Comparative of flexural strength, hardness, and fluoride release of two bioactive restorative materials with RMGI and composite resin

Aim: This study was fulfilled to evaluate the flexural strength, micro-hardness, and release of two fluoride ions bioactive restorative materials (Cention N Activa Bioactive), a resin modified glass ionomer (Fuji II LC), composite (Filtek z250). Methods: Forty samples from four (Activa Bioactive, Fuji LC, Cention N, Filtek Z250) were provided according current standards ISO 4049/2000 guide lines. Subsequently, stored for 24 hours 6 months in artificial saliva, successively, strength micro-hardness measured. For each studied groups pH decreased 6.8 4 storage solution. The rate changes ion measured after three different periods hours, 48 distilled water, previous studies’ method. Two-way ANOVA, One-way Tukey HSD Pair wise comparisons, independent t-tests used analyze data (α= 0.05). Results: highest surface also month observed N(p<0.001).Flexural all significantly lower than hours(p<0.001). accumulative amount released RMGI, six-month period water considerably higher (p<0.001) storage. with increasing acidity environment (from 4) LC (p<0.05). Conclusion: RMGI increased against Bioactive,Cention Z250 composite. Storage saliva leads significant reduction micro hardness. behavior these materials, which are an acidic environment, dependent on type material.