الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Dental caries is an infectious disease of bacterial etiology. The antibacterial properties of dental materials are becoming increasingly important in their overall biological evaluation. This antibacterial effect was correlated with the release of potential antibacterial elements from the materials . This study was designed to evaluate the antimicrobial effects of seven dental materials, one resin modified glass ionomer cement (vitremer), two compomer restorative materials (Hytac & F2000), one composite resin (Z100), three resin adhesives (Prime & Bond 2.1, Single Bond and One Step) against 4 species of microorganisms (Streptococcus mutans , Streptococcus sobrinus , lactobacillus casei, , and Actinomyces viscosus) . These microorganisms were isolated in pure culture from plaque samples taken from children referred to Pediatric Dentistry Clinic, Faculty of Dentistry, Mansoura University. Twenty six boys and 24 girls were included in this study with an age ranged from 6 to 12 years. The antibacterial effect of the materials were evaluated in the following manner: Agar diffusion test: the antibacterial effects in this test depend on