What is the primary role of lubricating gel in endodontic work, and what is a key caution?

• A. Stops instruments scraping against canal; do not use on files and reamers attached to a handpiece
• B. Dress canal before filling
• C. Lubricates canal to slide files
• D. Dry canal

Answer: (A)

Lubricating gel is used to reduce friction between the endodontic instrument and the canal walls, so files can glide more easily, negotiate curves, and progress with less binding or resistance. A key caution is to avoid applying lubricant to files or reamers that are attached to a handpiece; when a file is rotating, gel can cause slipping or unpredictable movement and complicate control. In practice, lubrication aids manual insertion and advance of the instrument, while other steps like dressing the canal before filling or drying the canal come later in the procedure.