morphology and developmental anomalies
 found accessory canals
of the CS by CBCT in 51.7% of 1000 patients.
2019 Colombia 236 CBCT (Current study) Author Study objective de Oliveira- Presence of foramina and accessory canals
in the Santos et al.
Reported reviews claiming retrograde filling's necessity advocated that horizontal accessory canals
in the posterior dentition cannot be eliminated with conventional methods, remaining pulpal tissue can lead to relapse of infection, and periapical environment cannot be protected without retrograde filling (8, 24).
Mitchell, "Periodontal disease, accessory canals
and pulp pathosis," Journal of Periodontology, vol.
Moreover, the complexity of accessory canals
impedes achievement of appropriate/ideal canal preparation and obturation.
Indeed, the instruments (both manual and rotary) do not reach certain areas such as cracks, crevices, isthmus, accessory canals
and apical deltas [3, 4].
The flow of endodontic sealers may have an effect on obturation of accessory canals
and microspaces between master and accessory cones .
The consequence of an infected root canal space is, therefore, most likely to be apical periodontitis, as the toxins can only communicate with the periodontal tissues through the apical foramina or large accessory canals
. However, if the cemental layer is lost or damaged, the inflammatory stimulators can pass from an infected pulp space through the dentinal tubules into the surrounding periodontal ligament, which, in turn, sets up an inflammatory response.
Frequency, location, and direction of the lateral, secondary, and accessory canals
. J Endod.