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Effect of bleaching time and temperature on the radicular penetration of hydrogen peroxide
Author(s) -
Rotstein Ilan,
Torek Yarom,
Lewinstein Israel
Publication year - 1991
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.1600-9657.1991.tb00435.x
Subject(s) - hydrogen peroxide , oxidizing agent , penetration (warfare) , chemistry , peroxide , nuclear chemistry , organic chemistry , engineering , operations research
Extracted human premolars were treated endodontically and bleached intracoronally. The teeth were bleached with 30% hydrogen peroxide for periods of 5, 20, 40 and 60 min at temperatures of 24°C, 37°C and 47°C. A correlation for both bleaching time and temperature and the radicular penetration of hydrogen peroxide was found. No penetration was found after 5 min bleaching at any of the temperatures tested. Prolonging the bleaching time after 5 min increased the hydrogen peroxide penetration at each of the temperatures tested. A rise in the bleaching temperature also increased the hydrogen peroxide penetration although not significantly for all tested periods. It is therefore suggested to minimize the bleaching time and temperature when hydrogen peroxide is used as the oxidizing agent. Bleaching should be limited to separate 5‐min periods rather than being performed over a long continous period.