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KMID : 0355420160400020092
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Journal of Korean Academy of Oral Health
2016 Volume.40 No. 2 p.92 ~ p.99
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Evaluation of the whitening and remineralization effects of a mixture of amorphous calcium phosphate,hydroxyapatite and tetrasodium pyrophosphate on bovine enamel
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Lee Young-Eun
Park Dong-Ok
Jung Yun-Sook
Song Keun-Bae
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Abstract
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Objectives: The purpose of the present study was to evaluate the whitening effect, morphological and structural changes, and remineralization of the enamel induced by 3 combined agents: amorphous cal-cium phosphate (ACP), hydroxyapatite (HA), and tetrasodium pyrophosphate (TSP).
Methods: The study was performed on 90 bovine enamel slabs, which were divided into the 6 groups: negative control-distilled water (Group 1); positive control-opalescence F (Group 2); 10% mixed agent (Group 3); 25% mixed agent (Group 4); 50% mixed agent (Group 5); and 100% mixed agent (Group 6). Changes in the shade of the enamel slabs were evaluated using Shade Eye-NCC. Morphological changes were assessed by scanning electron microscopy (SEM) and confocal laser scanning micros-copy (CLSM) was used to determine the remineralizing effect of the three agents on enamel slabs.
Results: The change in shade of the enamel (ad*) was noted to increase significantly with increase in whitening frequency in all groups. The value of Δn* was significantly greater in all groups except for the negative control group (P<0.001). SEM revealed that the control group, Group 5, and Group 6 had similar morphologies. The fluorescence lesion areas in the 4 mixture-treated group were significantly smaller than those in the positive control group (P<0.001).
Conclusions: These results showed that the mixture of ACP, HA, and TSP was highly effective for bo-vine enamel whitening and acted by inducing the remineralization of enamel.Clinical significance: We evaluated the applicability of a new mixture containing ACP, HA, and TSP. This mixture would be highly useful in aesthetic dentistry because of its whitening efficiency, which does not compromise the enamel’s integrity.
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KEYWORD
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Amorphous calcium phosphate, Hydroxyapatite, Remineralization, Tetrasodium pyrophos-phate, Whitening
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