In vivo sealing ability of calcium hydroxide-containing root canal sealers.
It was the purpose of this study to determine the sealing ability of 2 commercially available calcium hydroxide-containing root canal sealers, CRCS and Sealapex. One hundred sixty single-rooted human teeth were used. The clinical crowns were removed and the roots were cleaned mechanically and by immersion for 24 h in 5% sodium hypochlorite. The root canals were then instrumented to size 80 at the apical foramen and the roots were sterilized by gamma-radiation. Under aseptic conditions the root canals were filled with a gutta-percha master cone size 70 and Sealapex (48 roots), CRCS (48 roots), and a zinc oxide-eugenol type sealer, Roth 801 (50 roots). The coronal aspects of the root canals were then sealed with zinc oxide-eugenol cement. In order to bring the roots and root filling materials in contact with tissue and tissue fluids, the roots were implanted subcutaneously in rabbits for 90 days and 1 year. Leakage as demonstrated by penetration of India ink was evaluated using a stereomicroscope. The best results were obtained with CRCS. Significantly less leakage occurred with both calcium hydroxide-containing sealers than with the traditional zinc oxide-eugenol sealer.
Barnett
F
F
Trope
M
M
Rooney
J
J
Tronstad
L
L
D002126:Calcium Hydroxide; D003763:Dental Leakage / Q000517:prevention & control*; D006801:Humans; D012389:Root Canal Obturation; D012459:Salicylates; D015035:Zinc Oxide-Eugenol Cement
D012459:Salicylates; D015035:Zinc Oxide-Eugenol Cement; C055601:Sealapex; D002126:Calcium Hydroxide