ProTaper Universal retreatment files are designed to be used in sequence to remove filling materials, such as gutta-percha, carrier-based obturators and paste fillers. ProTaper Universal Retreatment Files:
Designed to be used in sequence to remove filling materials
Three easily identified files are designed for the different needs of unfilling the canal before reshaping
The D1 file has a working tip that facilitates initial penetration
Each handle is no more than 11 mm for better visibility
