Iriboz E, Öztürk B A, Körklü S, Tarcin B, Berker Y G, Öveçoğlu H S
Department of Endodontics, Faculty of Dentistry, Marmara University, Istanbul, Turkey.
Department of Endodontics, Acibadem Hospital, Istanbul, Turkey.
Niger J Clin Pract. 2017 Jun;20(6):700-706. doi: 10.4103/1119-3077.183247.
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.
比较不同活化方法的过硼酸钠对两种不同抗生素糊剂致冠部变色的漂白效果。
使用ProTaper旋转器械将85颗拔除的人切牙预备至30号尺寸。经过化学机械预备和冲洗程序后，样本分别接受三联抗生素糊剂（TAP，n = 40）、米诺环素糊剂（MP，n = 40）或氢氧化钙（n = 5，对照组）处理，并用临时充填材料进行冠部封闭。在第0周 - 第4周进行分光光度读数。数据采用曼 - 惠特尼U检验和威尔科克森符号检验进行分析（P < 0.05）。然后将过硼酸钠插入变色牙的髓腔（四个亚组，n = 10），并通过加热或使用两种不同频率和时间的超声进行活化。在第3 - 7天进行分光光度读数。数据采用曼 - 惠特尼U检验和克鲁斯卡尔 - 沃利斯检验进行分析（P > 0.05）。
两组在每个时间间隔均显示出具有统计学意义的冠部变色（P < 0.01），但两组之间的最终色泽无显著差异（P > 0.05）。尽管在第3天和第7天，MP亚组比TAP亚组表现出更多的漂白效果，但差异不显著（P > 0.05）。过硼酸钠活化技术的漂白结果在各组之间无显著差异（P > 0.05）。
两种抗生素糊剂均会导致冠部变色，而所有过硼酸钠漂白技术均可使其逆转。
