IADR Abstract Archives
The Incidence of Root Canal Classification and Ramifications Using μCT
Objectives: The aim of this study was to investigate and compare by microcomputed tomography (μCT) the frequency of root canals classification and their ramifications according to Pucci&Reig (1944)(PR) and the American Association of Endodontists (2015)(AAE).
Methods: 500 extracted human teeth of each group (n=50) (maxillary/mandibular central and lateral incisors, canines, premolars and molars) were scanned using a μCT with isotropic resolution of 26.70μm. The cross-sections images reconstruction was performed and the visualization of the continuous slices in the transversal axis of the specimen were performed using DataViewer software. The root canals were classified according PR (main, collateral, lateral, secondary, accessory, recurrent and reticular canals, intercanal and apical deltas) and AAE (main, accessory and lateral canals and apical deltas). The prevalence of apical deltas was evaluated using the chi-square test (p<0.05).
Results: A higher incidence of lateral canals were observed in maxillary canines (10%), central incisors (8%) and premolars (6%) according to PR, and a greater presence of lateral canals in the mandibular premolars (85%), molars (84%), lateral incisors (67%) and canines (59%) and in maxillary premolars (52%) according to AAE. Regarding to accessory canals, the PR showed a frequency in 2% of the maxillary lateral incisors and maxillary and mandibular premolars and 3% of mandibular molars. On the other hand, the AAE presented the highest incidence of accessory canals in 86% of the maxillary premolars, 71% in mandibular lateral incisors, 69% in mandibular premolars, 65% in mandibular canines and 56% in maxillary canines. The PR showed the lowest incidence of apical deltas for all dental groups when compared to AAE (p=0.004). When teeth group were evaluated, only DB-canals in maxillary molars showed statistical difference between the classifications (p=0.027).
Conclusions: The μCT acuity allowed the root canals classification and their ramifications and showed differences between Pucci & Reig and AAE classifications.
Methods: 500 extracted human teeth of each group (n=50) (maxillary/mandibular central and lateral incisors, canines, premolars and molars) were scanned using a μCT with isotropic resolution of 26.70μm. The cross-sections images reconstruction was performed and the visualization of the continuous slices in the transversal axis of the specimen were performed using DataViewer software. The root canals were classified according PR (main, collateral, lateral, secondary, accessory, recurrent and reticular canals, intercanal and apical deltas) and AAE (main, accessory and lateral canals and apical deltas). The prevalence of apical deltas was evaluated using the chi-square test (p<0.05).
Results: A higher incidence of lateral canals were observed in maxillary canines (10%), central incisors (8%) and premolars (6%) according to PR, and a greater presence of lateral canals in the mandibular premolars (85%), molars (84%), lateral incisors (67%) and canines (59%) and in maxillary premolars (52%) according to AAE. Regarding to accessory canals, the PR showed a frequency in 2% of the maxillary lateral incisors and maxillary and mandibular premolars and 3% of mandibular molars. On the other hand, the AAE presented the highest incidence of accessory canals in 86% of the maxillary premolars, 71% in mandibular lateral incisors, 69% in mandibular premolars, 65% in mandibular canines and 56% in maxillary canines. The PR showed the lowest incidence of apical deltas for all dental groups when compared to AAE (p=0.004). When teeth group were evaluated, only DB-canals in maxillary molars showed statistical difference between the classifications (p=0.027).
Conclusions: The μCT acuity allowed the root canals classification and their ramifications and showed differences between Pucci & Reig and AAE classifications.