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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Diffusion-induced water movement within resin-dentin bonds during bonding.
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Diffusion-induced water movement within resin-dentin bonds during bonding.

机译：粘结过程中树脂-牙本质键内的扩散引起的水运动。

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摘要

It is thought that water-filled channels and nanovoids in resin-dentin bonds represent potential sites for degradation of bonds or hydrolysis of collagen or both. How water gains access to bonded interfaces is not clear. This study evaluated the diffusion-induced water uptake through resin-dentin interfaces during bonding. Two light-cured total-etch adhesive systems (Excite and One-Step Plus) and a chemical-cured adhesive (Amalgambond Plus) were used in this study. Dentin disks were placed in a split-chamber device, and the fluid movement across dentin was measured, with and without a physiological pressure, during bonding procedures and 24 h after bonding. For light-cured adhesives in the experimental groups, a 6 min interval of dark storage was conducted prior to light-curing, to evaluate the diffusion of water through the uncured resin monomers, and to test the effect of prolonged infiltration time of adhesives on water permeability of bonds. Prolonged adhesive infiltration reduced the water permeability of resin-dentin bonds for light-cured adhesives. Water gradients produced by bonding systems contribute to water movement across the dentin-adhesive interfaces during bonding procedures. Differences in chemical formulations for adhesive systems may lead to differences in the extent of diffusion-induced water movement and the amount of water within the resin-dentin bonds.
机译：据认为，树脂-牙本质键中的充水通道和纳米空隙代表了键降解或胶原蛋白水解或两者的潜在位点。水如何进入键合界面尚不清楚。这项研究评估了粘结过程中通过树脂-牙本质界面扩散诱导的水分吸收。在这项研究中使用了两种光固化全蚀刻胶粘剂系统（Excite和One-Step Plus）和化学固化胶粘剂（Amalgambond Plus）。将牙本质盘放置在分开的腔室装置中，在粘结过程中和粘结后24小时内，在有或没有生理压力的情况下测量牙本质上的流体运动。对于实验组中的光固化胶粘剂，在光固化之前进行了6分钟的黑暗保存间隔，以评估水通过未固化的树脂单体的扩散，并测试胶粘剂延长的渗透时间对水的影响。键的渗透性。长时间的粘合剂渗透降低了光固化粘合剂的树脂-牙本质键的透水性。在粘结过程中，粘结系统产生的水梯度会促使水流过牙本质-粘合剂界面。粘合剂体系化学配方的不同可能会导致扩散诱导的水运动程度和树脂-牙本质键内的水量不同。

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