Patent ID: 7097456

Claim:
A filling system comprising: (i) a curable sealant component which is capable of bonding to a tooth hard substance, (ii) a curable filling material component suitable for restorative dentistry, and (iii) a curing reduction component selected from the group consisting of: acids having a pKa value of less than 4.75, Lewis acids, acid metal salts, acid precursors, compounds which form strong acids with water, compounds which form strong acids with alcohols; a cation which forms cation-amine complexes; a non-initiating amine; a lithium salt; a divalent chelating cation compound; oxides of elements of the first to third main groups and subgroups of the Periodic Table of Elements, hydroxides of elements of the first to third main groups and subgroups of the Periodic Table of Elements, alkaline halides, alkaline earth halides and pseudohalides; wherein said component (iii) is incorporated in the said component (i) and component (ii), and wherein, upon curing of the sealant and filling material components, component (iii) reduces curing only in a boundary layer between sealant component and filling material component such that the bonding between the cured sealant component and the cured filling material component is less than the bonding of the cured sealant component to the tooth hard substance.