The schematic illustration shown in the video visually compares a correct and an incorrect access cavity preparation, helping clinicians understand how minimal deviations in angulation or depth can lead to irreversible complications.
On the left, the proper drilling axis and depth are aligned with the tooth’s internal anatomy, preserving the integrity of the pulp chamber.
On the right, the drill deviates from the long axis, resulting in a lateral perforation that compromises the root structure and creates a potential pathway for infection.
By observing this schematic, viewers can clearly visualize the cause-and-effect sequence of procedural errors, reinforcing the importance of accurate orientation, controlled instrumentation, and constant awareness of tooth morphology throughout RCT.
This visual breakdown complements theoretical knowledge with a clear, practical understanding of endodontic precision and prevention of iatrogenic damage.
