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  • Title: Prevention of secondary caries using silver diamine fluoride treatment and casein phosphopeptide-amorphous calcium phosphate modified glass-ionomer cement.
    Author: Zhao IS, Mei ML, Burrow MF, Lo EC, Chu CH.
    Journal: J Dent; 2017 Feb; 57():38-44. PubMed ID: 27939657.
    Abstract:
    OBJECTIVE: To study the effect of silver diamine fluoride (SDF) treatment and incorporating casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) into a glass-ionomer cement (GIC) to prevent secondary caries. METHOD: A cervical cavity was prepared on 32 premolars for the following restoration groups: group 1, conventional GIC restoration; group 2, SDF (38%) treatment and conventional GIC restoration; group 3, CPP-ACP (3%) modified GIC; and group 4, SDF treatment and CPP-ACP modified GIC. The restored teeth were thermal-cycled before undergoing a multi-species cariogenic biofilm challenge. The restored teeth were examined by micro-computed tomography (micro-CT), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX) and Fourier transform infrared (FTIR) spectroscopy. Data were analyzed by two-way ANOVA. RESULTS: Micro-CT determined outer lesion depths for groups 1-4 were: 123±6μm, 87±7μm, 79±3μm and 68±5μm respectively. An interaction effect on the outer lesion depth was found between the restorative materials and SDF treatment (p<0.001). Both SDF treatment and modification with CPP-ACP had a significant effect on outer lesion depth (p<0.001). SEM/EDX showed an increase of calcium and phosphorus at the root dentine adjacent to the restoration in groups 3 and 4 (CPP-ACP modified GIC). FTIR revealed that SDF treatment and CPP-ACP modified GIC had a significant effect on amide I-to-hydrogen phosphate ratio on the material-root interface (p=0.001). CONCLUSION: SDF treatment and incorporation of CPP-ACP into GIC restorative material can prevent secondary root caries development. CLINICAL SIGNIFICANCE: The results provide useful information to dentists in formulating clinical management protocols and material when treating root caries.
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