Cehreli Z C, Yazici R, García-Godoy F
Department of Pediatric Dentistry, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
ASDC J Dent Child. 2000 Sep-Oct;67(5):330-7, 302.
This study evaluated the effect of a 1.23 percent APF gel on the surface morphological characteristics and surface roughness of one high-viscosity (Fuji IX GP), three polyacid-modified resin-based composites (Dyract AP, F2000 and Compoglass F) (PMRC), and two resin-modified glass-ionomer cements (Vitremer and Fuji II LC). A microfilled nonfluoridated resin-based composite (Silux Plus) was used as a control. All materials were handled according to the manufacturers' instructions. The fluoride gel used in the study was a 1.23 percent acidulated phosphate fluoride gel (APF) (Nupro APF). The specimens were repeatedly exposed to the APF gel with cotton applicators for a period that simulated the equivalent of 4 yrs (1 min/6 mo) under prophylactic fluoride treatment. Average surface roughness (Ra) of the control and treated specimens was measured. Three separate Ra measurements along the direction of rotation of the finishing and perpendicular to the finishing direction and edge of the mold were made for each specimen surface. In each group, specimens with Ra closest to the mean were removed from the molds, sputter-coated with gold and examined using a scanning electron microscope. The results showed that all tested materials, except Vitremer, displayed increased surface roughness values following APF treatment. However, this was not statistically significant for Compoglass F, Vitremer and Fuji II LC. Among PMRC materials, F2000 displayed the highest Ra average value, although the differences between F2000 and Dyract AP and of Compoglass F and Dyract AP was not statistically significant. Comparisons of the Ra values between Silux Plus and the other test materials revealed statistically significant differences except for Dyract AP and Compoglass F. No statistically significant difference was found between the Ra values of Vitremer and Fuji II LC following APF treatment. Among all groups, Fuji IX GP displayed the highest surface roughness.
本研究评估了1.23%的含氟防龋凝胶（APF凝胶）对一种高黏性材料（富士IX GP）、三种含氟复合树脂（Dyract AP、F2000和Compoglass F）（聚酸改性复合树脂，PMRC）以及两种树脂改性玻璃离子水门汀（Vitremer和富士II LC）的表面形态特征及表面粗糙度的影响。选用一种微填料型非含氟复合树脂（Silux Plus）作为对照。所有材料均按照制造商的说明进行处理。本研究中使用的含氟凝胶为1.23%的酸蚀磷酸氟凝胶（APF）（Nupro APF）。在预防性氟治疗条件下，用棉棒将标本反复暴露于APF凝胶中，暴露时间模拟4年（1分钟/6个月）。测量对照标本和处理后标本的平均表面粗糙度（Ra）。沿着修整方向并垂直于修整方向和模具边缘，对每个标本表面进行三次单独的Ra测量。在每组中，将Ra最接近平均值的标本从模具中取出，喷金后用扫描电子显微镜检查。结果显示，除Vitremer外，所有测试材料经APF处理后表面粗糙度值均增加。然而，对于Compoglass F、Vitremer和富士II LC，这在统计学上并不显著。在聚酸改性复合树脂材料中，F2000的Ra平均值最高，尽管F2000与Dyract AP以及Compoglass F与Dyract AP之间的差异在统计学上并不显著。Silux Plus与其他测试材料的Ra值比较显示，除Dyract AP和Compoglass F外，差异均具有统计学意义。APF处理后，Vitremer和富士II LC的Ra值之间未发现统计学上显著差异。在所有组中，富士IX GP的表面粗糙度最高。
