; 40(10):1616-21. DOI: 10.1016/j.joen.2014.03.012. View

10.

Mukhaimer R, Azizi Z . Incidence of Radix Entomolaris in Mandibular First Molars in Palestinian Population: A Clinical Investigation. Int Sch Res Notices. 2016; 2014:405601. PMC: 4897562. DOI: 10.1155/2014/405601. View

11.

Schafer E, Breuer D, Janzen S . The prevalence of three-rooted mandibular permanent first molars in a German population. J Endod. 2009; 35(2):202-5. DOI: 10.1016/j.joen.2008.11.010. View

12.

Gulabivala K, Aung T, Alavi A, Ng Y . Root and canal morphology of Burmese mandibular molars. Int Endod J. 2001; 34(5):359-70. DOI: 10.1046/j.1365-2591.2001.00399.x. View

13.

Chandra S, 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):e77-82. DOI: 10.1016/j.tripleo.2011.02.016. View

14.

Tu M, Tsai C, Jou M, Chen W, Chang Y, Chen S . Prevalence of three-rooted mandibular first molars among Taiwanese individuals. J Endod. 2007; 33(10):1163-6. DOI: 10.1016/j.joen.2007.07.020. View

15.

Kartal N, Yanikoglu F . Root canal morphology of mandibular incisors. J Endod. 1992; 18(11):562-4. DOI: 10.1016/S0099-2399(06)81215-X. View

16.

Kuzekanani M, Haghani J, Nosrati H . Root and canal morphology of mandibular third molars in an Iranian population. J Dent Res Dent Clin Dent Prospects. 2012; 6(3):85-8. PMC: 3442428. DOI: 10.5681/joddd.2012.018. View

17.

Shemesh A, Levin A, Katzenell V, Ben Itzhak J, Levinson O, Zini A . Prevalence of 3- and 4-rooted first and second mandibular molars in the Israeli population. J Endod. 2014; 41(3):338-42. DOI: 10.1016/j.joen.2014.11.006. View