Dental cement composition comprising a polymerizable polyacidic polymer having repeating units in the polymer backbone, which are represented by the following formula (III):whereinX represents O, S, or NR', whereby R' represents a hydrogen atom or a straight or branched C1-C6 alkyl group, C3-C6 cycloalkyl group, or C4-C8 cycloalkylalkyl group,Y a group of the following formula (IV)wherein each of L3 and L4,which are independent from each other represents a single bond, a straight or branched C1-C6 alkylene group, a straight or branched C1-C6 alkenylene, or a straight or branched C1-C20 alkylene group which includes 1 to 8 atoms selected from oxygen and sulfur atoms,X' represents O, S, or NR", whereby R" represents a hydrogen atom or a straight or branched C1-C6 alkyl group, C3-C6 cycloalkyl group, or C4-C8 cycloalkylalkyl group,m is 0 to 3, andn is 0, whereinL3 in formula (IV) represent a straight or branched C1-C6 alkenylene, or other repeating units of the following formula (I), (II), or the above formula (III) or (IV) are present wherein n is 1, 2 or 3:wherein each of L1 and L2,which are independent from each other represents a single bond, a straight or branched C1-C6 alkylene group, a straight or branched C1-C6 alkenylene, or a straight or branched C1-C20 alkylene group which includes 1 to 8 atoms selected from oxygen and sulfur atoms, andX and Y are as defined above.
