Non-aqueous dental adhesive comprising a mixture containing (i) one or morepolymerizable monomers optionally containing an acidic group, (ii) apolymerization initiator, and (iii) a thermal polymerization inhibitor of thefollowing formula (I) wherein R'1 represents a hydrogen atom, or a saturatedhydrocarbon group having 1 to 18 carbon atoms. R'2, which may be the same ordifferent if more than one R'2 is present, independently represent a saturatedhydrocarbon group having 1 to 18 carbon atoms, and c represents an integer offrom 1 to 4, and (iv) optionally an organic solvent.
