[Comparative study of grind-resistance,corrosion,and adhesion of dental plaque on gallium and amalgam alloy's filling]

The adhesion of plaque on dental restorative between gallium alloy and amalgam alloy were compared.The results showed that plaque index and plaque account of gallium alloy was higher than those of amalgam,there was statistically significance(P<0.01).It was possible that secondary caries of gallium alloy's restorative may be higher than those of amalgam.One the other hand,the surface of restorative polished was necessary to improve the adhesion of plaque and to prevent the secondary caries.