Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Pedodontics

Aim or purpose: This study aims to evaluate the remineralization potential of ACTIVA Bioactive restorative material compared to light-cured resin-reinforced glass ionomer restorative. Materials and methods: A standardized Class V cavity was prepared in forty-two extracted sound human premolars.The mineral content of the teeth was measured before and after demineralization, then the demineralized teeth were left as a negative control (Group I) or restored with either ACTIVATM Bioactive restorative material (Group II) or light-cured resin-reinforced glass ionomer restorative (Group III). The teeth were stored in artificial saliva for 23 h and 1h in lactic acid solution at 37{u02DA}C to simulate the oral environment and the acid challenges occurring intraorally.The mineral content was evaluated using energy dispersive x-ray and scanning electron microscope (EDX/SEM) in each group after 24 h, 1month later, and after three months.Results: A significant statistical difference in fluoride and calcium release between the two groups was observed. Light-cured resin-reinforced glass ionomer restoration showed higher release of fluoride compared to ACTIVATM Bioactive restorative material while ACTIVATM Bioactive restorative material showed higher release of calcium compared to the light-cured resin-reinforced glass ionomer. There was no statistical difference in phosphorus release between the two tested materials. Phosphorus content was relatively similar in both groups

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