الفهرس 
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Abstract
Fluorine experiments proved useful in preventing tooth decay and re- precipitation of minerals in the teeth and the impact of fluorine depends on several factors, including normative solution , the concentration of fluorine in the solution , the ratio of the presence of carbonates .
The objective of the study :
This study was conducted to compare the re - deposition of minerals in tooth enamel layer by two sets of solutions re- deposition of metals , which vary in the concentration of fluorine and carbonate on the one hand and in the standardization of the concentration of the solution on the other.
The research plan :
Were collected (110) sprocket sound was Tnzifam and Kanhm to 0.5 mm were used ( 10) Court of them as a group .
While the rest to exposure Azah solution of metals Kmmathlh beginnings of decay.
الاستنتجات : 1 - re- deposition of metals solution that contains 20 Makromal of carbonates gives ترسيبا the largest of metals from the rest of the solutions that have been used .
2 - change the effect of fluorine on re- deposition of the presence of carbonate minerals in the solution and vice versa.
3 - There is a relationship between the concentration of fluorine and up standard solution .
Recommendations:
1 - the need for early detection of decay can even pause using solvents re - deposition of metals .
2 - When preparing solutions must take into account adjust the concentration of carbonates to get the best results.
3 - Use a solution containing .03 ppm from Aalflorin Ouzou normative 6.8 Aigafbdayat the Altsusumna a Amadaavat.