The current thinking is that provided the principles of root canal preparation and filling are observed, there is no justification for the use of therapeutic sealers. The active ingredient in the majority of medicated sealers is paraformaldehyde, which is usually accompanied by a corticosteroid. Figure 24 shows a medicolegal case where excess medicated sealer entered the inferior dental canal, causing permanent nerve damage with paraesthesia of the lip and soft tissues. Saturday, October 1, 2011
Medicated
The current thinking is that provided the principles of root canal preparation and filling are observed, there is no justification for the use of therapeutic sealers. The active ingredient in the majority of medicated sealers is paraformaldehyde, which is usually accompanied by a corticosteroid. Figure 24 shows a medicolegal case where excess medicated sealer entered the inferior dental canal, causing permanent nerve damage with paraesthesia of the lip and soft tissues.