The remineralization aspect of enamel according to change of the degree of saturation of the organic acid buffering solution in pH 5.5

Abstract

The purpose of this study is to observe and compare the reminer alization tendencies of artificial enamelcaries lesion by remineralization solutions of different degree of saturations at pH 5.5, using a polarizingmicroscope and computer programs (Photoshop, Image pro plus, Scion Image, Excel).For this study, 48 sound permanent teeth with no signs of demin eralization, cracks, or dental restora-tions were used. The specimens were immersed in lactic acid demineralization solution for 2 days in orderto produce artificial dental caries that consist of surface and subsurface lesions. Each of 9 or 10 specimenswas immersed in pH 5.5 lactic acid buffering remineralization solution of four different degrees of satura-tion (0.507, 0.394, 0.301, and 0.251) for 12 days. After the de mineralization and remineralization, imageswere taken by a polarizing microscope (×100). The results were obtained by observing images of the speci-mens, and using computer programs, the density of caries lesions were estimated.While the group with the lowest degree of saturation (0.251) showed total remineralization feature fromthe surface to the subsurface of the lesion, the group with the highest degree of saturation (0.507) showeddemineralization mainly on the surface of the lesion at the constant organic acid concentration 0.01M and pH 5.5.