Fig. 4From: Effect of hydroxyapatite nanoparticles on enamel remineralization and estimation of fissure sealant bond strength to remineralized tooth surfaces: an in vitro studySEM image of nano-HA (0.03%) deposition on the tooth surface, showing absence of nanoparticle infiltration in some areas (group 3). The white arrow shows the non-infiltrated area. The black arrow and circle show the infiltrated areaBack to article page