Deionized water can substitute common bleaching agents for nonvital tooth bleaching when treated with non-thermal atmospheric plasma

• Published in: Journal of Oral Science 2019, Vol.61(1), pp.103-110
• Main Authors: Çelik, Burak, Çapar, İsmail D., İbiş, Fatma, Erdilek, Necdet, Ercan, Utku K.
• Format: Article
• Language: English
• Subjects: bleaching agent; Bleaching Agents - chemistry; blood-stained human teeth; Carbamide Peroxide - chemistry; Dentistry; Humans; Hydrogen Peroxide - chemistry; non-thermal atmospheric pressure plasma; nonvital tooth bleaching; Tooth Bleaching - methods; Tooth, Nonvital
• ISSN: 1343-4934; 1880-4926
• DOI: 10.2334/josnusd.17-0419

The bleaching efficacy of common bleaching agents and deionized water treated with non-thermal atmospheric pressure plasma in the pulp chamber for nonvital tooth bleaching was evaluated. A total of 120 extracted human maxillary first incisors were stained using human blood. Teeth were randomly divided into eight groups (n = 15). In the first four groups, teeth were bleached using 35% hydrogen peroxide gel, 37% carbamide peroxide gel, 2:1 (w/v) sodium perborate paste, and deionized water for 30 min. In the remaining groups, bleaching agents were treated with non-thermal atmospheric plasma for 5 min inside the pulp chamber. Overall color changes (∆E) were determined using Commission Internationale de L’Eclairage Lab Colour System. The plasma-assisted tooth bleaching has not increased tooth temperature beyond 37°C. Bleaching efficacies of bleaching agents were significantly improved when treated with non-thermal atmospheric plasma compared to their application (P < 0.05). A remarkable bleaching effect was obtained when bleaching agents were substituted with water and when treated with non-thermal atmospheric plasma. Non-thermal atmospheric plasma treatment could be a novel tool for activation of bleaching agents in the pulp chamber for nonvital tooth bleaching procedure. Moreover, water could be used as a novel bleaching agent when treated with the non-thermal atmospheric plasma to eliminate possible risks which might arise from peroxide-containing agents.