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Dye leakage and SEM study of roots obturated with Thermafill and dentin bonding agent
Author(s) -
Mannocci F.,
Innocenti M.,
Bertelli E.,
Ferrari M.
Publication year - 1999
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1999.tb00754.x
Subject(s) - sodium hypochlorite , dentin , zinc oxide eugenol , smear layer , root canal , dentistry , adhesive , chemistry , seal (emblem) , materials science , composite material , layer (electronics) , medicine , art , visual arts , organic chemistry
— The apical seal of roots obturated with a dentin bonding agent and Thermafill with and without the use of sodium hypo‐chlorite as an irrigating solution was compared by a dye leakage test. Roots obturated with Thermafill and a zinc oxide eugenol sealer were used as controls. Thirty‐eight roots were prepared chemomech‐anically and divided into three experimental groups. The teeth of group 1 were filled with Thermafill and the dentin bonding agent using sodium hypochlorite as the irrigant. The teeth of group 2 were filled in the same way, but saline solution was used as the irrigant. Before the root canal was filled the smear layer was removed from the root canal walls of both groups by rinsing the root canal with a 17% EDTA solution. The teeth of group 3 were filled with Thermafill and a zinc oxide eugenol sealer. The teeth were immersed in 2% methylene blue solution. The root fillings of groups 1 and 2 leaked significantly more than those of group 3. The resin‐dentin‐guttaper‐cha interface of group 1 was observed by scanning electron microscopy and showed a typical hybrid layer. An intimate contact between resin and dentin was present in group 2, but a resin‐dentin inter‐diffusion zone was only occasionally observed. The use of dental adhesives and the hybrid layer formation did not improve the seal of Thermafill root canal Wings.