Kula K, Kula T J
Departments of Pediatric Dentistry and Orthodontics, University of North Carolina at Chapel Hill, USA.
Pediatr Dent. 1995 Sep-Oct;17(5):356-61.
Some topical fluorides cause surface changes in dental materials. The purpose of this study was to compare the effects of a topical acidulated phosphate sodium fluoride (1.23% APF) foam with the effects of other topical fluorides on the surface of veneer porcelain. Forty porcelain specimens (Ceramco) were placed into eight groups (N = 5). Four groups were immersed in either 1.23% APF foam, 1.23% APF gel, 2.0% sodium fluoride (NaF) gel, or water (reference) for 1 min. The other four groups were immersed in one of the above agents for four 1-min immersions. The surface topography of two scanning electron micrographs of each specimen was scored visually by two raters and by computer digital analysis (CDA). Inter-rater reliability was r = 0.67 (intraclass correlation coefficient). There were no significant differences in the mean visual scores or CDA scores among any of the groups immersed for 1 min. Porcelain immersed 4 min in APF gel had significantly greater mean visual scores and CDA scores than the other treatments (P < or = 0.0001; one-way ANOVA and Tukey's Studentized Range Test). The average surface topography scores of veneer porcelain immersed for 1 min in 1.23% APF gel, 2.0% NaF gel, 1.23% APF foam, or water were not significantly different. Significantly greater surface topography scores occurred following 4 min of immersion in 1.23% APF gel than all other agents.
一些局部用氟化物会导致牙科材料表面发生变化。本研究的目的是比较局部用酸化磷酸氟化钠（1.23% APF）泡沫与其他局部用氟化物对饰面瓷表面的影响。将40个瓷标本（Ceramco）分成8组（每组n = 5）。4组分别浸入1.23% APF泡沫、1.23% APF凝胶、2.0%氟化钠（NaF）凝胶或水中（作为对照）1分钟。另外4组则分别浸入上述一种制剂中，每次浸泡1分钟，共浸泡4次。由两名评估者通过视觉和计算机数字分析（CDA）对每个标本的两张扫描电子显微镜图像的表面形貌进行评分。评估者间的可靠性为r = 0.67（组内相关系数）。浸泡1分钟的任何一组之间，平均视觉评分或CDA评分均无显著差异。在APF凝胶中浸泡4分钟的瓷标本，其平均视觉评分和CDA评分显著高于其他处理组（P≤0.0001；单因素方差分析和Tukey's学生化极差检验）。在1.23% APF凝胶、2.0% NaF凝胶、1.23% APF泡沫或水中浸泡1分钟的饰面瓷平均表面形貌评分无显著差异。在1.23% APF凝胶中浸泡4分钟后的表面形貌评分显著高于所有其他制剂处理后的评分。
