Cehreli Zafer C, Akca Taner, Altay Nil
Department of Pediatric Dentistry, Hacettepe University, Ankara, Turkey.
Am J Dent. 2003 Sep;16 Spec No:47A-50A.
To evaluate the bond strengths of three polyacid-modified resin composites and one resin-modified glass-ionomer cement to caries-simulated primary dentin after 18-months' water immersion.
Dyract AP, Compoglass F, F2000 and Vitremer were used as test materials. Standardized preparations cavities with a C-factor of 5 were prepared in primary molars. Half of the cavities were stored in a demineralizing media for 7 days to simulate caries-affected dentin. Thereafter, all preparations were restored with the test materials, after which the specimens were stored in water for 18 months, changing the water every week. The specimens were subjected to a microtensile test and all bond strength data (in MPa) were statistically analyzed using one-way analysis of variance (ANOVA) and Tukey HSD tests at P < 0.01.
The mean microtensile bond strength to normal primary dentin specimens were 11.2 +/- 1.5 (Dyract AP), 10.6 +/- 2.1 (Compoglass F), 10.8 +/- 1.1 (F2000) and 7.3 +/- 1.6 (Vitremer), while those to the caries-simulated dentin were 4.1 +/- 0.7 (Dyract AP), 3.0 +/- 0.6 (Compoglass F), 2.3 +/- 0.9 (F2000) and 1.9 +/- 0.5 (Vitremer). SEM evaluation of the unfractured specimens revealed evidence of gap formation in the adhesive interface in all samples.
评估三种聚酸改性树脂复合材料和一种树脂改性玻璃离子水门汀在经过18个月水浸后与模拟龋损的乳牙牙本质的粘结强度。
使用Dyract AP、Compoglass F、F2000和Vitremer作为测试材料。在乳磨牙上制备C因子为5的标准化窝洞。将一半窝洞置于脱矿介质中7天以模拟龋损牙本质。此后，所有制备的窝洞用测试材料进行修复，然后将标本置于水中18个月，每周换水。对标本进行微拉伸试验，并使用单因素方差分析（ANOVA）和Tukey HSD检验（P < 0.01）对所有粘结强度数据（以MPa为单位）进行统计分析。
与正常乳牙牙本质标本的平均微拉伸粘结强度分别为11.2±1.5（Dyract AP）、10.6±2.1（Compoglass F）、10.8±1.1（F2000）和7.3±1.6（Vitremer），而与模拟龋损牙本质的粘结强度分别为4.1±0.7（Dyract AP）、3.0±0.6（Compoglass F）、2.3±0.9（F2000）和1.9±0.5（Vitremer）。对未断裂标本的扫描电镜评估显示，所有样本的粘结界面均有间隙形成的迹象。
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