Lee S Y, Greener E H, Mueller H J, Chiu C H
Division of Biological Materials, Northwestern University Dental School, Chicago, IL 60611.
J Dent. 1994 Dec;22(6):352-9. doi: 10.1016/0300-5712(94)90088-4.
The effect of up to 30 days' immersion in 75% ethanol solution and in an artificial saliva (Moi-Stir) on the dentine shear bond strength (SBS) of three adhesive/composite systems (Tenure/Marathon One, Scotchbond Multi-Purpose/Z100 and Optibond/Herculite XRV) was evaluated. Two control series were stored either in 100% humidity or in air. Diametral tensile specimens (DTS) of the composites studied were stored in 75% ethanol for up to 30 days. The fracture mode and morphology of the failure interface were examined by scanning electron microscopy (SEM). Data were analysed using ANOVA and the Tukey LSD test. The SBS for all systems stored in Moi-Stir (24.8 +/- 3.0 MPa) and air (28.3 +/- 3.0 MPa) was not influenced by length of storage. Microscopic (SEM) examination of the debonded air, and Moi-Stir stored specimens showed that failure had primarily occurred through the dentine. Significant decreases (30-50%) in the SBS of all systems occurred after immersion in 75% ethanol. There was no significant difference among brands. The DTS of the composites showed significant decreases as a function of ethanol exposure. Marathon One and Herculite XRV showed significantly lower DTS after 14 days' storage while Z100 showed no reduction in DTS until after 30 days. The decrease in both SBS and DTS after storage in ethanol was a function of the square root of time (P < 0.001) and followed Fick's laws of diffusion. Ethanol diffusivity was approximated as 1.8 x 10(-6) cm2 s-1 for both SBS and DTS specimens, suggesting that alcohol attack in SBS specimens occurred primarily in the composite system.(ABSTRACT TRUNCATED AT 250 WORDS)
评估了将三种粘合剂/复合材料系统（Tenure/Marathon One、Scotchbond多功能/Z100和Optibond/Herculite XRV）在75%乙醇溶液和人工唾液（Moi-Stir）中浸泡长达30天对牙本质剪切粘结强度（SBS）的影响。两个对照组分别储存在100%湿度环境或空气中。所研究复合材料的直径拉伸试样（DTS）在75%乙醇中储存长达30天。通过扫描电子显微镜（SEM）检查失效界面的断裂模式和形态。使用方差分析和Tukey LSD检验分析数据。储存在Moi-Stir（24.8±3.0 MPa）和空气中（28.3±3.0 MPa）的所有系统的SBS不受储存时间的影响。对脱粘的空气和储存在Moi-Stir中的试样进行显微镜（SEM）检查表明，失效主要发生在牙本质中。所有系统在75%乙醇中浸泡后，SBS显著降低（30 - 50%）。各品牌之间无显著差异。复合材料的DTS随着乙醇暴露时间的增加而显著降低。Marathon One和Herculite XRV在储存14天后DTS显著降低，而Z100直到30天后DTS才降低。在乙醇中储存后SBS和DTS的降低是时间平方根的函数（P < 0.001），并遵循菲克扩散定律。对于SBS和DTS试样，乙醇扩散率约为1.8×10⁻⁶ cm² s⁻¹，这表明SBS试样中的酒精侵蚀主要发生在复合材料系统中。（摘要截断于250字）
