Abstract
In the prezent study, the caries inhibitory effects on artificial enamel caries to which both Nd: YAG laser and APF had been applied were examined.
enamel surfaces of human young premolars were used. Artificial enamel caries of young premolars were treated by following procedures.
Group 1); No treated. Group 2); APF was applied for 4 minutes at 37°C. Group 3); AOQ-Nd: YAG laser was irradiated with 65J/cm2 energy. Group 4) AOQ-Nd: YAG laser was irradiated after APF application. Group 5); APF was applied after Nd: YAG irradiation. Then all samples were exposed to 0.1 ml HC104 solution for 20 seconds by 5 times and amounts of Ca and F in each HC104 solution were determined. Another way, enamel surfaces of treated samples were observed with SEM.
The results were as follows.
(1) Inhibitory effect on enamel demineralization was most paticularly in Group 5) samples.
(2) The content of F were high in Group3) and 4) samples.
(3) It was seemed that there were fluoride-rich reaction products on the enamel surfaces of Group 2) and 4) samples by SEM observasion.
