Lee S Y, Greener E H, Mueller H J
Division of Biological Materials, Northwestern University Dental School, Chicago, IL 60611.
J Dent. 1995 Feb;23(1):27-35. doi: 10.1016/0300-5712(95)90657-4.
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 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 (approximately 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%).(ABSTRACT TRUNCATED AT 250 WORDS)
本研究评估了三种粘合剂/复合材料体系（Tenure/Marathon One、Scotchbond多功能/Z100和Optibond/Herculite XRV）在浸入75%乙醇溶液和人工唾液（Moi-Stir）后的降解情况。本研究采用了剪切粘结强度（SBS）和径向拉伸强度（DTS）样本。对于SBS样本，粘结界面和复合材料在37℃下暴露于食物和口腔模拟液中长达30天。类似的对照组样本则保存在空气中。DTS样本在37℃的75%乙醇中保存长达30天。将SBS样本剪切至破坏。从断裂表面的牙齿侧和复合材料未断裂的断裂端去除少量粘结树脂，用于傅里叶变换红外显微镜评估。从DTS样本表面进行类似的刮取。测量主要峰的红外吸光度强度（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检验对数据进行分析。在所有测试期间，保存在空气中或Moi-Stir中的材料的主要峰的AI相似。对于粘结树脂样本，在乙醇中储存导致脂肪族C = C（1638 cm-1）和O-H（约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%）。（摘要截断于250字）
