A Micro-Computed Tomography Study of the Root Canal Morphology of Mandibular First Premolars in an Emirati Population

Abstract

Objective: To investigate variations in the root canal morphology of mandibular first premolars in a population from the United Arab Emirates using micro-computed tomography (micro-CT) and conventional radiography. Materials and Methods: Three-dimensional images of 50 extracted human mandibular first premolars were produced using a micro-CT scanner, and conventional radiography was also used to record the number of roots, the root canal system configuration, the presence of a C-shaped canal system and lateral canals, intercanal communications, and the number and location of apical foramina. The interpretations of micro-CT and conventional radiography were statistically analyzed using Fisher's exact test. Results: Variable root canal configurations based on Vertucci's classification were observed in the teeth (i.e., types I, III, IV, V, and VII). The examined teeth exhibited the following 2 additional root canal configurations, which did not fit Vertucci's classification: type 1-2-3 and type 1-3. A C-shaped canal configuration was present in 14 (28%) cases, and lateral canals were present in 22 (44%) cases. Apical deltas were found in 25 (50%) cases, intercanal communications were seen in 6 (12%) cases, and apical loops were seen in 2 (4%) of the samples. Micro-CT and X-ray imaging identified 39 (78%) and 34 (68%) apical foramina, respectively. A single apical foramen was detected in 33 (66%) samples, and 2 or 3 apical foramina were detected in 14 (28 %) and 3 (6%) samples, respectively. In 18.5 (37%) samples the apical foramina were located centrally, and in 31 (62%) they were located laterally. Conclusion: A complex morphology of the mandibular first premolars was observed with a high prevalence of multiple root canal systems.

Micro-tomographic characterization of the root and canal system morphology of mandibular first premolars in a Chilean population

“…Liu et al 5 reported single canal detection in 65.2% of teeth and multiple canal detection in 26.1% of the analyzed teeth, while Dou et al 8 reported 64.04% and 35.96%, respectively. Similarly, Alkaabi et al 22 reported the single canal detection in 68% of teeth and multiple canal detection in 32% of teeth in an Emirati population. Conversely, Pedemonte et al 18 reported a different detection in the Chilean population, with an incidence of multiple root canal in 16.83% of the analyzed teeth.…”

“…Similarly, Alkaabi et al . 22 reported the single canal detection in 68% of teeth and multiple canal detection in 32% of teeth in an Emirati population. Conversely, Pedemonte et al .…”

Mandibular mesial root canal morphology using micro‐computed tomography in a Brazilian population

“…Several studies have reported the mesial root of the mandibular first molars have a highly variable internal canal configuration. Factors that can contribute to differences in the internal complexities of the root canal anatomy include ethnicity, age, gender and study design .…”

255-nm Light-emitting Diode Kills Enterococcus faecalis and Induces the Production of Cellular Biomarkers in Human Embryonic Palatal Mesenchyme Cells and Gingival Fibroblasts

“…The instrumentation of the canal space is a vital step in these processes, but it has its limitations due to the complexity of the lateral canals, fins, and crevices along the walls of the canal systems. This has been demonstrated by microcomputed tomography (CT) scanning which showed extensive root canal configuration (1) and large areas of the root canals walls that were left untouched by the instruments (2)(3)(4)(5).…”