ผลของวัสดุบูรณะชนิดปลดปล่อยฟลูออไรด์ที่มีต่อการสูญเสียแร่ธาตุของรอยโรคจุดขาวที่สัมผัสอยู่กับวัสดุ : การศึกษาในห้องปฏิบัติการ / ฤดี สุมาลย์นพ = Effect of fluoride releasing materials on demineralization of adjacent white spot lesion : in vitro study / Ruedee Sumalnop
Compares the effect of three fluoride releasing materials on demineralization of adjacent proximal white spot lesions of permanent molars. The three experimental groups were resin-modified glass ionomer cement (Fuji II LCR capsule), polyacid-modified resin composite (CompoglassR Flow), fluoride containing resin composite (HeliomolarR and the control group using non-fluoride containing resin composite (Z 250R. Sixty specimens from permanent molars were sized into 2X4 square millimeters immersed in demineralizing solution for 96 hours to create subsurface white spot lesions. The enamel specimens were distributed into four groups by using the amount of calcium in demineralizing solution analyzed by atomic absorption spectrophotometer. Then the enamel specimens were mounted into direct proximal contact with each material and cycled in acid for 2.5 hours and in remineralizing solution for 21.5 hours, daily for 30 days. After pH-cycle, the enamel specimens were separated from materials and immersed in demineralizing solution for 96 hours. The amount of calcium from collected solution was analyzed. The result showed that calcium (mean +- S.D.) from demineralizing solution of Fuji II LCR capsule, CompoglassR Flow. HeliomolarR, and Z 250R were 220.32 +- 2.51, 221.18 +- 2.55, 224.05 +- 2.36 and 224.41 +- 4.34 micromole/cm[superscript 2], respectively. Using Mann-Whitney U Test to compare the average amount of calcium between each experimental group and the control group, the average amount of calcium of Fuji II LCR capsule and CompoglassR Flow had significantly less than Z 250R. Comparing average amount of calcium among the experimental groups by using Kruskal Wallis H Test and Mann-Whitney U Test, the average amount of calcium of Fuji II LCR capsule and CompoglassR Flow had significantly less than that of HeliomolarR. Therefore, the more releasing fluoride from material, the more effect on demineralization inhibition of adjacent white spot lesion. Nevertheless further laboratory and clinical study should be conducted.