Donly K, Gomez C
Department of Pediatric Dentistry, University of Iowa, College of Dentistry, Iowa City 52242.
Quintessence Int. 1994 May;25(5):355-8.
The release of fluoride from a composite resin has been shown to inhibit enamel demineralization. The purpose of this study was to examine the remineralization effects of a fluoride-releasing resin. Twenty extracted molars were painted with an acid-protective varnish, excluding a 2 x 6-mm window. Artificial carieslike lesions were created in the exposed enamel with an acidified gel. A Class II preparation was restored with a fluoride-releasing or a non-fluoride-releasing composite resin. The teeth were sectioned longitudinally and photographed with polarized light microscopy in water and Thoulet's imbibition media. The sections were then painted with an acid-protective varnish, so that only the natural external surface of the lesion was exposed, and placed in separate closed environments of a nonfluoridated artificial saliva. Sections were removed after 2 weeks and 3 months and photographed under polarized light as before. A sonic digitizer was used to measure the area of the body of the lesion. Results demonstrated a statistically significant area reduction in the body of the lesions exposed to the fluoridated composite resin at 2-week and 3-month intervals.
复合树脂中氟的释放已被证明可抑制牙釉质脱矿。本研究的目的是检验含氟树脂的再矿化效果。20颗拔除的磨牙用防酸保护漆涂抹，留出一个2×6毫米的窗口。用酸化凝胶在暴露的牙釉质上制造人工龋样病变。用含氟或不含氟的复合树脂修复Ⅱ类洞。将牙齿纵向切片，在水中和Thoulet浸液介质中用偏光显微镜拍照。然后将切片涂上防酸保护漆，使仅病变的天然外表面暴露，置于未加氟的人工唾液的单独封闭环境中。在2周和3个月后取出切片，如之前一样在偏光下拍照。使用声波数字化仪测量病变体部的面积。结果表明，在2周和3个月的间隔时间里，暴露于含氟复合树脂的病变体部面积有统计学意义的减小。
