الفهرس 
Fluoride
Materials and MethodsOnly 14 pages are availabe for public view
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Abstract
Objective: fluorides have been proved to be one of the most effective weapons in still limited arsenal of anti caries agents in the last years however, the susceptibility of dental fluorosis and fluoride toxicity created the need for an alternative caries preventive and remineralizing agent as effective as fluoride or even better than it but without its harmful side effects. Nano hydroxyapatite was found to be the best alternative choice. The aim of the present study was to investigate and compare the remineralizing effect of nano-hydroxyapatite and acidulated phosphate fluoride on initial artificial enamel lesion. Methods: the current study included human eighty sound non-carious upper first premolars which were divided into four groups. group I contained 20 specimens, stored in artificial saliva for 10 days. group II contained 20 specimens which were subjected to demineralization then stored in artificial saliva for 10 days. group III contained 20 specimens which were demineralized, received 5 cycles of a 4 minute treatment with APF gel then immersed in artificial saliva for 2 days. This was repeated for ten days. group IV contained 20 specimens which were demineralized, treated with 10% aqueous slurry of n-HAp for 10 minutes then immersed in artificial saliva for 10 days. The specimens were then sectioned and examined using PLM, SEM, surface mineral content analysis and surface micro hardness analysis then statistical analysis was done to evaluate the results for each group and compare between group III and IV.