Microhardness of dentin underneath fluoride-releasing adhesive systems subjected to cariogenic challenge and fluoride therapy.
Microhardness of dentin underneath fluoride-releasing adhesive systems subjected to cariogenic challenge and fluoride therapy.
复制标题
经致龋挑战和氟化物治疗后，释放氟化物的粘合剂系统下的牙本质的显微硬度。
DOI：
10.1016/j.jdent.2010.02.006
复制
发表时间：
2010
影响因子：
4.4
通讯作者：
E. M. Souza
中科院分区：
文献类型：
--
作者：
G. A. Kirsten;Marcos Kenzo Takahashi;R. Rached;M. Giannini;E. M. Souza
本研究的目的是评估使用氟释放粘合剂系统的复合牙本质的粘接界面的显微硬度提交的pH循环方案相关或不氟化物therapeutis. METHODSTirty人第三磨牙准备与V类洞与牙本质颈缘。粘合剂系统One-Up Bond F Plus（PB）、Prime&Bond NT（NT）、Clearfil Protect Bond（CF）、Optibond Solo Plus（OP）以及对照[-] Single Bond 2（SB）和[+] Ketac Molar（KM）先前用于复合树脂固化。将沉淀物切成四块，并置于不同的储存介质中15天：蒸馏水、pH循环、与NaF 0.05%相关的pH循环和与NaF 1.23%相关的pH循环。在距粘接界面50、100、150和300μm处进行努氏显微硬度测试。通过三因素方差分析和Tukey HSD检验分析数据（p<0.05）。当与50μm的所有粘合剂系统相比时，除了在单独进行pH循环或与1.23%NaF结合时与KM相似的KTM之外，KTM TSKM导致显著更高的显微硬度。当pH循环与NaF 0.05%相关时，所有测试材料的牙本质在50μm和100μm深度处的显微硬度显著较高。结论0.05%NaF溶液对致龋牙本质进行处理后，可使牙本质在50 μ m和100μm处的显微硬度恢复到正常水平。
OBJECTIVESThe aim of this study was to evaluate the microhardness of dentin subjacent to the bonding interface of composite restorations using fluoride-releasing adhesive systems submitted to pH-cycling regimen associated or not to fluoride therapies.METHODSThirty human third molars were prepared with class V cavities with dentin cervical margins. The adhesive systems One-Up Bond F Plus (OU), Prime&Bond NT (NT), Clearfil Protect Bond (CF), Optibond Solo Plus (OP) and also the controls [−] Single Bond 2 (SB) and [+] Ketac Molar (KM) were used previously to composite resin restorations. The restorations were sectioned into four slabs and submitted to different storage media for 15 days: distilled water, pH-cycling, pH-cycling associated to NaF 0.05% and associated to NaF 1.23%. The Knoop microhardness test was performed in dentin at 50, 100, 150 and 300μm from the adhesive interface. Data was analyzed by three-way ANOVA and Tukey HSD test (p<0.05).RESULTSKM resulted in significantly higher microhardness when compared to all the adhesive systems at 50μm, with the exception of OU, that was similar to KM when submitted to pH-cycling alone or associated to 1.23% NaF. Microhardness of dentin was significantly higher with all the tested materials, when pH-cycling was associated to NaF 0.05%, at 50μm and 100μm depths. OU resulted in similar dentin hardness at all depths and storage media.CONCLUSIONSThe incorporation of NaF 0.05% fluoride therapy to the cariogenic challenge was capable to recover the original microhardness of dentin at 50 and 100μm with all the tested materials.