Addition of Zinc Oxide (Zno) nano particles on type II glass ionomer cements of surface roughness

Several studies on the addition of zinc oxide nanoparticles to type II glass ionomer cements showed an increase in compressive strength and the surface hardness of glass ionomer cements. The glass ionomer cement has a high roughness so that bacteria and plaque can be attached. The addition of zinc oxide nanoparticles affects the surface roughness of glass ionomer cement due to the distribution of smaller particles evenly and lower the average size of the glass ionomer cement. The aim of this study is to investigate the effect of zinc oxide nanoparticle application in different powder weight (0.1 g, 0.5 g, 1 g, and 1.5 gc) on increasing glass ionomer II cement surface roughness. Samples are made of type II glass ionomer cement was added with zinc oxide nanoparticles on a predetermined ratio and then mix with the liquid. The sample is placed on an ebonite mold that has been perforated with a diameter of 6 mm and a height of 2 mm. The surface of the sample is made as smooth as possible in order to measure surface roughness using the Hahn & Kolb Stuttgart Surface Roughness Tester tool. Zinc oxide nanoparticles on the addition of 0.1 grams and 0.5 grams of type II glass ionomer cements decreased surface roughness of type II glass ionomer cements. The addition of zinc oxide nanoparticles reduces the surface roughness of type II glass ionomer cement.