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Quintessence Int 44 (2013), No. 8     15. July 2013
Quintessence Int 44 (2013), No. 8  (15.07.2013)

Page 601-607, doi:10.3290/j.qi.a29702, PubMed:23757457


Clinical comparison between two bleaching techniques: A 180-day follow-up study
Zhao, Ke / Zong, Li / Zhang, Qin / Att, Wael
Objective: The aim of this clinical study was to compare tooth shade, color rebound, and tooth sensitivity after using either a combined bleaching technique (CBT) or a deep bleaching technique (DBT) to lighten stained teeth. CBT is a two-stage bleaching process consisting of an initial in-office bleaching treatment session using 35% hydrogen peroxide (HP) followed by a 7-day at-home bleaching session with 6% HP. DBT involves a 7-day at-home bleaching session with 6% HP prior to the initiation of a two-stage CBT process.
Method and Materials: Thirty-six volunteers were recruited in this split-mouth design randomized clinical trial. Tooth shade was objectively evaluated by using a spectrophotom-eter and shade guide tabs. Tooth and gingival tissue sensitivity were self-evaluated by recording any tooth or gingival sensitivity on a daily basis.
Results: Both CBT and DBT presented satisfactory whitening effects. Although DBT resulted in a better shade change, the two bleaching techniques had a similar rebound effect. CBT was associated with a lower frequency of tooth sensitivity, but both bleaching techniques can be considered safe from a clinical standpoint.
Conclusion: The results indicate that CBT might potentially be preferred to whiten teeth, thus promoting the shade change, and avoiding gingival and tooth sensitivity.

Keywords: combined bleaching technique, deep bleaching technique, randomized controlled trial, tooth bleaching