A curable dental two-pack composition comprising:(a) a first paste comprising (a-1) one or more crosslinker having at least four primary amino groups； and(b) a second paste comprising (b-1) one or more compounds polymerizable with a crosslinker of the first paste in a step-growth polymerization reaction which have at least two 1,3-dioxolan-2-one groups selected from the following formula (A) and (B) attached to or connected by one or more organic groups:wherein R1, R2 and R3, which are independent from each other, represent a hydrogen atom or a C1-6 alkyl group.
