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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Influence of dentinal polyelectrolytes on wet demineralized dentin, a bonding substrate
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Influence of dentinal polyelectrolytes on wet demineralized dentin, a bonding substrate

机译：牙本质聚电解质对湿法脱矿牙本质（粘结基质）的影响

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The objective of this study was to show the influence of dissolved dentinal polyelectrolytes on the characteristics of dentin (bonding substrate) demineralized by citric acid in the absence or presence of ferric chloride. The demineralizing agent was an aqueous mixture of 0, 1, 3, or 10 percent ferric chloride in 10 percent citric acid (10-0, 10-1, 10-3, 10-10, respectively). The hypothesis was that the concentration of dissolved dentinal noncollagenous substances, mainly polyelectrolytes soluble in water, must be decreased by their aggregation with ferric ions, which changes the characteristics of demineralized dentin, the rates of demineralization, and dehydration. Cervical bovine dentin was prepared in 3 X 2 X 2-mm blocks, each weighing 20.0 +- 0.5 mg. The rate of demineralization was investigated by measuring the weight loss resulting from demineralization by immersion in 10 mL of conditioner at 2-h intervals. The dehydration rate of wet demineralized dentin was determined using two methods: (1) weight loss in a desiccator under 263 Pa pressure and (2) differential scanning calorimetry (DSC). Twenty, 12, 8, and 4 h were required to complete demineralization of the blocks with the 10-0, 10-1, 10-3, and 10-10 solutions, respectively. The 10-10 wet demineralized dentin showed the highest rate of dehydration, followed in descending order by the 10-3, 10-1, and 10-0 specimens. Ferric chloride in dentin conditioners provided both a higher rate of dentin demineralization and a higher dehydration rate of wet demineralized dentin. These results suggest that in the presence of ferric chloride, a decreasing amount of dissolved polyelectrolytes aggregated with ferric ions in the substrates may increase the permeability of dentin to water and citric acid. Improvement of monomer permeability is essential to the preparation of good hybridized dentin, providing a more stable and reliable bonding and also protecting the dentin and pulp from infection. A further study of bonding substrates is required in order to understand the role of hybridized dentin in improved dental treatment.
机译：这项研究的目的是显示在不存在或存在氯化铁的情况下，溶解的牙本质聚电解质对柠檬酸脱矿的牙本质（粘结基质）特性的影响。除盐剂是0、1、3或10％氯化铁与10％柠檬酸（分别为10-0、10-1、10-3、10-10）的水性混合物。假设是，溶解的牙本质非胶原物质（主要是可溶于水的聚电解质）的浓度必须通过它们与铁离子的聚集而降低，这会改变脱矿牙本质的特性，脱矿率和脱水。以3 X 2 X 2-mm的块制备宫颈牛牙本质，每块重20.0±0.5 mg。通过测量每2 h间隔浸入10 mL护发素中的脱盐引起的重量损失来研究脱盐率。使用两种方法确定湿法脱盐的牙本质的脱水率：（1）干燥器在263 Pa压力下的失重和（2）差示扫描量热法（DSC）。分别用10-0、10-1、10-3和10-10溶液完成块的脱矿质需要20、12、8和4小时。 10-10湿的脱矿质牙本质显示出最高的脱水率，其后依次是10-3、10-1和10-0标本。牙本质调理剂中的氯化铁提供了更高的牙本质脱矿率和更高的湿态脱盐牙本质的脱水率。这些结果表明，在氯化铁的存在下，与底物中的铁离子聚集的溶解的聚电解质的量减少，可能会增加牙本质对水和柠檬酸的渗透性。单体渗透性的提高对于制备良好的杂交牙本质至关重要，它提供了更稳定和可靠的结合，还可以保护牙本质和牙髓免受感染。为了了解杂交牙本质在改善牙科治疗中的作用，需要对粘结基质进行进一步的研究。

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