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论文摘要

生物活性玻璃改性树脂粘接剂对牙本质脱矿及树脂粘接强度的影响

Effects of dentin demineralization and bond-strength properties of bioactive glass containing resin adhesive

作者:王瑜 龚玲 计艳 郑丽纯 陈嵩

Author:Wang Yu, Gong Ling, Ji Yan, Zheng Lichun, Chen Song

收稿日期:          年卷(期)页码:2016,34(4):350-350-353

期刊名称:华西口腔医学杂志

Journal Name:West China Journal of Stomatology

关键字:生物活性玻璃, 树脂粘接剂, 牙本质, pH值, 粘接强度,

Key words:bioactive glass, resin adhesive, dentin, pH value, bond strength ,

基金项目:

南京市医学科技发展项目(YKK14111)

中文摘要

目的 研究生物活性玻璃(BG)改性树脂粘接剂抑制牙本质脱矿及对树脂-牙本质微拉伸粘接强度的影响。方法 将硅烷偶联剂表面处理后的BG与Single Bond 2粘接剂混合制备出30%、40%和50%的BG改性的树脂粘接剂,选择上颌前磨牙40颗,随机分为4组,阴性对照组(不添加BG)、30%BG组、40%BG组、50%BG组,每组10颗。根据分组分别采用相应BG含量的粘接剂制备树脂-牙本质粘接试件。将制备的粘接试件在37 ℃水浴中浸泡24 h后进行微拉伸粘接强度测试。每组选择1个牙片浸泡在pH 4.0的人工唾液中1周,每24 h测试溶液的pH值。结果 阴性对照组、30%BG组、40%BG组、50%BG组的粘接强度分别为(27.76±0.29)、(27.05±0.58)、(26.95±0.69)和(25.12±0.24)MPa。对照组和30%BG组的粘接强度无统计学差异(P=0.06),和40%BG组、50%BG组有统计学差异(P=0.04,P=0.00);30%、40%BG组的粘接强度高于50%BG组(P=0.00,P=0.00)。随着BG含量的增加,pH值也逐渐增高。结论 含有BG的树脂粘接剂可以有效抑制牙本质的脱矿,30%BG组对短期的粘接强度无明显影响,50%BG组抑制脱矿能力最强,但是粘接强度较低。

英文摘要

Objective This study investigated the shear bond strength and the ability of resin adhesive containing different amounts of bioactive glass (BG) to prevent dentin demineralization.Methods BG bonds at 30%, 40%, and 50% concentrations comprised a mixture of coupling agents modifying BG and Single Bond 2. Forty permanent premolars extracted for orthodontic treatment were randomly divided into four groups, namely, control group (BG-free), 30% BG group, 40% BG group, and 50% BG group. Composite resin and dentin were prepared into bonding specimens by using respective adhesives and then immersed in artificial saliva at pH 4 for 1 week. Changes in the pH values of the solution were measured every 24 h. The microtensile bond strength (TBS) of each specimen was examined after immersion in distilled water at 37 °C for 24 h.Results The TBS values of the control group, 30% BG group, 40% BG group, and 50% BG group were (27.76±0.29), (27.05±0.58), (26.95±0.69), and (25.12±0.24) MPa, respectively. The TBS of the control group was not significantly different from that of the 30% BG group (P=0.06) but significantly higher than that of the 40% BG and 50% BG groups (P=0.04 and P=0.00, respectively). In addition, TBS was significantly higher in the 30% BG and 40% BG groups than in the 50% BG group (P= 0.00 and P=0.00, respectively). The pH values of the solution increased with increasing BG content.Conclusion BG bonds are useful in the prevention of dentin demineralization. However, in this study, the 30% BG group did not affect the shortterm bond strength. The 50% BG group displayed the optimum ability to inhibit demineralization but showed the worst bond strength.

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