This paper reports two clinical aids for the removal of broken instruments
in root canals using a combination of hand instrumentation and ultrasonic d
evices. This technique is based on two phases: hand instrumentation with st
ainless-steel K-file instruments for bypassing the fragments, and K-files m
ounted on an ultrasonic handpiece for loosening and retrieval of the broken
instruments. This method offers the following advantages: conservation of
the remaining dentin wall of the root canal and elimination of the necessit
y for surgical treatment.