Concentration for Double Acting of F^- to Fluorine Photochemical Reaction

我们用准分子激光同时作用(紫外区)和不同比例的F~-溶液(光化学反应)研究了牙釉质对F~+的吸收。这些釉质样本是从拔除的磨牙的四面表面抛光到200微米。实验分为F^-溶液和照射双作用组、F^-涂层组、照射组和对照组。使用248 nm KrF激光，激光能量为70mJ/cm~2500~5000次，加入0.1~4.0%氟离子溶液(NaF和MFP)。牙釉质标本用1M-KOH洗涤24小时后，用扫描电子显微镜和X射线光电子能谱对其表面进行观察，并进行耐酸性测试。将加入0.1M乳酸缓冲液(pH4.0，2mul)的醋酸纤维素膜贴在标本上1分钟。用扫描电子显微镜和X射线光电子能谱分析了洗脱液中钙的含量，结果表明光化学反应是由辐射引起的。两组间的耐酸性差异有统计学意义(P&lt；0.05，单因素方差分析)。从0.1%触发NaF为4.0时，双效FROUP组各组洗脱钙量为0.34~0.50mug，涂布组为0.55~0.69mug，照射组为0.59~0.77mug，对照组为0.65~0.88mug。含1%F^-(NaF)的双作用组耐酸性最强，耐酸性依次为涂布组、照射组、对照组。与对照组相比，本组有效率为51.0%。

We studied F^- uptake of enamels by simultaneously acting excimer laser irradiation (ultraviolet zone) and various percentages of F^- solution (photochemical reaction). These enamel specimens were polished up to 200mum from 4-faced surfaces of an extracted molar. They were divided into 4 groups the double acting group of F^- solution and irradiation, the group of F^- coating, the irradiation group, and the control group. The 248nm KrF laser consisting of 70mJ/cm^2 500-5,000 shots and 0.1-4.0% of F^- solution (NaF and MFP) was used. After washing out the enamel speciments with 1M-KOH for 24 hours, the surfaces were observed by SEM and XPS,and acid resistance was tested. Cellulose acetate menmbranes adding 0.1M Lactic acid buffer (pH4.0,2mul) were attached at the speciments for one minute. Eluted Ca amounts were analyzed by ICP.Because of the results of the SEM and XPS,it was suggested that photochemical reaction was induced by irradiation. There were significant differences of acid resistance among the groups (p<0.05, one way ANOVA). Eluted Ca amounts of each group which triggered NaF of 4.0 from 0.1% was 0.34-0.50mug with the double acting froup, 0.55-0.69mug with the coating group, 0.59-0.77mug with the irradiation group, and 0.65-0.88mug with the control group. The double acting group with 1%F^- (NaF) was strongest, with acid resistance tending to be weaker in order of the coating group, the irradiation group, and the control group. This group showed a 51.0% effect compared with the control group.