Integrating nanohydroxyl apatite particles in resin infiltrant is a promising route for treatment of dental caries. This study is aimed to assess the effect of nanohydroxy apatite incorporation into the resin infiltrant on its properties. Materials and methods: The total sample size in the three groups was 60 specimens. The specimens were randomly divided in three main groups (ICON, ICON + 5% NHA, ICON + 10% NHA). Water sorption and solubility were evaluated as defined by ISO 4049 specification. The color stability specimens were evaluated with spectrophotometer. Color change was calculated to determine the extent of color stability between the tested groups. Results: a statistically significant difference was observed among the tested groups relating to the water sorption, solubility and the color stability. Conclusion: This study offers a promising route to greatly enhance resin infiltration treatment regarding its durability and color stability.
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