Effects of ethanol addition on the water sorption/solubility and percent conversion of comonomers in model dental adhesives.
Effects of ethanol addition on the water sorption/solubility and percent conversion of comonomers in model dental adhesives.
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乙醇添加对模型牙齿胶粘剂中共聚物的水吸附/溶解度和百分比转化的影响。
DOI：
10.1016/j.dental.2009.03.015
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发表时间：
2009-10
期刊：
影响因子：
5
通讯作者：
Carrilho, Marcela R.
中科院分区：
文献类型：
--
作者：
Malacarne-Zanon, Juliana;Pashley, David H.;Agee, Kelli A.;Foulger, Stephen;Alves, Marcelo Correa;Breschi, Lorenzo;Cadenaro, Milena;Garcia, Fernanda P.;Carrilho, Marcela R.
这项研究评估了作为牙科粘结剂配方的纯树脂和乙醇溶剂树脂的吸水率和转化率的动力学。以亲水性已知且亲水性增加的5种甲基丙烯酸酯树脂(R1、R2、R3、R4和R5)为参照物。将树脂作为纯净的粘结剂(100%树脂)或用无水乙醇(95%树脂/5%乙醇或85%树脂/15%乙醇)进行溶剂化。将未固化的树脂分配到一个圆形模具(5.8 mm×0.8 mm)中制备试件。对80种S进行了光活化处理，用重量法评价了其吸水/扩散/溶解度，并用傅里叶变换红外光谱计算了转化率(DC)。共混物的吸水率随共混物亲水性的增加而增加。一般来说，与相应的纯树脂相比，溶剂化树脂表现出显著更高的吸水率、溶解度和水扩散系数(p<；0.05)。唯一的例外是树脂R1，这是最不亲水的树脂，在这种树脂中，纯净型和溶剂型的吸水性相似(p>；0.05)。乙醇的加入增加了所有受试树脂的DC，尤其是亲水性最低的树脂R1和R2(p<；0.05)。尽管以乙醇为溶剂的甲基丙烯酸酯树脂的DC增加，但这是以增加其吸水/扩散和溶解度为代价的。随着树脂共混物亲水性的增加，残留乙醇对吸水率/溶解度的负面影响似乎更大。也就是说，在牙科粘合剂中使用亲水性较低的树脂可能会对牙本质产生更可靠和持久的粘结。
This study evaluated the kinetics of water uptake and percent conversion in neat versus ethanol-solvated resins that were formulated to be used as dental bonding agents. Five methacrylate-based resins of known and increasing hydrophilicities (R1, R2, R3, R4 and R5) were used as reference materials. Resins were evaluated as neat bonding agents (100% resin) or they were solvated with absolute ethanol (95% resin/5% ethanol or 85% resin/15% ethanol). Specimens were prepared by dispensing the uncured resin into a circular mold (5.8 mm × 0.8 mm). Photo-activation was performed for 80 s. The water sorption/diffusion/solubility were gravimetrically evaluated, while the degree of conversion (DC) was calculated by Fourier-transform infrared spectroscopy. Water sorption increased with the hydrophilicity of the resin blends. In general, the solvated resins exhibited significantly higher water sorption, solubility and water diffusion coefficients when compared to their corresponding neat versions (p<0.05). The only exception was resin R1, the least hydrophilic resin, in which neat and solvated versions exhibited similar water sorptions (p>0.05). Addition of ethanol increased the DC of all tested resins, especially of the least hydrophilic, R1 and R2 (p<0.05). Despite the increased DC of ethanol–solvated methacrylate-based resins, it occurs at the expense of an increasing in their water sorption/diffusion and solubility values. Negative effects of residual ethanol on water sorption/solubility appeared to be greater as the hydrophilicity of the resin blends increased. That is, the use of less hydrophilic resins in dental adhesives may create more reliable and durable bonds to dentin.
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影响因子：
14
作者：
Ito, S;Hashimoto, M;Pashley, DH
通讯作者：
Pashley, DH
影响因子：
5
作者：
Cadenaro, Milena;Breschi, Lorenzo;Pashley, David H.
通讯作者：
Pashley, David H.
影响因子：
5
作者：
JACOBSEN, T;SODERHOLM, KJ
通讯作者：
SODERHOLM, KJ
影响因子：
4.4
作者：
Carvalho, RM;Pegoraro, TA;Pashley, DH
通讯作者：
Pashley, DH
影响因子：
5
作者：
Chersoni, S;Suppa, P;Prati, C
通讯作者：
Prati, C