An aqueous dental glass ionomer composition comprising
(A) a reactive particulate glass,
(B) a water-soluble polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction,
(C) a water-soluble , hydrolysis-stable monomer having a single polymerizable double bond and optionally a carboxylic acid group or hydroxyl group;
(D) a water-soluble, hydrolysis-stable polymerizable crosslinker having at least two polymerizable carbon-carbon double bonds; and
(E) a polymerization initiator system.