Kucukyilmaz Ebru, Savas Selcuk, Akcay Merve, Bolukbasi Basak
Department of Pediatric Dentistry, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey.
Lasers Surg Med. 2016 Jan;48(1):62-9. doi: 10.1002/lsm.22439. Epub 2016 Jan 4.
Cariostatic and preventive agents are applied to create caries-resistant dentin surfaces and may affect subsequent resin bonding. The aim of this study was to investigate the effect of different agents with and without Er:YAG laser irradiation on the microtensile bond strength (µTBS) of resin composite to sound dentin (SD) and caries-affected dentin (CAD), and to assess the morphological and chemical changes in the specimens.
Ninety-six extracted molar teeth were divided into a control group (deionized water) and two experimental groups (ammonium hexafluorosilicate [SiF], silver diamine fluoride [SDF]), that subdivided according to different conditions (SD, CAD, SD+laser irradiation, CAD+laser irradiation). After treatment procedures, the teeth were restored and the µTBS was tested with a universal testing machine. Morover, 144 teeth were prepared and after treatment modalities; morphological changes of the surface were investigated and elemental analyses were performed using scanning electron microscope/energy dispersive spectroscopy (SEM-EDS). The data were analyzed using Kruskal-Wallis and Mann-Whitney U tests.
SDF and SiF applications reduced the µTBS values in both the SD and CAD subgroups (P < 0.05). Laser irradiation increased the µTBS values in the SiF group and the values were adversely affected in the SDF group (P < 0.05). Fluoride content of the specimens increased in all of the treatment groups, compared with the control group. Silver content was detected only in the SDF group, and silicon was detected only in the SiF group.
The µTBS values of resin composite, surface morphology and chemical characteristics of dentin were affected by the material type, dentin condition and laser irradiation and the use of SiF and SDF solutions under the resin restorations do not seem appropriate.
防龋和预防药物用于创建抗龋牙本质表面，可能会影响后续的树脂粘结。本研究的目的是研究不同药物在有或没有Er:YAG激光照射的情况下对树脂复合材料与正常牙本质（SD）和龋损牙本质（CAD）的微拉伸粘结强度（µTBS）的影响，并评估标本的形态和化学变化。
96颗拔除的磨牙分为对照组（去离子水）和两个实验组（六氟硅酸铵[SiF]、氟化银胺[SDF]），每个实验组再根据不同条件（SD、CAD、SD+激光照射、CAD+激光照射）细分。经过处理程序后，对牙齿进行修复，并用万能试验机测试µTBS。此外，制备144颗牙齿并进行处理；使用扫描电子显微镜/能谱仪（SEM-EDS）研究表面的形态变化并进行元素分析。使用Kruskal-Wallis和Mann-Whitney U检验分析数据。
应用SDF和SiF降低了SD和CAD亚组的µTBS值（P < 0.05）。激光照射增加了SiF组的µTBS值，而SDF组的值受到不利影响（P < 0.05）。与对照组相比，所有治疗组标本的氟含量均增加。仅在SDF组中检测到银，仅在SiF组中检测到硅。
树脂复合材料的µTBS值、牙本质的表面形态和化学特性受材料类型、牙本质状况和激光照射的影响，在树脂修复体下使用SiF和SDF溶液似乎不合适。
