Comparison of intracoronal bleaching methods on teeth discolored by different antibiotic pastes

• DOI: 10.4103/1119-3077.183247
• Publication Date: 2016-06-07T11:45:48Z
• Authors: E Iriboz; BA Öztürk; S Körklü; B Tarcin; YG Berker; HS Öveçoğlu
• Keywords: Bleaching, minocycline, sodium perborate, spectrophotometric analysis, triple antibiotic paste; Hot Temperature; Ultrasonic Therapy; Minocycline; Hydrogen Peroxide; Anti-Bacterial Agents; Incisor; Bleaching Agents; Drug Combinations; Random Allocation; 03 medical and health sciences; 0302 clinical medicine; Ciprofloxacin; Metronidazole; Borates; Tooth Bleaching; Humans; Tooth Discoloration; Dental Pulp Cavity

To compare the bleaching efficacy of sodium perborate with different activation methods on crowns discolored by two different antibiotic pastes.Eighty-five extracted human incisors were prepared to size #30 using ProTaper rotary instruments. After chemomechanical preparation and irrigation procedures, the specimens received triple antibiotic paste (TAP, n = 40), minocycline paste (MP, n = 40), or calcium hydroxide (n = 5, control group) and coronally sealed with temporary filling material. Spectrophotometric readings were obtained on day 0-week 4. Data were analyzed with the Mann-Whitney U-test and Wilcoxon sign test (P < 0.05). Sodium perborate was then inserted into the pulp chambers of discolored teeth (four subgroups, n = 10) and activated by heat or ultrasonically using two different frequencies and times. Spectrophotometric readings were obtained on days 3-7. Data were analyzed by the Mann-Whitney U-test and Kruskal-Wallis test (P > 0.05).Both groups showed statistically significant coronal discoloration at each time interval (P < 0.01), but their final shades did not significantly differ between the groups (P > 0.05). Although the MP subgroups exhibited more bleaching than the TAP subgroups on days 3 and 7, the difference was not significant (P > 0.05). The bleaching results for the sodium perborate activation techniques did not significantly differ among groups (P > 0.05).Both antibiotic pastes induced crown discoloration that was reversible using all sodium perborate bleaching techniques.