Abstract: The compositions of this invention posses both calcium hydroxide cement characteristics and light cure characteristics and hence strong bonds are likely to form with both the tooth and conventional filling materials. There is less likelihood that a filling may fall out of a cavity.The present invention provides a two component composition which comprises a first component comprising an ethylenically polymerizable compound which contains both a salicylate group and at least one acrylate, alkacrylate, acrylamide or alkacrylamide group and second component comprising calcium hydroxide or a suitable precursor to calcium hydroxide.