Root and Canal Configuration of Mandibular First Molars in a Yemeni Population: A Cone-beam Computed Tomography

Abstract

To describe root and canal morphology of mandibular first molars (MFMs) in a Yemeni population using cone-beam computed tomography (CBCT). Methods: CBCT images of 500 right and left untreated MFMs with fully developed roots from 250 Yemenis (125 male and 125 female) comprised the sample size of this study. The following characteristics were recorded: (1) number of roots and their type and morphology, (2) number of canals orifices per root, (3) type of canal configuration and (4) primary variations in the morphology of the root and canal systems. Results: 96.8% of MFMs are double-rooted. A third root was found in 3.2%, more in females than males. Mesial root was mainly ribbon-shaped (92.2%) and distal root was kidney-shaped in 56.2%. Two canals orifices were found in mesial root of 95.8% and one canal orifice was found in distal root of 96.4%. Vertucci type II canal configuration was the most frequent (57%), followed by type IV (35.6%) in mesial root. Type III canal configuration was the most prevalent (48.8%), followed by type I (41%) in distal root. Variant 3 represented the most common root and canal morphology (89.8%). Conclusion:MFMs in Yemeni population are mainly two-rooted with 3.2% having a supernumerary distolingual root. Cross section of mesial root was mainly ribbon-shaped and distal root was kidney-shaped. Vertucci type II and III configurations were the higher incidence in mesial and distal roots, respectively. The presence of two canals in mesial root and one canal in distal root of MFMs with two separate roots (variant 3) was the most common morphology.

Anatomical Evaluation of Mandibular Molars in a Saudi Population: An In Vivo Cone-Beam Computed Tomography Study

“…is implies that most of the first molars in the Saudi population have three canals. is finding is in agreement with the research conducted by Mashyakhy et al on the Saudi population [20], Abarca et al on the Palestinian population [36], and Senan et al on the Yemeni subpopulation [40]. In another study published by Silva et al [41] on CBCT images of mandibular first and second molars of a Brazilian population, the first molars had two separate roots (74%) with a greater occurrence of two canals in the mesial root and one canal in the distal root.…”

Prevalence of Three Rooted Mandibular First Molars in Egyptian population: Cross-sectional Study

“…This range is in accordance with the result of the current study. The prevalence of RE was higher in female3.42% then in male 2.91% but with no significance difference which in accordance with other studies (20,8) . In concurrency to previous studies in the literature which reported significant difference Regarding to gender (26) .…”

“…Limited numbers of previous studies estimate the prevalence of RE among Arab population. As the prevalence were 3% in Sudanese,2.9% in Saudi Arabian population, 3.052%in Yemeni population and 3.73% in Palestinian population (7,11,12,20) . This finding were in accordance with the result of current study which reported 3.12% for the prevalence of RE.…”

Root morphology of maxillary 1st premolar teeth in orthodontic extraction cases presenting in a tertiary care hospital: Taxilla Cantt.

“…Various populations when studied for gross root morphology of maxillary premolar teeth showed wide variation among maxillary 1 st premolar teeth 11,12 , but 2 nd premolar teeth has consistent morphology in most populations. Table-V explains variation of maxillary 1 st premolar root morphology among various populations worldwide.…”