Inhibition of enamel demineralization and bond-strength properties of bioactive glass containing 4-META/MMA-TBB-based resin adhesive
Inhibition of enamel demineralization and bond-strength properties of bioactive glass containing 4-META/MMA-TBB-based resin adhesive
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DOI：
10.1111/eos.12187
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发表时间：
2015-06-01
影响因子：
1.9
通讯作者：
Mizoguchi, Itaru
中科院分区：
文献类型：
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作者：
Kohda, Naohisa;Iijima, Masahiro;Mizoguchi, Itaru
研究了含不同量（0-50%）生物活性玻璃（BG）的4-甲基丙烯酸氧乙基偏苯三酸酐/甲基丙烯酸甲酯-三正丁基硼烷（4-META/MMA-TBB）基树脂的牙釉质防脱矿能力和剪切键合强度（SBS）性能。将圆盘状试样浸泡在蒸馏水中，用电感耦合等离子体原子发射光谱分析释放的离子。样品也浸泡在乳酸溶液（pH 4.6）中，以评估酸中和能力。用含bg的树脂将托槽粘接在人前臼齿上，将粘接后的牙齿交替浸入脱矿（pH值4.55）和再矿（pH值6.8）溶液中14d。采用纳米压痕法测定牙釉质硬度，距离牙釉质外表面20等距离。对每个样品的SBS进行了检查。随着BG含量的增加，离子释放量[钙（Ca）、钠（Na）、硅（Si）和硼(B)]和酸中和能力增加。交替浸渍后，在距离牙釉质表面1 ~ 18.5m的部分位置，与BG含量高的含BG树脂黏合后的牙釉质较其他组硬。含生物活性玻璃（10-40%）树脂的粘结强度与对照样品相当。因此，含bg树脂获得的SBS （6.5-9.2MPa）在临床上是可以接受的，说明该材料具有防止牙釉质脱矿的能力。
We investigated the enamel demineralization-prevention ability and shear bond strength (SBS) properties of 4-methacryloxyethyl trimellitic anhydride/methyl methacrylate-tri-n-butyl borane (4-META/MMA-TBB)-based resin containing various amounts (0-50%) of bioactive glass (BG). Disk-shaped specimens were immersed in distilled water and ions released were analysed by inductively coupled plasma atomic-emission spectroscopy. Samples were also immersed in lactic acid solution (pH 4.6) to estimate acid-neutralizing ability. Brackets were bonded to human premolars with BG-containing resins and the bonded teeth were alternately immersed in demineralizing (pH 4.55) and remineralizing (pH 6.8) solutions for 14d. The enamel hardness was determined by nanoindentation testing at twenty equidistant distances from the external surface. The SBS for each sample was examined. The amounts of ions released [calcium (Ca), sodium (Na), silicon (Si), and boron (B)] and the acid-neutralizing ability increased with increasing BG content. After alternating immersion, the specimens bonded with the BG-containing resin with high BG content were harder than those in the other groups in some locations 1-18.5m from the enamel surface. Bioactive glass-containing (10-40%) resin had bond strength equivalent to the control specimen. Thus, the SBS obtained for BG-containing resin (6.5-9.2MPa) was clinically acceptable, suggesting that this material has the ability to prevent enamel demineralization.