Cone-beam computed tomography study of the root and canal morphology of mandibular permanent anterior teeth in a Chongqing population

Abstract

ObjectiveTo investigate the root and canal morphology of permanent mandibular anterior teeth in a Chongqing population using cone-beam computed tomography (CBCT).MethodsCBCT images of 1,725 patients in a Chongqing population were selected, and a total of 9,646 mandibular anterior teeth were analyzed. The number of root canals and the canal configurations were investigated.ResultsIn total, 0.3% (11/3,257) of lateral incisors and 0.8% (26/3,014) of canines had double roots, and 3.8% (127/3,375) of central incisors, 10.6% (345/3,257) of lateral incisors, and 4.2% (127/3,014) of canines had multi-root canals. The difference in the incidence of multi-canals in lateral incisors between female and male was statistically significant. The frequency of multi-canals in the different age groups was 5.0% for central incisors for ages 21–30 years, 14.7% for lateral incisors for ages 41–50 years, and 8.1% for canines for ages 41–50 years.ConclusionWith the limitations of the current study, we found that a high percentage of mandibular anterior teeth had multiple canals in the studied Chinese Chongqing population. The current data may provide clinicians practicing in Chongqing with a more thorough understanding of root canal morphology.

Symmetry of root and root canal morphology of mandibular incisors: A cone-beam computed tomography study in vivo

“…These findings were higher than all the studies previously performed (27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40), but lower than the study by Benjamin and Dawson (26), ranging from 0,1% to 27,5%. Type I Vertucci configuration was present in 55% of mandibular central incisors, lower than other studies (26)(27)(28)(29)(30)(31)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44), but in accordance with Kartal et al (34), and superior to Sert et al (32). Similar comparisons were found for lateral incisors, showing a 57% prevalence.…”

“…Most of these researches showed that in mandibular incisors the prevalent configuration is Vertucci type I (only one canal), with a percentage ranging from 96,2% to 32,5% (mean value 64,3%). These contradictory data could be explained by the different methodologies adopted (Table 3), since only some studies were conducted with CBCT (35)(36)(37)(38)(39)(40)(41)(42)(43), and very few examined other clinically relevant parameters like confluences (44) and symmetry (45). Theoretically, there should be no significant differences between studies using CBCT or extracted teeth.…”

Root Canal Morphology of the Permanent Mandibular Incisors by Cone Beam Computed Tomography: A Systematic Review

“…Of these, 2219 were removed because of their being duplicates or not related to the study. Of the remaining 71 studies, 52 were removed due to lack of relevance, not using CBCT as their diagnostic methodology, or being in vitro trials, case studies or systematic reviews, leaving a total of 19 studies [8,14,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] (Figure 3. Flowchart).…”

“…When there were two canals, the most frequent classification was type III, with the exception of four studies [8,22,23,35]. There was no heterogeneity as to the frequency of the rest of configurations, with studies where the next most frequent configurations were type II [14,23,26,27,30,33,34], type V [8,[19][20][21]24,25,28,29,32], or type IV [31]. The remaining types [VI, VII and others] were generally present in very low or non-existent percentages.…”

“…Five studies reported symmetry between the incisors on the right and left side of the patient [8,19,20,23,26,33]. Lateral incisors showed a higher prevalence in the existence of a second canal compared to central incisors in fourteen studies [7,14,[20][21][22]25,[27][28][29][31][32][33][34][35]. The central incisor had a higher prevalence in only three [19,23,26].…”