Self-adhesive dental restorative composition comprising (i) 10 to 40
percent by weight based on the total weight of the composition of a
mixture of hydrolysis-stable polymerizable monomers of the following
formula (I): wherein R is a m+n valent organic group having 1 to 20
carbon atoms and optionally 1 to 5 atoms selected from the group of
nitrogen, oxygen and sulfur atoms; A independently represents a moiety of
the following formula (II): wherein L is a hydrogen atom, a C1-6 alkyl
group, a C3-8 cycloalkyl group, a C6-14 aryl group or a group of the
following formula (III) wherein R' is a hydrogen atom, a C1-6 alkyl
group, a C3-8 cycloalkyl group, or a C6-14 aryl group; X is O, S, NH or
NR'' wherein R'' is a C1-6 alkyl group, a C3-8 cycloalkyl group, a C6-14
aryl group; a is 0 or 1; M is a group of the following formula (IV)
wherein Y is O, S, NH or NR''' wherein R''' is a C1-6 alkyl group, a C3-8
cycloalkyl group, a C6-14 aryl group; b is an integer of from O to 3; c
is O or 1; d is an integer of from O to 3; provided that when b is O,
then Y cannot be O; x is 0 or 1; y is 0 or 1; provided that x and y
cannot be both 1, and provided that x cannot be 1 when L or a group of
formula (III) is a hydrogen atom, and provided that when x is 0 then a is
also 0, and provided that when y is 0 then b is greater than 0 or c is 0;
B independently represents an acidic group; m is an integer of from 1 to
5; n is an integer of 0 to 3; and m+n is at least 2; (ii) 60 to 90
percent by weight based on the total weight of the composition of a
filler; and (iii) an initiator system; wherein the portion of monomers of
formula (I) wherein n is greater than 0 is at least 1 percent by weight
based on the total weight of the mixture.