الفهرس 
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Abstract
This study evaluated the effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) either applied combined with or under glass ionomer on shear bond strength of nano ionomers, highly viscous glass ionomer and resin modified glass ionomer restoratives to dentine. Materials and methods: 90 sound human premolars were divided into three groups: 30 teeth each, according to treatment protocol either without application of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) (as a control group), CPP-ACP applied before application of glass ionomer and CPP-ACP combined with the glass ionomer. Each group was subdivided into three subgroups, 10 teeth each, according to type of glass ionomer either nano ionomer, highly viscous glass ionomer or resin modified glass ionomer was used. Results: when CPP-ACP was applied before glass ionomer; Ketac N100 showed the highest statistical mean shear bond strength followed by Vitremer which produced an insignificant effect with other types followed by Ketac Molar Easymix which produced the lowest shear bond strength values. When mixed with glass ionomer No significant interaction between different tested glass ionomer types. Conclusion: CPP-ACP weather applied before or combined with the different glass ionomers has no effect on the shear bond strength to dentine.