Prevention Because the causes of VRF are well known, prevention is not
difficult. The cardinal rules for safety are to:
1. avoid excessive removal of intraradicular dentin; and
2. minimize internal wedging forces.
Compaction/condensation of root canal filling materials should be carefully
controlled. Posts weaken roots and should not be used unless they are
necessary to retain a foundation. (See Online Bonus Materials E and F for
more information.)