Australian Dental Council (ADC) Test 2025 – 400 Free Practice Questions to Pass the Exam

Using a barbed broach in narrow canals carries the risk of breakage due to the small barbs that can become engaged with the canal walls. The barbs are designed to grip and remove debris from the canal. However, in narrow spaces, these barbs can create increased friction against the canal walls, which raises the likelihood of the instrument fracturing. This is particularly concerning because if a piece of the broach breaks off during the procedure, it can lead to complications, like potential obstruction of the canal or even necessitating surgical intervention to remove the fractured piece.

This concern is specific to the design of the barbed broach and the anatomy of narrow canals, where the small size and tight confines can generate stress on the instrument. The other options present different challenges or considerations but do not specifically highlight the fundamental mechanical risk associated with attempting to use this tool in narrow canal space.