In vitro efficacy of sodium perborate preparations used for intracoronal bleaching of discolored non‐vital teeth

Abstract

Bleaching materials containing 30% hydrogen peroxide have been used successfully for the treatment of discolored non-vital teeth. Intracoronal application of these materials was occasionally associated with the development of external root resorption. Extracted human teeth with intact crowns were discolored in vitro and bleached with three preparations of sodium perborate. These preparations included: sodium perborate with 30% hydrogen peroxide, sodium perborate with 3% hydrogen peroxide and sodium perborate with water. The bleaching materials were placed in the pulp chamber of the discolored teeth and sealed with IRM for 14 days. They were replaced with fresh preparations after 3 and 7 days. The coronal tooth shades were evaluated after 3, 7 and 14 days and a comparison of the bleaching success of the groups was made at each interval. It was found that after 14 days and three bleachings there was no significant difference in success between the groups. It is therefore recommended that sodium perborate be used in combination with water rather than with hydrogen peroxide to reduce the risk of post-bleaching external root resorption.

Bleaching Teeth Treated Endodontically: Long-Term Evaluation of a Case Series

“…The mixture comprised sodium perborate and 120 volume hydrogen peroxide mixed to a paste on a sheet of glass (11,12) and was photocatalyzed in situ with a lamp (Illuminator, Union Broach, York, PA) used at 50% heat intensity. In all cases bleaching was accompanied by frequent washing with 5% sodium hypochlorite to potentiate the bleaching effect by liberating nascent oxygen.…”

Nonvital Tooth Bleaching: A Review of the Literature and Clinical Procedures

“…Rotstein et al (61,62) and Weiger et al (63) did not report any significant difference in the effectiveness between sodium perborate mixed with 3%-30% hydrogen peroxide and the sodium perborate-distilled water mixture. However, the whitening effect of the second mixture can take longer, so that more frequent changes of the bleaching agent might be necessary.…”

Hydrogen peroxide tooth-whitening (bleaching) products: Review of adverse effects and safety issues

“…29 In vitro studies have concluded that sodium perborate in water, sodium perborate in 3% and 30% hydrogen peroxide, and 10% carbamide peroxide are all efficient at internal bleaching of non-vital teeth. [30][31][32][33][34] Various heat sources may be applied to speed the reaction and improve the bleaching effect. 35 The medicament is sealed in the pulp chamber for three to seven days, and is thereafter replaced regularly until acceptable lightening is achieved.…”