The prevalence of radix molaris in the mandibular first molars of a Saudi subpopulation based on cone-beam computed tomography
- Author:
Hassan AL-ALAWI
1
;
Saad AL-NAZHAN
;
Nassr AL-MAFLEHI
;
Mazen A. ALDOSIMANI
;
Mohammed Nabil ZAHID
;
Ghadeer N SHIHABI
Author Information
- Publication Type:Original Article
- Keywords: Cone-beam CT; Mandibular first molar; Radix entomolaris; Radix molaris; Root canal morphology
- MeSH: Cone-Beam Computed Tomography; Dental Pulp Cavity; Female; Humans; Incidence; Male; Molar; Prevalence
- From:Restorative Dentistry & Endodontics 2020;45(1):1-
- CountryRepublic of Korea
- Language:English
- 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.
