In crown down technique:: (A) K file is used without reaming motion pressure., (B) K file is used with a reaming motion and no apical pressure., (C) Both can be done., (D) None of the above.
Answer is B. Crown-Down Pressureless Technique: This technique was suggested by Marshall and Pappin. Early coronal flaring with Gates-Glidden drills is followed by an incremental removal of dentin from coronal to apical direction, and hence called “Crown-down technique. Straight K-files are then used in a large to small sequence with a reaming motion and no apical pressure – hence called “Pressureless” technique.