Durability of Resin-Dentin Bonds to Water-vs. Ethanol-saturated Dentin
Durability of Resin-Dentin Bonds to Water-vs. Ethanol-saturated Dentin
复制标题
DOI：
10.1177/0022034508328910
复制
发表时间：
2009-02-01
影响因子：
7.6
通讯作者：
Pashley, D. H.
中科院分区：
文献类型：
--
作者：
Hosaka, K.;Nishitani, Y.;Pashley, D. H.
当在湿粘接过程中使用乙醇代替水时，可以产生更高的24小时树脂-牙本质粘接强度。这项体外研究检查了乙醇湿粘接是否可以在更长的时间内增加树脂-牙本质粘接的耐久性。五个越来越亲水性的实验树脂混合物粘结到酸蚀牙本质饱和水或乙醇。在复合材料堆积之后，将牙齿减少成梁以进行24小时微拉伸粘结强度评估，并在37摄氏度下进行3个月、6个月或12个月的水老化，然后进行额外的粘结强度测量。虽然水饱和的牙本质的大部分债券并没有随着时间的推移而改变，乙醇饱和的牙本质表现出较高的粘结强度，他们都没有随着时间的推移而下降。在乙醇湿粘合的混合层中，胶原纤维直径减小，纤维间距增加。乙醇湿粘合中粘合强度和耐久性的增加可能是由于胶原基质的更高的树脂吸收和更好的树脂密封，从而最大限度地减少内源性胶原溶解活性。
Higher 24-hour resin-dentin bond strengths are created when ethanol is used to replace water during wet bonding. This in vitro study examined if ethanol-wet-bonding can increase the durability of resin-dentin bonds over longer times. Five increasingly hydrophilic experimental resin blends were bonded to acid-etched dentin saturated with water or ethanol. Following composite build-ups, the teeth were reduced into beams for 24-hour microtensile bond strength evaluation, and for water-aging at 37 degrees C for 3, 6, or 12 months before additional bond strength measurements. Although most bonds made to water-saturated dentin did not change over time, those made to ethanol-saturated dentin exhibited higher bond strengths, and none of them fell over time. Decreased collagen fibrillar diameter and increased interfibrillar spacing were seen in hybrid layers created with ethanol-wet-bonding. Increases in bond strength and durability in ethanol-wet-bonding may be due to higher resin uptake and better resin sealing of the collagen matrix, thereby minimizing endogenous collagenolytic activities.