Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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The prevalence of radix molaris in the mandibular first molars of a Saudi subpopulation based on cone-beam computed tomography

  • AL-Alawi, Hassan (Dental Department, Ministry of Health Endodontist, Huraymala General Hospital) ;
  • Al-Nazhan, Saad (Department of Restorative Dentistry-Endodontics, College of Dentistry, Riyadh Elm University) ;
  • Al-Maflehi, Nassr (Department of Preventive Dental Sciences-Biostatistics, College of Dentistry, King Saud University) ;
  • Aldosimani, Mazen A. (Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University) ;
  • Zahid, Mohammed Nabil (Department of Preventive Dental Sciences, College of Dentistry, Prince Sattam Bin AbdulAziz University) ;
  • Shihabi, Ghadeer N. (General Practitioner)
  • Received : 2019.07.17
  • Accepted : 2019.10.01
  • Published : 2020.02.29
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Abstract

Objectives: The purpose of this study was to determine the incidence of radix molaris (RM) (entomolaris and paramolaris) in the mandibular first permanent molars of a sample Saudi Arabian subpopulation using cone-beam computed tomography (CBCT). Materials and Methods: A total of 884 CBCT images of 427 male and 457 female Saudi citizens (age 16 to 70 years) were collected from the radiology department archives of 4 dental centers. A total of 450 CBCT images of 741 mature mandibular first molars that met the inclusion criteria were reviewed. The images were viewed at high resolution by 3 examiners and were analyzed with Planmeca Romexis software (version 5.2). Results: Thirty-three (4.5%) mandibular first permanent molars had RM, mostly on the distal side. The incidence of radix entomolaris (EM) was 4.3%, while that of radix paramolaris was 0.3%. The RM roots had one canal and occurred more unilaterally. No significant difference in root configuration was found between males and females (p > 0.05). Types I and III EM root canal configurations were most common, while type B was the only RP configuration observed. Conclusions: The incidence of RM in the mandibular first molars of this Saudi subpopulation was 4.5%. Identification of the supernumerary root can avoid missing the canal associated with the root during root canal treatment.

Keywords

References

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