Class-Ionomer cements include calcium aluminosilicate glass and fluid component of acrylic acid.  An important property of these cements is chemical adhesion to enamel and dentin and releasing anti-caries fluride. Clinical use of these cements involves filling erosions without cavity preparation, preventive dentistry and filling class V and llI cavities. In addition, another desirable property of these cements is their biocompatibility with tissues and dental pulp.