Root Canal Treatment / Endodontic therapy
The requirements of ideal root canal cement are:
Should provide an excellent seal when set.
Should produce adequate adhesion between the canal walls and the filling material.
Should be radiopaque.
Should be not stain.
Should be dimensionally stable.
Should be easily removed if needed and insoluble in tissue fluids.
Should be bactericidal or discourage bacterial growth and nonirritating to periapical tissue.
Following are the root canal cements used:
Zinc oxide Resin Cements - Most of the cements in common use contain zinc oxide resin as a base ingredient of the powder. This group consists of Grossman’s cement, Kerr root canal sealer, Kerr Tubli-seal etc.
Calcium Hydroxide Cement - The zinc oxide eugenol cements have been modified by incorporating calcium hydroxide. Sealapex, has been described as noneugenol, calcium hydroxide polymeric resin root canal sealer.
Paraformaldehyde cement - The basic ingredient of paraformaldehyde is zinc oxide but its other ingredient is paraformaldehyde, which is highly irritating and destructive to tissues. Therefore it is not an accepted root canal cement.
AH 26 - It is an epoxy resin containing nontoxic hardener. Its radiopacity is due to the presence of bismuth oxide. It has strong adhesive properties and it is well tolerated by periapical tissues.
Pastes - Resorbable paste, consists of base of zinc oxide eugenol and various chemical agents such as iodoform, camphorated phenol and para formaldehyde.