EFFECT OF FOOD AND ORAL SIMULATING FLUIDS ON STRUCTURE OF ADHESIVE COMPOSITE SYSTEMS
EFFECT OF FOOD AND ORAL SIMULATING FLUIDS ON STRUCTURE OF ADHESIVE COMPOSITE SYSTEMS
复制标题
DOI：
10.1016/0300-5712(95)90657-4
复制
发表时间：
1995-02-01
影响因子：
4.4
通讯作者：
MUELLER, HJ
中科院分区：
文献类型：
--
作者：
LEE, SY;GREENER, EH;MUELLER, HJ
这项工作评估了三种粘合剂/复合材料系统（Tenure/马拉松One、Scotchbond Multi-Purpose/Z100和Optibond/Herculite XRV）在浸入75%乙醇溶液和人工唾液（Moi-Stir）中后的降解情况。剪切粘结强度（SBS）和径向拉伸强度（SBS）的标本进行了这项研究。对于SBS试样，将粘结界面和复合材料在37 ℃下暴露于食物和口腔模拟流体长达30天。将类似的对照系列储存在空气中。在37 ℃下，在75%的乙醇中储存样本长达30天。SBS试样被剪切至失效。从断裂面的齿侧和复合材料的非断裂端去除少量粘结树脂，用于傅立叶变换红外显微镜评价。类似的刮屑取自试样表面。测定主峰的红外吸收强度（AI）作为储存时间的函数，并与芳香族C = C（1609.4 cm（-1））峰进行比值。使用方差分析和Tukey LSD检验分析数据。在所有检测期间，储存在空气中或Moi-Stir中的材料的主峰AI相似。在乙醇中储存导致粘结树脂样品的脂肪族C = C（1638 cm（-1））和O-H（类似于3500 cm（-1））键的AI显著降低（30-50%），而C = O键（1730 cm（-1））的AI增加（60-120%）。在两种复合材料试样中，脂肪族C = C和O-H减少了25-45%，而C = O在相同处理后增加了50-90%。对于粘结树脂和复合材料，脂肪族C=C键或O-H键的减少与C = O基团的增加相关（P < 0.001）。C = O键的增加是时间的幂函数（即（时间）（X），其中X在0.12至0.23之间变化（P < 0.001））。这表明一个复杂的，速率决定过程，如氢过氧化或酯交换。在1300和900 cm（-1）之间，AI与对照组相比增加（4-6倍）。该增加归因于随着树脂降解填充材料的暴露。
This work evaluates the degradation of three adhesive/composite systems (Tenure/Marathon One, Scotchbond Multi-Purpose/Z100 and Optibond/Herculite XRV) upon immersion in 75% ethanol solution and in an artificial saliva (Moi-Stir). Shear bond strength (SBS) and diametral tensile strength (DTS) specimens were employed for this study. For the SBS specimens, the bonded interface and composite were exposed to food and oral simulating fluids at 37 degrees C for up to 30 days. A similar control series was stored in air. DTS specimens were stored in 75% ethanol at 37 degrees C for up to 30 days. The SBS specimens were sheared to failure. Small quantities of bonding resin were removed from the tooth side of the fractured surface and from the non-fractured end of the composite for Fourier transform infrared microscopic evaluation. Similar scrapings were taken from DTS specimen surfaces. The infrared absorbance intensity (AI) of the major peaks was measured as a function of storage time and ratioed against the aromatic C = C (1609.4 cm(-1)) peak. The data were analysed using ANOVA and the Tukey LSD test. The AI of major peaks was similar for the materials stored either in air or in Moi-Stir for all testing periods. Storage in ethanol caused the AI of aliphatic C = C (1638 cm(-1)) and of O-H (similar to 3500 cm(-1)) bonds to significantly decrease (30-50%) for specimens of bonding resin while the AI of C = O bonds (1730 cm(-1)) increased (60-120%). In both composite specimens, there were similar 25-45% reductions in aliphatic C = C and in O-H, while C = O increased 50-90% after the same treatment. The decrease in aliphatic C=C bonds or O-H bonds correlates to increased C = O groups for both bonding resins and composites (P < 0.001). The increase in C = O bonds was a power function of time (i.e. (time)(X), where X varied from 0.12 to 0.23 (P < 0.001)). This suggests a complex, rate-determining process, such as hydroperoxidation or transesterification. An increase in AI (4-6 times) versus the control occurred between 1300 and 900 cm(-1). The increase was attributed to the exposure of filler material as the resin degraded.