Abstract
To explore the effects of infiltration resin, casein phosphate polypeptide-amorphous calcium phosphate (CPP-ACP) and fluoride on microhardness and micromorphology of irradiated enamel. Sixty human permanent teeth were mesiodistally sectioned, yielding 120 enamel samples, which randomly divided into 8 groups: G1: blank control; G2: irradiation control; G3: irradiation+fluoride; G4: irradiation+CPP-ACP; G5: irradiation+CPP-ACP+fluoride; G6: irradiation+infiltration resin; G7: irradiation+infiltration resin+fluoride; G8: irradiation+infiltration resin+CPP-ACP. A progressive improvement was observed on the superficial morphology of enamel treated with different anti-caries procedures. The order of microhardness values after irradiation from the highest to the lowest was as follows: G1>G8~G7>G6>G5>G4~G3>G2. CPP-ACP, infiltration resin and fluoride can effectively restore the direct destruction of enamel caused by irradiation and promote the occurrence of remineralization. Infiltration resin and its combined effects with fluoride or CPP-ACP have the most potential anti-caries agent to resist radiation-caries.
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