Effect of titanium dioxide and 3.5% hydrogen peroxide with 405-nm diode laser irradiation on bonding of resin to pulp chamber dentin
Effect of titanium dioxide and 3.5% hydrogen peroxide with 405-nm diode laser irradiation on bonding of resin to pulp chamber dentin
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DOI：
10.1134/s1054660x10070108
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发表时间：
2010-04-01
期刊：
影响因子：
1.2
通讯作者：
Oda, Y.
中科院分区：
文献类型：
--
作者：
Haruyama, A.;Kato, J.;Oda, Y.
研究了含二氧化钛的3.5%过氧化氢溶液对树脂与牙本质结合的影响。将拔出的牛前牙分为三组，每组10颗。暴露冠状唇牙髓腔牙本质，用3.5%过氧化氢加二氧化钛，405 nm二极管激光照射15 min（第一组）；30%双氧水加卤素灯照射15min（第二组）；蒸馏水浸泡15分钟（组3）。漂白后制备牙本质进行复合树脂粘接，扫描电镜观察树脂与牙本质的界面。测定了微拉伸粘结强度（mu TBS）和失效模式。1、2、3组的mu TBS值（平均+/- SD）分别为：17.28 +/- 5.79 MPa （n = 36）、0 MPa和26.50 +/- 9.83 MPa （n = 36）。第3组的mu TBS显著高于第1组（P < 0.05）。第1组和第3组在界面处观察到明显的杂化层和树脂标签，而第2组没有。1组以粘接剂失效为主，3组以牙本质失效为主。
This study was conducted to determine the effect of a 3.5% hydrogen peroxide solution containing titanium dioxide on bonding of resin to pulp chamber dentin. Extracted bovine anterior teeth were allocated to three groups of ten teeth each. The coronal labial pulp chamber dentin was exposed and bleached with 3.5% hydrogen peroxide with titanium dioxide with 405-nm diode laser irradiation for 15 min (Group 1); 30% hydrogen peroxide with halogen lamp irradiation for 15 min (Group 2); and distilled water for 15 min (Group 3). After bleaching, the pulp chamber dentin was prepared for composite resin bonding and the interface between the resin and dentin was observed by scanning electron microscopy. The microtensile bond strength (mu TBS) and failure patterns were determined. The mu TBS values (mean +/- SD) were: 17.28 +/- 5.79 MPa (n = 36), 0 MPa, and 26.50 +/- 9.83 MPa (n = 36) in Groups 1, 2, and 3, respectively. The mu TBS in Group 3 was significantly higher than that in Group 1 (P < 0.05). Hybrid layers and resin tags were clearly observed at the interface in Groups 1 and 3, but not in Group 2. Adhesive failure was mainly observed in Group 1, whereas dentin failure was the main failure pattern in Group 3.