The prevalence of radix molaris in the mandibular first molars of a Saudi subpopulation based on cone-beam computed tomography
AL-Alawi Hassan, Al-Nazhan Saad A., Al-Maflehi Nassr, Aldosimani Mazen A., Zahid Mohammed Nabil, Shihabi Ghadeer N.,
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( AL-Alawi Hassan ) - Huraymala General Hospital Ministry of Health Endodontist Dental Department
( Al-Nazhan Saad A. ) - Riyadh Elm University College of Dentistry Department of Restorative Dentistry-Endodontics
( Al-Maflehi Nassr ) - King Saud University College of Dentistry Department of Preventive Dental Sciences-Biostatistics
( Aldosimani Mazen A. ) - King Saud University College of Dentistry Department of Oral Medicine and Diagnostic Sciences
( Zahid Mohammed Nabil ) - Prince Sattam Bin Abdulaziz University College of Dentistry Department of Preventive Dental Sciences
( Shihabi Ghadeer N. ) - General Practitioner
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.
키워드
Cone-beam CT; Mandibular first molar; Radix entomolaris; Radix molaris; Root canal morphology
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